Code Hosting & CI/CD · reliability comparison

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

CircleCI is more reliable than GitHub, scoring 59.2 vs 47.1 out of 100. Over the last 90 days CircleCI reported 28 incidents and GitHub reported 35, with effective uptime of 99.19% and 98.37% respectively. CircleCI resolves incidents faster on average (2h 26m).

Data updated Nov 1, 2026 · How we score

CircleCI

59.2/100

Operational

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GitHub

47.1/100

Operational

Visit GitHub ↗
VS
MetricCircleCIGitHub
Reliability score59.247.1
Rank (code hosting & CI platforms)#6#10
Uptime (90 days)99.19%98.37%
Incidents (90 days)2835
Partial / major outages311
Avg time to resolve2h 26m2h 33m
Outages we detected00
Transparency score100/100100/100

Where CircleCI and GitHub differ

  • GitHub reported 25% more incidents than CircleCI over the last 90 days (35 vs 28).
  • GitHub had 11 partial or major outages, compared with 3 for CircleCI.
  • CircleCI's longest outage on record lasted 14h 36m (Oct 9, 2026); GitHub's lasted 4h 30m (Oct 21, 2026).

90-day uptime

CircleCI

Aug 4, 2026: 97.36% uptime, 1 incident (Degraded performance)Aug 5, 2026: 97.47% uptime, 1 incident (Degraded performance)Aug 6, 2026 – Aug 11, 2026: no incidentsAug 12, 2026: 99.89% uptime, 1 incident (Degraded performance)Aug 13, 2026 – Aug 16, 2026: no incidentsAug 17, 2026: 89.22% uptime, 2 incidents (Partial outage)Aug 18, 2026 – Aug 24, 2026: no incidentsAug 25, 2026: 100% uptime, 1 incident (Degraded performance)Aug 26, 2026: 99.72% uptime, 1 incident (Degraded performance)Aug 27, 2026 – Sep 3, 2026: no incidentsSep 4, 2026: 98.96% uptime, 1 incident (Degraded performance)Sep 5, 2026 – Sep 9, 2026: no incidentsSep 10, 2026: 99.98% uptime, 1 incident (Degraded performance)Sep 11, 2026 – Sep 13, 2026: no incidentsSep 14, 2026: 99.37% uptime, 1 incident (Degraded performance)Sep 15, 2026: 98.53% uptime, 1 incident (Degraded performance)Sep 16, 2026: 97.13% uptime, 1 incident (Degraded performance)Sep 17, 2026 – Sep 20, 2026: no incidentsSep 21, 2026: 99.50% uptime, 1 incident (Degraded performance)Sep 22, 2026 – Sep 30, 2026: no incidentsOct 1, 2026: 98.96% uptime, 1 incident (Degraded performance)Oct 2, 2026 – Oct 5, 2026: no incidentsOct 6, 2026: 88.94% uptime, 1 incident (Partial outage)Oct 7, 2026: 98.43% uptime, 3 incidents (Degraded performance)Oct 8, 2026: 97.75% uptime, 1 incident (Degraded performance)Oct 9, 2026: 74.06% uptime, 1 incident (Partial outage)Oct 10, 2026: 95.52% uptime, 1 incident (Partial outage)Oct 11, 2026 – Oct 13, 2026: no incidentsOct 14, 2026: 99.23% uptime, 1 incident (Degraded performance)Oct 15, 2026 – Oct 19, 2026: no incidentsOct 20, 2026: 98.58% uptime, 1 incident (Degraded performance)Oct 21, 2026: 99.12% uptime, 1 incident (Degraded performance)Oct 22, 2026 – Oct 27, 2026: no incidentsOct 28, 2026: 99.34% uptime, 1 incident (Degraded performance)Oct 29, 2026 – Nov 1, 2026: no incidents
90 days ago99.190% average daily uptimeToday

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

Recent CircleCI incidents

Full CircleCI reliability report →

Recent GitHub incidents

Full GitHub reliability report →

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