Online Course Platforms · reliability comparison
Circle vs Simplero: which is more reliable? (2026)
Circle is more reliable than Simplero, scoring 97.6 vs 94.2 out of 100. Over the last 90 days Circle reported 6 incidents and Simplero reported 1, with effective uptime of 100% and 99.96% respectively.
Data updated Nov 1, 2026 · How we score
| Metric | Circle | Simplero |
|---|---|---|
| Reliability score | 97.6 | 94.2 |
| Rank (online course platforms) | #1 | #5 |
| Uptime (90 days) | 100% | 99.96% |
| Incidents (90 days) | 6 | 1 |
| Partial / major outages | 0 | 1 |
| Avg time to resolve | — | 1h 41m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Circle and Simplero differ
- Circle reported 6× as many incidents as Simplero over the last 90 days (6 vs 1).
- Simplero had 1 partial or major outage, compared with 0 for Circle.
- Circle's longest outage on record lasted 3h 28m (May 28, 2026); Simplero's lasted 2h 54m (Jun 8, 2026).
90-day uptime
Circle
Simplero
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Circle incidents
- InformationalOct 5, 2026 · resolved in <1m
Affected: Sign-up & Login, Posts & Comments, Notifications, Direct Messaging & Chat, Paywalls & Member Billing, Live Streams & Rooms +5 more
- InformationalOct 3, 2026 · resolved in 5m
- InformationalSep 1, 2026 · resolved in 44m
- InformationalAug 27, 2026 · resolved in 1m
Affected: Sign-up & Login, REST API, Circle iOS App, Posts & Comments, Circle Android App, Notifications +11 more
- InformationalAug 20, 2026 · resolved in <1m
- InformationalAug 19, 2026 · resolved in 16m
Recent Simplero incidents
- MaintenanceSep 16, 2026 · ongoing
Affected: Background processing, Website, API
- Partial outageAug 24, 2026 · resolved in 1h 41m
SSL Certificate Warning on Some Custom Domains
Affected: Website
Other online course platforms to consider
- Uscreen · #2 · 99.99% uptime
- Mighty Networks · #3 · 99.98% uptime
- Kajabi · #4 · 100% uptime
- Disco · #6 · 99.97% uptime
See the full most reliable online course platforms ranking →