# Top Free Vulnerability Scanner Software - Page 5 ## How Many Vulnerability Scanner Software Products Does G2 Track? **Total Products under this Category:** 223 ### Category Stats (Aug 2026) - **Average Rating:** 4.58/5 The average rating of products in this category, based on all submitted ratings - **Top Trending Product:** Finite State (+1.29%) - Among all products in this category, Finite State recorded the largest rating increase compared to last month _Last updated: August 01, 2026_ ## How Does G2 Rank Vulnerability Scanner Software Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 7,700+ Authentic Reviews - 223+ Products - Unbiased Rankings G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category. ## G2 Grid® for Vulnerability Scanner Software ![G2 Grid® for Vulnerability Scanner Software plotting products by satisfaction and market presence](https://www.g2.com/categories/vulnerability-scanner/grids.png?focus%5B%5D=146504&focus%5B%5D=1259627&focus%5B%5D=123609&focus%5B%5D=32494&focus%5B%5D=151443&focus%5B%5D=154599&focus%5B%5D=27706&focus%5B%5D=20460) Highlighted products: Wiz, Aikido Security, Orca Security, Tenable Nessus, CrowdStrike Falcon Cloud Security, Astra Pentest, Intruder, and Sysdig Secure. Underlying data: [Grid® JSON](https://www.g2.com/categories/vulnerability-scanner/grids.json?focus%5B%5D=wiz-wiz&focus%5B%5D=aikido-security&focus%5B%5D=orca-security&focus%5B%5D=tenable-nessus&focus%5B%5D=crowdstrike-falcon-cloud-security&focus%5B%5D=astra-pentest&focus%5B%5D=intruder&focus%5B%5D=sysdig-sysdig-secure) **Sponsored** ### Aikido Security Aikido Security is the developer-first security platform that unifies code, cloud, protection, and attack testing in one suite of best-in-class products. Built by developers for developers, Aikido helps teams of any size ship secure software faster, automate protection, and simulate real-world attacks with AI-driven precision. The platform’s proprietary AI cuts noise by 95%, delivers one-click fixes, and saves developers 10+ hours per week. Aikido Intel proactively uncovers vulnerabilities in open source packages before disclosure, helping secure more than 50,000 organizations worldwide, including Revolut, Niantic, Visma, Montblanc, and GoCardless. [Visit website](https://www.g2.com/external_clickthroughs/record?secure%5Bad_program%5D=ppc&secure%5Bad_slot%5D=category_product_list_llm&secure%5Bcategory_id%5D=1423&secure%5Bchosen_at%5D=2026-08-01T06%3A40%3A17Z&secure%5Bdisplayable_resource_id%5D=1423&secure%5Bdisplayable_resource_type%5D=Category&secure%5Bmedium%5D=sponsored&secure%5Bplacement_reason%5D=page_category&secure%5Bplacement_resource_ids%5D%5B%5D=1423&secure%5Bprioritized%5D=false&secure%5Bproduct_id%5D=1259627&secure%5Bresource_id%5D=1423&secure%5Bresource_type%5D=Category&secure%5Bsource_type%5D=category_page&secure%5Bsource_url%5D=https%3A%2F%2Fwww.g2.com%2Fcategories%2Fvulnerability-scanner%2Ffree%3Fcategory_id%3Dvulnerability-scanner%26page%3D5&secure%5Btoken%5D=34865689e6ba21624be3f43d50f5640c26ad23962a024154afb3e0eed472223a&secure%5Burl%5D=https%3A%2F%2Fwww.aikido.dev%2Fuse-cases%2Fvulnerability-management%3Futm_source%3Dg2%26utm_campaign%3Dg2-promoted-listing-vulnerability-mgmt%26utm_medium%3Dcpc&secure%5Burl_type%5D=custom_url) ### [Prelude Security](https://www.g2.com/products/prelude-security/reviews) Prelude helps security and IT teams continuously validate that their security controls are fully deployed, optimally configured, and working as intended. Through read-only, API integrations to your existing tools like EDR, IAM, email security, MDM, vulnerability management, and others, Prelude drives visibility across controls and identifiese critical gaps and misconfigurations in your environment. With automated control assessments mapped to leading frameworks like MITRE ATT&CK and NIST, Prelude turns otherwise siloed and fragmented security data into clear visibility, actionable insights, and a measurable assurance of your security posture. **Average Rating:** 5.0/5.0 **Total Reviews:** 1 #### How Do G2 Users Rate Prelude Security? - **Has the product been a good partner in doing business?:** 10.0/10 (Category avg: 9.2/10) - **Detection Rate:** 10.0/10 (Category avg: 8.9/10) - **Automated Scans:** 10.0/10 (Category avg: 9.0/10) - **Configuration Monitoring:** 10.0/10 (Category avg: 8.5/10) #### Who Is the Company Behind Prelude Security? - **Seller:** [Prelude Security](https://www.g2.com/sellers/prelude-security-ceb134d5-4607-4b29-a71b-62977bcfdc52) - **Year Founded:** 2020 - **HQ Location:** N/A - **Twitter:** @preludeorg 1,550 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=b07ecbc4de3a9188d292b0a2175ef5de2c567d31526ad012cf2dde9db63b0be2&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fpreludesecurity&secure%5Burl_type%5D=linkedin_company_website) 40 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 100% Medium #### What Are Recent G2 Reviews of Prelude Security? **["Painless integration and immediately valuable insight"](https://www.g2.com/survey_responses/prelude-security-review-8699786)** **Rating:** 5.0/5.0 stars _— Verified User in Financial Services_ [Read full review](https://www.g2.com/survey_responses/prelude-security-review-8699786) ### [PT Application Inspector](https://www.g2.com/products/pt-application-inspector/reviews) PT Application Inspector™ (PT AI™) is a comprehensive source code analysis tool that offers protection for web applications of any scale. Its holistic approach combines the advantages of static, dynamic, and interactive analysis to maintain application security throughout every stage of development—from the very first line of code to the go-live. **Average Rating:** 5.0/5.0 **Total Reviews:** 2 #### How Do G2 Users Rate PT Application Inspector? - **Has the product been a good partner in doing business?:** 10.0/10 (Category avg: 9.2/10) - **Detection Rate:** 10.0/10 (Category avg: 8.9/10) - **Automated Scans:** 10.0/10 (Category avg: 9.0/10) #### Who Is the Company Behind PT Application Inspector? - **Seller:** [Positive Technologies](https://www.g2.com/sellers/positive-technologies) - **HQ Location:** N/A - **Twitter:** @PTsecurity\_UK 6 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=72d1f72f1158c4fa727ba2e5c23b6cdf81412fcdbe1d7abe21c044b6641c9991&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fpositivetechnologies%2F&secure%5Burl_type%5D=linkedin_company_website) 776 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 67% Large, 33% Small #### What Are Recent G2 Reviews of PT Application Inspector? **["We chose PT AI for SDL"](https://www.g2.com/survey_responses/pt-application-inspector-review-3356602)** **Rating:** 5.0/5.0 stars _— Verified User in Information Technology and Services_ [Read full review](https://www.g2.com/survey_responses/pt-application-inspector-review-3356602) **["Nice source code analyzer "](https://www.g2.com/survey_responses/pt-application-inspector-review-3394127)** **Rating:** 5.0/5.0 stars _— Verified User in Banking_ [Read full review](https://www.g2.com/survey_responses/pt-application-inspector-review-3394127) #### What Are G2 Users Discussing About PT Application Inspector? - [What is PT Application Inspector used for?](https://www.g2.com/discussions/what-is-pt-application-inspector-used-for) ### [Scanely](https://www.g2.com/products/scanely/reviews) Scanely is a dynamic QR code platform built for businesses that use print marketing. Founded in 2026 and built on Cloudflare's global edge network, Scanely serves small businesses, restaurants, retailers, and marketing agencies worldwide. The platform lets users create dynamic QR codes that track every scan in real time — capturing city-level location, device type, browser, OS, referrer, and time of day. Unlike static QR codes, destinations can be changed anytime without reprinting. Features include an interactive scan map with city-level pins, A/B testing with weighted traffic distribution, UTM parameter auto-append, campaign tags, branded PDF and CSV report exports, custom QR styling with logos and gradients, password protection, and scheduled redirects. Scanely solves a simple problem: businesses spend money on flyers, posters, packaging, and menus but have no way to measure which materials actually drive customers. With Scanely, every printed piece becomes a trackable marketing channel with real-time analytics, so businesses can stop guessing and start optimizing their offline campaigns. **Average Rating:** 5.0/5.0 **Total Reviews:** 1 #### How Do G2 Users Rate Scanely? - **Detection Rate:** 10.0/10 (Category avg: 8.9/10) - **Automated Scans:** 10.0/10 (Category avg: 9.0/10) - **Configuration Monitoring:** 10.0/10 (Category avg: 8.5/10) #### Who Is the Company Behind Scanely? - **Seller:** [Scanely](https://www.g2.com/sellers/scanely) - **HQ Location:** N/A - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=7886df2ed926834e5eb248c77dcfa8e5c815d3ab1f0fe3132ced0dba45868834&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2FNo-Linkedin-Presence-Added-Intentionally-By-DataOps&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 100% Small #### What Are Recent G2 Reviews of Scanely? **["Simple, Professional App That’s Easy to Use"](https://www.g2.com/survey_responses/scanely-review-12790936)** **Rating:** 5.0/5.0 stars _— Anna D._ [Read full review](https://www.g2.com/survey_responses/scanely-review-12790936) ### [Securitystatus](https://www.g2.com/products/securitystatus/reviews) SecurityStatus.io is a domain security assessment and external attack surface monitoring platform that evaluates the internet-visible security posture of websites and domains. It is designed for security teams, IT and DevOps teams, and agencies that need an external view of domain configuration and exposure without installing agents on scanned systems. SecurityStatus.io runs 40 automated checks grouped into four categories and summarises results as a 100-point score or letter grade (A+ to F), with category-level scoring showing how each area contributes to the overall grade. The four check categories are: Encryption and SSL – certificate validity and expiry, TLS protocol and cipher configuration, certificate transparency signals, HTTPS redirect behaviour, and SSL coverage across common subdomains DNS and Email Security – domain and email controls including SPF, DKIM, DMARC, MTA-STS, TLS reporting records, BIMI, DNSSEC, and CAA records Headers and Web App – HTTP security headers and related browser-facing configuration signals Infrastructure and Intelligence – open ports, subdomain takeover indicators, CVE exposure signals, exposed secrets, and dark web exposure monitoring Scans are initiated by entering a domain name and evaluating publicly accessible information. Results are presented as category scores and issue-level findings grouped by severity, with remediation guidance provided so teams can address specific gaps and verify fixes by rescanning. The platform supports repeat scans and scan history for tracking changes over time. Additional capabilities include scheduled scans, email alerts on findings, PDF security reports, and an embeddable security status widget. Common use cases include baseline assessments during onboarding, periodic external security reviews, verification after DNS, hosting, certificate, or application changes, and producing evidence for security questionnaires and audit requests that depend on externally verifiable configuration checks. **Average Rating:** 5.0/5.0 **Total Reviews:** 1 #### How Do G2 Users Rate Securitystatus? - **Has the product been a good partner in doing business?:** 10.0/10 (Category avg: 9.2/10) - **Detection Rate:** 10.0/10 (Category avg: 8.9/10) #### Who Is the Company Behind Securitystatus? - **Seller:** [cyberneticsplus services](https://www.g2.com/sellers/cyberneticsplus-services) - **Year Founded:** 2022 - **HQ Location:** Bengaluru South, IN - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=f1113e8dec232f245389a18bfd7da7ece6062e006c690770250a5a5f90854d28&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fcyberneticsplusservices%2F&secure%5Burl_type%5D=linkedin_company_website) 3 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 100% Small #### What Are Recent G2 Reviews of Securitystatus? **["Incredibly Simple—Found Site Vulnerabilities in 30 Seconds"](https://www.g2.com/survey_responses/securitystatus-review-12541775)** **Rating:** 5.0/5.0 stars _— S R._ [Read full review](https://www.g2.com/survey_responses/securitystatus-review-12541775) ### [Secyour App](https://www.g2.com/products/secyour-app/reviews) Secyour is an online vulnerability scanner that uncovers the vulnerabilities in your website to mitigate the risks of data breaches. **Average Rating:** 5.0/5.0 **Total Reviews:** 1 #### Who Is the Company Behind Secyour App? - **Seller:** [Homains OÜ](https://www.g2.com/sellers/homains-ou) - **HQ Location:** N/A - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=7886df2ed926834e5eb248c77dcfa8e5c815d3ab1f0fe3132ced0dba45868834&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2FNo-Linkedin-Presence-Added-Intentionally-By-DataOps&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® #### What Are Recent G2 Reviews of Secyour App? **["Quick way to monitor and secure my websites"](https://www.g2.com/survey_responses/secyour-app-review-6688324)** **Rating:** 5.0/5.0 stars _— Ahmed M._ [Read full review](https://www.g2.com/survey_responses/secyour-app-review-6688324) #### What Are G2 Users Discussing About Secyour App? - [What is Secyour App used for?](https://www.g2.com/discussions/what-is-secyour-app-used-for) ### [Sn1per Professional](https://www.g2.com/products/sn1persecurity-llc-sn1per-professional/reviews) Sn1per Professional is an all-in-one offensive security platform that provides a comprehensive view of your internal and external attack surface and offers an asset risk scoring system to prioritize, reduce, and manage risk. With Sn1per Professional, you can discover the attack surface and continuously monitor it for changes. It integrates with the leading open source and commercial security testing tools for a unified view of your data. **Average Rating:** 4.5/5.0 **Total Reviews:** 1 #### How Do G2 Users Rate Sn1per Professional? - **Detection Rate:** 8.3/10 (Category avg: 8.9/10) - **Automated Scans:** 10.0/10 (Category avg: 9.0/10) - **Configuration Monitoring:** 8.3/10 (Category avg: 8.5/10) #### Who Is the Company Behind Sn1per Professional? - **Seller:** [Sn1perSecurity](https://www.g2.com/sellers/sn1persecurity) - **HQ Location:** Scottsdale, US - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=4a3ea0f220f148c50a32c36fccc5bacb9e86da195a5c363ce9648980b34dadfc&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fsn1persecurity%2F&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 100% Large #### What Are Recent G2 Reviews of Sn1per Professional? **["Sn1per Professional review"](https://www.g2.com/survey_responses/sn1per-professional-review-7540683)** **Rating:** 4.5/5.0 stars _— Verified User in Military_ [Read full review](https://www.g2.com/survey_responses/sn1per-professional-review-7540683) ### [XSignal.io Online Vulnerability Scanner](https://www.g2.com/products/xsignal-io-online-vulnerability-scanner/reviews) XSIgnal.io is a new cloud-based vulnerability scanner of the external network infrastructure perimeter that can scan any type of resources / hosts / websites/subnet in just 15 minutes **Average Rating:** 5.0/5.0 **Total Reviews:** 1 #### How Do G2 Users Rate XSignal.io Online Vulnerability Scanner? - **Has the product been a good partner in doing business?:** 10.0/10 (Category avg: 9.2/10) - **Detection Rate:** 8.3/10 (Category avg: 8.9/10) - **Automated Scans:** 10.0/10 (Category avg: 9.0/10) - **Configuration Monitoring:** 10.0/10 (Category avg: 8.5/10) #### Who Is the Company Behind XSignal.io Online Vulnerability Scanner? - **Seller:** [XSIGNAL](https://www.g2.com/sellers/xsignal) - **Year Founded:** 2020 - **HQ Location:** Delaware, US - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=05c9dd5dfc9e7add0642c1a82e4afc9ea395a0b2af929a71b7c6b2e374ac33a6&secure%5Burl%5D=http%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fxsignal&secure%5Burl_type%5D=linkedin_company_website) 4 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 100% Small #### What Are Recent G2 Reviews of XSignal.io Online Vulnerability Scanner? **["Everything is clear and easy"](https://www.g2.com/survey_responses/xsignal-io-online-vulnerability-scanner-review-4989032)** **Rating:** 5.0/5.0 stars _— Герман ._ [Read full review](https://www.g2.com/survey_responses/xsignal-io-online-vulnerability-scanner-review-4989032) #### What Are G2 Users Discussing About XSignal.io Online Vulnerability Scanner? - [What is XSignal.io Online Vulnerability Scanner used for?](https://www.g2.com/discussions/what-is-xsignal-io-online-vulnerability-scanner-used-for) ### [CapaOne](https://www.g2.com/products/capaone/reviews) CapaOne is developed by CapaSystems - a Danish software house with more than 25 years legacy of excellence. Since 1997, we have been dedicated to delivering software that provides a better overview, improves end-user experience, and increases flexibility while reducing costs. The purpose of CapaOne is simple: Defend the world against digital threats. CapaOne is a cloud-based SaaS platform that provides IT teams with a smarter way to manage Microsoft, Android, and Apple endpoints. By consolidating patch management, driver updates, vulnerability scanning, admin privileges, and asset visibility into one solution, it effectively reduces tool sprawl, simplifies operations, and lowers total cost of ownership. #### Who Is the Company Behind CapaOne? - **Seller:** [CapaSystems AS](https://www.g2.com/sellers/capasystems-as) - **Year Founded:** 1997 - **HQ Location:** Taastrup, Denmark - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=72cafad2cab29d9e1a01bcea27dc5f27ccf4e3c00b2496e0b28d36896aa5b808&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fcapaone%2F&secure%5Burl_type%5D=linkedin_company_website) 32 employees on LinkedIn® ### [CVE Scan](https://www.g2.com/products/cve-scan/reviews) CVE Scan is a vulnerability monitoring and remediation tool for embedded Linux and Zephyr systems. It helps device manufacturers detect and monitor CVEs to ensure cybersecurity compliance (Cyber Resilience Act) thanks to advanced filtering techniques to reduce false positives and visual dashboards. #### Who Is the Company Behind CVE Scan? - **Seller:** [The Embedded Kit](https://www.g2.com/sellers/the-embedded-kit) - **HQ Location:** Seattle, US - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=4f165f1989683722ee4b85085b33f610a704fd2211df40e762bd441489d03d70&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Ftheembeddedkit%2F&secure%5Burl_type%5D=linkedin_company_website) 6 employees on LinkedIn® ### [EdgeWatch Attack Surface Management Platform](https://www.g2.com/products/edgewatch-attack-surface-management-platform/reviews) Edgewatch is an Attack Surface Management Platform that assists companies in discovering, monitoring, and analyzing devices accessible from the Internet. Edgewatch continuously scans public IP addresses to reveal a digital footprint, offering an external perspective of the online infrastructure. #### Who Is the Company Behind EdgeWatch Attack Surface Management Platform? - **Seller:** [Edgewatch](https://www.g2.com/sellers/edgewatch) - **Year Founded:** 2019 - **HQ Location:** Paterna, es - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=cb7953cc67dc1a79928aa23d7d59bb31da8706257f95aeb8eff530c4b661ba5b&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fedgewatch&secure%5Burl_type%5D=linkedin_company_website) 2 employees on LinkedIn® ### [Enclave](https://www.g2.com/products/enclave/reviews) Enclave is a modern network segmentation platform that combines – access control, asset inventory, encryption and zero trust network access – to create a breakthrough microsegmentation solution that prioritizes both IT and cybersecurity’s highest level needs. Enclave is purpose-built to simultaneously secure and segment your networks. Limit the damage a bad actor can do by decreasing the digital square footage they can explore. Easily implement access controls for employees, support staff, and third party vendors while never disrupting current operations. **Average Rating:** 5.0/5.0 **Total Reviews:** 1 #### How Do G2 Users Rate Enclave? - **Has the product been a good partner in doing business?:** 10.0/10 (Category avg: 9.2/10) #### Who Is the Company Behind Enclave? - **Seller:** [SideChannel](https://www.g2.com/sellers/sidechannel) - **Year Founded:** 2017 - **HQ Location:** Worcester, US - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=33c6c38a657e989488ac983111197d2eed7cc5115ab4498d15e0c8f6b8c1ff92&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fsidechannelsecurity&secure%5Burl_type%5D=linkedin_company_website) 40 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 100% Small #### What Are Recent G2 Reviews of Enclave? **["Enclave has been helpful but I think it may be more now."](https://www.g2.com/survey_responses/enclave-review-9568077)** **Rating:** 5.0/5.0 stars _— Oscar N._ [Read full review](https://www.g2.com/survey_responses/enclave-review-9568077) ### [Luna](https://www.g2.com/products/luna-2026-03-24/reviews) Luna is an external vulnerability scanning platform that helps businesses discover and fix security weaknesses across their internet-facing infrastructure. Using 11,000+ security templates, Luna detects CVEs, misconfigurations, and common web vulnerabilities including XSS, SQLi, RCE, and SSRF across websites, servers, and network services. The platform offers four scan modes, Quick, Comprehensive, CVE-only, and Deep, with port scanning across the top 1,000 ports, SSL/TLS certificate analysis, and CVSS-based risk scoring for every finding. Vulnerabilities are mapped to OWASP Top 10 2025 categories with compliance reporting for Cyber Essentials, ISO 27001, SOC 2, PCI DSS, and GDPR. Luna is fully cloud-based with nothing to install. Teams can add domains or IP addresses and run their first scan in under five minutes. Scheduled scans run on custom cron expressions with Slack and email alerts for critical findings. A full REST API supports CI/CD pipeline integration. The platform includes vulnerability lifecycle management to track findings from Open to Acknowledged to Fixed, with false positive marking and remediation guidance. Reports export as PDF, CSV, or JSON. Luna is designed for lean IT teams, startups, and SMEs that need enterprise-grade vulnerability scanning without enterprise pricing or complexity. Plans start at $249/month for up to 50 targets, with a 14-day free trial. #### Who Is the Company Behind Luna? - **Seller:** [Luna](https://www.g2.com/sellers/luna-98c6c837-815d-410d-b69d-a9ea502f640e) - **Year Founded:** 2025 - **HQ Location:** London, GB - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=eb4fe5515cbb2251f91b5b25aa360c6f1bf7124e76b2672ea4150f9d1892d4ae&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Flunatech-xyz%2F&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® ### [NESS](https://www.g2.com/products/ness-2024-06-27/reviews) NESS (Network Environment Scanning and Security), focuses on developing software to help companies prevent and predict cyberattacks and failures within their technological infrastructure. #### Who Is the Company Behind NESS? - **Seller:** [NESS](https://www.g2.com/sellers/ness-d7fd3986-5a3c-48b9-b23c-5af7c8b2cffe) - **Year Founded:** 2023 - **HQ Location:** Bogotá, CO - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=661f6cf46739d91097d0764d469baa1415195d9e6829cdeb60bc6ba5687d4629&secure%5Burl%5D=http%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fness-ses&secure%5Burl_type%5D=linkedin_company_website) 6,042 employees on LinkedIn® ### [N-Stalker](https://www.g2.com/products/n-stalker/reviews) N-Stalker Web Application Security Scanner X is a web security assessment solution for web applications. #### Who Is the Company Behind N-Stalker? - **Seller:** [N-Stalker](https://www.g2.com/sellers/n-stalker) - **Year Founded:** 2000 - **HQ Location:** Curitiba, BR - **Twitter:** @nstalker 677 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=0bc97eb803ceb7c6f30a389e319c7dec7188aa5d104b9bd91cecdec9aafaebed&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2F254989&secure%5Burl_type%5D=linkedin_company_website) 4 employees on LinkedIn® ### [Olimpio Security](https://www.g2.com/products/olimpio-security/reviews) Olimpio is an external vulnerability scanner built for UK small businesses. It scans your domain for security weaknesses — open ports, missing email authentication records, expired SSL certificates, HTTP security headers, exposed API keys, and known software vulnerabilities — and explains every finding in plain English with clear remediation steps. Most vulnerability scanners are built for enterprise security teams with technical staff to interpret the results. Olimpio is different. Results are explained in plain English so business owners and non-technical managers can understand exactly what is wrong and how to fix it. Key features: external port scanning (standard and deep mode), DNS and email security checks (DMARC, SPF, DKIM), SSL certificate monitoring, HTTP security header analysis, GitHub secrets scanning for exposed API keys, Cyber Essentials control mapping (CE1–CE5), AI-generated plain-English finding explanations, PDF security reports, and security score tracking over time. Free tier available. Starter plan from £49/month. #### Who Is the Company Behind Olimpio Security? - **Seller:** [Olimpio Security](https://www.g2.com/sellers/olimpio-security) - **Year Founded:** 2025 - **HQ Location:** Manchester, GB - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=c8cb7282d5d92e79dbc47664eef441fa00bc2e77ed80a15baaeb211ee2e7f062&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Folimpio-security&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® - [‹ Prev‹ Prev](/categories/vulnerability-scanner/free?category_id=vulnerability-scanner&order=g2_score&page=4#product-list) - [1](/categories/vulnerability-scanner/free?category_id=vulnerability-scanner&order=g2_score#product-list) - [2](/categories/vulnerability-scanner/free?category_id=vulnerability-scanner&order=g2_score&page=2#product-list) - [3](/categories/vulnerability-scanner/free?category_id=vulnerability-scanner&order=g2_score&page=3#product-list) - [4](/categories/vulnerability-scanner/free?category_id=vulnerability-scanner&order=g2_score&page=4#product-list) - 5 - [6](/categories/vulnerability-scanner/free?category_id=vulnerability-scanner&order=g2_score&page=6#product-list) - [Next ›Next ›](/categories/vulnerability-scanner/free?category_id=vulnerability-scanner&order=g2_score&page=6#product-list) Spotlight Categories [Third Party & Supplier Risk Management Software](https://www.g2.com/categories/third-party-supplier-risk-management) [AI Writing Assistants](https://www.g2.com/categories/ai-writing-assistant) [Demand Side Platform (DSP)](https://www.g2.com/categories/demand-side-platform-dsp) [Corporate Performance Management (CPM) Software](https://www.g2.com/categories/corporate-performance-management-cpm) [Security Awareness Training Software](https://www.g2.com/categories/security-awareness-training) Similar Categories - [Static Code Analysis](/categories/static-code-analysis) - [Container Security](/categories/container-security-tools) - [Dynamic Application Security Testing (DAST)](/categories/dynamic-application-security-testing-dast) - [Interactive Application Security Testing (IAST)](/categories/interactive-application-security-testing-iast) - [Log Analysis](/categories/log-analysis) - [Penetration Testing](/categories/penetration-testing-tools) - [Secure Code Review](/categories/secure-code-review) - [Software Bill of Materials (SBOM)](/categories/software-bill-of-materials-sbom) - [Software Composition Analysis](/categories/software-composition-analysis) - [Static Application Security Testing (SAST)](/categories/static-application-security-testing-sast) - [Web Application Firewall (WAF)](/categories/web-application-firewall-waf) [Browse Vulnerability Scanner Themes](/categories/vulnerability-scanner/themes)