Top 12 Open-Source Alternatives to Posteo

Product categories

Calendar Disposable Email Email Email Archiving Email Clients Email Management Email Productivity Email Security Email Service Provider Enterprise Communication SMTP Server Self-hosted Email

Summary

The top open-source alternatives to Posteo are Tutanota, YMOZ, and Roundcube. 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
YMOZ Landing Page
2

YMOZ

Secure, private email built with open source components
Pricing:
- Open Source
#Email #Secure Email #Email Clients
Roundcube Landing Page
3

Roundcube

Web-based IMAP email client
Pricing:
- Open Source
#Email #Email Clients #SMTP Server 16 social mentions
Mailpile Landing Page
4

Mailpile

Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.
Pricing:
- Open Source
#Email #Email Clients #Email Management
FairEmail Landing Page
5

FairEmail

Open source, privacy friendly email app
Pricing:
- Open Source
#Email #Email Clients #Calendar 52 social mentions
Thexyz Landing Page
6

Thexyz

Secure premium email service with mobile sync apps for calendar, contacts, tasks, notes and FISMA compliant email archiving.
Pricing:
- Open Source
- Paid
- $2.95 / Monthly (25GB)
#Email #Email Security #Email Archiving 1 social mentions
mailcow Landing Page
7

mailcow

An open source mailserver suite.
Pricing:
- Open Source
#Email #Self-hosted Email #Email Service Provider 82 social mentions
Criptext Landing Page
8

Criptext

Criptext - Security that goes beyond encryption.
Pricing:
- Open Source
#Email #Email Clients #Email Service Provider 3 social mentions
SOGo Landing Page
9

SOGo

SOGo is groupware server with a focus on scalability and open standards.
Pricing:
- Open Source
#Email #Email Clients #Self-hosted Email 1 social mentions
iRedMail Landing Page
10

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
Rainloop Landing Page
11

Rainloop

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

Firefox Relay

Keep your email safe from hackers & trackers...
Pricing:
- Open Source
#Email #Fake Email #Disposable Email 82 social mentions