Mastodon
Alternative to Social network/ Micro-blogging
Federated microblogging server.
Actively maintained
Real momentum
AGPL-3.0
Platform for secure collaboration across the entire software development lifecycle, can be integrated with Gitlab (alternative to Slack).
Mattermost is an open-source communication project, with 39k GitHub stars and a health score of 100/100. It committed 1882 times in the last twelve months across 12 of those months, and its status is actively maintained. Licence: ⊘ Proprietary. It has real momentum, so treat it as a live competitor rather than a stale repository.
| Status | Actively maintained — Committed within the last 45 days. |
|---|---|
| Last commit | 2026-08-15 |
| Days since last commit | 2 |
| Commits, last 3 months | 486 |
| Commits, last 12 months | 1882 |
| Months with activity | 12 of 12 |
| Last release | 2026-08-13 |
| Archived | No |
| Licence | ⊘ Proprietary |
| Category | Communication |
Health score combines commit recency, twelve-month commit volume, months with activity, release recency and archive state. Metadata refreshed August 2026.
Non-standard or mixed licensing. Check the repository before commercial use.
This matters most when you plan to sell a hosted version. A permissive licence means anyone — including a competitor with more capital — can do the same, so your defensibility has to come from distribution, support or data, not from the code.
Mattermost is shipping code consistently, so a buyer comparing your product will find a maintained free option. Price and position against the total cost of self-hosting it, not against the paid incumbent's list price.
Assume every prospect can find a free version in five minutes. Your wedge has to be something open source structurally cannot deliver: compliance, support SLAs, managed hosting at scale, or a workflow the maintainers refuse to build.
Actively maintained. Mattermost recorded 1882 commits over the last twelve months, with activity in 12 of those months and 486 commits in the last quarter. Last commit: 2026-08-15. Last release: 2026-08-13. Committed within the last 45 days.
Mattermost is published under ⊘ Proprietary. Non-standard or mixed licensing. Check the repository before commercial use.
177 open-source implementations, 100 of them actively maintained, led by Mastodon at 50k stars. Saturation score 77/100 — Crowded. Free, maintained alternatives already dominate this category.
Alternative to Social network/ Micro-blogging
Federated microblogging server.
Alternative to Tribe, Circle, Community management
Advanced forum / community solution based on Ruby and JS.
Alternative to Slack, Team communication, Chat & Team Communication
Communications platform that puts data protection first (alternative to Gitter.im and Slack).
Alternative to Courier, MagicBell, Knock, Notification infrastructure, Push notifications
Notification infrastructure for developers.
Alternative to Intercom, Zendesk, Live chat
Customer communication platform (alternative to Intercom and Zendesk).
Alternative to Notification infrastructure, Push notifications
Push notifications to phone or desktop using HTTP PUT/POST, with Android app, CLI and web app, similar to Pushover and Gotify.
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