Transactional Email APIs · reliability comparison
Elastic Email vs Postmark: which is more reliable? (2026)
Elastic Email is more reliable than Postmark, scoring 82.4 vs 68.3 out of 100. Over the last 90 days Elastic Email reported 3 incidents and Postmark reported 8, with effective uptime of 99.84% and 99.58% respectively. Elastic Email resolves incidents faster on average (6h 19m).
Data updated Nov 1, 2026 · How we score
| Metric | Elastic Email | Postmark |
|---|---|---|
| Reliability score | 82.4 | 68.3 |
| Rank (transactional email APIs) | #7 | #9 |
| Uptime (90 days) | 99.84% | 99.58% |
| Incidents (90 days) | 3 | 8 |
| Partial / major outages | 1 | 0 |
| Avg time to resolve | 6h 19m | 7h 41m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Elastic Email and Postmark differ
- Postmark reported 2.7× as many incidents as Elastic Email over the last 90 days (8 vs 3).
- Elastic Email had 1 partial or major outage, compared with 0 for Postmark.
- Elastic Email fixes problems faster: 6h 19m on average, against 7h 41m for Postmark.
- Elastic Email's longest outage on record lasted 1h 43m (Sep 1, 2026); Postmark's lasted 1d 3h (Feb 1, 2026).
90-day uptime
Elastic Email
Postmark
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Elastic Email incidents
- Degraded performanceOct 6, 2026 · resolved in 1h 54m
- Degraded performanceSep 22, 2026 · resolved in 15h 21m
- Partial outageSep 1, 2026 · resolved in 1h 43m
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 →