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OpenAlternative

Open Source Mailgun Alternatives

A curated collection of the 3 best open source alternatives to Mailgun.

The best open source alternative to Mailgun is Sessy. If that does not suit you, we have compiled a ranked list of other open source Mailgun alternatives to help you find a suitable replacement.

Mailgun alternatives are mainly Email & Communication. Browse these if you want a narrower list of alternatives or are looking for a specific functionality of Mailgun.

Written by OpenAlternative Last updated: June 2, 2026
#1

Sessy

Track SES deliveries, bounces, opens and clicks in a self-hosted dashboard with real-time search, analytics and reputation monitoring.

Track SES deliveries, bounces, opens and clicks in a self-hosted dashboard...

#2

Hyvor Relay

Self-hosted email API alternative to AWS SES & Mailgun. Open-source AGPL-3.0 with enterprise features, automated deliverability, and cloud version com

Self-hosted email API alternative to AWS SES & Mailgun. Open-source AG...

#3

DoubleZero

00 is an open-source email API and infrastructure solution that allows developers to own and control their email stack.

00 is an open-source email API and infrastructure solution that allows dev...