Marketing Automation & CDPs · reliability comparison
Klaviyo vs RudderStack: which is more reliable? (2026)
RudderStack is more reliable than Klaviyo, scoring 93.0 vs 62.2 out of 100. Over the last 90 days Klaviyo reported 13 incidents and RudderStack reported 3, with effective uptime of 99.26% and 99.94% respectively. RudderStack resolves incidents faster on average (57m).
Data updated Nov 1, 2026 · How we score
| Metric | Klaviyo | RudderStack |
|---|---|---|
| Reliability score | 62.2 | 93.0 |
| Rank (marketing automation platforms) | #11 | #4 |
| Uptime (90 days) | 99.26% | 99.94% |
| Incidents (90 days) | 13 | 3 |
| Partial / major outages | 5 | 1 |
| Avg time to resolve | 3h 39m | 57m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Klaviyo and RudderStack differ
- Klaviyo reported 4.3× as many incidents as RudderStack over the last 90 days (13 vs 3).
- Klaviyo had 5 partial or major outages, compared with 1 for RudderStack.
- RudderStack fixes problems faster: 57m on average, against 3h 39m for Klaviyo (3.9× quicker).
- Klaviyo's longest outage on record lasted 2d 1h (May 5, 2026); RudderStack's lasted 1h 36m (Jun 30, 2026).
90-day uptime
Klaviyo
RudderStack
- 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 RudderStack incidents
- Major outageSep 29, 2026 · resolved in 1h 1m
Data Ingestion Issue in the EU regionofficial update ↗
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
- Customer.io · #2 · 99.99% uptime
- Iterable · #3 · 99.96% uptime
- Hightouch · #5 · 99.92% uptime
See the full most reliable marketing automation & customer data platforms ranking →