Code Hosting & CI/CD · reliability comparison

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

Buildkite is more reliable than CircleCI, scoring 65.8 vs 59.2 out of 100. Over the last 90 days Buildkite reported 29 incidents and CircleCI reported 28, with effective uptime of 99.57% and 99.19% respectively. Buildkite resolves incidents faster on average (1h 32m).

Data updated Nov 1, 2026 · How we score

Buildkite

65.8/100

Operational

Visit Buildkite ↗

CircleCI

59.2/100

Operational

Visit CircleCI ↗
VS
MetricBuildkiteCircleCI
Reliability score65.859.2
Rank (code hosting & CI platforms)#5#6
Uptime (90 days)99.57%99.19%
Incidents (90 days)2928
Partial / major outages53
Avg time to resolve1h 32m2h 26m
Outages we detected00
Transparency score100/100100/100

Where Buildkite and CircleCI differ

  • Buildkite reported 4% more incidents than CircleCI over the last 90 days (29 vs 28).
  • Buildkite had 5 partial or major outages, compared with 3 for CircleCI.
  • Buildkite fixes problems faster: 1h 32m on average, against 2h 26m for CircleCI.
  • Buildkite's longest outage on record lasted 6h 47m (Sep 9, 2026); CircleCI's lasted 14h 36m (Oct 9, 2026).

90-day uptime

Buildkite

Aug 4, 2026: no incidentsAug 5, 2026: 100% uptime, 1 incident (Degraded performance)Aug 6, 2026 – Aug 9, 2026: no incidentsAug 10, 2026: 99.38% uptime, 1 incident (Degraded performance)Aug 11, 2026: 98.70% uptime, 1 incident (Degraded performance)Aug 12, 2026: 99.11% uptime, 1 incident (Degraded performance)Aug 13, 2026: 99.38% uptime, 1 incident (Degraded performance)Aug 14, 2026 – Aug 16, 2026: no incidentsAug 17, 2026: 98.77% uptime, 1 incident (Degraded performance)Aug 18, 2026 – Aug 24, 2026: no incidentsAug 25, 2026: 96.75% uptime, 2 incidents (Partial outage)Aug 26, 2026: 98.42% uptime, 2 incidents (Partial outage)Aug 27, 2026: 99.46% uptime, 1 incident (Degraded performance)Aug 28, 2026 – Aug 31, 2026: no incidentsSep 1, 2026: 99.16% uptime, 1 incident (Degraded performance)Sep 2, 2026: 97.73% uptime, 1 incident (Partial outage)Sep 3, 2026: 99.31% uptime, 1 incident (Degraded performance)Sep 4, 2026: 99.40% uptime, 1 incident (Degraded performance)Sep 5, 2026 – Sep 8, 2026: no incidentsSep 9, 2026: 89.84% uptime, 1 incident (Partial outage)Sep 10, 2026: 96.02% uptime, 1 incident (Partial outage)Sep 11, 2026 – Sep 20, 2026: no incidentsSep 21, 2026: 99.26% uptime, 2 incidents (Degraded performance)Sep 22, 2026: 98.53% uptime, 2 incidents (Partial outage)Sep 23, 2026 – Sep 29, 2026: no incidentsSep 30, 2026: 99.07% uptime, 2 incidents (Partial outage)Oct 1, 2026: 99.50% uptime, 1 incident (Degraded performance)Oct 2, 2026 – Oct 5, 2026: no incidentsOct 6, 2026: 96.45% uptime, 1 incident (Degraded performance)Oct 7, 2026 – Oct 18, 2026: no incidentsOct 19, 2026: 100% uptime, 1 incident (Degraded performance)Oct 20, 2026: 99.28% uptime, 2 incidents (Degraded performance)Oct 21, 2026: no incidentsOct 22, 2026: 99.52% uptime, 1 incident (Degraded performance)Oct 23, 2026 – Oct 27, 2026: no incidentsOct 28, 2026: 99.67% uptime, 1 incident (Degraded performance)Oct 29, 2026: 98.74% uptime, 1 incident (Degraded performance)Oct 30, 2026 – Nov 1, 2026: no incidents
90 days ago99.573% average daily uptimeToday

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

Recent Buildkite incidents

Full Buildkite reliability report →

Recent CircleCI incidents

Full CircleCI reliability report →

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