Work · alternatives · 2026

24 alternatives to ProtonMail Bridge

IMAP and SMTP support for ProtonMail accounts.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. ProtonMail Bridge launched in 2017; newer entries below may have overtaken it.

1
ProtonMail▲199
End-to-end encrypted email - now on iOS & Android
2016 · proton.me · its alternatives →
2
Polymail▲1,567
A simple, beautiful, and powerful email client for Mac
2015 · polymail.io · its alternatives →
3
Airmail 3▲555
A simple, beautiful email client for Mac and iOS
2016 · airmailapp.com · its alternatives →
4
Mailbox for Mac (Beta)▲490
Fly through your email. Now on Mac
2014 · theverge.com · its alternatives →
5
Mailbird for Mac▲373
Email the way you like it, now on Mac
2024 · getmailbird.com · its alternatives →
6
ProtonMail▲82
End-to-end encrypted email, based in Switzerland.
2014 · proton.me · its alternatives →
7
Loop Email▲257
Emailing for teams: Organize your Inbox into channels 💌
2018 · intheloop.io · its alternatives →
8
Mimestream, a native macOS email client for Gmail▲403
A native macOS email client for Gmail
2020 · mimestream.com · its alternatives →
9
Mimestream▲224
A native macOS email client for Gmail
2020 · mimestream.com · its alternatives →
10
Mailwork▲88
Free IMAP mailbox integration for effective email marketing
2017 · its alternatives →
11
End-to-end encrypted email, based in Switzerland▲45
Proton Mail is the world’s largest secure email service with over 100 million users. Available on Web, iOS, Android, and desktop. Protected by Swiss privacy law.
2014 · protonmail.ch · its alternatives →
12
MailConverterTools IMAP Migration Tool▲9
Trusted utility to backup IMAP emails and attachments
2024 · mailconvertertools.com · its alternatives →
13
EmailEngine▲165
Access any email account to receive/send emails with an API
2021 · emailengine.app · its alternatives →
14
ProtonMail▲144
Encrypted email, made simple. Now open to everybody.
2015 · proton.me · its alternatives →
15
Mimestream 1.0▲175
A native macOS email client for Gmail
2023 · mimestream.com · its alternatives →
16
Mailbutler 2.0▲162
Your personal assistant for Gmail and Apple Mail 📬
2018 · mailbutler.io · its alternatives →
17IA
IMAP API – Self-hosted access to IMAP over REST▲125
2020 · imapapi.com · its alternatives →
18
WunderMail for Gmail▲145
The missing native desktop client for Gmail on Windows 10.
2018 · its alternatives →
19
Horcrux, a Mac app to back up or move your IMAP emails▲54
Hi, Creator here. I'm sort of reposting the same thing from about 208 days ago. The first version kinda sucked. I guess this is my first lean not-really-a startup experience. The new version is much better. http://thehorcrux.com/why-i-built-horcrux-app/ Let me know what you think, Here are some promo codes: 97HNR6HW4EPH K9R7KTWPTJJ6 WPM3MK4WXNHY 3P7N9RNPF4M4 3N49NP9P7TR6 Cheers, Suhas Sharma
2013 · thehorcrux.com · its alternatives →
20
Mail Merge▲104
Mass Personalized Mail in Gmail.
2014 · labnol.org · its alternatives →
21
A minimal web-based IMAP client for use on untrusted machines▲18
Access predefined IMAP mailboxes with a browser using one time passwords or a YubiKey - dividuum/one-time-mail
2016 · github.com · its alternatives →
22
SandMails▲73
Stop losing time organizing your emails.
2018 · sandmails.com · its alternatives →
23
Mailplane 4▲101
The best way to use Gmail on your Mac
2018 · mailplaneapp.com · its alternatives →
24
Cypht – Unique Open Source Webmail▲110
Cypht is a lightweight, open-source webmail client that combines all your email accounts and RSS feeds into one unified, streamlined inbox. Supports IMAP, SMTP, JMAP, and EWS.
2016 · cypht.org · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →