Customer.io Outage History

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Customer.io had 51 outages in the last 2 years totaling 43h 45m of downtime — averaging 2.1 incidents per month.

There were 51 Customer.io outages since August 18, 2025 totaling 43h 45m of downtime. Each is summarised below — incident details, duration, and resolution information.

Source: https://status.customerio.com

Minor December 12, 2025

Some customers are experiencing issues with saving their content

Detected by Pingoru
Dec 12, 2025, 05:07 PM UTC
Resolved
Dec 12, 2025, 05:25 PM UTC
Duration
18m
Affected: Management Interface
Timeline · 3 updates
  1. investigating Dec 12, 2025, 05:07 PM UTC

    Our engineers are looking into this issue now. We sincerely apologize for the inconvenience.

  2. identified Dec 12, 2025, 05:20 PM UTC

    The issue has been identified and we're working towards a resolution now. Thank you for your patience!

  3. resolved Dec 12, 2025, 05:25 PM UTC

    This incident has been resolved.

Read the full incident report →

Minor December 9, 2025

Intermittent issues loading the in-app message editor.

Detected by Pingoru
Dec 09, 2025, 02:20 PM UTC
Resolved
Dec 09, 2025, 03:01 PM UTC
Duration
40m
Affected: Management Interface
Timeline · 3 updates
  1. investigating Dec 09, 2025, 02:20 PM UTC

    We are currently investigating an issue preventing the in-app message editor from loading in some accounts.

  2. investigating Dec 09, 2025, 02:21 PM UTC

    We are continuing to investigate this issue.

  3. resolved Dec 09, 2025, 03:01 PM UTC

    The team has identified the issue and released a fix.

Read the full incident report →

Minor November 24, 2025

Trouble loading User Interface in some workspace

Detected by Pingoru
Nov 24, 2025, 05:20 PM UTC
Resolved
Nov 24, 2025, 06:15 PM UTC
Duration
54m
Affected: Management Interface
Timeline · 3 updates
  1. investigating Nov 24, 2025, 05:20 PM UTC

    We are currently investigating reports loading the User Interface (UI) in some workspaces.

  2. identified Nov 24, 2025, 05:45 PM UTC

    The issue has been identified and a fix is being implemented.

  3. resolved Nov 24, 2025, 06:15 PM UTC

    The team has released a fix and this incident is now resolved.

Read the full incident report →

Minor November 21, 2025

Forms submissions experiencing intermittent delays

Detected by Pingoru
Nov 21, 2025, 11:46 AM UTC
Resolved
Nov 21, 2025, 01:09 PM UTC
Duration
1h 22m
Affected: Data Processing
Timeline · 4 updates
  1. investigating Nov 21, 2025, 11:46 AM UTC

    We are investigating reports of some Form submissions being delayed in the US and EU Data centers. Forms continue to function as expected.

  2. investigating Nov 21, 2025, 12:37 PM UTC

    We are continuing to investigate the issue.

  3. monitoring Nov 21, 2025, 12:55 PM UTC

    The issue has been identified and our team is currently monitoring the service.

  4. resolved Nov 21, 2025, 01:09 PM UTC

    The issue has now been resolved.

Read the full incident report →

Minor November 18, 2025

Legacy in-app editing, delays receiving in-app messages and Journeys domain verification with Cloudflare

Detected by Pingoru
Nov 18, 2025, 12:28 PM UTC
Resolved
Nov 18, 2025, 02:51 PM UTC
Duration
2h 22m
Affected: Management Interface
Timeline · 7 updates
  1. identified Nov 18, 2025, 12:28 PM UTC

    Customers using the legacy in-app message editor may encounter issues when trying to edit messages. Sending and viewing of existing messages are not affected. The team has identified the root cause and is actively working to restore the functionality.

  2. identified Nov 18, 2025, 12:46 PM UTC

    During the investigation, it was discovered that some customers are experiencing delays in receiving in-app messages.

  3. identified Nov 18, 2025, 01:18 PM UTC

    The team is continuing to work towards a resolution.

  4. identified Nov 18, 2025, 01:46 PM UTC

    Customers may experience issues when verifying new domains associated to Cloudflare. The team is continuing to work towards a resoltuion.

  5. identified Nov 18, 2025, 02:16 PM UTC

    We are continuing to work on a fix for this issue.

  6. monitoring Nov 18, 2025, 02:43 PM UTC

    A fix has been implemented and we are monitoring the results.

  7. resolved Nov 18, 2025, 02:51 PM UTC

    This incident has been resolved.

Read the full incident report →

Minor November 5, 2025

Code Editor is freezing unexpectedly

Detected by Pingoru
Nov 05, 2025, 10:09 AM UTC
Resolved
Nov 05, 2025, 10:29 AM UTC
Duration
20m
Affected: Management Interface
Timeline · 3 updates
  1. investigating Nov 05, 2025, 10:09 AM UTC

    We have received reports of Code Editor emails crashing. Our team is currently investigating

  2. monitoring Nov 05, 2025, 10:25 AM UTC

    Our team has rolled out a fix, and the Code Editor is operational.

  3. resolved Nov 05, 2025, 10:29 AM UTC

    The issue has now been resolved.

Read the full incident report →

Minor October 31, 2025

Issue preventing some workspaces from loading in the US

Detected by Pingoru
Oct 31, 2025, 05:48 PM UTC
Resolved
Oct 31, 2025, 06:12 PM UTC
Duration
23m
Affected: Management Interface
Timeline · 4 updates
  1. investigating Oct 31, 2025, 05:48 PM UTC

    We are currently investigating an issue impacting loading of the user interface for some workspaces in the US

  2. identified Oct 31, 2025, 06:01 PM UTC

    The issue has been identified and we are working on a fix

  3. monitoring Oct 31, 2025, 06:06 PM UTC

    A fix has been implementing and we are monitoring the results.

  4. resolved Oct 31, 2025, 06:12 PM UTC

    This incident has been resolved.

Read the full incident report →

Minor October 29, 2025

Delayed Workspace Performance

Detected by Pingoru
Oct 29, 2025, 08:02 PM UTC
Resolved
Oct 29, 2025, 08:12 PM UTC
Duration
9m
Affected: Data ProcessingMessage SendingManagement Interface
Timeline · 3 updates
  1. investigating Oct 29, 2025, 08:02 PM UTC

    We are currently investigating an issue where some customer may see delays in data processing and message sending in the US.

  2. monitoring Oct 29, 2025, 08:02 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved Oct 29, 2025, 08:12 PM UTC

    This incident has been resolved.

Read the full incident report →

Minor October 29, 2025

Integrations pages are currently not loading

Detected by Pingoru
Oct 29, 2025, 06:04 PM UTC
Resolved
Oct 29, 2025, 06:17 PM UTC
Duration
13m
Affected: Management Interface
Timeline · 3 updates
  1. investigating Oct 29, 2025, 06:04 PM UTC

    We are currently investigating an issue impacting the loading of integrations pages in the Customer.io interface.

  2. investigating Oct 29, 2025, 06:04 PM UTC

    We are continuing to investigate this issue.

  3. resolved Oct 29, 2025, 06:17 PM UTC

    The team has implemented a fix and this incident has now been resolved.

Read the full incident report →

Minor October 29, 2025

Intermittent loading issues in the Customer.io UI

Detected by Pingoru
Oct 29, 2025, 03:04 PM UTC
Resolved
Oct 29, 2025, 03:52 PM UTC
Duration
48m
Affected: Management Interface
Timeline · 5 updates
  1. investigating Oct 29, 2025, 03:04 PM UTC

    We are currently investigating reports that the Customer.io UI is slow to load at times.

  2. identified Oct 29, 2025, 03:11 PM UTC

    The issue has been identified and the team is working on a fix.

  3. monitoring Oct 29, 2025, 03:48 PM UTC

    A fix has been implemented and the team will continue to monitor the issue.

  4. monitoring Oct 29, 2025, 03:48 PM UTC

    We are continuing to monitor for any further issues.

  5. resolved Oct 29, 2025, 03:52 PM UTC

    This incident has been resolved.

Read the full incident report →

Minor October 21, 2025

Intermittent issues loading Design Studio for some of our EU customers

Detected by Pingoru
Oct 21, 2025, 07:39 AM UTC
Resolved
Oct 21, 2025, 08:53 AM UTC
Duration
1h 14m
Affected: Management Interface
Timeline · 4 updates
  1. investigating Oct 21, 2025, 07:39 AM UTC

    Our team has received reports of intermittent issues accessing Design Studio. We're currently investigating the issue.

  2. identified Oct 21, 2025, 08:06 AM UTC

    Our team has identified the cause behind the issue, and we're currently working on a fix.

  3. monitoring Oct 21, 2025, 08:48 AM UTC

    Our team has released a fix for the issue. We are monitoring for any new reports.

  4. resolved Oct 21, 2025, 08:53 AM UTC

    This issue has now been resolved.

Read the full incident report →

Notice October 20, 2025

Twilio Templates Outage

Detected by Pingoru
Oct 20, 2025, 06:45 PM UTC
Resolved
Oct 20, 2025, 10:07 PM UTC
Duration
3h 21m
Affected: Message SendingManagement Interface
Timeline · 3 updates
  1. identified Oct 20, 2025, 06:45 PM UTC

    We are experiencing intermittent errors with our upstream provider for Twilio templates. Customers may see errors in our UI while trying to manage Twilio templates, and delivery of Twilio messages may be delayed. No other functionality of our platform is known to be affected.

  2. monitoring Oct 20, 2025, 07:42 PM UTC

    We are no longer seeing intermittent errors from the upstream provider for Twilio templates. We are continuing to monitor message delivery.

  3. resolved Oct 20, 2025, 10:07 PM UTC

    This incident has been resolved.

Read the full incident report →

Minor October 20, 2025

Customer.io Documentation website (https://docs.customer.io) may not be loading for some customers

Detected by Pingoru
Oct 20, 2025, 04:03 PM UTC
Resolved
Oct 21, 2025, 11:37 AM UTC
Duration
19h 33m
Affected: Knowledge Base
Timeline · 2 updates
  1. monitoring Oct 20, 2025, 04:03 PM UTC

    One of our upstream hosting providers is experiencing issues, which may cause intermittent problems for some customers trying to reach our documentation website: https://docs.customer.io. We apologize for the issue and will be monitoring this for when we can confirm the issue is fully resolved.

  2. resolved Oct 21, 2025, 11:37 AM UTC

    This incident has been resolved.

Read the full incident report →

Critical October 8, 2025

Issue with Design Studio

Detected by Pingoru
Oct 08, 2025, 03:46 PM UTC
Resolved
Oct 08, 2025, 04:16 PM UTC
Duration
29m
Affected: Management Interface
Timeline · 4 updates
  1. investigating Oct 08, 2025, 03:46 PM UTC

    We are currently experiencing an issue for all customers where Design Studio is not available. We are actively investigating the issue. Message sending and processing is not affected.

  2. monitoring Oct 08, 2025, 04:12 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. monitoring Oct 08, 2025, 04:16 PM UTC

    We are continuing to monitor for any further issues.

  4. resolved Oct 08, 2025, 04:16 PM UTC

    This incident has been resolved.

Read the full incident report →

Minor September 30, 2025

Some customers in the US are experiencing delays

Detected by Pingoru
Sep 30, 2025, 09:10 PM UTC
Resolved
Sep 30, 2025, 09:20 PM UTC
Duration
9m
Affected: Data ProcessingMessage Sending
Timeline · 3 updates
  1. identified Sep 30, 2025, 09:10 PM UTC

    We have identified an issue that may cause some customers with accounts in the US to experience delays with data processing and message sending, as well as UI errors. We are working on a fix, and services should be back to normal shortly.

  2. monitoring Sep 30, 2025, 09:16 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved Sep 30, 2025, 09:20 PM UTC

    This incident has been resolved.

Read the full incident report →

Minor September 26, 2025

Some customers in our EU region are experiencing delays

Detected by Pingoru
Sep 26, 2025, 04:17 PM UTC
Resolved
Sep 26, 2025, 04:49 PM UTC
Duration
31m
Affected: Data Processing
Timeline · 3 updates
  1. identified Sep 26, 2025, 04:17 PM UTC

    Our engineers identified an issue that may cause some customers with accounts in our EU may to experience delays with data processing and message sending, as well as UI errors.

  2. monitoring Sep 26, 2025, 04:32 PM UTC

    We have a resolution in place now, and backlogs are currently being processed. We'll be back with an update once the issue is all clear.

  3. resolved Sep 26, 2025, 04:49 PM UTC

    This incident has been resolved.

Read the full incident report →

Notice September 13, 2025

Some customers in our US region are experiencing delays

Detected by Pingoru
Sep 13, 2025, 02:01 PM UTC
Resolved
Sep 13, 2025, 02:28 PM UTC
Duration
26m
Timeline · 4 updates
  1. investigating Sep 13, 2025, 02:01 PM UTC

    We are currently investigating this issue.

  2. identified Sep 13, 2025, 02:08 PM UTC

    The issue has been identified and a fix is being implemented.

  3. monitoring Sep 13, 2025, 02:16 PM UTC

    We have a resolution in place now, and the backlogs are currently being processed. We'll be back with an update once the issue is all clear.

  4. resolved Sep 13, 2025, 02:28 PM UTC

    This incident has been resolved.

Read the full incident report →

Minor August 28, 2025

Some customers are experiencing delays with import processing

Detected by Pingoru
Aug 28, 2025, 01:02 PM UTC
Resolved
Aug 28, 2025, 01:56 PM UTC
Duration
54m
Affected: Data Processing
Timeline · 4 updates
  1. investigating Aug 28, 2025, 01:02 PM UTC

    Our engineers have identified that some customers may be experiencing delays with their import processing. This includes both CSV and rETL syncs that import data into workspaces. We're investigating now and will be back with an update soon.

  2. identified Aug 28, 2025, 01:29 PM UTC

    The issue has been identified and we're currently looking into a resolution.

  3. monitoring Aug 28, 2025, 01:47 PM UTC

    A fix has been implemented and we are monitoring the results.

  4. resolved Aug 28, 2025, 01:56 PM UTC

    This incident has been resolved.

Read the full incident report →

Minor August 28, 2025

Some Data Warehouse Sync Exports are unexpectedly failing.

Detected by Pingoru
Aug 28, 2025, 08:41 AM UTC
Resolved
Aug 28, 2025, 09:55 AM UTC
Duration
1h 14m
Timeline · 3 updates
  1. identified Aug 28, 2025, 08:41 AM UTC

    Our team has identified an issue that has temporarily affected exports from our Data Warehouse Sync feature. No data is lost, and all delayed data will be synced as the issue is resolved. We're currently working on a fix.

  2. monitoring Aug 28, 2025, 09:42 AM UTC

    Our team has released a fix for the issue. We are currently monitoring running exports to confirm the fix.

  3. resolved Aug 28, 2025, 09:55 AM UTC

    The issue has been resolved. Data Warehouse Sync exports are back fully operational.

Read the full incident report →

Notice August 24, 2025

US Customers using mobile sdk, javascript calls, and cdp api may experience errors with calls to the api.

Detected by Pingoru
Aug 24, 2025, 03:31 PM UTC
Resolved
Aug 24, 2025, 04:39 PM UTC
Duration
1h 8m
Affected: Data Processing
Timeline · 3 updates
  1. investigating Aug 24, 2025, 03:31 PM UTC

    We are currently investigating this issue.

  2. monitoring Aug 24, 2025, 04:01 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved Aug 24, 2025, 04:39 PM UTC

    This incident has been resolved.

Read the full incident report →

Notice August 19, 2025

User Interface experiencing troubles loading

Detected by Pingoru
Aug 19, 2025, 04:48 AM UTC
Resolved
Aug 19, 2025, 05:19 AM UTC
Duration
31m
Timeline · 3 updates
  1. investigating Aug 19, 2025, 04:48 AM UTC

    We are aware of UI not loading for some customers. We are actively looking into this incident.

  2. monitoring Aug 19, 2025, 05:06 AM UTC

    We have identified the issue and implemented a fix. The systems are back online and we are monitoring availability and performance.

  3. resolved Aug 19, 2025, 05:19 AM UTC

    The incident is resolved. UI is loading correctly. Data processing as well as sending and receiving of messages was not affected during this incident.

Read the full incident report →

Minor August 18, 2025

Customer.io UI and API issues

Detected by Pingoru
Aug 18, 2025, 10:06 PM UTC
Resolved
Aug 18, 2025, 10:27 PM UTC
Duration
20m
Affected: Data ProcessingManagement Interface
Timeline · 2 updates
  1. monitoring Aug 18, 2025, 10:06 PM UTC

    The Customer.io UI was failing to load, and API requests were failing for certain customers. Engineers have implemented a fix and are monitoring the situation.

  2. resolved Aug 18, 2025, 10:27 PM UTC

    The issue has been resolved.

Read the full incident report →