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Inbucket vs smtp4dev

The same facts for both, read from GitHub every night, and the relation a person reviewed.

Inbucketsmtp4dev
LanguageGoC#
LicenceMITBSD-3-Clause
Stars2.3k4k
Latestv3.1.13.15.0
Last push2026-10-062026-10-05
Release cadenceabout 269 days between releasestoo few releases
Active contributors2 commit authors on the default branch in the last 90 days4 commit authors on the default branch in the last 90 days
Flagsnonenone

How they relate

  • Both replace Mailtrap. Alternatives to Mailtrap →

    PartialInbucketThe email sandbox only, with a web inbox, POP3 and a REST API; no sending service.

    Partialsmtp4devThe email sandbox only, with a web inbox, IMAP access and relay rules; no sending service.