Best Team Chat & Messaging (2026)
Real-time messaging and collaboration for teams.
Team chat platforms are where work conversations happen. The open and self-hostable options here give you full control over message history, integrations, and data residency — important for regulated industries or anyone who would rather not hand their internal communications to a third party.
Switching from a specific tool?
Open-source team chat and omnichannel customer messaging platform.
Open sourceSelf-hostFree / self-hostMIT42k★
- MIT license with a large feature set available for free on self-hosted installs
- Omnichannel capabilities blend internal chat and external customer communications
- JavaScript/Meteor stack can be resource-intensive compared to lighter alternatives
Open-source, self-hosted team messaging built for security-conscious and DevOps teams.
Open sourceSelf-hostFree / self-hostMIT / Open-core32k★
- Full data sovereignty — runs on your own servers with no vendor access
- MIT-licensed core is free to self-host with no seat caps
- UI and mobile experience lag behind Slack's polish
Cloud-hosted team messaging and channels platform, owned by Salesforce.
Proprietaryfrom $7.25/moProprietary
- Best-in-class UX and near-universal adoption makes onboarding new hires trivial
- Enormous app ecosystem covers almost every SaaS integration
- Per-user billing escalates steeply as headcount grows
Top comparisons
FAQ
What is the best team chat & messaging tool?
Rocket.Chat is a top pick: Open-source team chat and omnichannel customer messaging platform.
Are there free or open-source team chat & messaging tools?
Yes — Rocket.Chat, Mattermost are open source and most can be self-hosted.