Postaci AlternativesWebMail Providers and other similar apps like Postaci

Postaci is described as '(Turkish for Postman) is multiplatform Webmail software which is database independent, multilanguage, POP3/IMAP, and fully MIME-compatible. While using POP3 mode to fetch messages it uses database fields to simulate IMAP folders, on which you can save, move, delete, and' and is a webmail provider in the online services category. There are more than 10 alternatives to Postaci for a variety of platforms, including Self-Hosted, Web-based, Linux, PHP and Cloudron apps. The best Postaci alternative is Roundcube, which is both free and Open Source. Other great apps like Postaci are Mailpile, Kolab, Rainloop and Zimbra Collaboration Suite.

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Postaci alternatives page was last updated Oct 30, 2025

Roundcube
170 likes
Roundcube webmail is a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an e-mail client, including MIME support, address book, folder manipulation, message searching and spell checking.
27 Roundcube alternatives
Cost / License
Free
Open Source
Application types
WebMail Provider
Email Client
Origin
Switzerland
Platforms
Self-Hosted
PHP
Cloudron
Nextcloud
+9
Is Roundcube a good alternative to Postaci?
Roundcube is the most popular Self-Hosted alternative to Postaci.
Roundcube is the most popular Open Source & free alternative to Postaci.
Roundcube is Free and Open SourcePostaci is also Free and Open Source
Mailpile
117 likes
Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features. The development of Mailpile is funded by a large community of backers and all code related to the project is and will be released under an OSI approved Free Software license.
59 Mailpile alternatives
Cost / License
Free
Open Source
Application types
Email Client
WebMail Provider
Alerts
Discontinued
Platforms
Linux
Online
Self-Hosted
OpenPGP
Is Mailpile a good alternative to Postaci?
Mailpile is the most popular Web-based & Linux alternative to Postaci.
Mailpile is Free and Open SourcePostaci is also Free and Open Source
Kolab
43 likes
Kolab provides a FOSS communication & collaboration solution that can be completely self-hosted. Take back control of your data and access it via the webinterface, or existing mobile & desktop clients.
Cost / License
Freemium (Subscription)
Open Source
Application type
Calendar App
Origin
Switzerland
Platforms
Linux
Online
Self-Hosted
Is Kolab a good alternative to Postaci?
Rainloop
58 likes
Simple, modern & fast web-based email client. Modest system requirements, decent performance, simple installation and upgrade, no database required. All these make RainLoop Webmail a perfect choice for your email solution.
13 Rainloop alternatives
Cost / License
Free
Open Source
Application types
WebMail Provider
Email Client
Origin
Estonia
EU
Alerts
Discontinued
Platforms
Online
Self-Hosted
Nextcloud
JavaScript
PHP
Cloudron
Is Rainloop a good alternative to Postaci?
Zimbra Collaboration Suite
35 likes
Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors.
45 Zimbra Collaboration Suite alternatives
Cost / License
Pay once
Proprietary
Application types
Mail Server
Team Collaboration Tool
Origin
United States
Platforms
Linux
Online
Self-Hosted
Is this a good alternative to Postaci?
Zimbra Collaboration Suite is the most popular commercial alternative to Postaci.
Zimbra Collaboration Suite is Paid and ProprietaryPostaci is Free and Open Source
SnappyMail
7 likes
The drastically upgraded & secured fork of RainLoop Webmail Community edition.
13 SnappyMail alternatives
Cost / License
Free
Open Source
Application type
Email Client
Origin
Netherlands
EU
Platforms
Self-Hosted
UNIX Web Browser
Cloudron
Is SnappyMail a good alternative to Postaci?
Nexmail
2 likes
NexMail is an open-source, modern webmail client designed for self-hosted email servers. Enjoy a clean, intuitive interface with powerful features for managing your emails efficiently.
Cost / License
Free
Open Source
Application types
WebMail Provider
Email Client
Origin
Pakistan
Platforms
Self-Hosted
PHP
+8
Is Nexmail a good alternative to Postaci?
Horde
29 likes
Horde Groupware is a free, enterprise ready, browser based collaboration suite. Users can manage and share calendars, contacts, tasks and notes with the standards compliant components from the Horde Project.
Cost / License
Free
Open Source
Application type
WebMail Provider
Alerts
Discontinued
Platforms
Online
Self-Hosted
Is Horde a good alternative to Postaci?
Squirrelmail
24 likes
SquirrelMail is a standards-based webmail package written in PHP. It includes built-in pure PHP support for the IMAP and SMTP protocols, and all pages render in pure HTML 4.0 (with no JavaScript required) for maximum compatibility across browsers.
Cost / License
Free
Open Source
Application type
WebMail Provider
Platforms
Self-Hosted
PHP
Is Squirrelmail a good alternative to Postaci?
Webmail Lite
17 likes
Open Source WebMail Lite is a free community edition of full-featured WebMail Pro server application intended for users who need a clean and simple web mail application, which is fast and easy to use. Whether you need a free web browser based email client software for Windows ASP.
Cost / License
Free
Open Source
Application type
WebMail Provider
Origin
United States
Platforms
Online
Self-Hosted
+2
Is Webmail Lite a good alternative to Postaci?
Cypht
10 likes
All your E-mail, from all your accounts, in one place. Cypht is like a news reader, but for E-mail. Cypht does not replace your existing accounts - it combines them into one. And it's also a news reader :).
Cost / License
Free
Open Source
Application type
Email Client
Origin
United States
Platforms
Self-Hosted
Is Cypht a good alternative to Postaci?
CacoCloud
10 likes
A simple, fast and secure PHP/AngularJS based single user feed and mail reader, password and bookmark manager. CacoCloud is divided into a RESTful PHP backend storing all data into a SQLite database and an SPA frontend based on AngularJs.
Cost / License
Free
Open Source
Application types
RSS Reader
News Reader
Origin
Germany
EU
Alerts
Discontinued
Platforms
Self-Hosted
AngularJS
Is CacoCloud a good alternative to Postaci?

12 of 20 Postaci alternatives