Compare software

Inbucket vs Papercut SMTP: catalog facts
Inbucket	Papercut SMTP
Free Free and open source under the MIT licence.	Free Free and open source under the Apache-2.0 licence.
Windows, Linux, Self-hosted	Windows, Self-hosted
Accepts mail for any address without setup Web interface plus SMTP and POP3	Catches test emails without sending them Simple desktop interface for reading captured messages
Meant for testing, not for real mail delivery You run and maintain the server yourself	Meant for testing, not a real mail server Desktop app is Windows-only
Downloadable app, Self-hosted	Downloadable app, Self-hosted
Open source	Open source
License: MIT	License: Apache-2.0
No account needed	No account needed
Works offline	Works offline
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.