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Onlyoffice Logo
Developer(s)Ascensio System SIA
Stable release
6.4.2[1] / 19 October 2021; 39 days ago (2021-10-19)[2]
Written inHTML, JavaScript, C++
Operating system
Available in25 languages
TypeOffice Suite, Project management, Collaboration, CRM, Document Management

OnlyOffice (formerly TeamLab), stylized as ONLYOFFICE, is a free software office suite developed by Ascensio System SIA, a company headquartered in Riga, Latvia. It features online document editors, platform for document management, corporate communication, mail and project management tools.

OnlyOffice is delivered either as SaaS or as an installation for deployment on a private network. Access to the system is provided through a private online portal.

As of September 2021, ONLYOFFICE does not support RTL Languages (such as Hebrew and Arabic), and there's no plan to support RTL in the near future.[3]


The interface of OnlyOffice is divided into several modules: Documents, CRM, Projects, Mail, Community, Calendar and Talk. They are combined in a bundle called OnlyOffice Groups which is a part of OnlyOffice Workspace together with OnlyOffice Docs

The Documents module is a document management and sharing system for OnlyOffice files. The integrated audio and video player allows playing media from files stored in OnlyOffice.[4][non-primary source needed]

The Projects module is developed for managing project stages: planning, team management and task delegation, monitoring and reporting. This module also includes Gantt charts for illustrating the projects stages and dependencies between tasks.

The CRM module allows maintaining client databases, transactions and potential sales, tasks, client relationship history. This module also provides online billing and sales reports.

The Mail module combines a mail server for creating own-domain mailboxes and mail aggregator for centralized management of multiple mailboxes.

The Calendar module allows planning and monitoring of personal and corporate events, task deadlines in Projects and CRM, sending and receiving invitations to events.

The Community module offers corporate social network features: polls, corporate blog and forums, news, orders and announcements, and a messenger.


It is technologically based on three components: Document Server, Community Server and Mail Server.

The Document server maintains text document, spreadsheet and presentation editors and is written in JavaScript using HTML5 Canvas element.

The Community server hosts all functional modules of OnlyOffice. It is written in ASP.NET for Windows and in Mono for Linux and distributions.

The Mail server represents set of components that allows creating corporate mailbox using default or custom domain names. Mail Server is based on the iRedMail package which consists of Postfix, Dovecot, SpamAssassin, ClamAV, OpenDKIM, Fail2ban.

Online editors[edit]

OnlyOffice includes an online editing suite called OnlyOffice Docs. It combines text, spreadsheet and presentation editors that include features similar to Microsoft desktop editors (Word, Excel and PowerPoint). Since version 5.0 of the editors the interface has been renewed with a tabbed toolbar.[5] Editors allow co-editing,[6] commenting and chatting in real time[7] and provide such functions as Revision History and Mail Merge.

The beta version of OnlyOffice Docs predecessor, Teamlab Document Editor, was introduced at CeBIT 2012 in Hannover. The product was built using Canvas, a part of HTML5 that allows dynamic, scriptable rendering of 2D shapes and bitmap images.[8]

The basic type of formats used in OnlyOffice Docs is OOXML (DOCX, XLSX, PPTX). Other types of supported formats (ODT, DOC, RTF, EPUB, MHT, HTML, HTM, ODS, XLS, CSV, ODP, PPT, DOTX, XLTX, POTX, OTT, OTS, OTP, and PDF-A) are processed with inner conversion to DOCX, XLSX or PPTX.

Functionality of the suite can be extended using plugins (side applications). Users can choose from the existing list of plugins or create their own applications using the provided API. There is a connector to integrate the online editing suite with ownCloud.[9]

Desktop editors[edit]

OnlyOffice Desktop is an offline version of OnlyOffice editing suite.[10] The desktop application supports collaborative editing features when connected to the portal,[11] Nextcloud or ownCloud.[12] It is offered free of charge for both personal and commercial usage.

The desktop editors are cross-platform available for Windows 10, 8.1, 8, 7, Vista, and XP (x32 and x64), Debian, Ubuntu and other Linux distributions based on RPM, Mac OS 10.10 and newer. Besides platform-specific versions there is also a portable option. OnlyOffice Desktop Editors are available for installation as a snap package and AppImage.

Editors are compatible with MS Office (OOXML) and OpenDocument (ODF) formats and support DOC, DOCX, ODT, RTF, TXT, PDF, HTML, EPUB, XPS, DjVu, XLS, XLSX, ODS, CSV, PPT, PPTX, ODP, DOTX, XLTX, POTX, OTT, OTS, OTP, and PDF-A.

Like the online editing suite, the basic toolset of OnlyOffice Desktop can be upgraded using side plugins.

The desktop editors are distributed under AGPL-3.0-only license for personal and commercial usage.

OnlyOffice editors are also available as mobile application for iOS and Android. The application is called ONLYOFFICE Documents.

In early 2019, OnlyOffice announced the launch of a developer preview of end-to-end encryption of documents (files themselves, online editing and collaboration) that involves blockchain technology and is included in the functionality of the desktop suite.[13]


  • In 2009, a group of software developers, headed by Lev Bannov, launched a project called TeamLab, a platform for internal team collaboration that encompassed several social computing features (e.g. blog, forum, wiki, bookmarks).[14]
  • In March 2012, TeamLab introduced the first HTML5-based document editors at CeBIT.[8]
  • In July 2014, Teamlab Office was officially rebranded to OnlyOffice and the source code of the product was published on SourceForge and GitHub on terms of AGPL-3.0-only.[15]
  • In March 2016, the developers of OnlyOffice released a desktop application – OnlyOffice Desktop Editors, which is positioned as an open source alternative to Microsoft Office.[11]
  • In February 2017, the app for integration with ownCloud/Nextcloud was launched.[16]
  • In February 2018, OnlyOffice Desktop Editors became available as a snap package.[17]
  • In January 2019, OnlyOffice announced the release of end-to-end encryption functionality.[13]
  • In August 2019, Document Builder is published on GitHub under AGPL-3.0-only licence.[18]
  • In November 2019, OnlyOffice enters AWS Marketplace.[19]
  • In January 2020, OnlyOffice launches App Directory.[20]
  • In September 2020, OnlyOffice rebrands its product portfolio, introducing OnlyOffice Workspace, OnlyOffice Docs, and OnlyOffice Groups. It also releases Groups (collaboration platform) under Apache license.[21]
  • In October 2020, OnlyOffice announces compliance with HIPAA.[22]

See also[edit]


  1. ^ "Download ONLYOFFICE products".
  2. ^ "Download free ONLYOFFICE document editors for your desktop and mobile devices". Archived from the original on 16 May 2021. Retrieved 15 May 2021.
  3. ^ "Issue on GitHub". Archived from the original on 6 September 2020. Retrieved 14 October 2019.
  4. ^ Ksenija (21 May 2019). "ONLYOFFICE 10.0 is available for server solutions | ONLYOFFICE Blog". Archived from the original on 12 July 2019. Retrieved 12 July 2019.
  5. ^ "ONLYOFFICE with brand new interface | ONLYOFFICE Blog". 25 September 2017. Archived from the original on 10 January 2018. Retrieved 10 January 2018.
  6. ^ O'Hear, Steve. "TeamLab, A Canvas-Based Document Editor, Wants To Send Microsoft Office 365 Back to the Drawing Board | TechCrunch". Archived from the original on 10 January 2018. Retrieved 21 June 2017.
  7. ^ "How to edit your documents collaboratively on Linux – Xmodulo". Xmodulo. 27 May 2015. Archived from the original on 30 June 2017. Retrieved 21 June 2017.
  8. ^ a b "W3C CEO calls HTML5 as transformative as early Web". IT World Canada. Archived from the original on 2 October 2018. Retrieved 21 June 2017.
  9. ^ "ONLYOFFICE connector | ownCloud marketplace". Archived from the original on 16 October 2020. Retrieved 15 October 2020.
  10. ^ "OnlyOffice: An Open Source Microsoft Office Contender Worth Your Time". MakeUseOf. Archived from the original on 19 June 2017. Retrieved 21 June 2017.
  11. ^ a b "How to use plugins (add-ons) in ONLYOFFICE Desktop Editors". Archived from the original on 16 November 2016. Retrieved 21 June 2017.
  12. ^ "ONLYOFFICE Desktop Editors for Christmas | ONLYOFFICE Blog". 21 December 2018. Archived from the original on 12 July 2019. Retrieved 12 July 2019.
  13. ^ a b Brett, Charles (29 April 2019). "ONLYOFFICE – document collaboration via blockchain and encryption -". Enterprise Times. Archived from the original on 12 July 2019. Retrieved 12 July 2019.
  14. ^ Aasmae, Kalev. "Microsoft Office, Google Docs beware: This open-source startup is after your users | ZDNet". ZDNet. Archived from the original on 2 July 2017. Retrieved 21 June 2017.
  15. ^ "ONLYOFFICE – Continuous Growth, Successive New Features". 31 August 2015. Archived from the original on 31 August 2017. Retrieved 21 June 2017.
  16. ^ "How to Integrate OnlyOffice with ownCloud". LinuxBabe.Com. 14 February 2017. Archived from the original on 1 December 2017. Retrieved 21 June 2017.
  17. ^ "OnlyOffice Desktop Editors Available to Install in Ubuntu as Snap | UbuntuHandbook". Archived from the original on 12 July 2019. Retrieved 12 July 2019.
  18. ^ "ONLYOFFICE DocBuilder is available on GitHub | ONLYOFFICE Blog". 15 August 2019. Archived from the original on 20 January 2021. Retrieved 25 May 2021.
  19. ^ "ONLYOFFICE on AWS Marketplace | ONLYOFFICE Blog". 5 November 2019. Archived from the original on 7 December 2020. Retrieved 25 May 2021.
  20. ^ "ONLYOFFICE launches App Directory | ONLYOFFICE Blog". 14 January 2020. Archived from the original on 25 May 2021. Retrieved 25 May 2021.
  21. ^ "ONLYOFFICE reorganized product portfolio: Docs, Groups and Workspace | ONLYOFFICE Blog". 15 October 2020. Archived from the original on 4 March 2021. Retrieved 25 May 2021.
  22. ^ "How ONLYOFFICE complies with HIPAA | ONLYOFFICE Blog". 15 October 2020. Archived from the original on 15 May 2021. Retrieved 25 May 2021.

External links[edit]

Media related to Onlyoffice at Wikimedia Commons