Top Alternatives to Citrix XenServer

VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use. As an open-source, freely available software, it allows users to run multiple operating systems simultaneously on a single physical machine. This enables diverse use cases, from software development and testing to creating isolated environments for everyday tasks.

Xen Project is a widely adopted open-source hypervisor known for its performance and robust security features. Utilizing a microkernel design, it enables multiple operating systems to run concurrently on the same hardware, making it ideal for cloud computing and server virtualization.

VMware vSphere Hypervisor, also known as ESXi, is a free, bare-metal hypervisor that allows users to virtualize their server hardware, consolidating applications and improving resource utilization. It provides a robust foundation for building virtualized IT environments.

KVM (Kernel-based Virtual Machine) is a powerful, integrated virtualization solution for Linux, turning the kernel into a hypervisor. It enables running multiple virtual machines with unmodified Linux or Windows guest operating systems, leveraging standard Linux scheduling and memory management.

Proxmox VE is a leading open-source platform for enterprise virtualization. It integrates KVM and LXC, offering a unified solution for managing virtual machines and containers via a central web interface.

Microsoft Hyper-V Server is a dedicated, lean hypervisor-based virtualization platform for creating and managing virtual machines. It provides core virtualization capabilities including live migration and clustering, offering a robust foundation for datacenter and cloud environments.

Portable-VirtualBox allows you to run virtual machines directly from a USB drive without requiring an installation on the host computer. It provides a convenient and portable way to access different operating systems and applications.

clearVM is a comprehensive, private cloud management solution designed for effortless administration of virtual machines and servers. It simplifies complex virtualization tasks, offering robust remote management capabilities via a intuitive web interface.

Paperspace offers a powerful GPU cloud computing platform designed for a wide range of users, from individual developers and creative professionals to startups and large enterprises. It provides accessible virtual machines optimized for tasks requiring high graphical processing power, including machine learning, data science, game streaming, and virtual desktop infrastructure (VDI).

Bochs is a highly portable, open-source IA-32 and x86-64 IBM PC emulator and debugger. Primarily written in C++, it allows users to run various operating systems and software designed for x86 architectures on different platforms, offering a low-level emulation of hardware components.

oVirt is a robust, free, and open-source virtualization management platform for managing virtual machines, networks, and storage, offering a comprehensive solution for enterprise virtualization needs.

unRAID Server is a powerful network-attached storage (NAS) operating system that also functions as a robust application server and hypervisor. It's designed for home and small business users who need flexible storage, media serving, and the ability to run various applications and virtual machines from a single platform.