Twilio Outage History

Twilio experienced a 52-minute service incident where customers were unable to retrieve transcripts due to failures in the Conversation Intelligence v2 DynamoDB and Transcript Store services. The issue affected transcript retrieval functionality between 15:04 and 15:46 UTC, preventing users from accessing their conversation transcripts. Engineers resolved the underlying database and storage service problems, restoring normal transcript retrieval operations.

Twilio experienced SMS delivery delays from a subset of short codes to multiple mobile networks in the United States, initially affecting T-Mobile subscribers before expanding to other carriers. The issue impacted SMS short code services in North America for 1.3 hours. Twilio's team identified the root cause and restored normal SMS delivery operations.

Twilio experienced SMS delivery delays to Tigo network subscribers in Honduras for 2.9 hours. The issue affected SMS services in the Latin America region, causing delayed message delivery for customers sending to that specific carrier network. The incident was resolved after the team observed recovery and confirmed normal SMS delivery operations were restored.

Twilio experienced delays in RCS and WhatsApp message delivery for 1.7 hours, causing messages to queue longer than expected. Customers encountered delayed message transmission during this period. The issue was resolved and message delivery returned to normal operations.

Twilio experienced an 18.3-hour outage affecting their billing system, where customer low balance notifications failed to send and automatic balance recharge functionality stopped working, preventing credit cards from being charged for pay-as-you-go services. Engineers identified the root cause and implemented a fix, with billing processing returning to normal operation. The issue was fully resolved after an extended monitoring period to ensure system stability.

Twilio experienced SMS delivery delays from a subset of short codes to C-Spire network subscribers in the United States for 6.9 hours. The issue affected SMS Short Code services in North America, causing delayed message delivery to customers on the C-Spire network. Twilio identified the root cause and resolved the incident, with SMS delivery returning to normal operations.

Twilio experienced voice call failures affecting calls from network subscribers in Peru to a subset of Twilio Peru phone numbers, impacting the Voice service in Latin America. The incident lasted 1.8 hours, during which customers were unable to complete certain inbound calls from Peru. The issue was resolved and voice calls returned to normal operation.

Twilio experienced SMS delivery failures from a subset of toll-free numbers to United States recipients over a 7.9-hour period. The issue affected SMS Toll-Free services in North America, with the team identifying the cause and working on resolution throughout the incident. Upon completion of their investigation, Twilio determined that the event resulted in no actual customer impact and all systems returned to normal operation.

Twilio experienced SMS delivery delays to Vodafone Germany network subscribers for 4.6 hours, affecting customers sending messages through Twilio's SMS service in Europe. The team identified the root cause and worked to resolve the connectivity issue between Twilio and Vodafone's network. Service was restored to normal operation after monitoring confirmed stable SMS delivery.

Twilio experienced SMS delivery delays and failures for messages sent to Djibouti Telecom (Evatis) network subscribers in Djibouti, affecting customers using Twilio phone numbers. The incident lasted approximately 19.8 hours, impacting SMS services in the Middle East & Africa region. The issue was resolved and SMS delivery to the affected network returned to normal operation.