Top 12 Open-Source Alternatives to SOGo

The top open-source alternatives to SOGo are Roundcube, Rainloop, and iRedMail. 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.

Roundcube Landing Page
1

Roundcube

Web-based IMAP email client
Pricing:
- Open Source
#Email #SMTP Server #Email Clients 16 social mentions
Rainloop Landing Page
2

Rainloop

RainLoop is a web based email client.
Pricing:
- Open Source
#Email #Email Clients #Email Management
iRedMail Landing Page
3

iRedMail

A fully fledged, free email server solution, an open source project (GPL v2).
Pricing:
- Open Source
#Email #SMTP Server #Self-hosted Email 2 social mentions
Baïkal Landing Page
4

Baïkal

Cal and CardDAV server
Pricing:
- Open Source
#Network & Admin #Email #Email Clients 22 social mentions
mailcow Landing Page
5

mailcow

An open source mailserver suite.
Pricing:
- Open Source
#Email #Self-hosted Email #Email Service Provider 82 social mentions
Radicale Landing Page
6

Radicale

The Radicale Project is a complete CalDAV (calendar) and CardDAV (contact) server solution.
Pricing:
- Open Source
#Email #Email Clients #Network & Admin 15 social mentions
Xandikos Landing Page
7

X

Xandikos

Lightweight CalDAV/CardDAV server on top of Git.
Pricing:
- Open Source
#Network & Admin #Email #Email Clients
Mailpile Landing Page
8

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
9

Squirrelmail

SquirrelMail is a standards-based webmail package written in PHP.
Pricing:
- Open Source
#Self-hosted Email #Enterprise Communication #Email 3 social mentions
Mail-in-a-box Landing Page
10

Mail-in-a-box

Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software and also includes contacts and calendar synchronization.
Pricing:
- Open Source
#Email #Self-hosted Email #Email Service Provider 115 social mentions
Cypht Landing Page
11

Cypht

All your E-mail, from all your accounts, in one place. Cypht is like a news reader, but for E-mail.
Pricing:
- Open Source
#Email #Email Clients #Email Management 4 social mentions
Nextcloud Calendar Landing Page
12

Nextcloud Calendar

The Calendar app is a user interface for Nextcloud's CalDAV server.
Pricing:
- Open Source
#Calendar #Appointments and Scheduling #Email 4 social mentions