compare
MongooseIM vs Zulip
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | MongooseIM | Zulip |
|---|---|---|
| Language | Erlang | Python |
| Licence | Other | Apache-2.0 |
| Stars | 1.8k | 26k |
| Latest | 6.9.0 | 12.3 |
| Last push | 2026-10-01 | 2026-10-06 |
| Release cadence | about 38 days between releases | about 45 days between releases |
| Active contributors | 9 commit authors on the default branch in the last 90 days | 52+ commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Both replace Slack. Alternatives to Slack →
PartialMongooseIMA clustered XMPP server built for large deployments; teams chat through an XMPP client.
Full replacementZulipConversations split into topics inside each channel, with an importer for Slack exports.
MongooseIM
Zulip
- 12.32026-09-21Zulip Server 12.3
- 12.22026-08-10Zulip Server 12.2
- 12.12026-06-26Zulip Server 12.1
- 12.02026-04-27Zulip Server 12.0
- 12.0-beta22026-04-26Zulip Server 12.0-beta2pre-release
MongooseIM
unsigned The latest release, 6.9.0, carries no signature GitHub could verify.
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Zulip
unsigned The latest release, 12.3, carries no signature GitHub could verify.
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