Code Hosting & CI/CD · reliability comparison
Buildkite vs Semaphore: which is more reliable? (2026)
Buildkite is more reliable than Semaphore, scoring 65.8 vs 54.9 out of 100. Over the last 90 days Buildkite reported 29 incidents and Semaphore reported 22, with effective uptime of 99.57% and 98.92% respectively. Buildkite resolves incidents faster on average (1h 32m).
Data updated Nov 1, 2026 · How we score
| Metric | Buildkite | Semaphore |
|---|---|---|
| Reliability score | 65.8 | 54.9 |
| Rank (code hosting & CI platforms) | #6 | #10 |
| Uptime (90 days) | 99.57% | 98.92% |
| Incidents (90 days) | 29 | 22 |
| Partial / major outages | 5 | 6 |
| Avg time to resolve | 1h 32m | 4h 2m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Buildkite and Semaphore differ
- Buildkite reported 32% more incidents than Semaphore over the last 90 days (29 vs 22).
- Semaphore had 6 partial or major outages, compared with 5 for Buildkite.
- Buildkite fixes problems faster: 1h 32m on average, against 4h 2m for Semaphore (2.6× quicker).
- Buildkite's longest outage on record lasted 6h 47m (Sep 9, 2026); Semaphore's lasted 10h 5m (Aug 31, 2026).
90-day uptime
Buildkite
Semaphore
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Buildkite incidents
- Degraded performanceOct 29, 2026 · resolved in 2h 1m
Affected: Job Queue
- Degraded performanceOct 28, 2026 · resolved in 32m
Increased latency and error rates
Affected: REST API, Agent API
- InformationalOct 26, 2026 · resolved in <1m
- InformationalOct 24, 2026 · resolved in <1m
Affected: REST API, Web, Agent API, Remote MCP Server, Job Queue
- Degraded performanceOct 22, 2026 · resolved in 46m
Delays with Hosted Agents jobs
Affected: Hosted Agents
- InformationalOct 20, 2026 · resolved in 1d
Recent Semaphore incidents
- Degraded performanceOct 29, 2026 · resolved in 1h 25m
Affected: Semaphore
- Degraded performanceOct 26, 2026 · resolved in 3h 14m
Affected: Semaphore
- Degraded performanceOct 26, 2026 · resolved in 2h 41m
Affected: Semaphore
- Degraded performanceOct 22, 2026 · resolved in 2h 15m
Affected: Semaphore
- Degraded performanceOct 21, 2026 · resolved in 3h 47m
Affected: Semaphore
- InformationalOct 20, 2026 · resolved in 2h 1m
Affected: Semaphore
Other code hosting & CI platforms to consider
- Bitrise · #1 · 99.90% uptime
- Depot · #2 · 99.89% uptime
- GitLab · #3 · 100% uptime
- Bitbucket · #4 · 99.74% uptime
See the full most reliable code hosting & ci/cd platforms ranking →