Transactional Email APIs · reliability comparison
Twilio SendGrid vs SMTP2GO: which is more reliable? (2026)
Twilio SendGrid is more reliable than SMTP2GO, scoring 94.8 vs 58.4 out of 100. Over the last 90 days Twilio SendGrid reported 5 incidents and SMTP2GO reported 17, with effective uptime of 99.98% and 99.17% respectively. Twilio SendGrid resolves incidents faster on average (1h 9m).
Data updated Nov 1, 2026 · How we score
| Metric | Twilio SendGrid | SMTP2GO |
|---|---|---|
| Reliability score | 94.8 | 58.4 |
| Rank (transactional email APIs) | #4 | #11 |
| Uptime (90 days) | 99.98% | 99.17% |
| Incidents (90 days) | 5 | 17 |
| Partial / major outages | 0 | 3 |
| Avg time to resolve | 1h 9m | 5h 39m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Twilio SendGrid and SMTP2GO differ
- SMTP2GO reported 3.4× as many incidents as Twilio SendGrid over the last 90 days (17 vs 5).
- SMTP2GO had 3 partial or major outages, compared with 0 for Twilio SendGrid.
- Twilio SendGrid fixes problems faster: 1h 9m on average, against 5h 39m for SMTP2GO (4.9× quicker).
- Twilio SendGrid's longest incident on record lasted 2h 2m (Jul 8, 2026); SMTP2GO's lasted 1d 4h (Jan 22, 2026).
90-day uptime
Twilio SendGrid
SMTP2GO
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
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
Recent SMTP2GO incidents
- Degraded performanceOct 30, 2026 · resolved in 10h 12m
Affected: API Servers
- Partial outageOct 15, 2026 · resolved in 2h 20m
Softbounce Errorsofficial update ↗
Affected: Email sending (SMTP service)
- InformationalOct 8, 2026 · resolved in 1h 26m
Issues with API- statusCode=500
Affected: API Servers
- Degraded performanceOct 1, 2026 · resolved in 8h 26m
Affected: Email sending (SMTP service)
- InformationalOct 1, 2026 · resolved in 33m
Connection issues and 'processed' emails
Affected: Email sending (SMTP service)
- InformationalSep 30, 2026 · resolved in 8m
Issues connecting to mail.smtp2go.com
Affected: Email sending (SMTP service)
Other transactional email APIs to consider
- Mailjet · #1 · 100% uptime
- Mailtrap Email Sending · #2 · 99.99% uptime
- Loops · #3 · 99.98% uptime
- SparkPost (Bird) · #5 · 99.90% uptime
See the full most reliable transactional email apis ranking →