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MailCatcher

APIyesOSS—FREE—DOCS4/5
MA6.7#11 of 28
outWeb—WindowsoutMacoutLinux—Android—iOS

Ranked in Email Testing Software ·No free plan on record

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About

MailCatcher is ranked #11 of 28 in email testing software on Inferse. It runs on API, Linux, macOS, Self-hosted, Web.

Compared on email testing software

API access
Yesmailcatcher.me

Facts

Purpose
MailCatcher runs a local SMTP server that captures messages and displays them in a web interface.mailcatcher.me · 4 Oct 2026
Message views
It displays HTML, plain text, and source versions of captured messages when available.mailcatcher.me · 4 Oct 2026
Images and links
It rewrites HTML to display embedded images and open links in a new window.mailcatcher.me · 4 Oct 2026
Attachments
It lists attachments, allows separate downloads of message parts, and can download the original email.mailcatcher.me · 4 Oct 2026
Live updates
Messages appear instantly in browsers with WebSockets support; otherwise the interface updates every thirty seconds.mailcatcher.me · 4 Oct 2026
Integrations
The maker documents setup examples for Rails, PHP, and Django.mailcatcher.me · 4 Oct 2026
API
Its URL API provides message lists and metadata in JSON, message HTML and plain text, attachment parts, and full source.mailcatcher.me · 4 Oct 2026
Installation
The maker documents installation as a Ruby gem and provides a Docker image.github.com · 4 Oct 2026
Requirements
The repository README says MailCatcher requires Ruby 3.3 or newer and notes build tools may be needed for dependencies.github.com · 4 Oct 2026
Limits
The maker says mail processing is basic and that UTF-8 is not completely supported directly over the wire.mailcatcher.me · 4 Oct 2026
License
The project is released under the MIT License.github.com · 4 Oct 2026
Support
The maker directs users to file an issue for problems and invites them to include the full message that caused trouble.mailcatcher.me · 4 Oct 2026
Intended use
The setup instructions direct applications to send mail to a local SMTP endpoint for inspection in development.mailcatcher.me · 4 Oct 2026

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Where it ranks on Inferse

Sources