Service targets

• 99.5% monthly availability for the web app and API, excluding announced maintenance.
• 99% monthly availability for AI generation and grading, which depend on our AI provider. Submitted answers are always saved; grading completes automatically when the AI service recovers.
• Incidents affecting customers are posted here within 30 minutes of detection, with updates until resolved.
• Planned maintenance is announced here in advance and scheduled outside UK working hours where possible.
• Data is backed up continuously with point-in-time recovery.

Uptime is measured every 10 minutes by automated checks. Contractual service levels for organisations are set out in each customer agreement. See also our security overview.