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Email Security Software with API (2026) - Page 2

Last updated: April 2026

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64 software options

Abusix Mail Intelligence logo
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Cloud-based email security platform

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Abusix Mail Intelligence is an automated, cloud-based protection suite that enables businesses and organizations to protect their sensitive data from cyber-attacks. It protects users' mail servers and customers' inboxes from spam by orchestrating and automating your full security response including detecting malware and virus through machine learning techniques.

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Mailinblack logo

Cloud-based & on-premise email protection software

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Mailinblack is a cloud-based and on-premise email protection software, which helps organizations check incoming emails for spam or viruses and automatically sort them in inboxes. Features include anti-spear phishing, newsletter categorization, notifications, reporting and analytics.

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SpamHero logo

Saving the world from spam, one domain at a time!

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SpamHero is a cloud-hosted spam filtering solution available. Stop the spam, viruses, and phishing attacks before they reach your network.

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Stalwart logo
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Open-source mail and collaboration platform

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Stalwart Mail Server is an open-source email platform combining collaboration tools and security features in one unified solution.

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MeSign logo
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End-to-End encryption and digital signature app for emails.

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Provides email encryption, digital signing and timestamping service for your corporate emails.

Auto-configure email certificates, encrypt email message automatically by default with S/MIME standard.

Cloud and on-premise key management are both supported.

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SpamTitan logo

Anti-spam filter for business email. Vital email security.

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SpamTitan blocks spam, viruses, malware, ransomware, phishing attempts and other email threats. SpamTitan provides advanced yet easy to use email security for your business. Office 365 friendly

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Mimecast Awareness Training logo

Training system for educating employees on phishing attacks

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Mimecast Awareness Training is designed to help businesses train employees to identify and report phishing attacks and malicious emails. The application allows teams to assign video-based training modules about various types of threats, impacts, and measures to employees and enhance user engagement.

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Area 1 logo
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Secure email gateway and anti-spam software

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Area 1 Horizon is a network security management software designed to help businesses protect systems against phishing attacks across various traffic sources including emails, web pages, and networks. The platform enables administrators to receive notifications about blocked phishing campaigns on a unified interface.

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Cynet 360 logo

Automated breach response and protection platform

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Cynet 360 is an all-in-one security platform that provides endpoint threat detection and response for networks that require advanced protection. It gives network administrators visibility over all networked devices, users, and events. Cyber security technology is viable for companies of all sizes.

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NeoCertified logo

Secure email for confidential & sensitive documents

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NeoCertified provides secure email encryption with Outlook integration for businesses of all industries, including healthcare, finance, legal & education

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Kiteworks logo

Content Governance, Compliance, and Protection

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Protect privacy and ensure compliance of all sensitive content sent via email, file share, automated file transfer, APIs, and web forms - with one platform.

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modusCloud logo

Cloud email security, encryption, and archiving

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modusCloud is a cloud email security solution with tools for spam detection, threat monitoring, email archiving, phishing detection, and more. The cloud-based platform offers features including filtering, continuity, encryption, and archiving in order to provide businesses with email protection.

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SendGrid logo

Delivers reliable email at scale for businesses

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SendGrid is a solution that provides a cloud-based email infrastructure to help relieve businesses of the cost and complexity of maintaining custom email systems. It provides email delivery, scalability and real-time analytics along with APIs. The platform also offers SMTP service, email validation, deliverability insights, and dynamic templates, while supporting multiple programming languages including Node.js, Python, and Java.

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MxToolbox Delivery Center logo

Email monitoring solution for marketing and IT teams

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MxToolbox Delivery Center is a cloud-based email monitoring solution, that assists marketing teams with tracking email deliverability & monitoring domain health. Features include analytics, SMTP diagnostics, header analysis, response management, threat investigation, server monitoring, & reporting.

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Darktrace logo

AI-enabled network and cybersecurity solution

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Darktrace, founded in 2013 in Cambridge, UK, is a leader in AI cybersecurity, protecting 10,000+ global customers from evolving threats

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RMail logo

RMail®, track, prove, encrypt, e-sign, certify, all-in-one.

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RMail® is the e-security platform by RPost®. RMail specializes in elegantly easy to use email encryption for privacy and compliance, e-signatures, legal e-delivery proof, secure file sharing, email impostor protection, and AI-infused services to prevent data leaks and human e-security errors.

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Dark Web ID logo

Threat detection and monitoring for businesses and MSPs

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Dark Web ID is a cloud-based cybersecurity tool, which monitors the dark web and alerts businesses to any risks or threats. The platform can be used by MSPs or enterprises to prevent data breaches and ensure sensitive employee or company data is not available on the dark web.

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Zoho Mail logo

Zoho Mail is a secure, encrypted, and enterprise-ready email

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Zoho Mail, a business-oriented and privacy-guaranteed email service, is your single email solution. Zoho Mail also comes bundled with modern collaborative tools and a suite of apps to meet your business needs. Migrate now and get your unique email address with Zoho Mail.

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iQ.Suite aaS logo
(0)

Enterprise email management & security solution for M365

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iQ.Suite aaS is a cloud-based enterprise email management and security solution for companies using Microsoft 365. It offers a comprehensive set of features including content-driven encryption, insider threat detection, wrong recipient protection, and more. iQ.Suite aaS offers malware and spam detection to minimize risk and secure emails from unauthorized access. Additionally, to ensure company policies are met, this solution can be used to apply business policies to email communications.

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Proofpoint Email Protection logo

Secure email gateway management and threat intelligence tool

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Proofpoint Email Protection is a computer security management software designed to help businesses identify and block threats using AI-enabled tools. It offers an advanced business email compromise (BEC) defense feature, which enables administrators to analyze various attributes including message header and senders’ IP address.

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Trustifi logo

Protect Your Business Emails with AI-Powered Security

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Email security solution that helps manage threat detection, regulatory compliance, data encryption, whitelisting/blacklisting, and more.

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Paubox Email Suite logo

HIPAA-compliant email encryption software

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Paubox Email Suite is a HIPAA-compliant email encryption software designed to help businesses manage and secure emails using encryption and data loss prevention methods. It includes ExecProtect, which allows businesses to prevent data breaches, phishing, and display name spoofing attacks by automatically detecting and blocking impersonation scams and informing administrators via emails.

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mailbox logo
(0)

Secure encrypted email and workspace platform

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Mailbox provides a comprehensive digital workspace combining secure email, cloud storage, video conferencing, and office tools in one integrated platform. The service stores data in certified German data centers with consistent encryption during storage and transmission, ensuring GDPR compliance and enhanced security. Users benefit from spam-free inboxes, collaborative tools, and an infrastructure powered by renewable energy.

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BooleBox logo

Secure file sharing and data protection platform

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Boolebox is a cloud-based and on-premise data protection platform designed to help organizations across finance, research, healthcare, IT and various other sectors archive, synchronize, and securely share data across multiple devices.

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Conecta Suite logo

Manage your company's Google and Microsoft users all in one

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Conecta Suite is the ideal solution for those looking to maximize the potential of Google Workspace and boost team productivity. With features that make management more efficient and secure, it offers advanced and customized control to meet your company's specific needs.

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