Transactional Email APIs · reliability comparison
Mailjet vs Resend: which is more reliable? (2026)
Mailjet is more reliable than Resend, scoring 99.6 vs 60.5 out of 100. Over the last 90 days Mailjet reported 1 incident and Resend reported 23, with effective uptime of 100% and 99.39% respectively.
Data updated Nov 1, 2026 · How we score
| Metric | Mailjet | Resend |
|---|---|---|
| Reliability score | 99.6 | 60.5 |
| Rank (transactional email APIs) | #1 | #10 |
| Uptime (90 days) | 100% | 99.39% |
| Incidents (90 days) | 1 | 23 |
| Partial / major outages | 0 | 4 |
| Avg time to resolve | — | 3h 39m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Mailjet and Resend differ
- Resend reported 23× as many incidents as Mailjet over the last 90 days (23 vs 1).
- Resend had 4 partial or major outages, compared with 0 for Mailjet.
- Mailjet's longest outage on record lasted 32m (Jun 5, 2026); Resend's lasted 2h 39m (Aug 8, 2026).
90-day uptime
Mailjet
Resend
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Mailjet incidents
- InformationalSep 4, 2026 · resolved in 32m
Recent Resend incidents
- Degraded performanceOct 26, 2026 · resolved in 23m
Affected: Email Events
- Degraded performanceOct 23, 2026 · resolved in 49m
Intermittent latency spikes on our emails API
Affected: Batch Emails, Scheduled Emails, Single Email, Broadcast Emails
- Degraded performanceOct 10, 2026 · resolved in 1h 9m
Delayed new team provisioning and contact webhook delivery
Affected: Dashboard, General API, Webhooks
- Degraded performanceOct 9, 2026 · resolved in 23m
Delayed new team provisioning and contact webhook delivery
Affected: Dashboard, General API, Webhooks
- Degraded performanceOct 1, 2026 · resolved in 52m
- Degraded performanceSep 26, 2026 · resolved in 2h 46m
Other transactional email APIs to consider
- Mailtrap Email Sending · #2 · 99.99% uptime
- Loops · #3 · 99.98% uptime
- Twilio SendGrid · #4 · 99.98% uptime
- SparkPost (Bird) · #5 · 99.90% uptime
See the full most reliable transactional email apis ranking →