Teams comparing Team Chat Tools in June 2026 are not just choosing a chat window; the set includes adjacent communication systems for voice, video, collaboration, support, and self-hosted community interaction. ToolVitals data ranks 27 open/source-visible tools using health, shipping, openness, licensing, GitHub stars, and an overall ToolVitals score, with scores ranging from 92 for FS PBX to 28 for Input Right.
This ranking is limited to open/source-visible tools and is ordered by ToolVitals score first, with GitHub stars used only as a secondary popularity signal when scores are tied. Every listed tool in this dataset is labeled OSI-approved OSS, and the license labels are reported exactly as provided rather than treating source visibility as the same thing as open source.
Rankings
| Rank | Tool | Openness | License | Health | Shipping | GitHub Stars | Score | Status |
|---|---|---|---|---|---|---|---|---|
| 1 | FS PBX | OSI-approved OSS | Apache-2.0 | 85 | 95 | 197 | 92 | 🟢 Excellent |
| 2 | CryptPad | OSI-approved OSS | AGPL-3.0 | 90 | 87 | 7695 | 91 | 🟢 Excellent |
| 3 | Kamailio | OSI-approved OSS | GPL-2.0 | 87 | 89 | 2837 | 91 | 🟢 Excellent |
| 4 | Wire | OSI-approved OSS | GPL-3.0 | 88 | 89 | 155 | 91 | 🟢 Excellent |
| 5 | Owncast | OSI-approved OSS | MIT | 81 | 77 | 11307 | 85 | 🟢 Excellent |
| 6 | nChat | OSI-approved OSS | MIT | 72 | 71 | 0 | 79 | 🟢 Good |
| 7 | Mailu | OSI-approved OSS | MIT | 81 | 58 | 7299 | 76 | 🟢 Good |
| 8 | Activist | OSI-approved OSS | AGPL-3.0 | 74 | 65 | 693 | 73 | 🟢 Good |
| 9 | Mirotalk | OSI-approved OSS | AGPL-3.0 | 64 | 63 | 3001 | 70 | 🟢 Good |
| 10 | OpenCom | OSI-approved OSS | GPL-3.0 | 44 | 34 | 5 | 54 | 🟡 Fair |
| 11 | Card | OSI-approved OSS | AGPL-3.0 | 56 | 4 | 407 | 49 | 🟡 Fair |
| 12 | Spacebar | OSI-approved OSS | AGPL-3.0 | 43 | 7 | 6674 | 45 | 🟡 Fair |
| 13 | Wechaty | OSI-approved OSS | Apache-2.0 | 44 | 0 | 22822 | 41 | 🟡 Fair |
| 14 | CloudMeet | OSI-approved OSS | MIT | 41 | 7 | 489 | 40 | 🟡 Fair |
| 15 | Twake | OSI-approved OSS | AGPL-3.0 | 38 | 0 | 1921 | 39 | 🔴 Needs Attention |
| 16 | LimeJourney | OSI-approved OSS | AGPL-3.0 | 41 | 0 | 130 | 39 | 🔴 Needs Attention |
| 17 | Uninbox | OSI-approved OSS | AGPL-3.0 | 36 | 0 | 1743 | 37 | 🔴 Needs Attention |
| 18 | Echokit Server | OSI-approved OSS | GPL-3.0 | 30 | 0 | 586 | 36 | 🔴 Needs Attention |
| 19 | Chaskiq | OSI-approved OSS | AGPL-3.0 | 31 | 0 | 3527 | 34 | 🔴 Needs Attention |
| 20 | Helpy | OSI-approved OSS | MIT | 36 | 0 | 2482 | 34 | 🔴 Needs Attention |
| 21 | OpenPaaS | OSI-approved OSS | AGPL-3.0 | 28 | 0 | 485 | 33 | 🔴 Needs Attention |
| 22 | Indic Subtitler | OSI-approved OSS | MIT | 26 | 0 | 93 | 33 | 🔴 Needs Attention |
| 23 | Wavelength | OSI-approved OSS | MIT | 24 | 0 | 4 | 32 | 🔴 Needs Attention |
| 24 | OpenCircle | OSI-approved OSS | AGPL-3.0 | 22 | 7 | 107 | 30 | 🔴 Needs Attention |
| 25 | Telegram Support Bot | OSI-approved OSS | GPL-3.0 | 28 | 0 | 606 | 29 | 🔴 Needs Attention |
| 26 | ViMbAdmin | OSI-approved OSS | GPL-3.0 | 28 | 0 | 485 | 29 | 🔴 Needs Attention |
| 27 | Input Right | OSI-approved OSS | Apache-2.0 | 21 | 0 | 37 | 28 | 🔴 Needs Attention |
Top 3 Highlights
FS PBX ranks first with a 92 ToolVitals score, built from a 95 shipping score and 85 health score.
CryptPad ranks second with a 91 ToolVitals score, a 90 health score, and an 87 shipping score. Among the 91-point tools, it has the largest GitHub footprint with 7,695 stars, and its description points to collaborative office work with end-to-end encryption. It is labeled OSI-approved OSS with an AGPL-3.0 license_label.
Kamailio also scores 91, with an 87 health score and 89 shipping score. Its 2,837 GitHub stars make it the second-highest-starred tool among the 91-point group, and the supplied description positions it as a SIP server for VoIP and real-time communication platforms. It is labeled OSI-approved OSS with a GPL-2.0 license_label.
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