Top 4 Open-Source Alternatives to OpenMailBox

Product categories

Calendar Email Email Clients Email Management Enterprise Communication Hosted Email SMTP Server Self-hosted Email

Summary

The top open-source alternatives to OpenMailBox are Tutanota, Roundcube, and Mailpile. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Tutanota Landing Page
1

Tutanota

Get your encrypted mailbox for free.
Pricing:
- Open Source
#Email #Email Clients #Enterprise Communication 177 social mentions
Roundcube Landing Page
2

Roundcube

Web-based IMAP email client
Pricing:
- Open Source
#Email #Email Clients #SMTP Server 16 social mentions
Mailpile Landing Page
3

Mailpile

Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.
Pricing:
- Open Source
#Email #Email Clients #Email Management
Squirrelmail Landing Page
4

Squirrelmail

SquirrelMail is a standards-based webmail package written in PHP.
Pricing:
- Open Source
#Self-hosted Email #Enterprise Communication #Email 3 social mentions