Spectrum Chat Alternatives

A messaging app for teams who see through the Earth!

handy and feature-rich enterprise multi-device messenger available for server or cloud – Slack-like, but not Slack-limited

A desktop chat client for Discord and Slack

Live life unlimited. Free video meetings and team messaging in one app that works the way you do.

Mattermost is an open source alternative to Slack.

Step up your game with a modern voice & text chat app. Crystal clear voice, multiple server and channel support, mobile apps, and more.

FreeLists provides the internet community with Free, no-hassle, high-quality mailing lists

Smoothly Share Content Between Devices!

Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.

freemium $12.5 / Monthly (Per user - Business Class)

Email and web based discussion group software, includes archiving, emails, wiki, polls, file...

Microsoft Teams provides the enterprise-level security, compliance and management features you expect from Office 365, including broad support for compliance standards, and eDiscovery and legal hold for channels, chats, and files.

Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.

Crust Messaging is a secure, high performance, open source Slack alternative that allows your teams...