Top 12 Open-Source Alternatives to IceWarp

Product categories

CRM CRM Platforms Calendar Email Email Clients Email Delivery Email Management Email Service Provider Enterprise Communication MTA SMTP Server Self-hosted Email

Summary

The top open-source alternatives to IceWarp are iRedMail, Roundcube, and mailcow. 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.

iRedMail Landing Page
1

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
Roundcube Landing Page
2

Roundcube

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

mailcow

An open source mailserver suite.
Pricing:
- Open Source
#Email #Self-hosted Email #Email Service Provider 82 social mentions
OpenSMTPD Landing Page
4

OpenSMTPD

OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with...
Pricing:
- Open Source
#SMTP Server #Email #MTA 2 social mentions
Squirrelmail Landing Page
5

Squirrelmail

SquirrelMail is a standards-based webmail package written in PHP.
Pricing:
- Open Source
#Self-hosted Email #Enterprise Communication #Email 3 social mentions
Exim Landing Page
6

Exim

Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.
Pricing:
- Open Source
#SMTP Server #Email #MTA
Mail-in-a-box Landing Page
7

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
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
WikiSuite Landing Page
9

WikiSuite

While Wikipedia is the broadest unified body of knowledge, WikiSuite is the most comprehensive and integrated Open Source enterprise solution.
Pricing:
- Open Source
- Free
#Enterprise Content Management #Enterprise Communication #Team Collaboration
Bitrix24 Landing Page
10

Bitrix24

Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!
Pricing:
- Open Source
- Freemium
- Free Trial
- $69.0 / Monthly (6 users / 50 GB / CRM+)
#Project Management #Task Management #Communication
Rainloop Landing Page
11

Rainloop

RainLoop is a web based email client.
Pricing:
- Open Source
#Email #Email Clients #Email Management
Courier-MTA Landing Page
12

Courier-MTA

The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open...
Pricing:
- Open Source
#SMTP Server #MTA #Email