Email Marketing Platforms · reliability comparison
Brevo vs Klaviyo: which is more reliable? (2026)
Brevo is more reliable than Klaviyo, scoring 70.5 vs 62.2 out of 100. Over the last 90 days Brevo reported 29 incidents and Klaviyo reported 13, with effective uptime of 99.68% and 99.26% respectively. Brevo resolves incidents faster on average (1h 24m).
Data updated Nov 1, 2026 · How we score
| Metric | Brevo | Klaviyo |
|---|---|---|
| Reliability score | 70.5 | 62.2 |
| Rank (email marketing platforms) | #10 | #11 |
| Uptime (90 days) | 99.68% | 99.26% |
| Incidents (90 days) | 29 | 13 |
| Partial / major outages | 5 | 5 |
| Avg time to resolve | 1h 24m | 3h 39m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Brevo and Klaviyo differ
- Brevo reported 2.2× as many incidents as Klaviyo over the last 90 days (29 vs 13).
- Brevo fixes problems faster: 1h 24m on average, against 3h 39m for Klaviyo (2.6× quicker).
- Brevo's longest outage on record lasted 2h 2m (Oct 1, 2026); Klaviyo's lasted 2d 1h (May 5, 2026).
90-day uptime
Brevo
Klaviyo
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Brevo incidents
- Degraded performanceOct 27, 2026 · resolved in 4h 21m
Affected: Contacts, WhatsApp Campaigns, Contact Management API, SMS Campaigns, Marketing email tracking links, Outbound Webhooks +4 more
- Degraded performanceOct 26, 2026 · resolved in 2h 11m
Error with doubleOptinConfirmation API
Affected: Contact Management API
- InformationalOct 22, 2026 · resolved in 1h 55m
- Degraded performanceOct 19, 2026 · resolved in 20m
Affected: Account and Settings API
- Degraded performanceOct 15, 2026 · resolved in 10m
Affected: Brevo Tracker, Workflows, Transactional emails tracking links, Transactional emails delivery
- Degraded performanceOct 15, 2026 · resolved in 12m
Delay in Processing Loyalty API request
Affected: Loyalty API
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
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 →