Email Marketing Platforms · reliability comparison
Klaviyo vs Omnisend: which is more reliable? (2026)
Omnisend is more reliable than Klaviyo, scoring 100.0 vs 62.2 out of 100. Over the last 90 days Klaviyo reported 13 incidents and Omnisend reported 0, with effective uptime of 99.26% and 100% respectively.
Data updated Nov 1, 2026 · How we score
| Metric | Klaviyo | Omnisend |
|---|---|---|
| Reliability score | 62.2 | 100.0 |
| Rank (email marketing platforms) | #11 | #3 |
| Uptime (90 days) | 99.26% | 100% |
| Incidents (90 days) | 13 | 0 |
| Partial / major outages | 5 | 0 |
| Avg time to resolve | 3h 39m | — |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Klaviyo and Omnisend differ
- Omnisend reported no incidents in the last 90 days, while Klaviyo reported 13.
- Klaviyo had 5 partial or major outages, compared with 0 for Omnisend.
- Klaviyo's longest outage on record lasted 2d 1h (May 5, 2026); Omnisend's lasted 19m (Apr 20, 2026).
90-day uptime
Klaviyo
Omnisend
- 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 Omnisend incidents
No incidents reported by Omnisend in the last 90 days.
Other email marketing platforms to consider
- Drip · #1 · 100% uptime
- MailerLite · #2 · 100% uptime
- AWeber · #4 · 100% uptime
- HubSpot Marketing Hub · #5 · 100% uptime
See the full most reliable email marketing platforms ranking →