Transactional Email APIs · reliability comparison
Mailjet vs Twilio SendGrid: which is more reliable? (2026)
Mailjet is more reliable than Twilio SendGrid, scoring 99.6 vs 94.8 out of 100. Over the last 90 days Mailjet reported 1 incident and Twilio SendGrid reported 5, with effective uptime of 100% and 99.98% respectively.
Data updated Nov 1, 2026 · How we score
VS
| Metric | Mailjet | Twilio SendGrid |
|---|---|---|
| Reliability score | 99.6 | 94.8 |
| Rank (transactional email APIs) | #1 | #4 |
| Uptime (90 days) | 100% | 99.98% |
| Incidents (90 days) | 1 | 5 |
| Partial / major outages | 0 | 0 |
| Avg time to resolve | — | 1h 9m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Mailjet and Twilio SendGrid differ
- Twilio SendGrid reported 5× as many incidents as Mailjet over the last 90 days (5 vs 1).
- Mailjet's longest outage on record lasted 32m (Jun 5, 2026); Twilio SendGrid's lasted 2h 2m (Jul 8, 2026).
90-day uptime
Mailjet
Twilio SendGrid
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Mailjet incidents
- InformationalSep 4, 2026 · resolved in 32m
Recent Twilio SendGrid incidents
- MaintenanceOct 29, 2026 · resolved in 1h 26m
[Scheduled] Sendgrid Maintenance Impacting Delivery and Account Configuration
- Degraded performanceOct 24, 2026 · resolved in 50m
Azure Marketplace SendGrid Customers Experiencing Account Management Issues
- InformationalOct 15, 2026 · resolved in <1m
- InformationalOct 2, 2026 · resolved in <1m
- MaintenanceSep 4, 2026 · resolved in 7h 16m
Multiple delivery failures when sending emails to Microsoft or MS based recipients
- MaintenanceAug 24, 2026 · resolved in 22d
Other transactional email APIs to consider
- Mailtrap Email Sending · #2 · 99.99% uptime
- Loops · #3 · 99.98% uptime
- SparkPost (Bird) · #5 · 99.90% uptime
- Mailgun · #6 · 99.84% uptime
See the full most reliable transactional email apis ranking →