Transactional Email APIs · reliability comparison
Mailtrap Email Sending vs Resend: which is more reliable? (2026)
Mailtrap Email Sending is more reliable than Resend, scoring 98.2 vs 60.5 out of 100. Over the last 90 days Mailtrap Email Sending reported 2 incidents and Resend reported 23, with effective uptime of 99.99% and 99.39% respectively. Mailtrap Email Sending resolves incidents faster on average (6m).
Data updated Nov 1, 2026 · How we score
| Metric | Mailtrap Email Sending | Resend |
|---|---|---|
| Reliability score | 98.2 | 60.5 |
| Rank (transactional email APIs) | #2 | #10 |
| Uptime (90 days) | 99.99% | 99.39% |
| Incidents (90 days) | 2 | 23 |
| Partial / major outages | 0 | 4 |
| Avg time to resolve | 6m | 3h 39m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Mailtrap Email Sending and Resend differ
- Resend reported 11.5× as many incidents as Mailtrap Email Sending over the last 90 days (23 vs 2).
- Resend had 4 partial or major outages, compared with 0 for Mailtrap Email Sending.
- Mailtrap Email Sending fixes problems faster: 6m on average, against 3h 39m for Resend (37.1× quicker).
- Mailtrap Email Sending's longest incident on record lasted 2h 57m (Nov 18, 2025); Resend's lasted 2h 39m (Aug 8, 2026).
90-day uptime
Mailtrap Email Sending
Resend
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Mailtrap Email Sending incidents
- MaintenanceOct 8, 2026 · resolved in 38m
- Degraded performanceSep 16, 2026 · resolved in 6m
- Degraded performanceSep 16, 2026 · resolved in 6m
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: Single Email, Broadcast Emails, Batch Emails, Scheduled 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: Webhooks, Dashboard, General API
- Degraded performanceOct 1, 2026 · resolved in 52m
- Degraded performanceSep 26, 2026 · resolved in 2h 46m
Other transactional email APIs to consider
- Mailjet · #1 · 100% 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 →