Sinch Outage History

Sinch's DI SMS 365 service experienced potential delays in the delivery of mobile originated (MO) messages, mobile terminated (MT) messages, and delivery reports (DLR) across their SMS 365 Operator services in the US, Rest of World, and International regions. The issue was detected by internal monitoring systems and affected message delivery processing for 32 minutes. The incident was resolved after technical teams investigated and implemented a fix.

Sinch experienced delivery issues with Telia Sweden affecting their SMPP EU service, causing delayed mobile-terminated and mobile-originated messages along with missing or late delivery receipts. The incident occurred on April 24, 2026 from 08:21 to 09:20 UTC, lasting approximately 1 hour. The service was fully restored and the incident was resolved by 10:11 UTC.

Sinch experienced delivery issues with Telia Norway affecting their SMPP - EU component from 08:21 to 11:28 UTC on April 24, 2026. The incident caused delayed mobile-terminated and mobile-originated messages, along with missing or late delivery receipts for users in Norway. The service was fully restored after approximately 2.7 hours.

Sinch's DI SMS 365 (iSMS) platform experienced delays in message delivery for both mobile terminating and mobile originated traffic, as well as delivery receipt notifications, lasting 5.6 hours from April 23, 2026 17:10 GMT to 23:11 GMT. The issue was detected through internal monitoring and affected customers connected to the iSMS platform. The incident was resolved and normal message processing without delays was confirmed through monitoring.

Sinch experienced SMS delivery issues specifically affecting AT&T customers in Mexico, causing delayed mobile-terminated and mobile-originated messages along with missing or late delivery receipts. The incident impacted the SMS - LATAM service component for approximately 1.7 hours from 15:45 UTC to 17:44 UTC on April 23, 2026. The service was fully restored and the incident was resolved by 18:10 UTC the same day.

Sinch experienced SMS delivery issues in Uruguay through the Antel carrier, causing delayed or failed message delivery, delayed incoming messages, and missing or late delivery receipts. The incident affected SMS services in the LATAM region and lasted approximately 4 hours from 13:35 to 17:34 UTC on April 23, 2026. The service was fully restored and the incident was resolved.

Sinch experienced SMS delivery issues with the O2 network in the UK from 11:16 to 12:35 UTC on April 23, 2026. The incident caused delayed mobile-terminated and mobile-originated messages, along with missing or late delivery receipts for SMS services in the EMEA region. The issue was resolved after approximately 1.4 hours.

Sinch experienced performance degradation on their EU3 endpoint affecting HTTP, SMPP, and ENUM services in the EU region for 2.6 hours. Clients were advised to temporarily use the EU1 endpoint as a workaround during the incident. A fix was implemented and the service was restored to normal operation.

Sinch experienced a major outage affecting the Conversation API SMS channel in the US region from 13:20 to 15:00 UTC on April 22, 2026. SMS requests routed through the conversation API were rejected or throttled during the 56-minute incident. The issue was resolved after implementing a fix and monitoring the results.

Sinch experienced a major outage affecting Chatlayer services in the US region, impacting Channels, Bot Engine, and the Web User Interface. The incident lasted 6.1 hours, starting at 13:49 UTC on April 22, 2026, with services restored by 19:10 UTC the same day. After restoration, the team continued monitoring to ensure all systems were functioning properly before fully resolving the incident.