Code Hosting & CI/CD · reliability comparison
CircleCI vs Harness: which is more reliable? (2026)
CircleCI is more reliable than Harness, scoring 59.2 vs 56.4 out of 100. Over the last 90 days CircleCI reported 28 incidents and Harness reported 25, with effective uptime of 99.19% and 99.04% respectively. CircleCI resolves incidents faster on average (2h 26m).
Data updated Nov 1, 2026 · How we score
| Metric | CircleCI | Harness |
|---|---|---|
| Reliability score | 59.2 | 56.4 |
| Rank (code hosting & CI platforms) | #7 | #8 |
| Uptime (90 days) | 99.19% | 99.04% |
| Incidents (90 days) | 28 | 25 |
| Partial / major outages | 3 | 4 |
| Avg time to resolve | 2h 26m | 4h 1m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where CircleCI and Harness differ
- CircleCI reported 12% more incidents than Harness over the last 90 days (28 vs 25).
- Harness had 4 partial or major outages, compared with 3 for CircleCI.
- CircleCI fixes problems faster: 2h 26m on average, against 4h 1m for Harness.
- CircleCI's longest outage on record lasted 14h 36m (Oct 9, 2026); Harness's lasted 8h 28m (Sep 14, 2026).
90-day uptime
CircleCI
Harness
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent CircleCI incidents
- Degraded performanceOct 28, 2026 · resolved in 1h 3m
Delays for gen2 dedicated IP range jobs
Affected: Docker Jobs
- Degraded performanceOct 21, 2026 · resolved in 1h 24m
Increased Docker gen2 wait times
Affected: Docker Jobs
- Degraded performanceOct 20, 2026 · resolved in 2h 16m
Increased wait times for macOS jobs on m4pro.large
Affected: macOS Jobs
- Degraded performanceOct 14, 2026 · resolved in 1h 13m
Delays starting macOS jobs that use Xcode 26.6.0
Affected: macOS Jobs
- Partial outageOct 9, 2026 · resolved in 14h 36m
Delay in data appearing in UI and APIofficial update ↗
Affected: CircleCI API, CircleCI UI
- Degraded performanceOct 8, 2026 · resolved in 3h 35m
Elevated wait times for machine jobs
Affected: Machine Jobs
Recent Harness incidents
- InformationalOct 28, 2026 · resolved in <1m
Intermittent CI Pipeline using VM Runner slowness and errors
- Degraded performanceOct 27, 2026 · resolved in 2h 32m
We are currently seeing delegate selection issue for VM infra executions
Affected: Continuous Integration Enterprise(CIE) - Self Hosted Runners
- Degraded performanceOct 19, 2026 · resolved in 35m
Affected: Continuous Delivery - Next Generation (CDNG), Continuous Integration Enterprise(CIE) - Self Hosted Runners, Continuous Integration Enterprise(CIE) - Mac Cloud Builds, Continuous Integration Enterprise(CIE) - Windows Cloud Builds, Continuous Integration Enterprise(CIE) - Linux Cloud Builds, Security Testing Orchestration (STO) +2 more
- Degraded performanceOct 15, 2026 · resolved in 11m
Degraded performance in UI execution graph in prod3
Affected: Continuous Delivery - Next Generation (CDNG)
- Degraded performanceOct 13, 2026 · resolved in 3h 23m
Prod1: Intermittent issue with IACM stages in some pipelines
Affected: Infrastructure as Code Management (IaCM)
- Degraded performanceOct 12, 2026 · resolved in <1m
Harness CI Cloud build issues when accessing Maven Central
Affected: Continuous Integration Enterprise(CIE) - Mac Cloud Builds, Continuous Integration Enterprise(CIE) - Mac Cloud Builds, Continuous Integration Enterprise(CIE) - Mac Cloud Builds, Continuous Integration Enterprise(CIE) - Windows Cloud Builds, Continuous Integration Enterprise(CIE) - Mac Cloud Builds, Continuous Integration Enterprise(CIE) - Mac Cloud Builds +12 more
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 →