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Virtuozzo (company)

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Company typePrivately held company
IndustryCloud computing
ProductsVirtuozzo Hybrid Infrastructure
Virtuozzo Hybrid Server
Virtuozzo Application Platform
Virtuozzo Cloud Platform for VMware
Virtuozzo Storage
Virtuozzo Linux
Number of employees
355 (2022)

Virtuozzo is a software company that develops virtualization and cloud management software for cloud computing providers, managed services providers and internet hosting service providers. The company's software enables service providers to offer Infrastructure as a service, Container-as-a-Service, Platform as a service, Kubernetes-as-a-Service, WordPress-as-a-Service and other solutions.


The company was founded as SWsoft in 1997 as a privately held server automation and virtualization company.[1] In 2000, the company released the first commercially available operating system-level virtualization container technology. In 2003, SWsoft acquired the makers of Confixx and Plesk web hosting products: Plesk Server Administration (PSA) control panel and Confixx Professional hosting software.[2] Virtuozzo was the core enabling technology behind SWsoft's HSP Complete solution.[3][2] In 2004, SWsoft acquired Parallels, Inc.

In 2005, the company open-sourced its operating system-level virtualization technology as OpenVZ. In 2007, SWsoft announced that it had changed its name to Parallels and would distribute its products under the Parallels name.[4][5][6]

In December 2015, Virtuozzo was spun out from Parallels to become a standalone company. In May 2016, Virtuozzo announced its intention to join the Open Container Initiative.

In July 2021, Virtuozzo acquired OnApp.[7] In October of that year, the company acquired Jelastic.[8]

List of products[edit]

Open-source products[edit]

  • OpenVZ is an operating-system-level virtualization technology for Linux
  • VzLinux is a Linux distribution that is based on the source code of Red Hat Enterprise Linux (RHEL)
  • CRIU is a software tool that is used to freeze and restore running Linux applications
  • P.Haul - Python-based mechanism on top of CRIU, intended for live migration of containers and memory-touching processes inside.

Virtuozzo is a contributor to other open-source projects, including the Linux kernel, libvirt, KVM, Docker, QEMU, LXC, runc/libcontainer and Libct.


Number Acquisition date Company Business Country Used as or integrated with Refs.
1 August 2021 OnApp OnApp Cloud Platform  United Kingdom Cloud Platform for service providers, VMware cloud management portal, CDN platform [9][10]
2 October 2021 Jelastic Jelastic Platform as a service  United States Virtuozzo Application Platform, Virtuozzo Application Platform for WordPress [11][12]


  1. ^ Mellor, Chris (2019-02-07). "Virtuozzo Storage is "like Ceph, only faster"". Blocks and Files. Retrieved 2023-01-09.
  2. ^ a b Torode, Christina (2003-06-09). "SWsoft Acquires Two Hosting Software Vendors". CRN. Retrieved 2023-01-11.
  3. ^ "Product of the Day: Virtuozzo". Linux Journal. 2002-02-05. Retrieved 2023-02-15.
  4. ^ Scott Ferguson (December 12, 2007). "SWsoft Changing Name to Parallels". eWeek. Retrieved 5 December 2022.
  5. ^ Ashlee Vance (December 12, 2007). "SWsoft to abandon itself and become Parallels". The Register. Retrieved 5 December 2022.
  6. ^ Kusnetzky, Dan (2007-12-12). "SWsoft Renames Itself "Parallels"". ZDNET. Retrieved 2023-01-09.
  7. ^ Kovar, Joseph F. (2021-07-20). "Virtuozzo Acquires OnApp, Targets Full IaaS, PaaS For Cloud Solution Providers". CRN. Retrieved 2023-01-09.
  8. ^ "Russian and Ukrainian roots, US exit: Jelastic acquired by Virtuozzo |". Ukraine Digital News. 2021-10-11. Retrieved 2023-01-09.
  9. ^ "Virtuozzo Has Acquired Onapp, Enabling More Comprehensive Intuitive Cloud Infrastructure Solutions For Service Providers". Retrieved 2022-09-16.
  10. ^ "OnApp became part of Virtuozzo in August 2021". Retrieved 2022-09-17.
  11. ^ "Virtuozzo Acquires Jelastic Business to Offer First Full-Stack Cloud Management Solution for Service Providers". Retrieved 2022-09-16.
  12. ^ "Jelastic PaaS is Acquired by Virtuozzo". Retrieved 2022-09-17.