Mailpit Alternatives

Apps similar to Mailpit include Postfix, which is free and open source. Other options are MailGrab, Gmailnator (Emailnator), MailHog and Mailcatch.app. There's no shortage of Mail Servers like Mailpit, with more than 25 alternatives for the web, Mac, Linux, Windows and self-hosting.

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Mailpit alternatives page was last updated Oct 4, 2026

Lettre
Like
Lettre is a mailer library for Rust.
Cost / License
Free
Open Source (MIT)
Platforms
Mac
Windows
Linux
Good alternative?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)
Good alternative?Is MailSpons a good alternative to Mailpit?
fakemail.stream
Like
A fake SMTP server for software integration testing.
Cost / License
Free
Open Source (AGPL-3.0)
Application type
Mail Server
Platforms
Online
Good alternative?Is fakemail.stream a good alternative to Mailpit?
DevMail
Like
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.
29 DevMail alternatives
Cost / License
Paid
Proprietary
Application type
Mail Server
Origin
United Kingdom
Platforms
Online
United Kingdom
Good alternative?Is DevMail a good alternative to Mailpit?
VaultSandbox
Like
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.
Cost / License
Free
Open Source (Apache-2.0)
Application type
Automated Testing
Platforms
Self-Hosted
Docker
Good alternative?Is VaultSandbox a good alternative to Mailpit?
Mailsnag
Like
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 typeApplication types
Mail Server
Automated Testing
Origin
United States
Platforms
Online
United States
+1
Good alternative?Is Mailsnag a good alternative to Mailpit?
MailFixture
Like
Disposable email inboxes via API for testing signup and authentication flows, with automatic extraction of one-time passwords and magic links.
Cost / License
Freemium
Proprietary
Application type
Automated Testing
Platforms
Online
Software as a Service (SaaS)
Good alternative?Is MailFixture a good alternative to Mailpit?
Mailnest
Like
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)
United Kingdom
+1
Good alternative?Is Mailnest a good alternative to Mailpit?
Zyntra
1 like
Zyntra is a disposable email platform for QA teams and test automation workflows.
Cost / License
Freemium
Proprietary
Application type
Automated Testing
Origin
Ukraine
Platforms
Online
Software as a Service (SaaS)
Ukraine
+3
Good alternative?Is Zyntra a good alternative to Mailpit?
InboxFox
Like
Native macOS SMTP email testing with HTML previews, quality checks, multiple mailboxes, a Mailpit-compatible API, and MCP.
Cost / License
Freemium
Proprietary
Origin
United States
Platforms
Mac
United States
+3
Good alternative?Is InboxFox a good alternative to Mailpit?
Go-Guerrilla
Like
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
Good alternative?Is Go-Guerrilla a good alternative to Mailpit?
S
S
SMTP Bucket
Like
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
S
Good alternative?Is SMTP Bucket a good alternative to Mailpit?