Semaphore

semaphoreci.com (opens in new tab)Status page (opens in new tab)

Status page says: Operational since Oct 19
Last 90 days: 17 incidents, 6 major or critical
Rewrites caught: None so far
Next deprecation: None announced

Semaphore incidents per day, last 90 days

Select a day to jump to its incidents below.

How Semaphore reports incidents

Not enough incidents to compare Semaphore with other vendors yet: a vendor needs 20 incidents in a year and 10 with full update detail (Semaphore has 43 and 0).

Provisional. Built nightly from every archived version of each incident, last on Oct 19. Compare all vendors

Dependencies

What Semaphore relies on and who relies on Semaphore, as observed in status-page incidents: who they blame, where they say they run, and who fails at the same time. Observed, not verified.

Semaphore depends on

Provider	Evidence	Signal
GitHub	blamed in 5 incidents; integration affected in 6; together in 1 outage event “…incident has been resolved. This incident has been resolved. Webhook delivery delays from GitHub led to a backlog of workflows being triggered all at once as delivery resumes. This caused a temporary…” incident	Strong
AWS	blamed in 1 incident; together in 1 outage event “…Network congestion on route to AWS ECR us-east region This incident has been resolved. This incident has been resolved. We are continuing to investigate this issue. We are continuing to investigate th…” incident	Likely
Fastly	blamed in 1 incident “…Network timeouts towards services relying on Fastly CDN At 2:55 UTC a routing change was applied towards Fastly CDN. All our tests are confirming that the issue is now resolved. If you are still notic…” incident	Likely
Bitbucket	integration affected in 2 “…Issues with Bitbucket integration This incident has been resolved. A fix has been implemented and we are monitoring the results. The issue has been identified and a fix is being implemented. This inci…” incident	Likely

Outage events: GitHub, Jul 21, Anthropic, Feb 4 (timing), AWS us-east-1, Oct 20, 2025 (timing), Google Cloud, Jun 12, 2025 (timing), Google Cloud, Nov 16, 2021 (timing), Auth0, Apr 20, 2021 (timing), Google Cloud, Jun 2, 2019 (timing).

Strong: same company, or blamed in two separate outages. Likely: blamed once, or named as hosting and failing together. Weak: listed as a subprocessor, integration-only, or failing together repeatedly without being named.

Changes and edits

Incidents Semaphore rewrote or removed, and notable changes to the pages we watch.

~~Struck in red~~ is what Semaphore removed. Blue is what they added.

Thursday, September 17

1 incident change

Major
14:17Major incident
Delays in job processing

Monday, August 31

1 incident change

Critical
12:06Critical incident
Delays in job processing

Thursday, August 27

2 incident changes

Major
20:09Major incident
Delays in Job Processing
Critical
18:43Critical incident
Platform Outage

Friday, August 21

1 incident change

Major
19:14Major incident
Issues with Bitbucket integration

Tuesday, August 4

1 incident change

Major
10:38Major incident
Bitbucket integration may currently be experiencing issues

Tuesday, July 21

1 incident change

Major
08:36Major incident
Some jobs may have issues authenticating with GitHub Event

Friday, July 17

1 incident change

Major
10:32Major incident
Some features may currently be unresponsive

Tuesday, February 24

1 incident change

Major
08:49Major incident
Jobs Not Starting and Processing Delays

Monday, October 20, 2025

1 incident change

Major
08:44Major incident
Docker Hub outage affecting image push/pulls in Semaphore Event

Full Semaphore change history

Pricing and pages we watch

Page	Versions	Last changed	Last checked	History
Privacy policy (opens in new tab)	1	2026-10-19	2026-10-19	No changes yet

Each change links to its diff: the changed passages with a few words of context, never a full copy of the page.

Incidents

Latest 100 of 281 incidents since Dec 13, 2017, 96 of them major or critical. Maintenance is left out.

Per year, major and critical in amber:

Wednesday, October 14

1 incident

Minor, 2 h 8 min
15:10Minor incident
Delays in job processing Vendor status page⁠ (opens in new tab)

Tuesday, October 13

2 incidents

Minor, 2 h 57 min
15:16Minor incident
Delays in job processing Vendor status page⁠ (opens in new tab)
Minor, 8 h 37 min
13:53Minor incident
Intermittent network connectivity issues Vendor status page⁠ (opens in new tab)

Thursday, September 17

2 incidents, 1 major or critical

Major, 52 min
14:17Major incident
Delays in job processing Vendor status page⁠ (opens in new tab)
Minor, 38 min
13:33Minor incident
Intermittent cache connection errors Vendor status page⁠ (opens in new tab)

Tuesday, September 15

1 incident

Minor, 2 h 1 min
14:45Minor incident
Delays in job processing Vendor status page⁠ (opens in new tab)

Wednesday, September 2

2 incidents

Minor, 24 h 32 min
16:08Minor incident
Periodic authentication failure with GitHub repositories Vendor status page⁠ (opens in new tab)
Minor, 4 h
11:17Minor incident
Periodic authentication failure with GitHub repositories Vendor status page⁠ (opens in new tab)

Monday, August 31

1 incident, 1 major or critical

Critical, 10 h 5 min
12:06Critical incident
Delays in job processing Vendor status page⁠ (opens in new tab)

Friday, August 28

1 incident

Minor, 1 h 53 min
19:17Minor incident
Delays in job processing Vendor status page⁠ (opens in new tab)

Thursday, August 27

2 incidents, 2 major or critical

Major, 52 min
20:09Major incident
Delays in Job Processing Vendor status page⁠ (opens in new tab)
Critical, 47 min
18:43Critical incident
Platform Outage Vendor status page⁠ (opens in new tab)

Tuesday, August 25

1 incident

Minor, 6 h 12 min
08:35Minor incident
Degraded performance on r1-standard machines Vendor status page⁠ (opens in new tab)

Friday, August 21

1 incident, 1 major or critical

Major, 1 h 34 min
19:14Major incident
Issues with Bitbucket integration Vendor status page⁠ (opens in new tab)

Tuesday, August 18

1 incident

Minor, 2 h 41 min
15:07Minor incident
Delays in job processing - F1 machines Vendor status page⁠ (opens in new tab)

Tuesday, August 4

1 incident, 1 major or critical

Major, 1 h 25 min
10:38Major incident
Bitbucket integration may currently be experiencing issues Vendor status page⁠ (opens in new tab)

Thursday, July 23

1 incident

Minor, 1 h 43 min
00:35Minor incident
Delays in job processing Vendor status page⁠ (opens in new tab)

Tuesday, July 21

1 incident, 1 major or critical

Major, 5 h 10 min
08:36Major incident
Some jobs may have issues authenticating with GitHub Vendor status page⁠ (opens in new tab)Event

Friday, July 17

2 incidents, 1 major or critical

Major, 2 h 53 min
10:32Major incident
Some features may currently be unresponsive Vendor status page⁠ (opens in new tab)
Minor, 44 min
00:21Minor incident
Delays in job processing Vendor status page⁠ (opens in new tab)

Wednesday, June 24

1 incident

Minor, 25 min
21:01Minor incident
Elevated error rates Vendor status page⁠ (opens in new tab)

Wednesday, June 10

1 incident

Minor, 1 h 9 min
15:12Minor incident
Elevated Error Rates Vendor status page⁠ (opens in new tab)

Wednesday, May 20

1 incident

Minor, 6 h 48 min
08:44Minor incident
Delays when checking out GitHub repos via SSH Vendor status page⁠ (opens in new tab)

Tuesday, May 19

1 incident

Minor, 5 h 42 min
10:00Minor incident
Delays when checking out GitHub repos via SSH Vendor status page⁠ (opens in new tab)

Thursday, March 12

1 incident

Minor, 1 h 50 min
15:55Minor incident
Delays in job processing Vendor status page⁠ (opens in new tab)

Wednesday, March 11

1 incident

Minor, 1 h 14 min
16:28Minor incident
Delays in job processing Vendor status page⁠ (opens in new tab)

Sunday, March 8

1 incident

Minor, 3 h 31 min
15:21Minor incident
Delays in job processing Vendor status page⁠ (opens in new tab)

Tuesday, March 3

1 incident

Minor, 1 h
17:06Minor incident
Delays in job processing Vendor status page⁠ (opens in new tab)

Tuesday, February 24

1 incident, 1 major or critical

Major, 1 h 43 min
08:49Major incident
Jobs Not Starting and Processing Delays Vendor status page⁠ (opens in new tab)

Friday, February 20

1 incident

Minor, 2 h 47 min
15:56Minor incident
Delays in job processing Vendor status page⁠ (opens in new tab)

Wednesday, February 18

1 incident

Minor, 4 h 28 min
16:13Minor incident
Delays in job processing Vendor status page⁠ (opens in new tab)

Tuesday, February 17

1 incident

Minor, 1 h 46 min
16:32Minor incident
Delays in job processing Vendor status page⁠ (opens in new tab)

Thursday, February 5

1 incident

Minor, 1 h 1 min
16:28Minor incident
Delays in job processing Vendor status page⁠ (opens in new tab)

Wednesday, February 4

1 incident

Minor, 1 h 32 min
16:38Minor incident
Delays in job processing Vendor status page⁠ (opens in new tab)Event

Tuesday, February 3

2 incidents

Minor, 1 h 18 min
18:06Minor incident
Delays in Job Processing Vendor status page⁠ (opens in new tab)
Minor, 4 h 4 min
15:46Minor incident
Delivering webhooks delays between Github and Semaphore Vendor status page⁠ (opens in new tab)

Tuesday, January 27

1 incident

Minor, 3 h 36 min
15:34Minor incident
Delays in job processing on Semaphore Vendor status page⁠ (opens in new tab)

Wednesday, November 12, 2025

1 incident

Minor, 3 h 14 min
14:55Minor incident
Network connectivity issues towards us-east Vendor status page⁠ (opens in new tab)

Thursday, November 6, 2025

1 incident

Minor, 14 h 24 min
16:51Minor incident
Network congestion on route to AWS ECR us-east region Vendor status page⁠ (opens in new tab)

Tuesday, November 4, 2025

1 incident

Minor, 6 h 41 min
17:19Minor incident
Network congestion on route to AWS ECR us-east region Vendor status page⁠ (opens in new tab)

Wednesday, October 29, 2025

1 incident

Minor, 4 h 50 min
11:38Minor incident
Slow job processing Vendor status page⁠ (opens in new tab)

Tuesday, October 21, 2025

1 incident

Minor, 1 h
08:58Minor incident
Delays in job completion on Semaphore Vendor status page⁠ (opens in new tab)

Monday, October 20, 2025

1 incident, 1 major or critical

Major, 16 h 16 min
08:44Major incident
Docker Hub outage affecting image push/pulls in Semaphore Vendor status page⁠ (opens in new tab)Event

Tuesday, October 14, 2025

1 incident

Minor, 4 h 44 min
19:47Minor incident
Network congestion on route to AWS ECR us-east region Vendor status page⁠ (opens in new tab)

Thursday, October 2, 2025

1 incident

Minor, 3 h 38 min
18:48Minor incident
Slow job processing on e2 machine types Vendor status page⁠ (opens in new tab)

Wednesday, September 17, 2025

1 incident

Minor, 1 h 9 min
01:02Minor incident
Slow job processing on C1 machine types Vendor status page⁠ (opens in new tab)

Friday, September 12, 2025

1 incident, 1 major or critical

Major, 2 h 23 min
09:41Major incident
New project initialization issues Vendor status page⁠ (opens in new tab)

Thursday, September 4, 2025

1 incident, 1 major or critical

Major, 1 h 23 min
17:12Major incident
Job processing delays due to connectivity issues with GitHub Vendor status page⁠ (opens in new tab)

Thursday, August 28, 2025

1 incident

Minor, 7 h 49 min
17:46Minor incident
Network congestion on route to AWS ECR us-east region Vendor status page⁠ (opens in new tab)

Tuesday, August 19, 2025

1 incident

Minor, 1 h 12 min
11:01Minor incident
"Plans & Billing" page unavailable Vendor status page⁠ (opens in new tab)

Thursday, July 31, 2025

1 incident, 1 major or critical

Major, 32 min
12:13Major incident
Elevated error rates when fetching test results Vendor status page⁠ (opens in new tab)

Monday, July 7, 2025

1 incident, 1 major or critical

Major, 28 min
10:50Major incident
Delays in job processing on Semaphore Vendor status page⁠ (opens in new tab)

Monday, June 30, 2025

1 incident, 1 major or critical

Major, 40 min
17:40Major incident
Delays in Job Processing Vendor status page⁠ (opens in new tab)

Tuesday, June 17, 2025

2 incidents

Minor, 31 min
10:42Minor incident
Delays in job processing on Semaphore Vendor status page⁠ (opens in new tab)
Minor, 19 min
09:11Minor incident
Delays in job processing on Semaphore Vendor status page⁠ (opens in new tab)

Thursday, June 12, 2025

2 incidents, 1 major or critical

Minor, 1 h 23 min
18:22Minor incident
Delays in job processing on Semaphore 2.0 Vendor status page⁠ (opens in new tab)Event
Major, 1 h 2 min
11:16Major incident
Partial Account Access Issue: UI Message Vendor status page⁠ (opens in new tab)

Tuesday, June 10, 2025

1 incident

Minor, 15 min
06:55Minor incident
Delays in job processing on Semaphore Vendor status page⁠ (opens in new tab)

Sunday, June 8, 2025

1 incident, 1 major or critical

Major, 45 min
05:30Major incident
Delays in job processing on Semaphore 2.0 Vendor status page⁠ (opens in new tab)

Tuesday, June 3, 2025

1 incident

Minor, 1 h 5 min
15:55Minor incident
Delays in job processing on Semaphore 2.0 Vendor status page⁠ (opens in new tab)

Thursday, April 10, 2025

1 incident, 1 major or critical

Major, 1 h 54 min
09:42Major incident
Slow job processing on e2 and f1 machine types Vendor status page⁠ (opens in new tab)

Tuesday, April 8, 2025

3 incidents, 2 major or critical

Major, 33 min
18:02Major incident
Slow job processing on e2 and f1 machine types Vendor status page⁠ (opens in new tab)
Major, 44 min
17:16Major incident
Issues with Chrome and Chromedriver versions in Semaphore Vendor status page⁠ (opens in new tab)
Minor, under a minute
14:00Minor incident
Partial API outage Vendor status page⁠ (opens in new tab)

Thursday, March 27, 2025

1 incident, 1 major or critical

Major, 30 min
02:57Major incident
Delays in job processing on Semaphore Vendor status page⁠ (opens in new tab)

Monday, February 24, 2025

1 incident, 1 major or critical

Major, 37 min
16:09Major incident
Issues with Semaphore login Vendor status page⁠ (opens in new tab)

Tuesday, February 11, 2025

1 incident

No impact listed, 44 min
11:24Incident, no impact listed
Delays in job processing on Semaphore 2.0 Vendor status page⁠ (opens in new tab)

Friday, January 31, 2025

1 incident, 1 major or critical

Major, 1 h 2 min
12:37Major incident
Delays in job processing on Semaphore 2.0 Vendor status page⁠ (opens in new tab)

Monday, January 27, 2025

1 incident, 1 major or critical

Major, 1 h 3 min
17:33Major incident
Issues with GitHub Status checks on PR builds Vendor status page⁠ (opens in new tab)

Thursday, January 16, 2025

1 incident, 1 major or critical

Major, 1 h 11 min
10:54Major incident
Elevated error rates on Semaphore Vendor status page⁠ (opens in new tab)

Monday, December 23, 2024

1 incident, 1 major or critical

Major, 1 h 43 min
12:47Major incident
Initialization jobs failing on Semaphore Vendor status page⁠ (opens in new tab)

Thursday, November 28, 2024

1 incident

Minor, 3 h 34 min
11:25Minor incident
Issues with E2 machines availability Vendor status page⁠ (opens in new tab)

Tuesday, October 8, 2024

1 incident

Minor, 38 min
09:20Minor incident
Delays in job processing on Semaphore Vendor status page⁠ (opens in new tab)

Monday, August 19, 2024

1 incident, 1 major or critical

Major, 42 min
15:27Major incident
Delays in Job Processing Vendor status page⁠ (opens in new tab)

Tuesday, August 13, 2024

1 incident, 1 major or critical

Major, 1 h 21 min
14:51Major incident
Elevated error rates on Semaphore 2.0 Vendor status page⁠ (opens in new tab)

Tuesday, July 16, 2024

1 incident

Minor, 3 h 48 min
11:18Minor incident
Elevated error rates on the “Plans & Billing” page and Delays in loading pages Vendor status page⁠ (opens in new tab)

Monday, July 15, 2024

1 incident, 1 major or critical

Major, 1 h 24 min
15:36Major incident
Slower job processing on e2-standard agent types Vendor status page⁠ (opens in new tab)

Wednesday, July 3, 2024

1 incident, 1 major or critical

Major, 38 min
08:47Major incident
Delays in job processing on Semaphore Vendor status page⁠ (opens in new tab)

Thursday, June 27, 2024

2 incidents

Minor, 1 h 15 min
15:46Minor incident
Delays in Job Processing Vendor status page⁠ (opens in new tab)
Minor, 1 h 29 min
10:29Minor incident
Elevated error rates on the "Plans & Billing" page Vendor status page⁠ (opens in new tab)

Monday, May 6, 2024

2 incidents

Minor, 1 h 1 min
12:11Minor incident
Elevated API error responses Vendor status page⁠ (opens in new tab)
Minor, 1 h 5 min
10:49Minor incident
Elevated API error responses Vendor status page⁠ (opens in new tab)

Monday, April 29, 2024

1 incident, 1 major or critical

Major, 1 h 41 min
14:05Major incident
Delays in Job Processing Vendor status page⁠ (opens in new tab)

Friday, April 26, 2024

1 incident, 1 major or critical

Major, 41 min
10:35Major incident
Elevated error rates on Semaphore Vendor status page⁠ (opens in new tab)

Thursday, April 25, 2024

2 incidents

Minor, 4 h 53 min
11:06Minor incident
Degraded performance of the Flaky Tests feature Vendor status page⁠ (opens in new tab)
Minor, 2 h 15 min
07:21Minor incident
Degraded performance of the Flaky Tests feature Vendor status page⁠ (opens in new tab)

Wednesday, April 10, 2024

1 incident, 1 major or critical

Major, under a minute
12:00Major incident
Job processing issues Vendor status page⁠ (opens in new tab)

Thursday, March 28, 2024

1 incident, 1 major or critical

Major, 1 h 4 min
11:34Major incident
Linux Arm-based Build Server Issues Vendor status page⁠ (opens in new tab)

Tuesday, March 19, 2024

1 incident, 1 major or critical

Major, 1 h 8 min
18:05Major incident
Issues with sem debug and sem attach Vendor status page⁠ (opens in new tab)

Friday, March 15, 2024

1 incident

Minor, 34 min
18:03Minor incident
Elevated Level of Errors Vendor status page⁠ (opens in new tab)

Wednesday, March 13, 2024

1 incident

Minor, 1 h 24 min
18:03Minor incident
Elevated Errors Vendor status page⁠ (opens in new tab)

Thursday, February 15, 2024

1 incident, 1 major or critical

Major, 31 min
12:22Major incident
Elevated error rates on Semaphore Vendor status page⁠ (opens in new tab)

Tuesday, February 13, 2024

1 incident

Minor, 40 min
15:53Minor incident
Semaphore UI Issues Vendor status page⁠ (opens in new tab)

Friday, February 2, 2024

1 incident, 1 major or critical

Major, 1 h 5 min
12:22Major incident
Elevated error rates on Semaphore Vendor status page⁠ (opens in new tab)

Saturday, December 2, 2023

1 incident, 1 major or critical

Major, 1 h 6 min
05:43Major incident
Delays in job processing on Semaphore 2.0 Vendor status page⁠ (opens in new tab)

Tuesday, November 14, 2023

1 incident

Minor, 45 min
11:06Minor incident
User Interface Issue Vendor status page⁠ (opens in new tab)

Thursday, November 2, 2023

1 incident, 1 major or critical

Major, 42 min
18:09Major incident
Workflow issues Vendor status page⁠ (opens in new tab)

Monday, October 30, 2023

1 incident, 1 major or critical

Major, 42 min
01:18Major incident
Delays in job processing Vendor status page⁠ (opens in new tab)

Friday, October 27, 2023

1 incident, 1 major or critical

Major, 53 min
15:21Major incident
Trouble with loading logs for finished jobs Vendor status page⁠ (opens in new tab)

Wednesday, September 6, 2023

1 incident

Minor, 34 min
14:48Minor incident
BitBucket integration not operational Vendor status page⁠ (opens in new tab)

Semaphore incidents, last 90 days JSON Markdown