Transactional Email APIs · reliability comparison
Mailgun vs Mailjet: which is more reliable? (2026)
Mailjet is more reliable than Mailgun, scoring 99.6 vs 83.2 out of 100. Over the last 90 days Mailgun reported 10 incidents and Mailjet reported 1, with effective uptime of 99.84% and 100% respectively.
Data updated Nov 1, 2026 · How we score
| Metric | Mailgun | Mailjet |
|---|---|---|
| Reliability score | 83.2 | 99.6 |
| Rank (transactional email APIs) | #7 | #1 |
| Uptime (90 days) | 99.84% | 100% |
| Incidents (90 days) | 10 | 1 |
| Partial / major outages | 3 | 0 |
| Avg time to resolve | 1h 43m | — |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Mailgun and Mailjet differ
- Mailgun reported 10× as many incidents as Mailjet over the last 90 days (10 vs 1).
- Mailgun had 3 partial or major outages, compared with 0 for Mailjet.
- Mailgun's longest outage on record lasted 3h 37m (May 25, 2026); Mailjet's lasted 32m (Jun 5, 2026).
90-day uptime
Mailgun
Mailjet
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
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
Recent Mailjet incidents
- InformationalSep 4, 2026 · resolved in 32m
Other transactional email APIs to consider
- Mailtrap Email Sending · #2 · 99.99% uptime
- Loops · #3 · 99.98% uptime
- Twilio SendGrid · #4 · 99.98% uptime
- Mailchimp Transactional (Mandrill) · #5 · 99.93% uptime
See the full most reliable transactional email apis ranking →