Customer.io had 62 outages in the last 2 years totaling 22h 22m of downtime — averaging 2.5 incidents per month.
There were 62 Customer.io outages since August 18, 2025 totaling 22h 22m of downtime. Each is summarised below — incident details, duration, and resolution information.
We are currently investigating this issue.
A fix has been implemented and we are monitoring the results.
We are continuing to monitor for any further issues.
This incident has been resolved.
Our team is currently investigating an issue that is causing some delays in data processing. This impacts a small subset of customers in the US datacentre.
We are continuing to investigate this issue.
This incident has been resolved. Thanks for your patience.
We are currently investigating an issue impacting access to EU accounts and API access. There is no impact with data processing or data loss.
The issue has been identified and a fix is being implemented.
A fix has been implemented and we are monitoring the results.
This incident is resolved.
Our team is looking into a problem affecting UI slowness and processing delays for some EU customers.
A fix has been implemented and we are monitoring the results. Thanks for your patience and we'll continue to update as we make progress
A fix has been deployed, and we are recovering any delayed backlogs. We are continuing to monitor the results.
This incident has been resolved. Thanks a lot for your patience while we worked on a fix here.
Our engineers are currently looking into an issue that is causing data processing and message-sending delays for a small subset of customers in the US region. We apologise for any inconvenience caused.
The issue has been identified and we're working on a fix. Thank you for your patience.
A fix has been deployed, and we are processing any delayed backlogs. We are continuing to monitor the results.
This incident has been resolved and all backlogs have been processed.
Our team is currently investigating an issue delaying message sending in the US and EU regions
A fix has been implemented and we're monitoring the results.
This incident has been resolved.
Our engineers are currently looking into an issue that is causing data processing delays for some customers in our EU region. Thank you for patience and we apologize for the inconvenience.
We've identified the cause of the event processing delays and our team is working on a fix. Thank you for your patience and we'll update again as we make progress.
A fix has been implemented and we are monitoring the results.
This incident is resolved. Thank you for your patience!
We're monitoring increased load on our backend that is causing a delay in processing sends. We are actively monitoring the issue and will share updates accordingly.
A fix has been deployed and we are processing through any delay backlogs. We are continuing to monitor but expect delays to reduce shortly.
This incident has been resolved and any delays have been fully mitigated.
Our team is currently investigating an issue where the Customer.io dashboard (fly.customer.io) is unavailable for some users in EU. We're also looking into potential data processing delays.
The Customer.io UI is back online. We're continuing to work on system stability to confirm the issue is fully resolved. Processing is recovering but still delayed
Processing is actively recovering. We apologize for the disruption this caused and will continue monitoring until it's fully caught up.
This incident has been resolved. The Customer.io UI is available, and data processing has recovered to normal operating levels. We will continue internal follow-up and remediation work. Thank you for your patience.
Our team is currently investigating an issue where the Customer.io dashboard (fly.customer.io) is unavailable. We're also looking into potential data processing delays.
The UI is back up and delays are actively recovering. We sincerely apologize for the inconvenience and appreciate your patience.
This incident has been resolved.
We're looking into an issue where https://fly.customer.io/settings/billing/ isn't loading for some customers. We apologize for the inconvenience.
We've identified the issue and access to the Billing page has been restored. We thank you for your patience!
This incident has been resolved.
We are aware of an issue affecting access to our web application. Customers may encounter ERR_CONNECTION_REFUSED when attempting to access the UI. At this time, we are not aware of any impact beyond UI accessibility. Message processing and delivery continue to operate normally. Our team is actively investigating the issue and working to restore full service as quickly as possible. We will provide updates as more information becomes available.
The team has identified the issue and is actively working on a fix
A fix has been implemented and the systems are recovering. We are monitoring UI for any other issue.
This incident has been resolved.
Our team is aware of an issue affecting Customer IO EU and US systems . We are looking into this and gathering more details.
Identified the issue, still processing backlog
5% of our customers could have experience delays up to 40minutes, but going forward everything is working correctly
This incident has been resolved.
We are currently investigating an issue affecting our AI Agent and LLM actions within campaigns. Some customers may be experiencing disruption or delays with these features. We will provide an update as soon as we have more information. Thank you for your patience!
Our engineers have identified the issue that is causing disruption. We are working on a resolution and will provide an update shortly. Thank you for your patience.
A fix has been implemented and we are monitoring the results.
This incident has been resolved. Thank you for your patience!
We are currently investigating a delay affecting the setup of Pipelines in newly created workspaces in our EU region. Customers creating new workspaces may experience longer than expected wait times before Pipelines become available. Our team is actively working on this and we will post another update shortly. Thank you for your patience.
A fix has been implemented and we are monitoring the results.
This incident has been resolved.
We've identified an issue affecting some EU customers' Salesforce and Hubspot syncs. Our team is working on a fix.
We have rolled out a fix and we're monitoring closely.
We confirm the incident is resolved. Thank you for your patience!
Our team is aware of this issue and are digging into it right now. We apologize for the inconvenience and will be back with an update as soon as possible.
We've got a fix in place, and the UI is available once again. Thank you for your patience!
This incident has been resolved.
Our team is aware of an issue affecting access to the Customer.io UI. Our team is working to identify the cause.
A fix has been deployed for the issue affecting access to the UI. We are monitoring performance and customer feedback.
Our team has identified additional UI-related issues affecting some customers. We are working on a fix now.
We have rolled out a fix for the remaining UI-related issues and are watching system behavior closely.
The issues affecting the UI have been resolved, and the system is functioning normally.
We are currently investigating an issue affecting Reverse ETL syncs for some EU customers.
A fix has been deployed for the issue affecting Reverse ETL syncs in EU workspaces. We are continuing to monitor this.
We have confirmed that the incident has been resolved and all Reverse ETL syncs are running as expected. Thanks for your patience!
Our engineers are aware of an issue where messages may be showing as "queued". We're investigating this now. Thank you for your patience!
We've identified the issue and are working towards a resolution now.
We have a resolution in place and are monitoring message throughput recovery now. Thank you for your patience!
We have confirmed that this incident is now resolved. Thank you very much for your patience!
We are currently investigating this issue.
A fix has been implemented and we are monitoring the results.
This incident has been resolved.
Our engineers are looking into an issue where some workspaces aren't loading as expected. Processing and deliveries may be delayed. We're working to get this resolved and will post an update soon. Thank you for your patience!
The UI is available as expected, and we are monitoring before marking this as fully resolved. Thank you again for your patience!
This incident has been resolved.
We are currently investigating an issue impacting Salesforce and Hubspot data-in integrations in the US region.
We have identified the issue, released a fix, and are currently monitoring integrations.
This incident has been resolved.
Our engineers are looking into an issue where some workspaces aren't loading as expected. We're working to get this resolved and will post an update soon. Thank you for your patience!
The UI is available as expected, and we are monitoring before marking this as fully resolved. Thank you again for your patience!
This incident is now resolved. Thank you for your patience and understanding!
Customers who are currently working in our UI are likely to have seen elevated errors or loading. Our engineers are aware, investigated, and have resolved this issue. Thank you for your patience and understanding!