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Inbucket vs Mailtrap: catalog facts
Inbucket	Mailtrap
Free Free and open source under the MIT licence.	Freemium Self-serve sign-up with published pricing for paid tiers.
Windows, Linux, Self-hosted	Web
Accepts mail for any address without setup Web interface plus SMTP and POP3	Captures test emails without reaching real inboxes Previews rendering across 100+ email clients and devices
Meant for testing, not for real mail delivery You run and maintain the server yourself	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: MIT	License not stated
No account needed	Account needed
Works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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