It's an active directory replacement built on CentOS + Samaba4. Includes support for Directory, DNS, DCHP, and NTP type services.
Cost / License
- Free
- Open Source
Platforms
- Linux
- Self-Hosted




Zentyal is described as 'Linux platform integrating native Active Directory, domain, mail, gateway, and infrastructure server roles with web-based management for SMB environments' and is a popular Mail Server in the online services category. There are more than 25 alternatives to Zentyal for a variety of platforms, including Linux, Windows, Self-Hosted, Web-based and Mac apps. The best Zentyal alternative is ClearOS, which is both free and Open Source. Other great apps like Zentyal are Ubuntu Server, NethServer, Univention Corporate Server (UCS) and Microsoft Active Directory.
It's an active directory replacement built on CentOS + Samaba4. Includes support for Directory, DNS, DCHP, and NTP type services.




OpenLDAP Software is an open source implementation of the Lightweight Directory Access Protocol.

OpenLDAP is the most popular Mac alternative to Zentyal.
The Amahi Home Server is designed for home and small office environments where the technical support staff do not want the job!





Some users think Amahi Home Server is a great Zentyal alternative, some don't.
Linux based gateway for SMB with accent on security. With easy to use web-based configuration tool. With lots of additional features like mail server, VPN server, traffic shaping, DPI, traffic antivirus and etc.




Ubuntu Server GUI provides an easy to use set of server management tools designed for Ubuntu Servers.

Get a web based email/messaging, HTTP proxy, files server, VPN administration interface Using Postfix, Squid, Samba And extend them with Security quickly and easily How to create a Mail/Proxy/File



EmailSuccess, an advanced SMTP Server (MTA) built from the ground up to handle the most critical reliability, performance, security, and deliverability requirements.




Linux Schools consists of Karoshi Server and Karoshi client. It is an Ubuntu LTS Server based solution especially designed for educational environments. It is a fully modular and scalable distribuition, mainly written in Bash.

Hosted Exchange solutions from Netrepid - the best hosted exchange provider. Accelerate your technology at on demand speed.
Sanwhole Exchange is a server running iMail, iPress and iStore services. iMail is an enterprise-class email server does Microsoft Exchange and Gmail work. iPress sets blog, forums and tickets in one. iStore is an online store.



pGina is a replacement for the default Windows Credential Provider. Through plugins, pGina allows you to configure the login process from authentication and authorization through Radius, SSH, Kerberos, POP, IMAP,... remote servers.

DeskNow is a fully featured and easy to use mail and collaboration server with build-in antivirus and antispam. SyncML for mobile devices is separately licensed.


less features, zentyal had a lot more features, Amahi is outdated