Customer.io is up
OperationalNo known problems: Customer.io's status page says operational
Reports count in aggregate against normal levels; one alone never makes a claim.
Open incidents
What Customer.io has posted and not resolved.
Customer.io has no open incidents.
Daily history
Worst impact each day, from the provider's own incidents.
- Management InterfaceOperational
- Message SendingOperational
- Javascript TrackerOperational
- Third-Party Services · Drag and drop email composerOperational
- Data CollectionOperational
- Third-Party Services · Email Composer Image UploadsOperational
- Data ProcessingOperational
- Knowledge BaseOperational
Last 90 days in numbers
From the provider's own posts, including history read from its archive.
- Uptime
- 99.99%12 months
- Incidents
- 5on 3 days
- Median duration
- 27m
- Longest
- 1h 19m
- Postmortem rate
- n/apartial and major outages
People reporting problems
Hourly counts, last 24 hours.
No reports in the last 24 hours.
Follow Customer.io incidents
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https://down.guide/feed?provider=customerio
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https://down.guide/feed?provider=customerio&format=atom
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https://down.guide/feed?provider=customerio&format=json
The same entries as JSON Feed 1.1, each with the full incident under _down_guide, for scripts.
https://down.guide/api/v1/incidents?provider=customerio
Pages of 30 incidents, newest first. Pass the response's next_cursor as cursor for the next page.
Recent incidents
The last 90 days.
- Customer.ioPartial outageCustomers are Unable to add new Email Sending Domains
Customer.io says customers were unable to add new email sending domains. The provider identified the issue, and the incident is now resolved as of 2026-11-07 00:24 UTC.
- Customer.ioDegradedCustomer.io UI is currently unavailable for some customers
- Customer.ioDegradedSome US customers may experience delays in message sending
- Customer.ioOperationalReduced Deliverability to Microsoft-Hosted Email Addresses
- Customer.ioDegradedInvestigating issues with the Agent
Customer.io status: questions
Is Customer.io down right now?
No known problems: Customer.io's status page says operational (checked 2026-11-11 01:20 UTC from Customer.io's official status page).
What is Customer.io's uptime?
99.99% over the last 90 days and 99.99% over 12 months, from the incidents Customer.io posted on its own status page. A major outage counts in full and a partial outage as 30% of its time, per component.
When was Customer.io's last outage?
Customers are Unable to add new Email Sending Domains, starting 2026-11-06 23:53 UTC and lasting 31m: https://down.guide/DWN-95c4206922
How do I get alerts when Customer.io goes down?
Subscribe to https://down.guide/feed?provider=customerio (RSS; add format=atom or format=json). In Slack, install the RSS app and run /feed subscribe with that URL; in Discord, give it to a feed bot such as MonitoRSS. No account needed.
Where does down.guide get Customer.io's status?
From Customer.io's official status page, https://status.customerio.com, read every minute. Customer.io's words are quoted verbatim and linked.