Best Ubuntu Server Alternatives & Competitors in 2025

Linux directory, domain, mail, gateway and infrastructure server for SMBs.

OpenMediaVault is the next generation network attached storage (NAS) solution based on Debian Linux.

Open Source

High performance web components for SaaS apps - including Gantt, Scheduler, Grid, Calendar and Kanban widgets. Seamless integration with React, Vue, Angular or plain JS apps.

Try for free Free Trial $850.0 / One-off (OEM license for commercial use)

NethServer is an operating system for Linux enthusiasts, designed for small offices and medium...

A very good alternative for Windows Server, for free

Univention Corporate Server UCS with Active Directory functions and App Center is the cost-efficient and popular successor to Microsoft's server solutions.

TrueNAS Core (formerly FreeNAS) is a storage operating system strong and robust enough to meet the needs of enterprise level businesses.

pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more

Open Source

Rockstor is a free and open source NAS (Network Attached Storage) operating system.

Simplicity. Flexibility. Scalability. Modularity. Unraid empowers you to build the system you’ve always wanted using your preferred hardware, software, and operating systems.

File Sharing, OS & Utilities, and Security & Privacy

Increase security, evolve your datacenter, and innovate faster with Microsoft Windows Server, the cloud-ready operating system.

You've reached the website for Arch Linux, a lightweight and flexible Linux® distribution that tries to Keep It Simple. Currently we have official packages optimized for the x86-64 architecture.

Open Source

openSUSE is a free and Linux-based operating system for your PC, Laptop or Server.