Authentication Providers · reliability comparison
Clerk vs FusionAuth Cloud: which is more reliable? (2026)
FusionAuth Cloud is more reliable than Clerk, scoring 100.0 vs 53.3 out of 100. Over the last 90 days Clerk reported 9 incidents and FusionAuth Cloud reported 0, with effective uptime of 98.98% and 100% respectively.
Data updated Nov 2, 2026 · How we score
| Metric | Clerk | FusionAuth Cloud |
|---|---|---|
| Reliability score | 53.3 | 100.0 |
| Rank (authentication providers) | #6 | — |
| Uptime (90 days) | 98.98% | 100% |
| Incidents (90 days) | 9 | 0 |
| Partial / major outages | 1 | 0 |
| Avg time to resolve | 16h 6m | — |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Clerk and FusionAuth Cloud differ
- FusionAuth Cloud reported no incidents in the last 90 days, while Clerk reported 9.
- Clerk had 1 partial or major outage, compared with 0 for FusionAuth Cloud.
- Clerk's longest outage on record lasted 3h 32m (Jul 12, 2026); FusionAuth Cloud's lasted 3d (Mar 2, 2026).
90-day uptime
Clerk
FusionAuth Cloud
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Clerk incidents
- Partial outageOct 29, 2026 · resolved in 36m
Affected: Authentication & User
- Degraded performanceOct 21, 2026 · resolved in 1d 21h
Issues with Documentation "Ask AI"
Affected: Ask AI
- Degraded performanceOct 1, 2026 · resolved in 14h 46m
Affected: Dashboard analytics, Dashboard, Dashboard search
- Degraded performanceSep 28, 2026 · resolved in 21d 2h
Development instances only - Apple rejecting emails
Affected: Email delivery
- MaintenanceSep 24, 2026 · ongoing
Scheduled Database Maintenance
Affected: SMS delivery, Authentication & User, Dashboard, Machine authentication, Application "Go live", Billing +8 more
- Degraded performanceSep 16, 2026 · resolved in 1h 8m
Affected: Webhooks
Recent FusionAuth Cloud incidents
No incidents reported by FusionAuth Cloud in the last 90 days.
Other authentication providers to consider
- Ory Network · #1 · 99.99% uptime
- Kinde · #2 · 99.96% uptime
- Frontegg · #3 · 99.97% uptime
- Stytch · #4 · 99.82% uptime
See the full most reliable authentication providers ranking →