Team Chat Apps · reliability comparison
Mattermost vs Zulip: which is more reliable? (2026)
Mattermost and Zulip are effectively tied on reliability (100.0 vs 100.0). Over the last 90 days Mattermost reported 0 incidents and Zulip reported 0, with effective uptime of 100% and 100% respectively.
Data updated Nov 1, 2026 · How we score
| Metric | Mattermost | Zulip |
|---|---|---|
| Reliability score | 100.0 | 100.0 |
| Rank (team chat apps) | #3 | #6 |
| Uptime (90 days) | 100% | 100% |
| Incidents (90 days) | 0 | 0 |
| Partial / major outages | 0 | 0 |
| Avg time to resolve | — | — |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Mattermost and Zulip differ
- Mattermost's longest incident on record lasted 21h 40m (Feb 26, 2026); Zulip's lasted 3h 55m (Mar 26, 2026).
90-day uptime
Mattermost
Zulip
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Mattermost incidents
No incidents reported by Mattermost in the last 90 days.
Recent Zulip incidents
No incidents reported by Zulip in the last 90 days.
Other team chat apps to consider
- Element · #1 · 100% uptime
- Flock · #2 · 100% uptime
- Rocket.Chat · #4 · 100% uptime
- Twist · #5 · 100% uptime