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One Signal Outage History

Every past One Signal outage tracked by IsDown, with detection times, duration, and resolution details.

There were 431 One Signal outages since February 2019. The 51 outages from the last 12 months are summarized below, with incident details, duration, and resolution information.

Minor April 13, 2026

April 2026: [Database connectivity] - [Dashboard users]

Detected Apr 13, 2026 6:00 PM EDT · Resolved Apr 13, 2026 6:08 PM EDT · Duration 9 minutes

OneSignal experienced database connectivity issues that caused degraded dashboard performance and potential delivery failures for dashboard users. The service team applied a mitigation to resolve the impact and monitored its effectiveness. The incident lasted 9 minutes and was classified as minor severity.

Minor April 9, 2026

April 2026: Elevated errors while displaying app metrics

Detected Apr 9, 2026 2:58 PM EDT · Resolved Apr 9, 2026 3:56 PM EDT · Duration about 1 hour

OneSignal experienced a 58-minute incident where some customers encountered errors while loading app metrics on the analytics dashboard. The engineering team applied a mitigation to resolve the issue and monitored the systems until confirming full operational status. All systems returned to normal operation with no ongoing impact.

Major April 9, 2026

April 2026: Dashboard and API outage

Detected Apr 9, 2026 10:46 AM EDT · Resolved Apr 9, 2026 11:07 AM EDT · Duration 21 minutes

OneSignal experienced a major outage affecting their dashboard and API services, causing errors for all customers attempting to access these systems. The incident lasted 21 minutes, during which the team identified the root cause and applied a mitigation to resolve the impact. The service was restored and monitored to confirm the fix was effective.

Minor April 9, 2026

April 2026: Dashboard - API latency increases

Detected Apr 9, 2026 10:20 AM EDT · Resolved Apr 9, 2026 11:07 AM EDT · Duration about 1 hour

OneSignal experienced increased latency across their Dashboard and API services, affecting all customers for 47 minutes. The engineering team identified the root cause and deployed a resolution. The services were restored to normal performance and the team continued monitoring to ensure stability.

Minor March 20, 2026

March 2026: Intermittent errors from Notification Create endpoint

Detected Mar 20, 2026 4:13 PM EDT · Resolved Mar 20, 2026 5:05 PM EDT · Duration about 1 hour

OneSignal's Notification Create endpoint experienced elevated HTTP 500 error rates for 52 minutes, causing failures when customers attempted to create new notifications through the public API. The engineering team resolved the issue by rolling over faulty pods while investigating the root cause.

Major March 20, 2026

March 2026: Email deliveries are experiencing delays and potential failures

Detected Mar 20, 2026 1:25 PM EDT · Resolved Mar 20, 2026 4:29 PM EDT · Duration about 3 hours

OneSignal experienced email delivery delays and failures for 3.1 hours due to an unhealthy notifications API instance that caused 27 delivery jobs to become stuck in a terminating state. The incident began with increased lag in email deliveries around 9am and escalated to completely stuck delivery jobs that were not processing. The team identified the root cause, worked to retry the failed deliveries, and restored normal email delivery functionality.

Minor March 13, 2026

March 2026: Data feeds - Processing delays

Detected Mar 13, 2026 12:10 PM EDT · Resolved Mar 13, 2026 12:30 PM EDT · Duration 21 minutes

One Signal experienced 1-hour delays in processing data feeds, affecting customers with journeys that rely on data feeds. The service applied a mitigation after 21 minutes and was monitoring to confirm the resolution's effectiveness.

Minor February 25, 2026

February 2026: Some apps may have experienced

Detected Feb 25, 2026 2:05 PM EST · Resolved Feb 25, 2026 2:10 PM EST · Duration 5 minutes

Between 16:54 UTC and 17:03 UTC, OneSignal APIs experienced errors and degraded performance, specifically affecting customers with app IDs beginning with the prefix "c". The systems automatically recovered after 9 minutes, and additional mitigation measures were implemented to prevent recurrence.