# Best Secure Email Gateway Software - Page 3 *By [Lauren Worth](https://research.g2.com/insights/author/lauren-worth)* Secure email gateways are comprehensive email security platforms designed to prevent web-based threats and ensure employee compliance. The gateways funnel incoming email content through spam filters and scan content prior to allowing transport beyond a firewall. These gateways include some kind of labeling or user governance system to identify malicious actors and prevent them from engaging in future communication. Archiving capabilities within secure email gateways help businesses keep a record of prior communications for both compliance and reference purposes. Businesses choose to adopt secure email gateway tools to add further security measures to both internal and outbound communications. Companies can prevent their network from being compromised by cybercriminals and their data from being stolen, as well as ensure their operations remain compliant. These tools do have overlap with both [email encryption software](https://www.g2.com/categories/email-encryption) and [email anti-spam software](https://www.g2.com/categories/email-anti-spam), but provide a more comprehensive platform. Secure email gateway platforms combine the capabilities of both tools and add supplementary security and archiving capabilities. To qualify for inclusion in the Secure Email Gateway category, a product must: - Filter or scan mail for viruses, spam, or other malware - Identify and block potentially dangerous content - Securely encrypt communications - Provide archiving capabilities for compliant storage - Facilitate allow and block lists to control approved versus suspicious accounts ## How Many Secure Email Gateway Software Products Does G2 Track? **Total Products under this Category:** 62 ### Category Stats (May 2026) - **Average Rating**: 4.44/5 - **New Reviews This Quarter**: 36 - **Buyer Segments**: Small-Business 57% │ Mid-Market 41% │ Enterprise 2% - **Top Trending Product**: Actamos Email Security (+0.066) *Last updated: May 18, 2026* ## How Does G2 Rank Secure Email Gateway Software Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 3,300+ Authentic Reviews - 62+ 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. ## Which Secure Email Gateway Software Is Best for Your Use Case? - **Leader:** [Proofpoint Core Email Protection](https://www.g2.com/products/proofpoint-core-email-protection/reviews) - **Highest Performer:** [Libraesva Email Security](https://www.g2.com/products/libraesva-email-security/reviews) - **Easiest to Use:** [Paubox](https://www.g2.com/products/paubox/reviews) - **Top Trending:** [Kiteworks](https://www.g2.com/products/kiteworks/reviews) - **Best Free Software:** [Proofpoint Core Email Protection](https://www.g2.com/products/proofpoint-core-email-protection/reviews) --- **Sponsored** ### IRONSCALES IRONSCALES is a cloud-native email security platform that helps enterprises and MSPs close gaps with mailbox-level detection, autonomous remediation, and built-in user training. It combines AI and human insights that continuously learn from user behavior, message context, and analyst feedback to identify advanced threats like BEC, account takeovers, impersonation, and other advanced phishing attacks. IRONSCALES is headquartered in Atlanta, Georgia and is proud to serve more than 17,000 customers globally. IRONSCALES leverages adaptive AI and its Agentic AI engine, Themis, to drive autonomous, mailbox-level remediation with customizable automation. Smart clustering, context-driven decisioning, and user-reported inputs enable Themis to remediate threats in real time while preserving analyst oversight and control. Designed for rapid deployment via API, IRONSCALES integrates with existing security stacks without requiring MX record changes. To reduce risk, improve SOC efficiency, and support a proactive security culture, its comprehensive capabilities also include: - Phishing Simulations - Security Awareness Training - DMARC management - Deepfake Live Protection - Generative AI tools [Visit website](https://www.g2.com/external_clickthroughs/record?secure%5Bad_program%5D=ppc&secure%5Bad_slot%5D=category_product_list&secure%5Bcategory_id%5D=1086&secure%5Bdisplayable_resource_id%5D=1833&secure%5Bdisplayable_resource_type%5D=Category&secure%5Bmedium%5D=sponsored&secure%5Bplacement_reason%5D=neighbor_category&secure%5Bplacement_resource_ids%5D%5B%5D=1833&secure%5Bplacement_resource_ids%5D%5B%5D=1628&secure%5Bprioritized%5D=false&secure%5Bproduct_id%5D=127324&secure%5Bresource_id%5D=1086&secure%5Bresource_type%5D=Category&secure%5Bsource_type%5D=category_page&secure%5Bsource_url%5D=https%3A%2F%2Fwww.g2.com%2Fcategories%2Fsecure-email-gateway%3Fpage%3D3&secure%5Btoken%5D=6bafc59481a3ac7d646101ee9683db11e17083277ce487f91d0375c64c1867fe&secure%5Burl%5D=https%3A%2F%2Fsecure.ironscales.com%2Fdemo%3Futm_source%3Dg2%26utm_medium%3Daffiliate%26utm_campaign%3Dg2-ads&secure%5Burl_type%5D=book_demo) --- ## What Are the Top-Rated Secure Email Gateway Software Products in 2026? ### 1. [Kaspersky Security for Mail Server](https://www.g2.com/products/kaspersky-security-for-mail-server/reviews) Kaspersky Security for Mail Server (KSMS) provides trusted and secure corporate email exchange, countering spam, email-borne infections, all forms of phishing, business email compromise (BEC), QR code attacks, and other threats. Kaspersky Security for Mail Server delivers multi-layered protection for the business’s primary communications channel — email — countering spam, malware, spoofing, all forms of phishing and other threats. Whether you use on-prem email tools or cloud, KSMS ensures secure corporate email exchange, helping reduce the risk of business disruption, financial losses and data leaks. - Fortify your email infrastructure defense Keep your business’s primary communications channel secure with a single product, powered by proactive detection, advanced content filtering and response. - Mitigate email-borne risks to your business Protect against all types of email threats and minimize the risk of disruption, financial loss and data leaks with a robust email security solution. - Ensure cost efficiency of your investments Benefit from three advanced mail security applications under a single license, with a flexible subscription model that helps you control and optimize costs. - Full protection for both cloud and on-prem Whether you use on-prem tools or cloud, select from our wide range of options - from secure email gateway to API-integrated on-prem or cloud-native email security **Who Is the Company Behind Kaspersky Security for Mail Server?** - **Seller:** [Kaspersky](https://www.g2.com/sellers/kaspersky-bce2dc7f-2586-4e87-96da-114de2c40584) - **Year Founded:** 1997 - **HQ Location:** Moscow - **Twitter:** @kasperskylabind (1,294 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/kaspersky/ (4,494 employees on LinkedIn®) - **Phone:** 1-866-328-5700 ### 2. [KeepKnown](https://www.g2.com/products/keepknown/reviews) KeepKnown is an allow-list email filter for Gmail, Outlook, and Microsoft 365. It automatically filters unknown senders out of your inbox without deleting them, ensuring you only see emails from people you know and trust. Google Verified with CASA Tier 2 security certification. The strict inbox filter that keeps your focus on what matters. **Who Is the Company Behind KeepKnown?** - **Seller:** [KeepKnown](https://www.g2.com/sellers/keepknown) - **HQ Location:** Dubai, AE - **LinkedIn® Page:** https://www.linkedin.com/company/92481619/ (1 employees on LinkedIn®) ### 3. [MailArmor](https://www.g2.com/products/mailarmor/reviews) MailArmor.ai is an AI-powered email security platform for SMBs in India. It integrates with Microsoft 365 in 5 minutes, complies with CERT-In & DPDP, and protects against phishing, malware, and BEC. **Who Is the Company Behind MailArmor?** - **Seller:** [Protecte Technologies ](https://www.g2.com/sellers/protecte-technologies) - **Year Founded:** 2023 - **HQ Location:** Greater Noida, IN - **LinkedIn® Page:** https://www.linkedin.com/company/protecte-technologies/ (15 employees on LinkedIn®) ### 4. [MailHippo](https://www.g2.com/products/mailhippo/reviews) MailHippo empowers users to start sending and receiving fully-encrypted emails and fillable, signable HIPAA compliant forms within minutes. Designed for ease of use, MailHippo works with any email provider, using your existing email address, with no setup or configuration required. It’s simple yet incredibly strong, with AES 256-bit end-to-end encryption, plus encrypted key rings, for industry-leading security both in transit and at rest. And it’s totally mobile friendly, working well on any smartphone or tablet. **Who Is the Company Behind MailHippo?** - **Seller:** [MailHIppo](https://www.g2.com/sellers/mailhippo) - **HQ Location:** Pompano Beach, US - **Twitter:** @MailHippoInc (6 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/mailhippo (2 employees on LinkedIn®) ### 5. [MailRoute](https://www.g2.com/products/mailroute/reviews) MailRoute is a secure, hosted email filtering service that you can have up and running in minutes without any hardware or software to install. **Who Is the Company Behind MailRoute?** - **Seller:** [MailRoute](https://www.g2.com/sellers/mailroute) - **Year Founded:** 2002 - **HQ Location:** Venice , US - **LinkedIn® Page:** https://www.linkedin.com/company/mailroute/ (8 employees on LinkedIn®) ### 6. [MetaDefender Email Security Solution](https://www.g2.com/products/metadefender-email-security-solution/reviews) OPSWAT MetaDefender Email Security provides key capabilities to advance organizations' email security posture to the maximum. Our goal is to protect organizations from email-initiated cyber attacks. **Who Is the Company Behind MetaDefender Email Security Solution?** - **Seller:** [OPSWAT](https://www.g2.com/sellers/opswat) - **Year Founded:** 2002 - **HQ Location:** Tampa, Florida - **Twitter:** @OPSWAT (7,252 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/opswat/ (1,124 employees on LinkedIn®) ### 7. [modusGate Email Security](https://www.g2.com/products/modusgate-email-security/reviews) A Powerful, On-Premise Email Security Gateway modusGate is a multi-layer anti-spam email filtering gateway harnessing 2 decades of experience. It incorporates state of the art AI through a real-time machine learning engine to effectively identify threats by reputation and advanced statistical models. We integrate layered scanning with Bitdefender and Avira Anti-Virus, providing leading defense against phishing and malware threats. The Protection You Need from Advanced Threats A multiple VBSpam+ award winner, modusGate offers affordable Anti-Spam, Anti-Malware, Targeted Phishing Protection and even our own directQuarantine Outlook Plugin. Its Artificial Intelligence Engine and real-time threat analysis catches over 99.5% of malicious emails with a 0% false positive rate (according to VBSpam tests), while also protecting you from look-alike domains and other popular methods of attack. Microsoft Email Security Solution for Outlook directQuarantine is a Microsoft Outlook plugin Vircom designed to give end-users total visibility and control over their quarantined messages and relieve IT administrators from day-to-day quarantine management. With directQuarantine users can view quarantined messages live, release false positives instantly, and sort and search emails with Outlook’s powerful search capabilities. DirectQuarantine supports MS Outlook 2016, 2013, 2010 and 2007. Reported spam is continually implemented into our algorithms providing updated protection. **Who Is the Company Behind modusGate Email Security?** - **Seller:** [Vircom](https://www.g2.com/sellers/vircom) - **Year Founded:** 1994 - **HQ Location:** Kirkland, CA - **Twitter:** @Vircom_Inc (599 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/vircom/ (40 employees on LinkedIn®) ### 8. [PineApp Mail Secure](https://www.g2.com/products/pineapp-mail-secure/reviews) Secure your business with total messaging control. PineApp Mail Secure stops the majority of malicious email threats at your network's perimeter while simultaneously providing a range of additional options for comprehensive security and messaging control. **Who Is the Company Behind PineApp Mail Secure?** - **Seller:** [CYBONET](https://www.g2.com/sellers/cybonet) - **Year Founded:** 2002 - **HQ Location:** Haifa, IL - **Twitter:** @Cybonet1 (78 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/pineapp/ (28 employees on LinkedIn®) ### 9. [Safely Open](https://www.g2.com/products/safely-open/reviews) Safely Open files, emails and web sites you don't trust **Who Is the Company Behind Safely Open?** - **Seller:** [Safely Open](https://www.g2.com/sellers/safely-open) - **HQ Location:** N/A - **Twitter:** @SafelyOpen (5 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/No-Linkedin-Presence-Added-Intentionally-By-DataOps (1 employees on LinkedIn®) ### 10. [SendGuard for Outlook](https://www.g2.com/products/sendguard-for-outlook/reviews) SendGuard for Outlook is an email data protection solution that detects and warns users of potential email threats before emails are sent out. It is used as a risk and compliance solution for outbound emails. **Who Is the Company Behind SendGuard for Outlook?** - **Seller:** [Standss](https://www.g2.com/sellers/standss) - **Year Founded:** 1995 - **HQ Location:** Suva, FJ - **LinkedIn® Page:** https://www.linkedin.com/company/standss-south-pacific-limited (14 employees on LinkedIn®) ### 11. [SonicWall Hosted Email Security](https://www.g2.com/products/sonicwall-hosted-email-security/reviews) Email is the most common threat vector used by cyber criminals. Deploy the cloud-based service that protects your organization from advanced email threats such as targeted phishing attacks, ransomware, business email compromise (BEC) and email fraud. SonicWall solution reduces administrative overhead through easy deployment, management and reporting. **Who Is the Company Behind SonicWall Hosted Email Security?** - **Seller:** [SonicWall](https://www.g2.com/sellers/sonicwall) - **Year Founded:** 1991 - **HQ Location:** Milpitas, CA - **Twitter:** @SonicWall (29,304 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/4926/ (1,951 employees on LinkedIn®) ### 12. [WordSecure Messaging](https://www.g2.com/products/wordsecure-messaging/reviews) WordSecure is simple, HIPAA and business-grade software for sharing encrypted files and secure messages with anyone. **Who Is the Company Behind WordSecure Messaging?** - **Seller:** [WordSecure Messaging](https://www.g2.com/sellers/wordsecure-messaging) - **HQ Location:** N/A - **LinkedIn® Page:** https://www.linkedin.com/company/No-Linkedin-Presence-Added-Intentionally-By-DataOps (1 employees on LinkedIn®) ## What Is Secure Email Gateway Software? [Email Security Software](https://www.g2.com/categories/email-security) ## What Software Categories Are Similar to Secure Email Gateway Software? - [Email Encryption Software](https://www.g2.com/categories/email-encryption) - [Email Anti-spam Software](https://www.g2.com/categories/email-anti-spam) - [Cloud Email Security Solutions](https://www.g2.com/categories/cloud-email-security)