Mailgun vs SendGrid: reliability compared
Based purely on the incidents the providers themselves published on their official status pages over the last 90 days. Both services show equivalent uptime over the period.
How to read this
Mailgun currently reports “Degraded performance”, SendGrid reports “Degraded performance”. A provider that publishes a lot of incidents is not necessarily less reliable — it is often the sign of an honest, granular status page. The number that matters is total downtime, shown above.