Outage report · Partial outage
Semaphore outage on Jul 21, 2026
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SeverityPartial outage
StartedJul 21, 2026, 08:36UTC
ResolvedJul 21, 2026, 13:46UTC
Duration5h 10m
What happened
Semaphore reported a partial outage starting Jul 21, 2026, 08:36 UTC, affecting Semaphore. It was marked resolved at Jul 21, 2026, 13:46 UTC.
- The incident lasted 5h 10m from first report to resolution.
- It was the 3rd longest of 5 significant outages Semaphore reported in the 12 months up to it.
- Semaphore had reported 1 other partial or major outage in the 90 days before it.
- 7 other vendors we track reported a significant incident within 12 hours of it.
Latest update from Semaphore
GitHub confirmed that the incident on their end has been resolved. You can review the GitHub update here: https://www.githubstatus.com/incidents/g40zcbvchny4
What our independent monitoring saw
Our independent monitoring of Semaphore started after this incident, so this report is based on Semaphore's status page.
Other outages around the same time
Significant incidents other vendors reported within 12 hours of this one.
Semaphore's overall reliability
54.9/100
Semaphore has a reliability score of 54.9/100, with 98.92% effective uptime and 22 incidents over the last 90 days.
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