Is Mailgun Open Source?
Mailgun is not open source, but there are 2 quality open source alternatives
While Mailgun itself is proprietary, the top open source alternative is Postal. Looking for more options? There are 2 open source alternatives to Mailgun. Other notable options include:
useSend.
These Mailgun alternatives primarily fall under Email Management, Internal Tools or Marketing Tools. Explore these categories for more options or browse our complete list of Mailgun alternatives.