Transactional Email APIs · reliability comparison
Brevo vs SparkPost (Bird): which is more reliable? (2026)
SparkPost (Bird) is more reliable than Brevo, scoring 87.7 vs 70.5 out of 100. Over the last 90 days Brevo reported 29 incidents and SparkPost (Bird) reported 8, with effective uptime of 99.68% and 99.90% respectively. Brevo resolves incidents faster on average (1h 24m).
Data updated Nov 1, 2026 · How we score
| Metric | Brevo | SparkPost (Bird) |
|---|---|---|
| Reliability score | 70.5 | 87.7 |
| Rank (transactional email APIs) | #8 | #5 |
| Uptime (90 days) | 99.68% | 99.90% |
| Incidents (90 days) | 29 | 8 |
| Partial / major outages | 5 | 0 |
| Avg time to resolve | 1h 24m | 2h |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Brevo and SparkPost (Bird) differ
- Brevo reported 3.6× as many incidents as SparkPost (Bird) over the last 90 days (29 vs 8).
- Brevo had 5 partial or major outages, compared with 0 for SparkPost (Bird).
- Brevo fixes problems faster: 1h 24m on average, against 2h for SparkPost (Bird).
- Brevo's longest outage on record lasted 2h 2m (Oct 1, 2026); SparkPost (Bird)'s lasted 7h 30m (Jul 24, 2026).
90-day uptime
Brevo
SparkPost (Bird)
- 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, Transactional emails delivery, Outbound Webhooks, Workflows, SMS Campaigns +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: Brevo Tracker, Workflows, Transactional emails tracking links, Transactional emails delivery
- Degraded performanceOct 15, 2026 · resolved in 12m
Delay in Processing Loyalty API request
Affected: Loyalty API
Recent SparkPost (Bird) incidents
- InformationalOct 30, 2026 · resolved in 22h 2m
Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only)
Affected: SMTP Delivery - USA
- Degraded performanceOct 28, 2026 · resolved in 1h 1m
Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only)
Affected: SMTP Delivery - USA
- Degraded performanceOct 11, 2026 · resolved in 3h 6m
Increased message delays in US and EU due to DNS resolution errors
Affected: SMTP Delivery - USA, SMTP Delivery - EUROPE
- Degraded performanceOct 1, 2026 · resolved in 31m
Affected: SMTP Delivery - USA, SMTP Delivery - EUROPE
- Degraded performanceSep 17, 2026 · resolved in 54m
Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only)
Affected: SMTP Delivery - USA
- Degraded performanceSep 14, 2026 · resolved in 2h 27m
Health Score and Cohort data is delayed
Affected: SparkPost Application - USA, SparkPost Application - EUROPE
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 →