Email Marketing Platforms · reliability comparison
Klaviyo vs Moosend: which is more reliable? (2026)
Moosend is more reliable than Klaviyo, scoring 91.6 vs 62.2 out of 100. Over the last 90 days Klaviyo reported 13 incidents and Moosend reported 2, with effective uptime of 99.26% and 99.92% respectively. Moosend resolves incidents faster on average (1h 34m).
Data updated Nov 1, 2026 · How we score
| Metric | Klaviyo | Moosend |
|---|---|---|
| Reliability score | 62.2 | 91.6 |
| Rank (email marketing platforms) | #11 | #6 |
| Uptime (90 days) | 99.26% | 99.92% |
| Incidents (90 days) | 13 | 2 |
| Partial / major outages | 5 | 2 |
| Avg time to resolve | 3h 39m | 1h 34m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Klaviyo and Moosend differ
- Klaviyo reported 6.5× as many incidents as Moosend over the last 90 days (13 vs 2).
- Klaviyo had 5 partial or major outages, compared with 2 for Moosend.
- Moosend fixes problems faster: 1h 34m on average, against 3h 39m for Klaviyo (2.3× quicker).
- Klaviyo's longest outage on record lasted 2d 1h (May 5, 2026); Moosend's lasted 3h 15m (Jul 22, 2026).
90-day uptime
Klaviyo
Moosend
- 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 Moosend incidents
- Partial outageSep 25, 2026 · resolved in 1h 30m
Affected: SMTP, Platform
- Partial outageAug 25, 2026 · resolved in 1h 38m
Issues affecting API and Integrations
Affected: API & Integrations, Platform
Other email marketing platforms to consider
- Drip · #1 · 100% uptime
- MailerLite · #2 · 100% uptime
- Omnisend · #3 · 100% uptime
- AWeber · #4 · 100% uptime
See the full most reliable email marketing platforms ranking →