Best Email Collaboration Products in 2025

FOSS Private Digital Workplace Email and Collaboration Platform.

Key Zextras Carbonio Community Edition features:

Private Digital Workplace Advanced e-mail management Calendars and events management Video Chats

Open Source free

Preferred Patron is the top Customer Loyalty Software Program for businesses in any industry of any size.

Key Preferred Patron features:

Marketing SMS Text Messaging Email Marketing Digital Rewards Management

Visit website paid $149.0 / Monthly (Small Biz Edition - White labeled (5,000 Active Member Limit))

A fully fledged, free email server solution, an open source project (GPL v2).

Key iRedMail features:

Open Source Comprehensive Features Easy Installation Excellent Documentation

Open Source

Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.

Key Zimbra features:

Open Source Cost-Effective Scalability Feature-Rich

An open source mailserver suite.

Key mailcow features:

Comprehensive Feature Set Open Source Docker-based Deployment Active Community and Support

Open Source

Spike's AI-first email helps you stay organized, respond faster, and boost productivity effortlessly. By turning email into chat, you can work and collaborate efficiently - with anyone. Welcome to the future of email.

Key Spike features:

Notes Chat Calendar Call Conferencing

freemium

Virtru is your data privacy force field, wrapping and protecting emails and files wherever they're shared. Easy-to-use data security software for business. People also askIs Virtru Hipaa compliant?

Key Virtru features:

Ease of Use End-to-End Encryption Access Controls Time-Based Access

NeoCertified is a solution that provides secure email encryption for businesses and organizations across all industries, including healthcare, finance, legal, non-profit and education.

Key NeoCertified Secure Email features:

Enhanced Security Compliance User-Friendly Interface Integration

Use Encyro to send sensitive messages and files to your customers and service providers, including accountants, loan officers, health coaches, and others. Stay organized and forward documents from your mobile device.

Key Encyro features:

Security Ease of Use Integration Compliance

As email is the preferred medium for business communications, preventing confidential information from being leaked in outbound email messages must be a top priority in order to lower the risk of a data breach.

Key Proofpoint Email Encryption features:

Data Protection Ease of Use Compliance Cloud-Based

ZeroNet authentication provider.

Key ZeroID features:

Decentralization Privacy Censorship Resistance Custom Identity System

Achieving email security with an end-to-end email encryption solution without impacting the user experience.

Key Micro Focus Voltage SecureMail features:

End-to-End Encryption User-Friendly Interface Compliance Support Flexible Deployment Options

Super simple chat in your browser 💬.

Key Zhoo features:

User-Friendly Interface Comprehensive Feature Set Cross-Platform Compatibility Real-Time Collaboration

SendSafely operates a zero knowledge, end-to-end encrypted file exchange platform.

Key SendSafely features:

End-to-End Encryption No File Size Limit Integration Capabilities User-Friendly Interface