# Customer.io incident history - **Customer.io**: [Customer.io UI is currently unavailable for some customers](https://down.guide/customerio/DWN-e2b6d5f055) (Degraded; lasted 25m; started 2026-10-27 19:11 UTC; Management Interface) - **Customer.io**: [Some US customers may experience delays in message sending](https://down.guide/customerio/DWN-28ecf849ec) (Degraded; lasted 27m; started 2026-09-19 22:50 UTC; Message Sending; us) - **Customer.io**: [Reduced Deliverability to Microsoft-Hosted Email Addresses](https://down.guide/customerio/DWN-1ca6244164) (Degraded; lasted 1h 19m; started 2026-09-04 12:16 UTC; Message Sending) - **Customer.io**: [Investigating issues with the Agent](https://down.guide/customerio/DWN-3d99d4398b) (Degraded; lasted 5m; started 2026-09-03 17:29 UTC) - **Customer.io**: [Customer.io UI is inaccessible](https://down.guide/customerio/DWN-5a78799127) (Degraded; lasted 26m; started 2026-08-05 17:36 UTC; Management Interface) - **Customer.io**: [Delays in processing and UI inaccessible for some customers in the US datacentre](https://down.guide/customerio/DWN-767e8b13c9) (Degraded; lasted 33m; started 2026-08-03 07:08 UTC; Data Processing, Management Interface; us) - **Customer.io**: [Issues accessing EU accounts](https://down.guide/customerio/DWN-f880e57cf1) (Partial outage; lasted 15m; started 2026-07-31 14:24 UTC; Management Interface; eu) - **Customer.io**: [Some EU users are experiencing delays in processing](https://down.guide/customerio/DWN-2411dd2d9e) (Degraded; lasted 1h 37m; started 2026-07-23 08:27 UTC; Data Processing, Management Interface; eu) - **Customer.io**: [Some customers are experiencing data processing and message-sending delays](https://down.guide/customerio/DWN-d85ff0d9fd) (Degraded; lasted 1h 23m; started 2026-07-20 21:35 UTC; Data Processing, Message Sending; us) - **Customer.io**: [Delays in message sending](https://down.guide/customerio/DWN-47a5692b01) (Partial outage; lasted 40m; started 2026-07-20 17:07 UTC; Message Sending; eu, us) - **Customer.io**: [Some customers are experiencing data processing delays](https://down.guide/customerio/DWN-44856f22fe) (Degraded; lasted 2h 26m; started 2026-07-15 17:19 UTC; Data Processing; eu) - **Customer.io**: [Delays processing send events in some environments](https://down.guide/customerio/DWN-8a13784a3a) (Degraded; lasted 41m; started 2026-07-10 17:28 UTC; Message Sending) - **Customer.io**: [User Interface is currently unavailable for some users in EU. Data processing delays](https://down.guide/customerio/DWN-8dec01588d) (Degraded; lasted 2h 3m; started 2026-07-03 09:07 UTC; Data Processing, Management Interface; eu) - **Customer.io**: [User Interface is currently unavailable, data processing delays](https://down.guide/customerio/DWN-0db45fc623) (Degraded; lasted 25m; started 2026-07-02 13:51 UTC; Data Processing, Management Interface) - **Customer.io**: [Some customers are currently unable to access the account Billing page in our UI](https://down.guide/customerio/DWN-515011168e) (Degraded; lasted 28m; started 2026-06-18 20:06 UTC; Management Interface) - **Customer.io**: [Investigating Connectivity Issues](https://down.guide/customerio/DWN-bc802d43a9) (Partial outage; lasted 2h 42m; started 2026-06-13 21:18 UTC) - **Customer.io**: [Delays in processing requests](https://down.guide/customerio/DWN-e35ac67125) (Degraded; lasted 32m; started 2026-06-10 04:45 UTC; Data Processing, Message Sending; eu, us) - **Customer.io**: [AI Agent and LLM Campaign Actions Disruption](https://down.guide/customerio/DWN-7870b6d3ef) (Degraded; lasted 1h 7m; started 2026-06-09 15:49 UTC) - **Customer.io**: [Some customers seeing delays setting up Pipelines in new EU workspaces](https://down.guide/customerio/DWN-4dcb1010e5) (Degraded; lasted 1h 4m; started 2026-06-05 12:30 UTC; Management Interface; eu) - **Customer.io**: [Salesforce and Hubspot syncs might be delayed for some EU customers](https://down.guide/customerio/DWN-8ea2480997) (Degraded; lasted 1h 25m; started 2026-06-04 23:50 UTC; Data Processing; eu) - **Customer.io**: [Customer.io UI is currently inaccessible](https://down.guide/customerio/DWN-c3cf6d9ee9) (Degraded; lasted 8m; started 2026-06-04 13:34 UTC; Management Interface) - **Customer.io**: [UI inaccessible](https://down.guide/customerio/DWN-2f170d9e75) (Partial outage; lasted 1h 39m; started 2026-06-02 21:18 UTC; Management Interface) - **Customer.io**: [Reverse ETL Syncs not being run for some EU Customers](https://down.guide/customerio/DWN-2797094fba) (Degraded; lasted 31m; started 2026-06-01 11:40 UTC; Data Processing; eu) - **Customer.io**: [Some customers are seeing broadcast delivery delays (emails, push notifications, and webhooks)](https://down.guide/customerio/DWN-dd275786c1) (Degraded; lasted 42m; started 2026-05-29 16:26 UTC; Message Sending) - **Customer.io**: [Customers in the EU region may experience delays in message sending](https://down.guide/customerio/DWN-a01032d68c) (Degraded; lasted 43m; started 2026-05-25 15:27 UTC; Message Sending; eu) - **Customer.io**: [Some customers in our EU region may experience errors and delays](https://down.guide/customerio/DWN-9ae641c0ec) (Degraded; lasted 26m; started 2026-05-06 16:00 UTC; Data Collection, Data Processing, Management Interface; eu) - **Customer.io**: [Delay in Salesforce & Hubspot data-in integrations](https://down.guide/customerio/DWN-8b1752f8e0) (Partial outage; lasted 14m; started 2026-04-20 19:52 UTC; Data Processing; us) - **Customer.io**: [Customer.io UI is currently unavailable for some customers](https://down.guide/customerio/DWN-43464943de) (Degraded; lasted 10m; started 2026-04-20 16:45 UTC; Management Interface) - **Customer.io**: [Some customers in our EU region may experience errors and delays](https://down.guide/customerio/DWN-8c8af7bc1e) (Degraded; lasted 9m; started 2026-04-17 20:07 UTC; Data Collection, Data Processing, Management Interface; eu) - **Customer.io**: [Customer.io UI currently experiencing issues](https://down.guide/customerio/DWN-a957d4daf8) (Degraded; lasted 0m; started 2026-04-16 21:30 UTC) - **Customer.io**: [Unable to create event-driven campaigns](https://down.guide/customerio/DWN-b5907c66f3) (Degraded; lasted 0m; started 2026-04-15 21:06 UTC) - **Customer.io**: [Integration Destinations UI Disruption](https://down.guide/customerio/DWN-e87f05eba4) (Partial outage; lasted 5m; started 2026-04-13 18:26 UTC; Management Interface; eu, us) - **Customer.io**: [EU Region API Processing Delays](https://down.guide/customerio/DWN-0999480b99) (Degraded; lasted 4h 7m; started 2026-04-07 16:46 UTC; Data Processing; eu) - **Customer.io**: [Some customers in our EU region may experience errors and delays](https://down.guide/customerio/DWN-b1d7978bc1) (Degraded; lasted 0m; started 2026-03-26 19:04 UTC; eu) - **Customer.io**: [UI Errors Identified](https://down.guide/customerio/DWN-33bc0afe7b) (Degraded; lasted 0m; started 2026-03-18 19:09 UTC; Management Interface) - **Customer.io**: [Domain Verification Currently Unavailable](https://down.guide/customerio/DWN-2bcde8aaf1) (Degraded; lasted 25m; started 2026-03-16 09:30 UTC; Management Interface) - **Customer.io**: [Some customers in our US region may experience errors and delays](https://down.guide/customerio/DWN-6bafa81136) (Degraded; lasted 31m; started 2026-02-23 20:11 UTC; Data Processing, Message Sending; us) - **Customer.io**: [Some customers in our EU region may experience errors and delays](https://down.guide/customerio/DWN-8955f50f4f) (Degraded; lasted 8m; started 2026-02-19 14:35 UTC; Data Processing, Message Sending; eu) - **Customer.io**: [Reverse ETL syncs may experience delays in US](https://down.guide/customerio/DWN-8e0da4920a) (Degraded; lasted 21m; started 2026-02-13 22:42 UTC; us) - **Customer.io**: [Some customers are experiencing delays with message sending](https://down.guide/customerio/DWN-3bd782ff18) (Degraded; lasted 29m; started 2026-01-28 18:56 UTC; Message Sending) - **Customer.io**: [Issue with downloading exports from our App API](https://down.guide/customerio/DWN-cb42bc0908) (Degraded; lasted 11m; started 2026-01-21 20:45 UTC) - **Customer.io**: [Delays with Salesforce Syncs](https://down.guide/customerio/DWN-9e0f1e8184) (Degraded; lasted 0m; started 2026-01-14 16:34 UTC; Data Processing) - **Customer.io**: [Customers may be impacted by data delays](https://down.guide/customerio/DWN-8b206fbe38) (Degraded; lasted 1h 31m; started 2025-12-13 12:06 UTC; Data Processing; us) - **Customer.io**: [Some customers are experiencing issues with saving their content](https://down.guide/customerio/DWN-ccfd07e2ca) (Degraded; lasted 18m; started 2025-12-12 17:07 UTC; Management Interface) - **Customer.io**: [Intermittent issues loading the in-app message editor.](https://down.guide/customerio/DWN-ed5e4d9943) (Degraded; lasted 41m; started 2025-12-09 14:20 UTC; Management Interface) - **Customer.io**: [Customers may be impacted by data delays](https://down.guide/customerio/DWN-ced605e36c) (Degraded; lasted 2h 6m; started 2025-12-08 18:12 UTC; Data Processing, Message Sending) - **Customer.io**: [Trouble loading User Interface in some workspace](https://down.guide/customerio/DWN-e74a13fe03) (Degraded; lasted 55m; started 2025-11-24 17:20 UTC; Management Interface) - **Customer.io**: [US infrastructure delays with a subset of deliveries sending](https://down.guide/customerio/DWN-cdd5e87f43) (Degraded; lasted 37m; started 2025-11-24 08:15 UTC; Message Sending; us) - **Customer.io**: [Forms submissions experiencing intermittent delays](https://down.guide/customerio/DWN-4c0b182eb1) (Degraded; lasted 1h 23m; started 2025-11-21 11:46 UTC; Data Processing; eu, us) - **Customer.io**: [Legacy in-app editing, delays receiving in-app messages and Journeys domain verification with Cloudflare](https://down.guide/customerio/DWN-780ba7cf42) (Degraded; lasted 2h 23m; started 2025-11-18 12:28 UTC; Management Interface) [Back to Customer.io](https://down.guide/customerio) --- down.guide reads providers' official status pages every minute and adds its own evidence, always labeled. Free, no account. Agents: MCP at https://down.guide/mcp, REST at https://down.guide/api/v1, feeds at https://down.guide/feed. Built by Sazabi (https://sazabi.com/?utm_source=down-guide&utm_medium=markdown).