Team Chat Tools | ToolVitals

Best Team Chat tools by public signals

These picks are computed from scored public evidence. Use the openness column in the ranking to separate OSI-approved, source-available, open-core, proprietary, and unverified-license tools.

Best overallRocket.Chat100 score License-safe pickRocket.ChatOSI-approved OSS Fastest shippingRocket.Chat100 shipping

Use Case Rankings

Ordered by ToolVitals score, health, shipping, confidence, and then adoption as a tie-breaker.

#	Tool	Health	Shipping	Openness	Stars	Score	Status
01	Rocket.Chat The Secure CommsOS™ for mission-critical operations	100	100	OSI-approved OSS	45.9k	100	Active
02	Mattermost Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..	100	100	OSI-approved OSS	38.6k	100	Active
03	Element Enterprise communication platform	96	100	OSI-approved OSS	13.3k	98	Active
04	Discord Voice and text chat for communities	98	90	Proprietary target	—	93	Active
05	Vexa Open-source meeting transcription API for Google Meet, Microsoft Teams & Zoom. Auto-join bots, real-time WebSocket transcripts, MCP server for AI agents. Self-host or use hosted SaaS.	87	95	OSI-approved OSS	2.6k	93	Active
06	Haven Chat Self-hosted private chat — No cloud, no telemetry, no Big Tech. Discord alternative that runs on your own machine.	89	98	OSI-approved OSS	508	92	Active
07	Discourse A platform for community discussion	91	83	OSI-approved OSS	47.6k	91	Active
08	Cap Open source Loom alternative. Beautiful, shareable screen recordings.	84	90	OSI-approved OSS	20.4k	90	Active
09	agentgram Open-source AI agent social network built with Next.js and Supabase.	79	95	OSI-approved OSS	32	90	Active
10	Lemmy 🐀 A decentralised discussion platform for communities.	91	76	OSI-approved OSS	14.5k	89	Active
11	Zulip Zulip server and web application. Open-source team chat that helps teams stay productive and focused.	89	80	OSI-approved OSS	25.6k	89	Active
12	SimpleX Chat SimpleX - the first messaging network operating without user identifiers of any kind - 100% private by design! iOS, Android and desktop apps 📱!	94	66	OSI-approved OSS	19.1k	87	Active
13	nodyx Self-hosted community platform with forum, chat, voice, and canvas.	77	90	License unknown	97	85	Active
14	VACS VATSIM ATC communication system.	72	84	OSI-approved OSS	67	82	Warning
15	Natively Natively - Free open-source AI interview copilot & meeting assistant. The best Cluely alternative, Final Round AI alternative, and Interview Coder alternative. Real-time transcription, undetectable stealth mode, local RAG, BYOK. No subscriptions. No data breaches.	74	75	License unknown	2.1k	80	Warning
16	nChat White-label team communication platform for Slack, Discord, or Telegram style chat.	73	73	OSI-approved OSS	0	80	Warning
17	VoteKit Open source membership plebiscite platform.	72	72	License unknown	0	77	Warning
18	Open Self Service Open source composable frontend for customer portals.	77	51	OSI-approved OSS	179	75	Warning
19	Activist Open-source activism platform.	74	59	OSI-approved OSS	718	71	Warning
20	Tinode General instant messaging	67	49	OSI-approved OSS	13.4k	68	Warning
21	Majik Message Post-quantum secure messaging platform.	65	40	OSI-approved OSS	2	66	Warning
22	adamant-im ADAMANT Decentralized Messenger and Crypto Wallet. Progressive Web Application (PWA) for Web, Tor, Android, macOS, Windows, and Linux.	63	10	OSI-approved OSS	786	55	Warning
23	QuoteVote Nonprofit open-source platform to post, vote, and deliberate.	58	28	OSI-approved OSS	34	54	Warning
24	WhatsDesk Open-source WhatsApp marketing and automation platform.	54	14	License unknown	48	49	Warning
25	Weevean Open-source team collaboration platform with real-time messaging, channels, and DMs.	41	0	OSI-approved OSS	13	40	Critical
26	Twake Twake is a secure open source collaboration platform to improve organizational productivity.	38	0	OSI-approved OSS	1.9k	40	Critical
27	Colanode Open-source and local-first Slack and Notion alternative that puts you in control of your data	35	4	OSI-approved OSS	5k	38	Critical
28	SmartMenu Open-source multi-tenant platform for building multilingual restaurant menus.	33	11	License unknown	3	38	Critical
29	Spacebar 📬 Spacebar is a free open source selfhostable discord compatible communication platform	32	0	OSI-approved OSS	6.7k	38	Critical
30	Clatter Open-source chatting platform for workplaces.	28	0	OSI-approved OSS	8	35	Critical
31	Kap An open-source screen recorder built with web technology	33	0	OSI-approved OSS	19.3k	33	Critical
32	OpenPaaS Open PaaS Enterprise Social Network	28	0	OSI-approved OSS	486	33	Critical
33	OpenStreamPoll Open-source live polling platform for streamers.	26	0	OSI-approved OSS	22	32	Critical
34	Linen Slack alternative for communities with searchable content.	27	0	OSI-approved OSS	2.8k	31	Critical
35	Glimesh Open-source live streaming platform.	28	0	OSI-approved OSS	492	30	Critical
36	IndiePubStack Open-source publishing platform for developers.	26	0	OSI-approved OSS	17	29	Critical
37	Pollmodoro Open-source polling platform built with SvelteKit and Cloudflare Workers.	23	0	License unknown	3	29	Critical
38	Quorum Open-source platform for real-time polling, discussion, and visualization.	23	0	License unknown	1	29	Critical

Evidence Watch

Tracked tools with useful public signals but no verdict score yet.

CajeerBots

Platform for launching, managing, and extending chat bots.

86 confidence

Campsite

Async team communication platform for remote and distributed teams.

54 confidence

CareSync

Open-source healthcare communication platform for doctors, pharmacists, and patients.

77 confidence

CBoard

Browser-based AAC communication board with text-to-speech.

98 confidence

Chativa

Self-hosted end-to-end encrypted messaging platform for SMEs.

94 confidence

Chatmail Core

Core library for chatmail apps, bots, and bindings.

85 confidence

Circled

Video calls, chat, photo sharing, and community server platform.

62 confidence

Deskive

Open-source workspace collaboration platform with chat, video calls, projects, files, calendar, notes, and AI tools.

69 confidence

Discuit

Open-source community discussion platform.

71 confidence

Ethora

Open-source engine for chat 💬, AI assistants 🤖 & wallets 🪪. React, Typescript, Python, XMPP. Build future apps with chat, AI agents and web3.

100 confidence

Fluxer

A free and open source instant messaging and VoIP platform built for friends, groups, and communities. Self-hosting and more activity in this repository is coming very soon! See the README.

94 confidence

Frappe Gameplan

Open Source Discussions Platform for Remote Teams

89 confidence

Gryt

Monorepo for the Gryt voice chat platform — a self-hostable, WebRTC-based voice communication app with a desktop client, signaling server, SFU, and Keycloak auth.

94 confidence