--- title: CyStack Security Services Reviews meta_title: 'CyStack Security Services Reviews 2026: Details, Pricing, & Features | G2' meta_description: Filter 22 reviews by the users' company size, role or industry to find out how CyStack Security Services works for a business like yours. aggregate_rating: rating_value: 4.9 review_count: 22 scale: '5' date_modified: '2026-06-04' parent_category: name: Security and Privacy Services url: https://www.g2.com/categories/security-and-privacy-services --- # CyStack Security Services Reviews **Vendor:** CyStack **Category:** [Cybersecurity Consulting Services](https://www.g2.com/categories/cybersecurity-consulting) **Average Rating:** 4.9/5.0 **Total Reviews:** 22 ## About CyStack Security Services CyStack Security Services is a set of solutions to help businesses manage their digital security. We offer a clear way to check, fix and watch over a company's security to keep data and systems safe. Our services are for all kinds of businesses, from small startups to big companies, that need help with security. The main goal is to protect a business, stop data leaks, and meet industry standards. CyStack offers its services through two distinct models, each tailored to specific business needs: Security Assessment Consulting: - What it is: A one-time project to check your systems for weak points. - How it helps: You get a simple report with clear steps to improve your security. - Value: It helps you find and fix problems before they become a bigger issue. Managed Security Services (MSSP): - What it is: Ongoing, 24/7 security monitoring. - How it helps: A team of experts watches for threats and responds fast. - Value: It lowers the risk of cyberattacks and limits damage when an incident happens. No matter if you need a quick check or full-time protection, CyStack gives you the tools and support to secure your business and help it grow. ## CyStack Security Services Reviews ### 1. Sharp Consulting and a No-Fluff API Pentest That Uncovered Real Risks **Rating:** 5.0/5.0 stars **Reviewed by:** Nguyen Q. | Mid-Market (51-1000 emp.) **Reviewed Date:** April 28, 2026 **What do you like best about CyStack Security Services?** I sit on the data side, not security, so my angle on this may be different from most reviewers. What got my attention was how CyStack handled the consulting piece before any testing started. They asked about our data flows: where shipment records move, where payment events get logged, who reads what. That conversation alone exposed two access patterns I'd been uncomfortable with for months but couldn't articulate to engineering as a real risk. Then on the pentest itself, they hit the API layer hard. Found a horizontal privilege escalation on one of our internal services. That one stung; it had been live for a while. Their write-up included the exact request, the response diff, and a one-line code-level explanation of why authorization was failing. No fluff. **What do you dislike about CyStack Security Services?** The platform UI works fine, but a few things felt clunky for someone who lives in dashboards: the date filters reset when you switch tabs, and I'd love darker theme support for late-night reviews. Nitpicks, honestly. **Recommendations to others considering CyStack Security Services:** Bring your data and infra people into the kickoff, not just security and engineering leads. We almost didn't, and that would've been a mistake. The folks who actually know where the sensitive data lives need to be in the room. Also, block out time for the debrief. Don't just take the report and disappear. Ask them to walk through the highest-severity findings live. Questions you don't think to ask in writing come up naturally in conversation. **What problems is CyStack Security Services solving and how is that benefiting you?** From a data analyst’s perspective, CyStack Security Services solve issues like hidden data vulnerabilities, lack of real-time visibility, and noisy or fragmented security logs. By providing continuous monitoring, vulnerability detection, and prioritized alerts, they help ensure data pipelines and systems are secure and reliable. This benefits you by reducing the risk of data breaches or corrupted datasets, improving data quality and trust in your analyses, and giving clearer, more actionable signals instead of overwhelming logs—so you can focus on analysis rather than firefighting security issues. **Official Response from Sơn Võ Thành:** > Thanks so much for this detailed review and for highlighting your experience from a data analyst's perspective! We appreciate you noticing our focus on data flows during the scoping phase, as well as our direct, actionable approach to the API penetration testing write-ups. It’s great to hear that our work helped uncover those hidden vulnerabilities and provided you with clearer signals. Thank you also for the feedback regarding the UI date filters and dark mode. Our product team has taken note on the issue. Finally, your advice to other users about involving data teams in the kickoff and prioritizing the live debrief is fantastic. Many thanks for choosing CyStack as your security partner. Best wishes, The CyStack Security Team ### 2. Exceptional Security Partner for High-Stakes Blockchain Projects **Rating:** 5.0/5.0 stars **Reviewed by:** Leo N. | Enterprise (> 1000 emp.) **Reviewed Date:** December 18, 2025 **What do you like best about CyStack Security Services?** We build and ship blockchain products for demanding clients, and CyStack is the team we call when failure is not an option. A good example is 1Ma**** – a network made by Vietnamese for Vietnamese, backed by leading financial and tech groups and tied to the country’s national blockchain strategy. On projects like that, what I appreciate most is that CyStack doesn’t give us a pretty PDF and disappear. They pressure-test the design, find real issues (not theoretical noise), sit down with our engineers, and stay with us through remediation and re-testing. We’ve done multiple audits with them now, and the pattern is consistent: clear priorities, practical fixes, and no drama. **What do you dislike about CyStack Security Services?** “Dislike” is a bit strong. The reality is: good security teams are busy and demanding. With CyStack, you need to plan ahead for big projects like 1Matrix because their senior people get booked quickly. And they ask a lot of questions up front - architecture, edge cases, deployment quirks. If your team isn’t well-prepared, that can feel heavy. **Recommendations to others considering CyStack Security Services:** If you’re running a flagship or sensitive project - national infrastructure, regulated finance, anything that will be in the headlines - treat CyStack as part of your core delivery team, not a late-stage checkbox. Loop them in early, especially on projects with the scale and visibility of 1Ma****. Share full context, give them real access, and put your senior engineers in the same room as their auditors. You’ll get far more value than just “passing an audit”; you’ll harden your architecture and avoid some very expensive surprises later. **What problems is CyStack Security Services solving and how is that benefiting you?** Cystack is our trusted partner in in many projects **Official Response from Sơn Võ Thành:** > Thank you for taking the time to share such a thoughtful and candid review. We truly appreciate the trust you place in CyStack, especially on projects where the stakes are high and there’s no margin for error. It means a lot to hear that our hands-on approach has been valuable to your team. That kind of collaboration is exactly how we believe security work should be done, particularly for large-scale and high-visibility blockchain initiatives. We also appreciate your honest note about planning ahead and the depth of our upfront questions. Your feedback motivates us to continue growing and further improving our processes. From the team here at CyStack, we look forward to continuing to support your team and contributing to the success of your most critical projects in the near future. ### 3. CyStack: Reliable Security with Seamless Integration **Rating:** 5.0/5.0 stars **Reviewed by:** Xuân M. **Reviewed Date:** November 05, 2025 **What do you like best about CyStack Security Services?** I really appreciate CyStack Security Services for their strong capability in securing and monitoring our cloud infrastructure and web applications, which has been crucial for us over the past year. Their vulnerability scanning, website protection, and secrets management features are top-notch. Switching from another provider turned out great because CyStack offered more localized support, faster response times, and better integration with our existing infrastructure, which made our transition smooth and cost-effective. They took the time to understand our infrastructure and security workflow in detail, which truly sets them apart. CyStack has been instrumental in addressing major challenges like vulnerability management, data protection, secrets management, and continuous monitoring. Their seamless integration with our Kubernetes cluster and cloud systems is impressive—it operates efficiently without degrading performance, and it generates quick, actionable reports. It's a lightweight and developer-friendly solution that heightened our security with minimal effort. I highly value their expertise and proactive approach; their vulnerability assessments are detailed, and the team's practical recommendations are clear and useful rather than just raw data. The combination of automated scanning with manual verification ensures high accuracy with fewer false positives. I also appreciate CyStack's reliability, responsiveness, and deep technical expertise. Their team consistently provides high-quality insights, quick support, and solutions adaptable to our growing infrastructure. The sense of reliability and continuous monitoring without interruptions gives us great confidence. **What do you dislike about CyStack Security Services?** No problem **What problems is CyStack Security Services solving and how is that benefiting you?** I use CyStack Security Services to secure our cloud infrastructure with vulnerability scanning and secrets management, offering localized support, fast response times, and seamless integration, enhancing security and efficiency. **Official Response from CyStack Customer Success:** > Thank you so much for sharing your experience and for trusting CyStack as your security partner. We’re thrilled to hear that our vulnerability management, secrets protection, and cloud monitoring solutions have added value to your infrastructure. Our team takes pride in providing both strong technical capabilities and localized support, so it’s great to know those aspects stood out to you. We truly appreciate your recognition of our detailed assessments and fast response — feedback like this keeps us motivated to keep improving. We’re glad to continue supporting your team’s growth and ensuring your systems stay secure and reliable. ### 4. Robust Security Audits with Unmatched Professionalism **Rating:** 5.0/5.0 stars **Reviewed by:** Khanh H. | Software Engineer **Reviewed Date:** November 03, 2025 **What do you like best about CyStack Security Services?** I have been using CyStack Security Services for over three years and have found their work extremely valuable. I am particularly impressed by their thoroughness in conducting security audits for our blockchain project, which helped identify and fix potential vulnerabilities in our smart contracts and system infrastructure. This, in turn, strengthened our project's security and built greater trust with our users and partners. I greatly value CyStack’s professionalism and attention to detail. Their audit reports are clear and easy to understand, with transparent steps for addressing issues. Additionally, the responsiveness of their team and their technical expertise make the entire engagement process smooth and reliable. CyStack's strong reputation and experience in the blockchain arena initially drew us to them, and their commitment to quality and consistent support has been reassuring. I appreciate their transparency and find their reliable support and commitment to quality as factors that make me confident in our ongoing partnership. My experience with CyStack has been so positive that I would unreservedly recommend them, rating my likelihood of recommending them a 10 out of 10. **What do you dislike about CyStack Security Services?** I've had a great experience with CyStack. One thing I'd love to see in the feature is more ongoing security monitoring or periodic re-audits to ensure long-term protection. **What problems is CyStack Security Services solving and how is that benefiting you?** CyStack Security Services helps us identify and fix vulnerabilities in our smart contracts and infrastructure, strengthens our project's security, and builds trust with users and partners. Their professionalism, detailed reports, and responsive support make the process smooth and reliable. **Official Response from CyStack Customer Success:** > We truly appreciate your trust and partnership over the past years. It means a lot to know our audits have played a part in strengthening your project’s security and building user confidence. Your feedback on ongoing monitoring and re-audits is spot-on and it’s something we’re actively working toward to support clients like you in the long run. Thank you again for growing with us and for your continued confidence in CyStack. ### 5. Exceptional security partner with world-class hacking expertise **Rating:** 5.0/5.0 stars **Reviewed by:** Tạ Đức T. | Head of Security Services, Small-Business (50 or fewer emp.) **Reviewed Date:** October 27, 2025 **What do you like best about CyStack Security Services?** CyStack's technical team is excellent. They don't just run standard tests - they really think like attackers. They understand how modern applications are built and how to exploit business logic flaws, not just basic vulnerabilities. What impressed me most is their professionalism and consistency - every engagement was well-documented, and their findings were always reproducible and clearly explained. **What do you dislike about CyStack Security Services?** Honestly, there's not much to dislike. If I had to mention something, maybe their schedule can get busy during high-demand periods - which just shows how many companies trust them. But they always communicate clearly and deliver as promised. **Recommendations to others considering CyStack Security Services:** If you're looking for a capable local partner for penetration testing or red teaming, CyStack is one of the best choices in Vietnam. They combine strong technical skills, ethical hacking experience, and a practical understanding of how software is built and secured. Great team to work with. **What problems is CyStack Security Services solving and how is that benefiting you?** Our company provides security assessment and red teaming services for large clients. We needed a trusted partner with deep offensive security expertise to support our projects during peak workload. CyStack became that partner - their team of ethical hackers consistently delivered high-quality findings and supported us in scaling our service delivery. Their understanding of both software development and security products makes collaboration smooth and efficient. **Official Response from CyStack Customer Success:** > Thank you so much for your thoughtful review and for trusting CyStack as your security partner! We truly appreciate your kind words about our team’s expertise and professionalism. Our goal has always been to approach every engagement with an attacker’s mindset while maintaining clear communication and actionable results. We’re glad to know our collaboration has helped support your projects during peak workloads and we look forward to continuing to grow together and strengthen your security operations even further. ### 6. A trustworthy professional security partner **Rating:** 5.0/5.0 stars **Reviewed by:** (謝易致) T. | Enterprise (> 1000 emp.) **Reviewed Date:** October 22, 2025 **What do you like best about CyStack Security Services?** Whether it's regular vulnerability scanning reports or immediate support during urgent security incidents, the CyStack team handles issues in a systematic, clear, and professional manner. Their security testing results not only identify risks but also provide actionable remediation suggestions, making the entire improvement process highly efficient. **What do you dislike about CyStack Security Services?** CyStack's technology and reporting quality are both excellent, but the format and visual presentation of its reports can sometimes be a bit technically oriented. For non-technical departments (such as management or clients), the presentation could be further optimized to make it easier to understand and make decisions. In addition, we would like to see some communication processes (such as progress tracking and status updates) become more automated and timely. **Recommendations to others considering CyStack Security Services:** If your company prioritizes the security of its websites, apps, or internal systems, CyStack is a highly desirable long-term partner. We recommend collaborating with them early in the partnership to clarify security goals and priorities, allowing for more targeted testing, monitoring, and improvement plans. They can not only help identify issues but also assist you in establishing a comprehensive security governance process, transitioning from reactive defense to proactive security management. **What problems is CyStack Security Services solving and how is that benefiting you?** Prevent data breaches and business interruptions. Protect critical enterprise data and services through early detection and prevention. Reduce security personnel and management costs. CyStack's professional team handles detection, monitoring, and emergency response, allowing enterprises to focus on their core business. Enhance customer trust and brand reputation. Third-party security protection and compliance certifications strengthen customer and partner trust. Gain continuous security improvement capabilities. CyStack provides security reporting and trend analysis, allowing enterprises to continuously optimize their security strategies. **Official Response from CyStack Customer Success:** > Thank you for sharing your detailed feedback. We’re happy to hear that our testing results and support have been valuable to your team. Your suggestions on improving report visualization and communication automation are greatly appreciated. We’re already exploring ways to make these experiences smoother for both technical and non-technical audiences. ### 7. Comprehensive Security Without Compromising Growth **Rating:** 5.0/5.0 stars **Reviewed by:** Hoat D. | Mid-Market (51-1000 emp.) **Reviewed Date:** October 21, 2025 **What do you like best about CyStack Security Services?** CyStack helped us build a full security program without slowing down our product growth. Their team combines continuous monitoring, manual pentests, and a bug bounty program, which gave us visibility on risks across our apps, cloud, and backend. Critical issues like SQL injection or data leaks were detected and fixed within 1–2 days instead of weeks. **What do you dislike about CyStack Security Services?** Nothing so far. The services are reliable, and the support team is responsive whenever we need help. **Recommendations to others considering CyStack Security Services:** CyStack is a strong choice if you need both proactive and ongoing security. Their team acts as an extension of your own, helping you stay protected without building a large internal security team. **What problems is CyStack Security Services solving and how is that benefiting you?** Working with CyStack has been smooth and effective. They cover monitoring, pentesting, bug bounty, and SOC in one service, so we have a clear view of our security posture at all times. Critical vulnerabilities are detected and fixed quickly, and their team is always available to support us. This allows us to focus on product growth while knowing our infrastructure and users are protected. **Official Response from CyStack Customer Success:** > Thank you so much for the thoughtful review and for trusting CyStack to be part of your growth journey. We’re thrilled to hear that our approach helps your team stay focused on building. We’re here whenever you need us. If there’s anything we can do to make your experience even better, please reach out to your Customer Success contact or email us at support@cystack.net. Thank you once again! ### 8. Accommodating Partner for Penetration Testing Needs **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Computer & Network Security | Small-Business (50 or fewer emp.) **Reviewed Date:** November 12, 2025 **What do you like best about CyStack Security Services?** We engaged CyStack Security Services to support our team with penetration testing projects, especially during periods of high demand when our internal capacity was stretched. As a cybersecurity-focused organization, maintaining both quality and speed in testing is critical to our operations. CyStack’s team proved to be an excellent extension of our capabilities. Their technical depth and strong understanding of complex security vulnerabilities helped us identify critical issues quickly and efficiently. Their clear communication, timely response, and professional project management made collaboration smooth and dependable. One of the most valuable aspects of working with CyStack is their flexibility and accommodating nature. They adapted well to our internal workflows and changing priorities without compromising quality or delivery timelines. The actionable reports and practical remediation guidance they provided enabled our teams to fix issues faster and more effectively. Overall, CyStack has been a reliable and trusted partner in helping us scale our security testing operations. Their combination of technical expertise, professionalism, and cooperative attitude makes this partnership both productive and sustainable. We look forward to continuing this collaboration in future projects. **What do you dislike about CyStack Security Services?** Nothing at this time. They were satisfactory in the services delivered to us **What problems is CyStack Security Services solving and how is that benefiting you?** Meet penetration testing demand **Official Response from Sơn Võ Thành:** > Thank you for such a detailed and positive review. We know that for a cybersecurity-focused organization, bringing in an external partner requires a high level of trust. We are honored that you view CyStack not just as a vendor, but as a true extension of your internal capabilities. It is fantastic to hear that our team’s flexibility and technical depth helped you navigate those periods of high demand. We deliberately design our Penetration Testing processes to be adaptable, fitting into your workflows rather than forcing you to adapt to ours, so it is very rewarding to know this approach kept your operations smooth and your delivery timelines on track. We look forward to continuing this collaboration and helping you scale your security operations whenever you need us. ### 9. Exceptional Expertise and Proactive Support from CyStack **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Information Technology and Services | Small-Business (50 or fewer emp.) **Reviewed Date:** November 11, 2025 **What do you like best about CyStack Security Services?** The best part of working with CyStack is their deep technical expertise and responsiveness. Their reports are always detailed, practical, and easy to understand, even for non-security teams. I also appreciate how proactive they are in providing updates, follow-ups, and sharing best practices that go beyond the original engagement scope. Their combination of technical depth and customer care really stands out. **What do you dislike about CyStack Security Services?** There’s honestly little to dislike. If anything, I’d say their detailed reports can be quite comprehensive, which sometimes takes extra time to digest — but that’s a good problem to have when you want thorough coverage. **Recommendations to others considering CyStack Security Services:** If you’re looking for a reliable, knowledgeable, and client-focused security partner, I highly recommend CyStack. They deliver both technical excellence and professional service. Whether you need penetration testing, compliance support, or ongoing security monitoring, CyStack can help you build a stronger and safer foundation for your business. **What problems is CyStack Security Services solving and how is that benefiting you?** CyStack has been instrumental in strengthening our organization’s overall security posture. Their penetration testing and continuous vulnerability management services helped us uncover issues that traditional scanning tools often miss. They’ve also provided us with valuable remediation guidance and security training, which greatly improved our internal awareness and incident response readiness. **Official Response from Sơn Võ Thành:** > Thank you for the amazing review! We are especially proud to hear that our reports are bridging the gap for your non-security teams. Making complex findings "practical and easy to understand" is central to our mission. Security works best when everyone in the organization can act on it, not just the experts. We also appreciate your note on the depth of our reports. We definitely aim for thoroughness to ensure that—as you noted—we catch the issues that automated tools often miss. We are glad you view that comprehensive coverage as a "good problem" to have! It is great to know that our combination of Penetration Testing, Vulnerability Management, and Security Training is improving your internal awareness and incident response readiness. We look forward to keeping your foundation strong and secure. ### 10. Exceptional Penetration Testing with Actionable Insights **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Accounting | Small-Business (50 or fewer emp.) **Reviewed Date:** November 11, 2025 **What do you like best about CyStack Security Services?** We are extremely satisfied with the penetration testing services provided by your team. The thoroughness of the assessment and the clarity of the final report were exemplary. Your findings provided us with actionable insights that significantly strengthened our security posture. **What do you dislike about CyStack Security Services?** I have no complaints. Everything has been good for me. **Recommendations to others considering CyStack Security Services:** We highly recommend CyStack's penetration testing services. Their team demonstrated deep technical expertise and a thorough understanding of modern attack vectors. The report was not only comprehensive but also provided clear, actionable remediation steps. If you're looking for a partner to truly challenge and strengthen your security posture, CyStack is an excellent choice. ​Key focus: Technical skill, comprehensive results, and practical advice. **What problems is CyStack Security Services solving and how is that benefiting you?** CyStack Security Services was instrumental in solving the critical business problem of identifying and mitigating hidden security vulnerabilities within our core digital infrastructure. Specifically, their professional Penetration Testing (Pentest) services provided a deep, real-world assessment of our applications, revealing exploitable weaknesses that manual internal checks had missed. The key benefit has been a significant boost to our overall security posture and regulatory compliance. This assurance directly translates to protecting sensitive customer data, preventing potentially catastrophic data breaches, and maintaining the trust essential for our business operations. **Official Response from Sơn Võ Thành:** > Thank you for your high praise! We are incredibly pleased to hear that our Penetration Testing services delivered exactly what we aim for. Our goal is always to truly challenge your defenses system with modern attack vectors, so knowing that this depth of testing translated into a significant boost for your security posture and regulatory compliance is a huge win for us. Protecting sensitive customer data is indeed the foundation of business trust, and we are proud to be the partner ensuring that foundation remains solid. We look forward to continuing this collaboration whenever you need us. ### 11. Professional, Reliable, and Insightful Security Partner **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Outsourcing/Offshoring | Small-Business (50 or fewer emp.) **Reviewed Date:** November 08, 2025 **What do you like best about CyStack Security Services?** What I appreciate most about CyStack Security Services is their professionalism and clarity throughout the entire engagement. Their team communicates complex technical findings in a way that’s easy to understand and directly tied to business impact. They’re also very responsive — whenever we had questions or needed clarification, they provided quick and detailed answers. The reports are well-structured, prioritizing risks effectively, which made it easier for our development team to take immediate action. Overall, the collaboration felt more like working with a partner than just a service provider. **What do you dislike about CyStack Security Services?** There isn’t much to dislike. That said, they were always transparent about timelines and kept us updated throughout the process. **Recommendations to others considering CyStack Security Services:** I’d recommend CyStack Security Services to any organization that takes security seriously but may not have a full in-house security team. Their approach is thorough, practical, and tailored to each client’s environment — not just a one-size-fits-all checklist. If you’re looking for a partner who can both identify vulnerabilities and help you understand how to fix them effectively, CyStack is a solid choice. Just make sure to plan the project timeline in advance, especially if you’re engaging them during a busy season, to get the most efficient turnaround. **What problems is CyStack Security Services solving and how is that benefiting you?** CyStack helps us identify and address security vulnerabilities across our systems before they can be exploited. Their vulnerability assessment and penetration testing services gave us clear, actionable insights rather than just technical reports. As a result, we’ve significantly improved our security posture, reduced potential attack surfaces, and built more confidence in our internal team’s ability to manage threats. It also helped us demonstrate compliance and reassure our partners about our security practices. **Official Response from Sơn Võ Thành:** > Greeting from CyStack. Reading that you felt like you were working with a partner rather than a service vendor really made our day. That is exactly the kind of relationship we strive to build with our clients. We know how overwhelming security data can get, so we are glad to hear that our focus on clarity helped your developers cut through the noise. Our goal is always to make sure you don't just see a list of technical problems, but actually understand the business impact as well so you can make the decision more easily. Thank you for trusting us to help you demonstrate compliance and build confidence with your own partners. We are here to support your team whenever you need us next. ### 12. Red Team Service Uncovers Vulnerabilities Effectively **Rating:** 5.0/5.0 stars **Reviewed by:** Son T. | Mid-Market (51-1000 emp.) **Reviewed Date:** November 10, 2025 **What do you like best about CyStack Security Services?** What I like best is the Red Team service, as it simulates real-world hacker attacks, allowing us to identify system vulnerabilities and weaknesses early, and take effective measures to address them. **What do you dislike about CyStack Security Services?** I am satisfied with most of the services; however, I think the WhiteHub feature could be further improved to better meet our needs. **Recommendations to others considering CyStack Security Services:** If your product is in the development stage, I recommend using CyStack’s Red Team or WhiteHub services, as they can help enhance the security of your application. **What problems is CyStack Security Services solving and how is that benefiting you?** The CyStack team has worked closely with us to identify security vulnerabilities early, provide effective remediation recommendations, and help make our product increasingly secure and reliable. **Official Response from Sơn Võ Thành:** > Thanks so much for the review! We are really happy to hear that our Red Team service helped you find those vulnerabilities early, and provided effective measures to support your team to achieve great things with modern cybersecurity. We also really appreciate your honest feedback regarding WhiteHub. We are working around the clock to refine our tools, so I have passed your comment along to our product team. This will make sure that every part of our service, including WhiteHub, meets your needs perfectly. Again, thank you for trusting us to help keep your product secure and reliable! ### 13. GREAT PARTNER for running a bug bounty program! **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Financial Services | Enterprise (> 1000 emp.) **Reviewed Date:** October 22, 2025 **What do you like best about CyStack Security Services?** The team is super supportive and easy to work with. They respond quickly, handle reports professionally, and make sure everything runs smoothly. I also really like that WhiteHub connects us with talented Vietnamese security researchers — it feels like we’re working together with the local security community, not just hiring a vendor **What do you dislike about CyStack Security Services?** Not much to complain about. Maybe the dashboard could be a bit more visual or easier to track long-term stats, but overall the experience has been excellent **Recommendations to others considering CyStack Security Services:** If you’re looking for a trusted local partner to help you run a bug bounty program or improve your product security, CyStack is a great choice. They know the community, understand what companies need, and really care about the results **What problems is CyStack Security Services solving and how is that benefiting you?** At Momo, we wanted to strengthen our security testing by working with ethical hackers in Vietnam. CyStack helped us launch and manage our bug bounty program through their WhiteHub platform. Thanks to their support, we’ve been able to find and fix real vulnerabilities that traditional security testing couldn’t catch. It’s been a great way to improve our overall security and build trust with our users. **Official Response from CyStack Customer Success:** > Thank you for your kind words and trust in CyStack. We’re proud to support Momo in strengthening its product security through collaboration with Vietnam’s ethical hacker community on WhiteHub. Your feedback on the dashboard is much appreciated. We’re continuously improving to make tracking and visualization even better. It’s been a pleasure working with your team and we look forward to growing this partnership further. ### 14. Incredibly Fast, Professional Support Every Time **Rating:** 5.0/5.0 stars **Reviewed by:** Thái P. | Mid-Market (51-1000 emp.) **Reviewed Date:** February 05, 2026 **What do you like best about CyStack Security Services?** Their support team is incredibly fast and professional. They always respond promptly and provide clear, effective solutions. **What do you dislike about CyStack Security Services?** Honestly, I don’t have anything significant to dislike. The service has been smooth and consistently reliable. **Recommendations to others considering CyStack Security Services:** I highly recommend CyStack for their professionalism, clear communication, and reasonable pricing. They provide excellent value for the quality of service. **What problems is CyStack Security Services solving and how is that benefiting you?** Finding hidden vulnerabilities in Systems **Official Response from Sơn Võ Thành:** > Hey Thái, Thanks for taking the time to tell us about your experience. We're delighted you saw how quickly and clearly our team responded. It's fantastic to hear that you felt our quick, accurate help and forthright communication were important to how we do business. We also appreciate your confidence in CyStack's methodology of identifying hidden vulnerabilities and providing substantial value. Your input makes us even more determined to create security services that are trustworthy and efficient. Best wishes to you and your team, Sơn Võ ### 15. Comprehensive Security Made Effortless with CyStack **Rating:** 4.5/5.0 stars **Reviewed by:** Verified User in Information Technology and Services | Small-Business (50 or fewer emp.) **Reviewed Date:** November 07, 2025 **What do you like best about CyStack Security Services?** What I like best about CyStack Security Services is how comprehensive yet easy to use their platform is. It combines vulnerability scanning, continuous monitoring, and detailed reporting in one dashboard, so I can see the full security posture of my applications without juggling multiple tools. **What do you dislike about CyStack Security Services?** The documentation for API usage and automation would benefit from including more real-world examples, especially for developers aiming to integrate security checks directly into their workflows. **What problems is CyStack Security Services solving and how is that benefiting you?** CyStack’s Vulnerability Scanning tools are designed to identify issues such as those listed in the OWASP Top 10, including SQL injection, cross-site scripting (XSS), broken authentication, and misconfiguration in web applications, APIs, and server IPs. Their Asset Monitoring service continuously keeps an eye on your web applications, sub-domains, APIs, and similar assets for potential exposures, such as open ports, risks of domain or sub-domain takeover, and leaked credentials. ### 16. A Reliable Security Partner with Great Customer Support **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Computer Software | Small-Business (50 or fewer emp.) **Reviewed Date:** February 05, 2026 **What do you like best about CyStack Security Services?** Great customer service, with clear communication around the cost, scope of work, and timeline. Their expertise is exceptional. They asked clarifying questions whenever necessary and helped us identify real security issues quickly with actionable guidance so that we could remediate them before the deadline. The final report was well organised and thoroughly documented. **What do you dislike about CyStack Security Services?** We really don't have anything to complain about. **What problems is CyStack Security Services solving and how is that benefiting you?** We engaged CyStack to support us with a Penetration Testing project as per our customer's request with a deadline to be met, and CyStack didn't disappoint us with their comprehensive report/deliverables. **Official Response from Sơn Võ Thành:** > Thanks so much for telling us about your experience. We appreciate your attention to noticing how well we communicated regarding the scope, cost, and dates, along with our technical approach during the engagement. We're delighted that the penetration testing results and final outcome suited your needs and helped to accomplish your goal. Many thanks for choosing CyStack as your security partner. Best wishes, Sơn Võ ### 17. Transparent, Reliable Testing with Excellent Communication **Rating:** 4.5/5.0 stars **Reviewed by:** Thu Phuong N. | Mid-Market (51-1000 emp.) **Reviewed Date:** October 23, 2025 **What do you like best about CyStack Security Services?** The team demonstrates strong English communication skills, which makes interactions smooth and clear. They provide a platform that allows for sharing real-time test results with clients, ensuring transparency throughout the process. Their testing approach is systematic, and the presence of certified team members adds to the reliability of their services. **What do you dislike about CyStack Security Services?** At times, the team misses deadlines and does not consistently follow up with the client regarding the timeline. **Recommendations to others considering CyStack Security Services:** The team demonstrates strong expertise and follows systematic workflows in line with ISO certification standards. Additionally, they regularly introduce a range of new cyber products which are impressive. **What problems is CyStack Security Services solving and how is that benefiting you?** They perform annual penetration testing on our applications. **Official Response from CyStack Customer Success:** > Thank you for taking the time to share your detailed feedback. We’re glad to hear that our communication, testing transparency, and systematic approach have contributed positively to your experience. We also appreciate your honest note about scheduling and follow-ups. This is valuable input that we’re actively working to improve through tighter project coordination and more proactive status updates. Your trust and continued collaboration mean a lot to us. We’re committed to maintaining the highest testing standards while ensuring a smoother experience for all our clients. ### 18. Exceptional Hands-On Security with Actionable Insights **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Computer Software | Small-Business (50 or fewer emp.) **Reviewed Date:** November 05, 2025 **What do you like best about CyStack Security Services?** What I like best about CyStack Security Services is their hands-on, transparent approach to cybersecurity. They don’t just deliver reports — they actively work with your team to identify root causes, prioritize critical risks, and provide clear, actionable remediation steps. **What do you dislike about CyStack Security Services?** What I dislike about CyStack Security Services is that some of their processes still feel a bit manual and communication-heavy, especially during large-scale assessments. While their technical work is solid, the reporting and ticketing workflow could be more automated or better integrated with internal tools like Jira or GitLab. **What problems is CyStack Security Services solving and how is that benefiting you?** CyStack Security addresses the growing challenge of protecting digital assets in an increasingly complex and hostile cyber environment. They focus on proactive security — identifying vulnerabilities before attackers do — through services like penetration testing, security monitoring, and vulnerability assessment. **Official Response from CyStack Customer Success:** > Thank you for the thoughtful review and for recognizing our hands-on and transparent approach to security. We’re glad that our collaboration and actionable recommendations have brought real value to your team. We also truly appreciate your feedback regarding process automation and integration with tools like Jira and GitLab. That’s an area we’re actively improving to make collaboration even smoother and more efficient in large-scale projects. Your trust and insights mean a lot to help us keep evolving and deliver an even better experience. ### 19. Good cybersecurity team can help you solve problems more quickly~ **Rating:** 4.5/5.0 stars **Reviewed by:** (張志惟) W. | Small-Business (50 or fewer emp.) **Reviewed Date:** October 22, 2025 **What do you like best about CyStack Security Services?** Highly professional and provided us with solutions to address the issues we encountered. **What do you dislike about CyStack Security Services?** I was completely satisfied with this collaboration — there was nothing I didn’t like. **Recommendations to others considering CyStack Security Services:** Any issues can be brought to their attention, and CyStack will assist in resolving them with great patience. **What problems is CyStack Security Services solving and how is that benefiting you?** The penetration testing service was conducted with the support of the CyStack team. They were highly professional and efficient, clearly identifying the vulnerabilities in our system and assisting us in making improvements. CyStack is a trustworthy cybersecurity partner, and we would gladly work with them again in the future. **Official Response from CyStack Customer Success:** > Thank you for your thoughtful review. We’re glad to hear our penetration testing service helped your team identify and address vulnerabilities effectively. Your trust means a lot to us and we look forward to continuing to support your security journey. ### 20. Exceptional Expertise and Outstanding Team Support **Rating:** 5.0/5.0 stars **Reviewed by:** Thang N. | Mid-Market (51-1000 emp.) **Reviewed Date:** November 05, 2025 **What do you like best about CyStack Security Services?** Their expertise and comprehensive approach to every detail, combined with the unwavering support of a skilled and outstanding team, truly stand out. **What do you dislike about CyStack Security Services?** I honestly can't think of anything critical. **Recommendations to others considering CyStack Security Services:** Give them a try—you won't regret it. **What problems is CyStack Security Services solving and how is that benefiting you?** CyStack conducted an IT security assessment for us and offered valuable consultation regarding IT risks. As a result, our systems have been reinforced and are now better protected with updated procedures and additional security layers. **Official Response from CyStack Customer Success:** > Thank you so much for your kind words and for sharing your experience with CyStack! We’re delighted to know that our team’s expertise and dedication made a real difference in strengthening your systems. Our goal has always been to combine technical excellence with reliable support, so feedback like yours truly motivates us to keep raising the bar. We really appreciate your trust and recommendation. It means a lot to our entire team. ### 21. A service that is useful for enterprises in terms of security. **Rating:** 4.5/5.0 stars **Reviewed by:** Trần Nhật T. | Enterprise (> 1000 emp.) **Reviewed Date:** November 18, 2025 **What do you like best about CyStack Security Services?** The partner’s support and attentiveness to the customer. **What do you dislike about CyStack Security Services?** I’m unable to switch the ticket status when using my mobile device. **Recommendations to others considering CyStack Security Services:** The platform needs to continue maintaining its appeal to talented bug bounty hunters, not only in terms of quantity but also quality. **What problems is CyStack Security Services solving and how is that benefiting you?** CyStack Security Services-Whitehub.net provide an additional external defense layer that enhances application security. **Official Response from Sơn Võ Thành:** > Hi Trần Nhật, Thank you for your feedback and for highlighting our team’s support and attentiveness. We’re glad CyStack is adding value as an external security layer for your applications. We apologize for the inconvenience you experienced with updating ticket status on mobile. Our team is actively reviewing the mobile workflow to improve usability and consistency across devices. Thank you for your trust and for helping us improve. Best regards, Sơn Võ ### 22. Helpful for PCI Assessment, but Application Pentesting Needs More Attention **Rating:** 4.0/5.0 stars **Reviewed by:** Bill N. | Small-Business (50 or fewer emp.) **Reviewed Date:** October 13, 2025 **What do you like best about CyStack Security Services?** They have helped us to pass PCI Assessment. **What do you dislike about CyStack Security Services?** Sometimes their team missed our application pentesting requirements. **Recommendations to others considering CyStack Security Services:** The CyStack technical team needs to perform the scanning at night to avoid interrupting customer service. **What problems is CyStack Security Services solving and how is that benefiting you?** They have helped us to find out and fix many problem on our web-application and Android-application. **Official Response from CyStack Customer Success:** > Dear Bill, thank you for sharing your experience. We're glad our team helped you pass the PCI assessment and resolve issues across your web and Android applications. We're sorry some app-testing requirements were missed. We've strengthened our scoping, scheduling, and communication processes, and we'll validate any affected items at no cost and issue an addendum. We appreciate your feedback; it helps us get better. Please email support@cystack.net and we'll schedule the validation at a time that works for you. - [View CyStack Security Services pricing details and edition comparison](https://www.g2.com/products/cystack-security-services/reviews?section=pricing&secure%5Bexpires_at%5D=2026-06-21+08%3A25%3A33+-0500&secure%5Bsession_id%5D=d6ff2bd8-ca35-4766-862b-fa4fa613d002&secure%5Btoken%5D=40bc198df220098a0f2bf9003ae9cadaaaa5c01d6f5ad5f6ce33ceb4d97c45a8&format=llm_user) ## CyStack Security Services Features **Planning** - Needs Assessment - Resource Allocation - Stayed within Budget - Statement of Work - Best Practices **Agentic AI - Penetration Testing** - Autonomous Task Execution - Multi-step Planning - Adaptive Learning **Delivery** - Technical Expertise - Met Deadlines - Meeting Management - Project Updates - Scope Management - Roll-out **Team Quality** - Change Management Skills - Executive Presence - Vertical Expertise - Technology Partnerships ## Top CyStack Security Services Alternatives - [Insight Assurance](https://www.g2.com/products/insight-assurance/reviews) - 4.8/5.0 (133 reviews) - [SHI](https://www.g2.com/products/shi/reviews) - 4.7/5.0 (116 reviews) - [Johanson Group](https://www.g2.com/products/johanson-group/reviews) - 4.9/5.0 (104 reviews)