Email Collaboration Software

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.

Horde Groupware is a free, enterprise ready, browser based collaboration suite.

Work easier and boost your revenue and profits with Kirmada. This is how Workspaces are *meant* to be! Efficient, time-tracked, socially integrated and shareable. All with no learning curve.

Try for free paid Free Trial £19.95 / Monthly (Per User. Ask for multi-user discounts.)

End-to-end encrypted chat built into Keybase

Keep your conversations secure, everywhere.

Protect your privacy with unique email aliases

ZeroNet authentication provider

Spike turns email into simple conversations, so you can work and collaborate seamlessly with clients and team members - in a more natural way. Welcome to the future of email.

freemium

ZeroNet. Open, free and uncensorable websites, using Bitcoin cryptography and BitTorrent network. Download for Windows 9. 6MB · Unpack · Run ZeroNet. exe.

Encrypted text and voice chat for passionate communities

Super simple chat in your browser 💬

Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues

Airmail is a lightweight and lightning fast mail client for Mac.

Gmail is available across all your devices Android, iOS, and desktop devices. Sort, collaborate or call a friend without leaving your inbox.