Marketing Automation & CDPs · reliability comparison
Klaviyo vs Optimove: which is more reliable? (2026)
Optimove is more reliable than Klaviyo, scoring 80.0 vs 62.2 out of 100. Over the last 90 days Klaviyo reported 13 incidents and Optimove reported 1, with effective uptime of 99.26% and 99.88% respectively. Klaviyo resolves incidents faster on average (3h 39m).
Data updated Nov 1, 2026 · How we score
| Metric | Klaviyo | Optimove |
|---|---|---|
| Reliability score | 62.2 | 80.0 |
| Rank (marketing automation platforms) | #11 | #6 |
| Uptime (90 days) | 99.26% | 99.88% |
| Incidents (90 days) | 13 | 1 |
| Partial / major outages | 5 | 0 |
| Avg time to resolve | 3h 39m | 15h 59m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Klaviyo and Optimove differ
- Klaviyo reported 13× as many incidents as Optimove over the last 90 days (13 vs 1).
- Klaviyo had 5 partial or major outages, compared with 0 for Optimove.
- Klaviyo fixes problems faster: 3h 39m on average, against 15h 59m for Optimove (4.4× quicker).
- Klaviyo's longest outage on record lasted 2d 1h (May 5, 2026); Optimove's lasted 11h 21m (Jan 23, 2026).
90-day uptime
Klaviyo
Optimove
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Klaviyo incidents
- Partial outageOct 29, 2026 · resolved in 2h 10m
Campaign Sending Delaysofficial update ↗
Affected: Email Sending, Text Message Sending, WhatsApp Sending, Mobile Push Sending
- InformationalOct 28, 2026 · resolved in 23h 43m
Affected: Email Sending, Text Message Sending, WhatsApp Sending, Mobile Push Sending, Processing
- Partial outageOct 22, 2026 · resolved in 14h 47m
Outbound Webhook Delaysofficial update ↗
Affected: Analytics
- Partial outageOct 17, 2026 · resolved in 4h 49m
Flow Sending Delaysofficial update ↗
Affected: Email Sending, Text Message Sending, WhatsApp Sending, Mobile Push Sending, Flow Editor, Processing
- Degraded performanceOct 9, 2026 · resolved in 2h 6m
Analytics Events Processing Delays
Affected: Segments, Profiles, Analytics
- Major outageOct 8, 2026 · resolved in 1h 13m
Login and page loading issuesofficial update ↗
Affected: Klaviyo App
Recent Optimove incidents
- Degraded performanceAug 7, 2026 · resolved in 15h 59m
Optimail | Campaign Execution Issue
Affected: Optimail
Other marketing automation platforms to consider
- HubSpot Marketing Hub · #1 · 100% uptime
- Customer.io · #2 · 99.99% uptime
- Iterable · #3 · 99.96% uptime
- RudderStack · #4 · 99.94% uptime
See the full most reliable marketing automation & customer data platforms ranking →