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Top Rated Email Security Software with Encryption - Page 3

Last updated: April 2026

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76 software options

AVG Internet Security Business Edition logo

Cybersecurity platform for small and midsize businesses

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AVG Internet Security Business Edition is a complete protection solution that helps small and midsize businesses keep their systems and devices safe from external threats.

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MimeCast Email Security logo

Cloud-based email security and threat intelligence platform

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MimeCast Email Security is a cloud-based secure email gateway designed to help businesses in healthcare, IT, legal, financial services, manufacturing, and other industries protect conversations from malware, spam, ransomware, spear-phishing, and zero-day attacks. Supervisors can monitor, detect and remediate internal threats by inspecting internal emails for malicious attachments, links, or confidential information.

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DeliverySlip logo

Secure electronic signature, email encryption & file sharing

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DeliverySlip is a cloud-based email security, file sharing and electronic signature solution which offers industrial-grade email encryption, secure file transfer, electronic approvals, web forms, bulk send, and more. The software works inside Microsoft Outlook, Gmail, and various other applications.

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Graphus logo

Cloud-based email security software

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Graphus is a cloud-based anti-phishing software, which helps protect organizations against email attacks, credential theft, malware, ransomware, identity spoofing, brand impersonation, business email compromise (BEC), account takeover (ATO) and other threats.

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Inky logo

The most effective solution when fighting phishing attacks.

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INKY is an endpoint protection tool that helps businesses leverage artificial intelligence (AI) technology and machine learning capabilities to identify and prevent phishing attacks. INKY can be integrated with Microsoft Exchange, Google Workspace and other applications.

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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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eM Client logo

Email, calendar, contacts, tasks, notes and chat in one app

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eM Client is a powerful email client with a clean and easy-to-use interface, which supports PGP and S/MIME encryption and digital signatures. Upload and lookup GPG keys on eM Keybook, Proton and keys.openpgp.org. Password-protected startup. eM Client easily connects to any email service.

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Egress Protect logo

Email encryption and security platform

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Egress Protect is an email security software designed to help financial, healthcare, and government organizations streamline email encryption and file management operations. The application allows employees to handle data archiving, filtering, and storage operations via a unified platform.

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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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Zivver logo

Email Security Made Effortless

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Zivver is email security software which helps enterprises transfer business documents and ensure secure e-mail communication. It allows users to retract emails, view risks, causes, and impact of data breaches, configure workflows, and generate custom reports.

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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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Fidelis Network logo
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Fidelis' NDR: Proactive Defense, Rapid Threat Response.

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Fidelis Network, an NDR solution, delivers real-time threat detection & response. With Deep Session Inspection®, it provides full visibility into network, email, and web traffic, including encrypted data. Contextual analysis & threat intelligence reduce alert fatigue & enhance risk management.

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StartMail logo
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Email platform for end-to-end email encryption

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StartMail is a privacy-first email service that keeps your inbox safe. It is designed for individual and business use. StartMail users can create an unlimited number of email aliases at no extra cost to mask their real email. Custom email addresses are available for businesses.

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Data Krypter logo
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On-premise encryption software

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Data Krypter is an encryption software that protects data by encrypting files, folders, and text.

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StrongestLayer logo
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AI-native email security platform

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StrongestLayer’s AI Email Security leverages advanced Large Language Models to understand the true intent behind every message, instantly detecting and blocking sophisticated phishing, zero-day exploits, and BEC scams. Seamlessly integrated with Microsoft 365 and Google Workspace.

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Palisade logo
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Email security software

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Palisade is an AI-powered DMARC platform that automates the implementation of DMARC to help users stop landing in spam and get their verified email checkmark. The platform integrates with over 800 third-party apps and features smart DMARC capabilities, email threat detection, and expert human support to improve email deliverability and security.

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Advanced Threat Protection logo
(0)

Ransomware attack, phishing & CEO fraud protection software

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Hornetsecurity's Advanced Threat Protection software is designed to detect and protect enterprises from targeted attacks, ransomware, CEO & phishing fraud with features including a sandbox engine, URL scanning & rewriting, freezing, targeted fraud forensics, and more

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FileCap logo
(0)

Cloud-based email security and encryption solution

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FileCap is a secure file-sharing and collaboration solution that lets users send large files over email safely and easily.

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Confidencial logo
(0)

Cloud-based data protection and security solution

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Confidencial is a cloud-based document security solution that enables users to protect sensitive data with granular encryption controls.

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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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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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mxHERO for Legal QuickStart logo
(0)

Email security & productivity designed for legal firms

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Protect outbound email attachments by automatically replacing them with secure links to your existing cloud storage service. No end-user effort or downloads required. Works uniformly across all devices. Minimize your risk to external email breaches and email mishandling.

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EuropeanMX logo
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Cloud-based anti-spam for incoming and outgoing messages

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Use the cloud redundancy solution EuropeanMX as a reliable spam filter. Our system offers nearly 100% filter accuracy and virtually no false positives. Protect your IP ranges before getting blacklisted. Continuously archive your emails with EuropeanMX to always have a backup of your emails.

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MailGuard logo
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Speed Matters. MailGuard stops threats 2- 48hrs faster.

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MailGuard anticipates, predicts and learns from emerging zero-day threats like ransomware, phishing, spear-phishing, Business Email Compromise and similar malicious email-borne attacks, protecting email users from harm.

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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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