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20 listings are ranked by release freshness and adoption until verified reviews arrive; then review quality, volume and vendor responsiveness join the score. Open any row to see its receipt. See the formula
- 7 fresh released in the last 90 days
- 0 aging no release for 90 to 179 days
- 1 stale no release for 180 days or more
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Jitsi Meet
WebRTC video conferencing application that can be self-hosted and used from the browser or mobile apps.
Updated 48 days ago1 91.8 =Show how this rank is calculated
Rank receipt: Jitsi Meet#27 overall · #1 in category91.8/100- Platform readiness +40.0 100.0 × 40%
- Release freshness +33.1 94.6 × 35%
- Adoption signals +18.6 74.6 × 25%
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Zulip
Organized team chat app with unique email-style threading to keep conversations on topic.
Updated 87 days ago2 81.4 =Show how this rank is calculated
Rank receipt: Zulip#94 overall · #2 in category81.4/100- Platform readiness +34.0 85.0 × 40%
- Release freshness +29.0 83.0 × 35%
- Adoption signals +18.4 73.6 × 25%
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Mattermost
Self-hosted team messaging platform with channels, threads, integrations and playbooks.
Updated 50 days ago3 80.0 =Show how this rank is calculated
Rank receipt: Mattermost#114 overall · #3 in category80.0/100- Platform readiness +28.0 70.0 × 40%
- Release freshness +32.9 94.0 × 35%
- Adoption signals +19.1 76.5 × 25%
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Nextcloud Server
Self-hosted file sync and sharing platform with calendar, contacts and collaboration apps.
Updated 51 days ago4 79.8 =Show how this rank is calculated
Rank receipt: Nextcloud Server#120 overall · #4 in category79.8/100- Platform readiness +28.0 70.0 × 40%
- Release freshness +32.8 93.7 × 35%
- Adoption signals +19.0 76.1 × 25%
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Rocket.Chat
Communications platform that securely connects teams, customers, and partners via chat, voice and video.
Updated 57 days ago5 79.6 =Show how this rank is calculated
Rank receipt: Rocket.Chat#126 overall · #5 in category79.6/100- Platform readiness +28.0 70.0 × 40%
- Release freshness +32.2 91.9 × 35%
- Adoption signals +19.4 77.7 × 25%
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Synapse
Matrix homeserver written in Python for hosting decentralized, federated chat.
Updated 51 days ago6 76.1 =Show how this rank is calculated
Rank receipt: Synapse#167 overall · #6 in category76.1/100- Platform readiness +28.0 70.0 × 40%
- Release freshness +32.8 93.7 × 35%
- Adoption signals +15.3 61.1 × 25%
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Discourse
Modern open source discussion platform built for the next decade of the Internet.
Updated 72 days ago7 74.1 =Show how this rank is calculated
Rank receipt: Discourse#181 overall · #7 in category74.1/100- Platform readiness +24.0 60.0 × 40%
- Release freshness +30.6 87.5 × 35%
- Adoption signals +19.5 78.0 × 25%
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Cal.com
Scheduling infrastructure for everyone, open source alternative to Calendly with granular control.
Stale: 249 days without a release8 55.6 =Show how this rank is calculated
Rank receipt: Cal.com#240 overall · #8 in category55.6/100- Platform readiness +24.0 60.0 × 40%
- Release freshness +12.1 34.6 × 35%
- Adoption signals +19.5 78.1 × 25%
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Chanty
Chanty is a team chat app with unlimited message history, group calls, task boards and file storage for small teams.
No dated release history published9 40.0 =Show how this rank is calculated
Rank receipt: Chanty#305 overall · #9 in category40.0/100- Platform readiness +40.0 100.0 × 40%
- Release freshness +0.0 0.0 × 35%
- Adoption signals +0.0 0.0 × 25%
Data from Advisor (AI agent) Last sync Computed on Sponsorship weight 0%, never counted Read the full formula -
Discord
Voice, video and text communication service for gaming communities, developer groups, study servers and friends.
No dated release history published10 40.0 =Show how this rank is calculated
Rank receipt: Discord#322 overall · #10 in category40.0/100- Platform readiness +40.0 100.0 × 40%
- Release freshness +0.0 0.0 × 35%
- Adoption signals +0.0 0.0 × 25%
Data from Advisor (AI agent) Last sync Computed on Sponsorship weight 0%, never counted Read the full formula