Transactional Email APIs · reliability comparison
Brevo vs SMTP2GO: which is more reliable? (2026)
Brevo is more reliable than SMTP2GO, scoring 70.5 vs 58.4 out of 100. Over the last 90 days Brevo reported 29 incidents and SMTP2GO reported 17, with effective uptime of 99.68% and 99.17% respectively. Brevo resolves incidents faster on average (1h 24m).
Data updated Nov 2, 2026 · How we score
| Metric | Brevo | SMTP2GO |
|---|---|---|
| Reliability score | 70.5 | 58.4 |
| Rank (transactional email APIs) | #9 | #12 |
| Uptime (90 days) | 99.68% | 99.17% |
| Incidents (90 days) | 29 | 17 |
| Partial / major outages | 5 | 3 |
| Avg time to resolve | 1h 24m | 5h 39m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Brevo and SMTP2GO differ
- Brevo reported 71% more incidents than SMTP2GO over the last 90 days (29 vs 17).
- Brevo had 5 partial or major outages, compared with 3 for SMTP2GO.
- Brevo fixes problems faster: 1h 24m on average, against 5h 39m for SMTP2GO (4.0× quicker).
- Brevo's longest outage on record lasted 2h 2m (Oct 1, 2026); SMTP2GO's lasted 1d 4h (Jan 22, 2026).
90-day uptime
Brevo
SMTP2GO
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Brevo incidents
- Degraded performanceOct 27, 2026 · resolved in 4h 21m
Affected: Contact Management API, Marketing email tracking links, Outbound Webhooks, Workflows, Contacts, Transactional emails tracking links +4 more
- Degraded performanceOct 26, 2026 · resolved in 2h 11m
Error with doubleOptinConfirmation API
Affected: Contact Management API
- InformationalOct 22, 2026 · resolved in 1h 55m
- Degraded performanceOct 19, 2026 · resolved in 20m
Affected: Account and Settings API
- Degraded performanceOct 15, 2026 · resolved in 10m
Affected: Workflows, Transactional emails tracking links, Transactional emails delivery, Brevo Tracker
- Degraded performanceOct 15, 2026 · resolved in 12m
Delay in Processing Loyalty API request
Affected: Loyalty API
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
- Twilio SendGrid · #4 · 99.98% uptime
See the full most reliable transactional email apis ranking →