Marketing Automation & CDPs · reliability comparison
Customer.io vs Twilio Segment: which is more reliable? (2026)
Customer.io is more reliable than Twilio Segment, scoring 96.2 vs 60.5 out of 100. Over the last 90 days Customer.io reported 5 incidents and Twilio Segment reported 10, with effective uptime of 99.99% and 99.35% respectively. Customer.io resolves incidents faster on average (19m).
Data updated Nov 1, 2026 · How we score
| Metric | Customer.io | Twilio Segment |
|---|---|---|
| Reliability score | 96.2 | 60.5 |
| Rank (marketing automation platforms) | #2 | #12 |
| Uptime (90 days) | 99.99% | 99.35% |
| Incidents (90 days) | 5 | 10 |
| Partial / major outages | 0 | 3 |
| Avg time to resolve | 19m | 8h 15m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Customer.io and Twilio Segment differ
- Twilio Segment reported 2× as many incidents as Customer.io over the last 90 days (10 vs 5).
- Twilio Segment had 3 partial or major outages, compared with 0 for Customer.io.
- Customer.io fixes problems faster: 19m on average, against 8h 15m for Twilio Segment (26.2× quicker).
- Customer.io's longest outage on record lasted 2h 42m (Jun 13, 2026); Twilio Segment's lasted 10h 18m (Dec 16, 2025).
90-day uptime
Customer.io
Twilio Segment
- 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 Twilio Segment incidents
- Degraded performanceOct 26, 2026 · resolved in 16h 20m
Affected: Streaming Destinations (US), Reverse ETL (EU), Streaming Destinations (EU), Reverse ETL (US)
- Degraded performanceOct 2, 2026 · resolved in 1h 16m
Audience & Journey data delivery delay in EU region
Affected: Engage (EU), Linked Audiences (EU), Journeys (EU)
- Degraded performanceOct 1, 2026 · resolved in 8h 33m
Braze Web Event Delivery is experience event delivery issue
Affected: Streaming Destinations (US), Streaming Destinations (EU)
- Degraded performanceSep 16, 2026 · resolved in 2h 10m
Actions S3 is currently experience formatting issues with the delivered events
Affected: Streaming Destinations (US), Engage (US), Streaming Destinations (EU), Engage (EU), Profiles Sync, Journeys (US) +1 more
- Partial outageSep 10, 2026 · resolved in 1h 11m
SSO Login Issues with the Segment App
Affected: Web Interface (US)
- Partial outageSep 3, 2026 · resolved in 4h 11m
Issue with Engage UIofficial update ↗
Affected: Web Interface (US), Engage (US)
Other marketing automation platforms to consider
- HubSpot Marketing Hub · #1 · 100% uptime
- Iterable · #3 · 99.96% uptime
- RudderStack · #4 · 99.94% uptime
- Hightouch · #5 · 99.92% uptime
See the full most reliable marketing automation & customer data platforms ranking →