Mailpit Alternatives

Mailpit is described as 'An email and SMTP testing tool with API for developers' and is an app in the development category. There are more than 25 alternatives to Mailpit for a variety of platforms, including Web-based, Mac, Linux, Windows and SaaS apps. The best Mailpit alternative is Postfix, which is both free and Open Source. Other great apps like Mailpit are Gmailnator (Emailnator), MailHog, Mailcatch.app and txen.de.

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Mailpit alternatives page was last updated Jan 29, 2026

Lettre
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Lettre is a mailer library for Rust.
6 Lettre alternatives
Cost / License
Free
Open Source (MIT)
Platforms
Mac
Windows
Linux
Is Lettre a good alternative to Mailpit?
MailSpons
1 like
Fake SMTP server for safe email testing. Stop accidentally spamming your customers.
Cost / License
Free
Proprietary
Application type
Mail Server
Platforms
Online
Software as a Service (SaaS)
Is MailSpons a good alternative to Mailpit?
fakemail.stream
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A fake SMTP server for software integration testing.
Cost / License
Free
Open Source (AGPL-3.0)
Application type
Mail Server
Platforms
Online
Is fakemail.stream a good alternative to Mailpit?
DevMail
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DevMail is an email sandbox service for software developers. It allows developers to capture emails from various environments and inspect HTML, text, source code, raw headers, and attachments, and improve deliverability by analyzing email spam scores.
Cost / License
Paid
Proprietary
Application type
Mail Server
Origin
United Kingdom
Platforms
Online
Is DevMail a good alternative to Mailpit?
VaultSandbox
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A self-hosted SMTP testing gateway designed to replicate production email behavior—including TLS, DNS, authentication, and spam scoring—so your email tests reflect real-world conditions.
10 VaultSandbox alternatives
Cost / License
Free
Open Source (Apache-2.0)
Application type
Automated Testing
Platforms
Self-Hosted
Docker
Is VaultSandbox a good alternative to Mailpit?
Mailsnag
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Mailsnag lets you build resilient SMTP integrations while protecting you from spamming customers during testing on QA and Staging environments. It is like Chaos Monkey for SMTP integrations.
Cost / License
Freemium
Proprietary
Application types
Mail Server
Automated Testing
Origin
United States
Platforms
Online
+1
Is Mailsnag a good alternative to Mailpit?
Mailnest
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Mailnest is an all in one email QA tool for development & testing teams in IT companies to test & improve email functionality.
Cost / License
Paid
Proprietary
Origin
United Kingdom
Platforms
Software as a Service (SaaS)
+1
Is Mailnest a good alternative to Mailpit?
Go-Guerrilla
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A lightweight SMTP server written in Go, made for receiving large volumes of mail. To be used as a package in your Go project, or as a stand-alone daemon by running the "guerrillad" binary.
Cost / License
Free
Open Source (MIT)
Platforms
Online
Is Go-Guerrilla a good alternative to Mailpit?
SMTP Bucket
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A fake SMTP server for e-mail integration testing. We capture all the e-mails we receive and make them available via our website and REST API.
Cost / License
Free
Proprietary
Origin
United States
Platforms
Online
Is SMTP Bucket a good alternative to Mailpit?
SendPit
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Sendpit is a hosted email testing sandbox designed for developers and QA teams. It allows applications to send emails to a safe inbox where messages can be inspected, debugged, and tested without being delivered to real users.
9 SendPit alternatives
Cost / License
Freemium
Proprietary
Origin
India
Platforms
Online
Software as a Service (SaaS)
Is SendPit a good alternative to Mailpit?