Mastodon
Alternative to Social network/ Micro-blogging
Federated microblogging server.
Actively maintained
Real momentum
AGPL-3.0
Zulip is a powerful, open source group chat application.
Zulip is an open-source communication project positioned as an alternative to Slack, Team communication, Chat & Team Communication, with 26k GitHub stars and a health score of 100/100. It committed 4927 times in the last twelve months across 12 of those months, and its status is actively maintained. Licence: Apache-2.0. 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 | 601 |
| Commits, last 12 months | 4927 |
| Months with activity | 12 of 12 |
| Last release | 2026-08-10 |
| Archived | No |
| Licence | Apache-2.0 |
| Category | Communication |
| Positioned against | Slack, Team communication, Chat & Team Communication |
Health score combines commit recency, twelve-month commit volume, months with activity, release recency and archive state. Metadata refreshed August 2026.
Permissive (MIT, Apache, BSD): you can fork it, close the source and sell it. Lowest legal friction for a commercial product.
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.
Zulip 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. Zulip recorded 4927 commits over the last twelve months, with activity in 12 of those months and 601 commits in the last quarter. Last commit: 2026-08-15. Last release: 2026-08-10. Committed within the last 45 days.
Zulip is published under Apache-2.0. Permissive (MIT, Apache, BSD): you can fork it, close the source and sell it. Lowest legal friction for a commercial product.
Zulip targets the same job as Slack, Team communication, Chat & Team Communication and is actively shipping. Adoption sits at 26k stars. Whether it is a good replacement depends on your deployment constraints: self-hosting adds infrastructure, upgrade and security work that a commercial subscription absorbs for you.
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
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