Products

Mailpit

Mailpit - email & SMTP testing tool with API for developers

mailpit.axllent.org Source★ 10.9KMITSoftware Development / Testing & Code Quality

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Desktop
Mobile
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None yet
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Public revenue
Undisclosed
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Entry price
Free
No monthly subscription pricing
Creators
axllent
GitHub @axllent
Launched
Unknown
No public launch record

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Last 12 months
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Acquisition breakdowns, engineer reviews & open-source metrics
selfh.st★ 10.9K Stars · 378 ForksMITGo
2022-07-29Source
Replaces / alternatives to:
Gmail · Microsoft Outlook · Firebase

Email testing tool and API for developers

Console.dev
2023-07-27Source
What engineers like:
Acts as a mail server (SMTP or API) for testing emails from your code. Static binary so can easily be run in CI/CD. API allows querying of received emails so you can check they were correctly “sent”. Can persist mail to a SQLite database. Has a web UI to inspect mail e.g. for local development.
Trade-offs & limitations:
Designed for integration testing rather than as a library for unit testing or mocking - which is probably what you want for email tests, but means you need to configure it as a service. Includes Docker images to support this.
Best suited for:
Developers doing local development should consider mailpit

Open Source & Self-Hosting

GitHub · MCP / Skill
axllent/mailpitSelf-hostable
Last commit 2026-11-09
GitHub Stars
★ 10.9K
Forks
378
License
MIT
Primary language
Go
Open-source alternative to:GmailMicrosoft OutlookFirebaseBrowse peer open-source projects →

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Traffic data: Vaneform

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Trial: None · Observed 2026-11-09 · Source page

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Tracked since 2026-11-04

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Questions & evidence

What is Mailpit and what platforms does it support?
Mailpit is catalogued under Testing & Code Quality: Mailpit - email & SMTP testing tool with API for developers. Supported platforms: API.
Is Mailpit open source?
Mailpit has a public repository (https://github.com/axllent/mailpit) under the MIT license, recording 10.9K GitHub stars, and supporting self-hosted deployment.Source

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