Rocket.Chat is an open-source communications platform for secure team messaging, channels, DMs, voice/video, integrations, and customer omnichannel support.
46k stars13.8k forkslast commit Actively maintained
11 self-hosted Pumble alternatives
Team chat and collaboration SaaS offering channels, direct messages, file sharing, and third-party integrations to enable real-time workplace messaging and coordination.
Alternatives to Pumble
Open-source, self-hosted messaging platform for secure team collaboration with real-time chat, audio calls, screen sharing, and integrations.
38.9k stars8.9k forkslast commit Actively maintained
#3
Open-source team chat server with topic-based threading for focused, asynchronous, and real-time communication in distributed teams.
25.8k stars10.1k forksApache-2.0last commit Actively maintained
#4
Element is a Matrix client for secure team messaging and collaboration, offering end-to-end encrypted chats and calls with interoperability across the Matrix network.
13.4k stars2.7k forksAGPL-3.0last commit Actively maintained
#5
Spacebar is an open source, self-hostable Discord-compatible communication platform with text chat, voice, and video, designed to work with existing clients and bots.
6.7k stars222 forksAGPL-3.0last commit Actively maintained
#6
Tailchat is an open source team chat and collaboration platform with a strong plugin system, bot integrations, multi-group workspaces, and RBAC permissions.
3.6k stars397 forksApache-2.0last commit Actively maintained
Stoat (formerly Revolt) is an open-source chat platform for communities and teams with channels, direct messages, roles/permissions, moderation tools, and bot support.
2.6k stars296 forksAGPL-3.0last commit Actively maintained
#8
Movim is a federated social platform and web-based XMPP client for blogging, chat, communities, and real-time messaging with a responsive cross‑platform interface.
2k stars281 forksAGPL-3.0last commit Actively maintained
#9
SAMA is a Node.js-based open-source chat server using uWebSockets.js, MongoDB and Redis, providing WebSocket/HTTP APIs, E2EE, clustering, and web/mobile clients.
158 stars15 forksGPL-3.0last commit Actively maintained
#10
A single-binary, low-resource Matrix homeserver in Rust; simple setup, RocksDB (default) or SQLite backends, built with axum and Ruma.
Activity unknown
#11
Libervia is a modular XMPP-based communication suite offering chat, microblogging, file sharing, and other social features across web, desktop, and CLI interfaces.
Activity unknown
What replacing Pumble actually involves
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 9 of 11 shipped a commit in the last six months. Licences in this list: Apache-2.0, AGPL-3.0, GPL-3.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Team Chat & Messaging.
