Live status & reliability report
Customer.io status, outages & reliability
Customer.io is a messaging automation platform for sending behaviour-triggered email, push, SMS and in-app messages.
Data updated Nov 1, 2026 · score recalculated
Over the last 90 days Customer.io had 99.99% effective uptime across 5 status page incidents, resolving them in 19m on average.
Is Customer.io down right now?
No, Customer.io is up and running.
- Customer.io's status page reports all systems operational. Checked .
- All 4 Customer.io pages we check are responding. Checked .
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90-day uptime
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Key facts about Customer.io's reliability
- Since Nov 18, 2025, the earliest date its published history covers, Customer.io published 50 incidents on its status page, 6 of them partial or major outages.
- Its longest outage on record in that time was “Investigating Connectivity Issues” on Jun 13, 2026, which lasted 2h 42m.
- The part of Customer.io most often affected was Management Interface (21 of 50 incidents).
- Customer.io reported 5 incidents in the last 90 days, down from 21 in the 90 days before.
- Incidents most often began on a Monday (13 of 50, UTC).
- Customer.io's 90-day uptime of 99.99% is above the average for marketing automation platforms (99.51%).
- It resolves incidents faster than the typical marketing automation platform: 19m on average, against a median of 3h 5m.
Score breakdown
Incidents per month
- Major outage
- Partial outage
- Degraded
- Informational
Response time
Daily average response time of Customer.io's public pages, measured by our probes.
Not enough data yet — this chart fills in as our monitoring runs.
Score trend
Daily reliability score (rolling 90-day window).
Not enough data yet — this chart fills in as our monitoring runs.
Customer.io incident history (last 90 days)
- Degraded performanceOct 27, 2026 · resolved in 25m
Customer.io UI is currently unavailable for some customers
Affected: Management Interface
- Degraded performanceSep 19, 2026 · resolved in 27m
Some US customers may experience delays in message sending
Affected: Message Sending
- InformationalSep 4, 2026 · resolved in 1h 19m
Reduced Deliverability to Microsoft-Hosted Email Addresses
Affected: Message Sending
- Degraded performanceSep 3, 2026 · resolved in 5m
- InformationalAug 5, 2026 · resolved in 26m
Customer.io UI is inaccessible
Affected: Management Interface
Source: Customer.io status page · last checked · Subscribe via RSS
Our independent monitoring
We check these public Customer.io pages every 5 minutes. An outage is recorded after two consecutive failed checks.
| Page | Last check | Uptime (30d) | Avg response |
|---|---|---|---|
| App login | Up | 100% | 432 ms |
| Homepage | Up | 100% | 563 ms |
| Tracking API host | Up | 100% | 186 ms |
| Homepage | Up | 100% | 600 ms |
How Customer.io compares
Customer.io status FAQ
Is Customer.io down right now?
No, Customer.io is up and running. Customer.io's status page currently reports all systems operational, and all 4 of the Customer.io pages we check every five minutes are responding. This page updates automatically when that changes.
How reliable is Customer.io?
Customer.io has a reliability score of 96.2 out of 100, ranking #2 of 14 marketing automation platforms. Over the last 90 days it had 99.99% effective uptime.
How often does Customer.io have outages?
Customer.io published 5 incidents on its status page in the last 90 days (0 partial or major outages) and 50 in the past 12 months.
How long do Customer.io outages last?
Customer.io resolves incidents in 19m on average. Its longest outage in the past year lasted 2h 42m, on Jun 13, 2026.
Does Customer.io have a status page?
Yes. Customer.io's official status page is status.customerio.com. We read it every five minutes and keep its full incident history.