Customer.io Outage History
Customer.io is up right nowPingoru has recorded 67 incidents for Customer.io: 57 in the last 12 months and 6 in the last 90 days.
Show as a table
| Month | Incidents | Hours with an open incident |
|---|---|---|
| April 2026 | 7 | 5 of 720 (1%) |
| May 2026 | 3 | 2 of 744 (0%) |
| June 2026 | 9 | 10 of 720 (1%) |
| July 2026 | 8 | 10 of 744 (1%) |
| August 2026 | 2 | 1 of 744 (0%) |
| September 2026 | 3 | 2 of 720 (0%) |
| October 2026 | 0 | 0 of 539 (0%) |
Incidents, newest first
Minor September 19, 2026 Some US customers may experience delays in message sending 27m Message Sending
Started Sep 19, 2026, 10:50 PM UTC· resolved Sep 19, 2026, 11:17 PM UTC
- investigating Sep 19, 2026, 10:50 PM UTC
We are currently investigating this issue.
- identified Sep 19, 2026, 10:52 PM UTC
The issue has been identified and a fix is being implemented.
- monitoring Sep 19, 2026, 11:10 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Sep 19, 2026, 11:17 PM UTC
This incident has been resolved.
Notice September 4, 2026 Reduced Deliverability to Microsoft-Hosted Email Addresses 1h 19m Message Sending
Started Sep 04, 2026, 12:16 PM UTC· resolved Sep 04, 2026, 01:35 PM UTC
- investigating Sep 04, 2026, 12:16 PM UTC
We are currently investigating reports of reduced deliverability affecting messages sent to Microsoft-hosted email addresses. Our team is actively looking into this and we will provide an update as soon as we have more information. Thank you for your patience!
- monitoring Sep 04, 2026, 12:30 PM UTC
Starting around 08:00 UTC, Microsoft began experiencing an incident causing an increased volume of deferred/bounced emails. We are actively monitoring the situation. No other email providers are currently affected.
- resolved Sep 04, 2026, 01:35 PM UTC
Microsoft has resolved the underlying issue, we are seeing deliveries to their services resume as normal. Earlier bounces will be retried accordingly. We appreciate your understanding and please do reach out to support if you need any further assistance.
Minor September 3, 2026 Investigating issues with the Agent 4m
Started Sep 03, 2026, 05:29 PM UTC· resolved Sep 03, 2026, 05:34 PM UTC
- identified Sep 03, 2026, 05:29 PM UTC
Our team has found an issue causing degraded experiences for interactions with the Agent within customer.io. We are working on a fix now.
- monitoring Sep 03, 2026, 05:32 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Sep 03, 2026, 05:34 PM UTC
This incident has been resolved.
Notice August 5, 2026 Customer.io UI is inaccessible 26m Management Interface
Started Aug 05, 2026, 05:36 PM UTC· resolved Aug 05, 2026, 06:02 PM UTC
- investigating Aug 05, 2026, 05:36 PM UTC
We are currently investigating this issue.
- monitoring Aug 05, 2026, 05:44 PM UTC
A fix has been implemented and we are monitoring the results.
- monitoring Aug 05, 2026, 05:44 PM UTC
We are continuing to monitor for any further issues.
- resolved Aug 05, 2026, 06:02 PM UTC
This incident has been resolved.
Minor August 3, 2026 Delays in processing and UI inaccessible for some customers in the US datacentre 33m Data Processing, Management Interface
Started Aug 03, 2026, 07:08 AM UTC· resolved Aug 03, 2026, 07:42 AM UTC
- investigating Aug 03, 2026, 07:17 AM UTC
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.
- investigating Aug 03, 2026, 07:20 AM UTC
We are continuing to investigate this issue.
- resolved Aug 03, 2026, 07:42 AM UTC
This incident has been resolved. Thanks for your patience.
Major July 31, 2026 Issues accessing EU accounts 15m Management Interface
Started Jul 31, 2026, 02:24 PM UTC· resolved Jul 31, 2026, 02:39 PM UTC
- investigating Jul 31, 2026, 02:24 PM UTC
We are currently investigating an issue impacting access to EU accounts and API access. There is no impact with data processing or data loss.
- identified Jul 31, 2026, 02:29 PM UTC
The issue has been identified and a fix is being implemented.
- monitoring Jul 31, 2026, 02:33 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Jul 31, 2026, 02:39 PM UTC
This incident is resolved.
Minor July 23, 2026 Some EU users are experiencing delays in processing 1h 37m Data Processing, Management Interface
Started Jul 23, 2026, 08:27 AM UTC· resolved Jul 23, 2026, 10:04 AM UTC
- investigating Jul 23, 2026, 08:27 AM UTC
Our team is looking into a problem affecting UI slowness and processing delays for some EU customers.
- identified Jul 23, 2026, 09:16 AM UTC
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
- monitoring Jul 23, 2026, 09:29 AM UTC
A fix has been deployed, and we are recovering any delayed backlogs. We are continuing to monitor the results.
- resolved Jul 23, 2026, 10:04 AM UTC
This incident has been resolved. Thanks a lot for your patience while we worked on a fix here.
Minor July 20, 2026 Some customers are experiencing data processing and message-sending delays 1h 22m Data Processing, Message Sending
Started Jul 20, 2026, 09:35 PM UTC· resolved Jul 20, 2026, 10:58 PM UTC
- investigating Jul 20, 2026, 10:02 PM UTC
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.
- identified Jul 20, 2026, 10:29 PM UTC
The issue has been identified and we're working on a fix. Thank you for your patience.
- monitoring Jul 20, 2026, 10:38 PM UTC
A fix has been deployed, and we are processing any delayed backlogs. We are continuing to monitor the results.
- resolved Jul 20, 2026, 10:58 PM UTC
This incident has been resolved and all backlogs have been processed.
Major July 20, 2026 Delays in message sending 40m Message Sending
Started Jul 20, 2026, 05:07 PM UTC· resolved Jul 20, 2026, 05:47 PM UTC
- investigating Jul 20, 2026, 05:07 PM UTC
Our team is currently investigating an issue delaying message sending in the US and EU regions
- monitoring Jul 20, 2026, 05:41 PM UTC
A fix has been implemented and we're monitoring the results.
- resolved Jul 20, 2026, 05:47 PM UTC
This incident has been resolved.
Minor July 15, 2026 Some customers are experiencing data processing delays 2h 26m Data Processing
Started Jul 15, 2026, 05:19 PM UTC· resolved Jul 15, 2026, 07:46 PM UTC
- investigating Jul 15, 2026, 05:19 PM UTC
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.
- identified Jul 15, 2026, 05:35 PM UTC
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.
- monitoring Jul 15, 2026, 05:51 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Jul 15, 2026, 07:46 PM UTC
This incident is resolved. Thank you for your patience!
Notice July 10, 2026 Delays processing send events in some environments 40m Message Sending
Started Jul 10, 2026, 05:28 PM UTC· resolved Jul 10, 2026, 06:08 PM UTC
- identified Jul 10, 2026, 05:28 PM UTC
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.
- monitoring Jul 10, 2026, 05:45 PM UTC
A fix has been deployed and we are processing through any delay backlogs. We are continuing to monitor but expect delays to reduce shortly.
- resolved Jul 10, 2026, 06:08 PM UTC
This incident has been resolved and any delays have been fully mitigated.
Minor July 3, 2026 User Interface is currently unavailable for some users in EU. Data processing delays 2h 2m Data Processing, Management Interface
Started Jul 03, 2026, 09:07 AM UTC· resolved Jul 03, 2026, 11:09 AM UTC
- investigating Jul 03, 2026, 09:07 AM UTC
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.
- identified Jul 03, 2026, 09:44 AM UTC
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
- monitoring Jul 03, 2026, 10:25 AM UTC
Processing is actively recovering. We apologize for the disruption this caused and will continue monitoring until it's fully caught up.
- resolved Jul 03, 2026, 11:09 AM UTC
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.
Minor July 2, 2026 User Interface is currently unavailable, data processing delays 24m Data Processing, Management Interface
Started Jul 02, 2026, 01:51 PM UTC· resolved Jul 02, 2026, 02:16 PM UTC
- investigating Jul 02, 2026, 01:51 PM UTC
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.
- monitoring Jul 02, 2026, 01:59 PM UTC
The UI is back up and delays are actively recovering. We sincerely apologize for the inconvenience and appreciate your patience.
- resolved Jul 02, 2026, 02:16 PM UTC
This incident has been resolved.
Minor June 18, 2026 Some customers are currently unable to access the account Billing page in our UI 28m Management Interface
Started Jun 18, 2026, 08:06 PM UTC· resolved Jun 18, 2026, 08:34 PM UTC
- investigating Jun 18, 2026, 08:06 PM UTC
We're looking into an issue where https://fly.customer.io/settings/billing/ isn't loading for some customers. We apologize for the inconvenience.
- monitoring Jun 18, 2026, 08:29 PM UTC
We've identified the issue and access to the Billing page has been restored. We thank you for your patience!
- resolved Jun 18, 2026, 08:34 PM UTC
This incident has been resolved.
Major June 13, 2026 Investigating Connectivity Issues 2h 41m
Started Jun 13, 2026, 09:18 PM UTC· resolved Jun 14, 2026, 12:00 AM UTC
- investigating Jun 13, 2026, 09:18 PM UTC
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.
- identified Jun 13, 2026, 10:21 PM UTC
The team has identified the issue and is actively working on a fix
- monitoring Jun 13, 2026, 11:46 PM UTC
A fix has been implemented and the systems are recovering. We are monitoring UI for any other issue.
- resolved Jun 14, 2026, 12:00 AM UTC
This incident has been resolved.
Minor June 10, 2026 Delays in processing requests 32m Data Processing, Message Sending
Started Jun 10, 2026, 04:45 AM UTC· resolved Jun 10, 2026, 05:17 AM UTC
- investigating Jun 10, 2026, 04:45 AM UTC
Our team is aware of an issue affecting Customer IO EU and US systems . We are looking into this and gathering more details.
- investigating Jun 10, 2026, 04:56 AM UTC
Identified the issue, still processing backlog
- monitoring Jun 10, 2026, 05:15 AM UTC
5% of our customers could have experience delays up to 40minutes, but going forward everything is working correctly
- resolved Jun 10, 2026, 05:17 AM UTC
This incident has been resolved.
Notice June 9, 2026 AI Agent and LLM Campaign Actions Disruption 1h 7m
Started Jun 09, 2026, 03:49 PM UTC· resolved Jun 09, 2026, 04:56 PM UTC
- investigating Jun 09, 2026, 03:49 PM UTC
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!
- identified Jun 09, 2026, 04:33 PM UTC
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.
- monitoring Jun 09, 2026, 04:47 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Jun 09, 2026, 04:56 PM UTC
This incident has been resolved. Thank you for your patience!
Minor June 5, 2026 Some customers seeing delays setting up Pipelines in new EU workspaces 1h 4m Management Interface
Started Jun 05, 2026, 12:30 PM UTC· resolved Jun 05, 2026, 01:35 PM UTC
- investigating Jun 05, 2026, 12:57 PM UTC
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.
- monitoring Jun 05, 2026, 01:12 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Jun 05, 2026, 01:35 PM UTC
This incident has been resolved.
Minor June 4, 2026 Salesforce and Hubspot syncs might be delayed for some EU customers 1h 25m Data Processing
Started Jun 04, 2026, 11:50 PM UTC· resolved Jun 05, 2026, 01:15 AM UTC
- identified Jun 04, 2026, 11:50 PM UTC
We've identified an issue affecting some EU customers' Salesforce and Hubspot syncs. Our team is working on a fix.
- monitoring Jun 05, 2026, 12:44 AM UTC
We have rolled out a fix and we're monitoring closely.
- resolved Jun 05, 2026, 01:15 AM UTC
We confirm the incident is resolved. Thank you for your patience!
Minor June 4, 2026 Customer.io UI is currently inaccessible 7m Management Interface
Started Jun 04, 2026, 01:34 PM UTC· resolved Jun 04, 2026, 01:42 PM UTC
- investigating Jun 04, 2026, 01:34 PM UTC
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.
- monitoring Jun 04, 2026, 01:39 PM UTC
We've got a fix in place, and the UI is available once again. Thank you for your patience!
- resolved Jun 04, 2026, 01:42 PM UTC
This incident has been resolved.
Major June 2, 2026 UI inaccessible 1h 39m Management Interface
Started Jun 02, 2026, 09:18 PM UTC· resolved Jun 02, 2026, 10:57 PM UTC
- investigating Jun 02, 2026, 09:18 PM UTC
Our team is aware of an issue affecting access to the Customer.io UI. Our team is working to identify the cause.
- monitoring Jun 02, 2026, 09:33 PM UTC
A fix has been deployed for the issue affecting access to the UI. We are monitoring performance and customer feedback.
- identified Jun 02, 2026, 10:25 PM UTC
Our team has identified additional UI-related issues affecting some customers. We are working on a fix now.
- monitoring Jun 02, 2026, 10:43 PM UTC
We have rolled out a fix for the remaining UI-related issues and are watching system behavior closely.
- resolved Jun 02, 2026, 10:57 PM UTC
The issues affecting the UI have been resolved, and the system is functioning normally.
Minor June 1, 2026 Reverse ETL Syncs not being run for some EU Customers 30m Data Processing
Started Jun 01, 2026, 11:40 AM UTC· resolved Jun 01, 2026, 12:11 PM UTC
- investigating Jun 01, 2026, 11:40 AM UTC
We are currently investigating an issue affecting Reverse ETL syncs for some EU customers.
- monitoring Jun 01, 2026, 11:44 AM UTC
A fix has been deployed for the issue affecting Reverse ETL syncs in EU workspaces. We are continuing to monitor this.
- resolved Jun 01, 2026, 12:11 PM UTC
We have confirmed that the incident has been resolved and all Reverse ETL syncs are running as expected. Thanks for your patience!
Minor May 29, 2026 Some customers are seeing broadcast delivery delays (emails, push notifications, and webhooks) 41m Message Sending
Started May 29, 2026, 04:26 PM UTC· resolved May 29, 2026, 05:08 PM UTC
- investigating May 29, 2026, 04:26 PM UTC
Our engineers are aware of an issue where messages may be showing as "queued". We're investigating this now. Thank you for your patience!
- identified May 29, 2026, 04:40 PM UTC
We've identified the issue and are working towards a resolution now.
- monitoring May 29, 2026, 04:51 PM UTC
We have a resolution in place and are monitoring message throughput recovery now. Thank you for your patience!
- resolved May 29, 2026, 05:08 PM UTC
We have confirmed that this incident is now resolved. Thank you very much for your patience!
Minor May 25, 2026 Customers in the EU region may experience delays in message sending 42m Message Sending
Started May 25, 2026, 03:27 PM UTC· resolved May 25, 2026, 04:10 PM UTC
- investigating May 25, 2026, 03:27 PM UTC
We are currently investigating this issue.
- monitoring May 25, 2026, 03:58 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved May 25, 2026, 04:10 PM UTC
This incident has been resolved.
Minor May 6, 2026 Some customers in our EU region may experience errors and delays 25m Data Collection, Data Processing, Message Sending, Management Interface
Started May 06, 2026, 04:00 PM UTC· resolved May 06, 2026, 04:26 PM UTC
- identified May 06, 2026, 04:00 PM UTC
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!
- monitoring May 06, 2026, 04:14 PM UTC
The UI is available as expected, and we are monitoring before marking this as fully resolved. Thank you again for your patience!
- resolved May 06, 2026, 04:26 PM UTC
This incident has been resolved.