Mailgun

Email infrastructure with sending API, inbound routing and validation.

Category	Email & newsletters
Pricing	Freemium
Tags	transactional, api
Official site	mailgun.com

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Pricing: Freemium

Freemium means there is a free plan or free version, with paid plans for higher limits or more features. Open-source tools that are free to self-host but charge for their cloud version are tagged this way too.

Pricing changes often. The tags were compiled in October 2026 and may be out of date, so confirm on the official pricing page before you pay.