Transactional Email APIs · reliability comparison
Brevo vs Postmark: which is more reliable? (2026)
Brevo is more reliable than Postmark, scoring 70.5 vs 68.3 out of 100. Over the last 90 days Brevo reported 29 incidents and Postmark reported 8, with effective uptime of 99.68% and 99.58% respectively. Brevo resolves incidents faster on average (1h 24m).
Data updated Nov 1, 2026 · How we score
| Metric | Brevo | Postmark |
|---|---|---|
| Reliability score | 70.5 | 68.3 |
| Rank (transactional email APIs) | #8 | #9 |
| Uptime (90 days) | 99.68% | 99.58% |
| Incidents (90 days) | 29 | 8 |
| Partial / major outages | 5 | 0 |
| Avg time to resolve | 1h 24m | 7h 41m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Brevo and Postmark differ
- Brevo reported 3.6× as many incidents as Postmark over the last 90 days (29 vs 8).
- Brevo had 5 partial or major outages, compared with 0 for Postmark.
- Brevo fixes problems faster: 1h 24m on average, against 7h 41m for Postmark (5.5× quicker).
- Brevo's longest outage on record lasted 2h 2m (Oct 1, 2026); Postmark's lasted 1d 3h (Feb 1, 2026).
90-day uptime
Brevo
Postmark
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Brevo incidents
- Degraded performanceOct 27, 2026 · resolved in 4h 21m
Affected: Marketing email tracking links, Transactional emails delivery, Outbound Webhooks, Workflows, Contacts, WhatsApp Campaigns +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: Transactional emails delivery, Brevo Tracker, Workflows, Transactional emails tracking links
- Degraded performanceOct 15, 2026 · resolved in 12m
Delay in Processing Loyalty API request
Affected: Loyalty API
Recent Postmark incidents
- Degraded performanceOct 27, 2026 · resolved in 1h 43m
- MaintenanceOct 7, 2026 · resolved in 3h
- Degraded performanceSep 28, 2026 · resolved in 2h 6m
- Degraded performanceSep 28, 2026 · resolved in 3h 59m
- Degraded performanceSep 22, 2026 · resolved in 20m
- Degraded performanceSep 17, 2026 · resolved in 1h 33m
Other transactional email APIs to consider
- Mailjet · #1 · 100% uptime
- Mailtrap Email Sending · #2 · 99.99% uptime
- Loops · #3 · 99.98% uptime
- Twilio SendGrid · #4 · 99.98% uptime
See the full most reliable transactional email apis ranking →