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Mailpit vs Mailtrap: catalog facts
Mailpit	Mailtrap
Free Free to download and run.	Freemium Self-serve sign-up with published pricing for paid tiers.
Web, Self-hosted, Command line	Web
Single binary or Docker image with no dependencies HTML compatibility, link and spam checks built in	Captures test emails without reaching real inboxes Previews rendering across 100+ email clients and devices
For testing only, not a real mail client Spam scoring relies on a SpamAssassin setup	Hosted service only Much of the product focuses on sending email rather than testing
Downloadable app, Self-hosted	Web application, Hosted service
Open source	Closed source
License not stated	License not stated
No account needed	Account needed
Works offline	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.