Transactional Email APIs · reliability comparison
Brevo vs Mailgun: which is more reliable? (2026)
Mailgun is more reliable than Brevo, scoring 83.2 vs 70.5 out of 100. Over the last 90 days Brevo reported 29 incidents and Mailgun reported 10, with effective uptime of 99.68% and 99.84% respectively. Brevo resolves incidents faster on average (1h 24m).
Data updated Nov 1, 2026 · How we score
| Metric | Brevo | Mailgun |
|---|---|---|
| Reliability score | 70.5 | 83.2 |
| Rank (transactional email APIs) | #8 | #6 |
| Uptime (90 days) | 99.68% | 99.84% |
| Incidents (90 days) | 29 | 10 |
| Partial / major outages | 5 | 3 |
| Avg time to resolve | 1h 24m | 1h 43m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Brevo and Mailgun differ
- Brevo reported 2.9× as many incidents as Mailgun over the last 90 days (29 vs 10).
- Brevo had 5 partial or major outages, compared with 3 for Mailgun.
- Brevo fixes problems faster: 1h 24m on average, against 1h 43m for Mailgun.
- Brevo's longest outage on record lasted 2h 2m (Oct 1, 2026); Mailgun's lasted 3h 37m (May 25, 2026).
90-day uptime
Brevo
Mailgun
- 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: 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 Mailgun incidents
- Degraded performanceOct 28, 2026 · resolved in 1h 4m
Affected: Inbound email processing
- Degraded performanceSep 30, 2026 · resolved in 42m
Affected: Inbound email processing
- Degraded performanceSep 14, 2026 · resolved in 58m
Affected: Inbound email processing
- Major outageSep 4, 2026 · resolved in 17m
Affected: API, SMTP, Outbound Delivery, Inbound email processing, Events & Logs, Stats and Analytics
- InformationalSep 4, 2026 · resolved in 34m
- Degraded performanceAug 31, 2026 · resolved in 7h 14m
Affected: Events & Logs
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 →