ToolVitals

Communication

💬

Team Chat

Team messaging, communities, and async communication tools.

74 tools tracked, 48 scored verdicts

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 overallMattermost97 scoreLicense-safe pickMattermostOSI-approved OSSFastest shippingMattermost97 shipping
slack vs discord

Use Case Rankings

Ordered by ToolVitals score, then health, shipping, confidence, GitHub stars, and name.

#ToolHealthShippingOpennessStarsScoreStatus
01Mattermost
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..
9897OSI-approved OSS39.5k97Active
02Rocket.Chat
The Secure CommsOS™ for mission-critical operations
9797OSI-approved OSS46.3k97Active
03Element
Enterprise communication platform
9797OSI-approved OSS13.6k97Active
04Haven Chat
Self-hosted private chat — No cloud, no telemetry, no Big Tech. Discord alternative that runs on your own machine.
9697OSI-approved OSS78396Active
05Cap
Open source Loom alternative. Beautiful, shareable screen recordings.
9695OSI-approved OSS24.1k96Active
06Chatmail Core
Core library for chatmail apps, bots, and bindings.
9695OSI-approved OSS94295Active
07Wire
📱 Wire for iOS (iPhone and iPad)
9695OSI-approved OSS16895Active
08Discourse
A platform for community discussion
9694OSI-approved OSS48k95Active
09Zulip
Zulip server and web application. Open-source team chat that helps teams stay productive and focused.
9694OSI-approved OSS26.1k95Active
10Frappe Gameplan
Open Source Discussions Platform for Remote Teams
9595OSI-approved OSS52395Active
11wacli
WhatsApp CLI
9594OSI-approved OSS2.9k95Active
12Quackback
Open source alternative to Canny, UserVoice, Productboard
9393OSI-approved OSS33193Active
13VACS
VATSIM ATC communication system.
9393OSI-approved OSS7093Active
14Gryt
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.
9196OSI-approved OSS3893Active
15nodyx
Self-hosted community platform with forum, chat, voice, and canvas.
9192OSI-approved OSS13791Active
16Fluxer
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.
8895OSI-approved OSS10.7k91Active
17adamant-im
ADAMANT Decentralized Messenger and Crypto Wallet. Progressive Web Application (PWA) for Web, Tor, Android, macOS, Windows, and Linux.
9289OSI-approved OSS79290Active
18Ethora
Open-source engine for chat 💬, AI assistants 🤖 & wallets 🪪. React, Typescript, Python, XMPP. Build future apps with chat, AI agents and web3.
9189OSI-approved OSS55290Active
19Lemmy
🐀 A decentralised discussion platform for communities.
9186OSI-approved OSS14.7k89Active
20Activist
Open-source activism platform.
9185OSI-approved OSS76589Active
21SimpleX Chat
SimpleX - the first messaging network operating without user identifiers of any kind - 100% private by design! iOS, Android and desktop apps 📱!
9086OSI-approved OSS19.6k89Active
22Mqvi
Open-source communication platform with voice, video, text, and screen sharing.
8591OSI-approved OSS2288Active
23Vexa
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.
8983OSI-approved OSS2.9k87Active
24Hackers Pub
ActivityPub-enabled social network for hackers.
8885OSI-approved OSS16787Active
25nChat
White-label team communication platform for Slack, Discord, or Telegram style chat.
8483OSI-approved OSS084Active
26HappyDeliver
Open-source email deliverability testing platform.
8381OSI-approved OSS23782Active
27WhippyTerm
Modern Serial Terminal
7974OSI-approved OSS9577Active
28Tinode
General instant messaging
7967OSI-approved OSS13.5k74Active
29Habitat
Free and open-source self-hosted social platform for local communities.
7567OSI-approved OSS15172Warning
30VoteKit
Open source membership plebiscite platform.
6663OSI-approved OSS065Warning
31Set Outlook Signatures
Data sovereign email signatures and out-of-office reply management.
6660OSI-approved OSS41563Warning
32Open IM
IM Chat OpenClaw
6750OSI-approved OSS16.7k60Warning
33QuoteVote
Nonprofit open-source platform to post, vote, and deliberate.
6750OSI-approved OSS3460Warning
34CBoard
Browser-based AAC communication board with text-to-speech.
7044OSI-approved OSS76659Warning
35Open Self Service
Open source composable frontend for customer portals.
6741OSI-approved OSS18656Warning
36agentgram
Open-source AI agent social network built with Next.js and Supabase.
6344OSI-approved OSS4256Warning
37Late.fyi
Email-driven train tracker with notifications by email or ntfy.
5946OSI-approved OSS054Warning
38Indic Subtitler
Open source subtitling platform for transcribing and translating videos and audio in Indic languages.
6043OSI-approved OSS9553Warning
39Tickotty
Open-source helpdesk ticketing system.
5335OSI-approved OSS146Warning
40Spacebar
📬 Spacebar is a free open source selfhostable discord compatible communication platform
5227OSI-approved OSS6.7k42Warning
41Majik Message
Post-quantum secure messaging platform.
4131OSI-approved OSS237Critical
42CajeerBots
Platform for launching, managing, and extending chat bots.
4716OSI-approved OSS035Critical
43Discuit
Open-source community discussion platform.
4617OSI-approved OSS55235Critical
44Circled
Video calls, chat, photo sharing, and community server platform.
3413OSI-approved OSS21125Critical
45Vanilla
A platform for community discussion
150OSI-approved OSS3k9Critical
46Deskive
Open-source workspace collaboration platform with chat, video calls, projects, files, calendar, notes, and AI tools.
150OSI-approved OSS309Critical
47NPMChat
Open-source real-time chat platform for developers and teams.
120OSI-approved OSS217Critical
48Weevean
Open-source team collaboration platform with real-time messaging, channels, and DMs.
110OSI-approved OSS136Critical

Evidence Watch

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

OpenPaaS

Open PaaS Enterprise Social Network

— confidence

Not Scored

Tracked for context, but excluded from rankings because comparable open/source-visible evidence is unavailable.

Campsite

Async team communication platform for remote and distributed teams.

ToolVitals does not score proprietary or unknown-license tools because their public source evidence is not comparable to open/source-visible projects.

Chativa

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

ToolVitals does not score proprietary or unknown-license tools because their public source evidence is not comparable to open/source-visible projects.

Discord

Voice and text chat for communities

ToolVitals does not score proprietary or unknown-license tools because their public source evidence is not comparable to open/source-visible projects.

Firma Sign

Peer-to-peer document signing tool.

ToolVitals does not score proprietary or unknown-license tools because their public source evidence is not comparable to open/source-visible projects.

Helpdesk

Open source helpdesk management application.

ToolVitals does not score proprietary or unknown-license tools because their public source evidence is not comparable to open/source-visible projects.

Mezon

Mezon is a new way to communicate with your team. It's faster, better organized, better for WFH.

ToolVitals does not score proprietary or unknown-license tools because their public source evidence is not comparable to open/source-visible projects.

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.

ToolVitals does not score proprietary or unknown-license tools because their public source evidence is not comparable to open/source-visible projects.

Pollmodoro

Open-source polling platform built with SvelteKit and Cloudflare Workers.

ToolVitals does not score proprietary or unknown-license tools because their public source evidence is not comparable to open/source-visible projects.

Quorum

Open-source platform for real-time polling, discussion, and visualization.

ToolVitals does not score proprietary or unknown-license tools because their public source evidence is not comparable to open/source-visible projects.

Slack

Business communication platform

ToolVitals does not score proprietary or unknown-license tools because their public source evidence is not comparable to open/source-visible projects.

SmartMenu

Open-source multi-tenant platform for building multilingual restaurant menus.

ToolVitals does not score proprietary or unknown-license tools because their public source evidence is not comparable to open/source-visible projects.

Twake

Twake is a secure open source collaboration platform to improve organizational productivity.

ToolVitals does not score proprietary or unknown-license tools because their public source evidence is not comparable to open/source-visible projects.

WhatsDesk

Open-source WhatsApp marketing and automation platform.

ToolVitals does not score proprietary or unknown-license tools because their public source evidence is not comparable to open/source-visible projects.