Marketing Automation & CDPs · reliability comparison
Customer.io vs RudderStack: which is more reliable? (2026)
Customer.io is more reliable than RudderStack, scoring 96.2 vs 93.0 out of 100. Over the last 90 days Customer.io reported 5 incidents and RudderStack reported 3, with effective uptime of 99.99% and 99.94% respectively. Customer.io resolves incidents faster on average (19m).
Data updated Nov 1, 2026 · How we score
| Metric | Customer.io | RudderStack |
|---|---|---|
| Reliability score | 96.2 | 93.0 |
| Rank (marketing automation platforms) | #2 | #4 |
| Uptime (90 days) | 99.99% | 99.94% |
| Incidents (90 days) | 5 | 3 |
| Partial / major outages | 0 | 1 |
| Avg time to resolve | 19m | 57m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Customer.io and RudderStack differ
- Customer.io reported 67% more incidents than RudderStack over the last 90 days (5 vs 3).
- RudderStack had 1 partial or major outage, compared with 0 for Customer.io.
- Customer.io fixes problems faster: 19m on average, against 57m for RudderStack (3.0× quicker).
- Customer.io's longest outage on record lasted 2h 42m (Jun 13, 2026); RudderStack's lasted 1h 36m (Jun 30, 2026).
90-day uptime
Customer.io
RudderStack
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Customer.io incidents
- 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
Recent RudderStack incidents
- Major outageSep 29, 2026 · resolved in 1h 1m
Data Ingestion Issue in the EU region
Affected: Data Ingestion (EU)
- Degraded performanceSep 21, 2026 · resolved in 35m
Increased latency in US data processing pipeline
Affected: Data Processing Pipeline (US)
- Degraded performanceAug 17, 2026 · resolved in 1h 14m
Other marketing automation platforms to consider
- HubSpot Marketing Hub · #1 · 100% uptime
- Iterable · #3 · 99.96% uptime
- Hightouch · #5 · 99.92% uptime
- Optimove · #6 · 99.88% uptime
See the full most reliable marketing automation & customer data platforms ranking →