Code Hosting & CI/CD · reliability comparison

GitHub vs Semaphore: which is more reliable? (2026)

Semaphore is more reliable than GitHub, scoring 54.9 vs 47.1 out of 100. Over the last 90 days GitHub reported 35 incidents and Semaphore reported 22, with effective uptime of 98.37% and 98.92% respectively. GitHub resolves incidents faster on average (2h 33m).

Data updated Nov 1, 2026 · How we score

GitHub

47.1/100

Operational

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Semaphore

54.9/100

Operational

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VS
MetricGitHubSemaphore
Reliability score47.154.9
Rank (code hosting & CI platforms)#10#9
Uptime (90 days)98.37%98.92%
Incidents (90 days)3522
Partial / major outages116
Avg time to resolve2h 33m4h 2m
Outages we detected00
Transparency score100/100100/100

Where GitHub and Semaphore differ

  • GitHub reported 59% more incidents than Semaphore over the last 90 days (35 vs 22).
  • GitHub had 11 partial or major outages, compared with 6 for Semaphore.
  • GitHub fixes problems faster: 2h 33m on average, against 4h 2m for Semaphore.
  • GitHub's longest outage on record lasted 4h 30m (Oct 21, 2026); Semaphore's lasted 10h 5m (Aug 31, 2026).

90-day uptime

GitHub

Aug 4, 2026 – Aug 17, 2026: no dataAug 18, 2026: 97.47% uptime, 1 incident (Degraded performance)Aug 19, 2026 – Aug 23, 2026: no incidentsAug 24, 2026: 99.60% uptime, 2 incidents (Degraded performance)Aug 25, 2026: no incidentsAug 26, 2026: 87.53% uptime, 3 incidents (Major outage)Aug 27, 2026: 99.72% uptime, 1 incident (Degraded performance)Aug 28, 2026 – Aug 31, 2026: no incidentsSep 1, 2026: 99.36% uptime, 1 incident (Degraded performance)Sep 2, 2026 – Sep 3, 2026: no incidentsSep 4, 2026: 99.77% uptime, 1 incident (Degraded performance)Sep 5, 2026 – Sep 12, 2026: no incidentsSep 13, 2026: 93.83% uptime, 1 incident (Major outage)Sep 14, 2026: 99.42% uptime, 1 incident (Degraded performance)Sep 15, 2026: 98.54% uptime, 2 incidents (Degraded performance)Sep 16, 2026 – Sep 19, 2026: no incidentsSep 20, 2026: 99.28% uptime, 1 incident (Degraded performance)Sep 21, 2026 – Sep 22, 2026: no incidentsSep 23, 2026: 91.36% uptime, 1 incident (Degraded performance)Sep 24, 2026: 96.92% uptime, 1 incident (Degraded performance)Sep 25, 2026 – Sep 30, 2026: no incidentsOct 1, 2026: 97.81% uptime, 3 incidents (Degraded performance)Oct 2, 2026 – Oct 4, 2026: no incidentsOct 5, 2026: 84.45% uptime, 2 incidents (Major outage)Oct 6, 2026: 81.28% uptime, 2 incidents (Major outage)Oct 7, 2026: 96.68% uptime, 2 incidents (Major outage)Oct 8, 2026 – Oct 11, 2026: no incidentsOct 12, 2026: 95.05% uptime, 1 incident (Degraded performance)Oct 13, 2026: no incidentsOct 14, 2026: 100% uptime, 1 incident (Degraded performance)Oct 15, 2026 – Oct 18, 2026: no incidentsOct 19, 2026: 95.30% uptime, 1 incident (Major outage)Oct 20, 2026: no incidentsOct 21, 2026: 81.24% uptime, 1 incident (Major outage)Oct 22, 2026: 94.03% uptime, 2 incidents (Degraded performance)Oct 23, 2026: 95.63% uptime, 3 incidents (Degraded performance)Oct 24, 2026 – Oct 25, 2026: no incidentsOct 26, 2026: 99.90% uptime, 1 incident (Degraded performance)Oct 27, 2026 – Oct 29, 2026: no incidentsOct 30, 2026: 93.02% uptime, 3 incidents (Major outage)Oct 31, 2026 – Nov 1, 2026: no incidents
90 days ago98.385% average daily uptimeToday

Semaphore

Aug 4, 2026: 97.03% uptime, 1 incident (Partial outage)Aug 5, 2026 – Aug 17, 2026: no incidentsAug 18, 2026: 98.32% uptime, 1 incident (Degraded performance)Aug 19, 2026 – Aug 20, 2026: no incidentsAug 21, 2026: 96.75% uptime, 1 incident (Partial outage)Aug 22, 2026 – Aug 24, 2026: no incidentsAug 25, 2026: 96.12% uptime, 1 incident (Degraded performance)Aug 26, 2026: no incidentsAug 27, 2026: 94.88% uptime, 2 incidents (Major outage)Aug 28, 2026: 98.82% uptime, 1 incident (Degraded performance)Aug 29, 2026 – Aug 30, 2026: no incidentsAug 31, 2026: 57.98% uptime, 1 incident (Major outage)Sep 1, 2026: no incidentsSep 2, 2026: 92.59% uptime, 2 incidents (Degraded performance)Sep 3, 2026: 89.57% uptime, 1 incident (Degraded performance)Sep 4, 2026 – Sep 14, 2026: no incidentsSep 15, 2026: 98.73% uptime, 1 incident (Degraded performance)Sep 16, 2026: no incidentsSep 17, 2026: 97.79% uptime, 2 incidents (Partial outage)Sep 18, 2026 – Oct 12, 2026: no incidentsOct 13, 2026: 94.61% uptime, 2 incidents (Degraded performance)Oct 14, 2026: 98.66% uptime, 1 incident (Degraded performance)Oct 15, 2026 – Oct 20, 2026: no incidentsOct 21, 2026: 97.64% uptime, 1 incident (Degraded performance)Oct 22, 2026: 98.59% uptime, 1 incident (Degraded performance)Oct 23, 2026 – Oct 25, 2026: no incidentsOct 26, 2026: 98.11% uptime, 2 incidents (Degraded performance)Oct 27, 2026: 98.18% uptime, 1 incident (Degraded performance)Oct 28, 2026: no incidentsOct 29, 2026: 99.28% uptime, 1 incident (Degraded performance)Oct 30, 2026: 99.82% uptime, 1 incident (Degraded performance)Oct 31, 2026 – Nov 1, 2026: no incidents
90 days ago98.928% average daily uptimeToday

Recent GitHub incidents

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Recent Semaphore incidents

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