Check if Customer.io Message Sending is down, recent outages, user-reported issues, and outages map.
Customer.io Message Sending is working normally
Last checked from Customer.io's status page
This chart displays the number of user-reported issues over the past 24 hours, grouped into 20-minute intervals. It's normal to see occasional reports, which may be due to individual user issues rather than a broader problem. We only consider an issue widespread if there are multiple reports within a short timeframe.
IsDown has tracked 44 incidents for Customer.io Message Sending since started monitoring Customer.io status in April 2020. We collect data from 4400+ services, and normalize the data to give you a clear picture of the impact of the outage.
about 2 months ago · lasted about 9 hours
Our team has identified an issue that is causing some messaging to encounter delays. Our team is currently working on a fix
4 months ago · lasted 44 minutes
A small proportion of customers may experience degraded capabilities for data ingestion and customer initiated actions for your service.
4 months ago · lasted 20 minutes
Some customers in the US datacenter are experiencing delays in message sending and may experience interruptions when using the user interface or APIs. The team has identified the issue and are working towards a solution.
We've tracked and collected 44 incidents for Customer.io Message Sending since started monitoring Customer.io status
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Stay Ahead of Customer.io Outages
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Services commonly monitored together with Customer.io
Customer.io Message Sending isn't down. You can check Customer.io Message Sending status and incident details on the top of the page. IsDown continuously monitors Customer.io Message Sending official status page every few minutes. In the last 24 hours, there were 0 outages reported.
Customer.io Message Sending is currently operational. You can check Customer.io Message Sending status and incident details on the top of the page. The status is updated in almost real-time, and you can see the latest outages and issues affecting customers.
No, there is no ongoing official outage. Check on the top of the page if there are any reported problems by other users.
Currently there's no report of Customer.io Message Sending being slow. Check on the top of the page if there are any reported problems by other users.
IsDown monitors the Customer.io Message Sending official status page every few minutes. We also get reports from users like you. If there are enough reports about an outage, we'll show it on the top of the page.
Customer.io Message Sending last outage was on July 18, 2025 with the title "Some customers on the US Data Center may experience Message Delays."
IsDown and DownDetector help users determine if a service is having problems. The big difference is that IsDown is a status page aggregator. IsDown monitors a service's official status page to give our customers a more reliable source of information. The integration allows us to provide more details about the outage, like incident title, description, updates, and the parts of the affected service. Additionally, users can create internal status pages and set up notifications for all their third-party services.
IsDown offers an easy way to monitor Customer.io with maximum flexibility
IsDown monitors Message Sending for major outages. A major outage is when Message Sending experiences a critical issue that severely affects one or more services/regions. When Customer.io marks an incident as a major outage, IsDown updates its internal status, the customer status page and dashboard. Depending on the customer settings, IsDown will also send notifications.
IsDown monitors Customer.io status page for minor outages. A minor outage is when Message Sending experiences a small issue affecting a small percentage of its customer's applications. An example is the performance degradation of an application. When a minor outage occurs, IsDown updates its internal status and shares that information on the customer status page. Depending on the customer settings, IsDown will also send notifications.
IsDown collects all information from the outages published in Customer.io status page to provide the most accurate information. If available, we gather the title, description, time of the outage, status, and outage updates. Another important piece of information is the affected services/regions which we use to filter the notifications that impact your business.
Customer.io publishes scheduled maintenance events on their status page. IsDown collects all the information for each event and creates a feed that people can follow to ensure they are not surprised by unexpected downtime or problems. We also send the feed in our weekly report, alerting the next maintenances that will take place.
IsDown monitors Customer.io and all their 15 components that can be affected by an outage. IsDown allows you to filter the notifications and status page alerts based on the components you care about. For example, you can choose which components or regions affect your business and filter out all other outages. This way you avoid alert fatigue in your team.
Customer.io and other vendors don’t always report outages on time. Our crowdsourced status platform helps you stay ahead of outages. Users report issues and outages, sharing details on what problems they are facing. We use that info to provide early signs of outages. This way, even without an official update, you can stay ahead of possible problems.
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