OnlyOffice (formerly TeamLab), stylized as ONLYOFFICE, is a free software office suite and ecosystem of collaborative applications developed by Ascensio System SIA, a subsidiary of "New Communication Technologies", a company from Russia, but headquartered in Riga, Latvia. In Russian market branded as P7-Office. 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. Online editors OnlyOffice includes an online editing suite called OnlyOffice Docs. It combines text, spreadsheet, presentation and form 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. Editors allow co-editing with two collaboration modes, real-time and paragraph-locking. Communication tools include commenting and chatting. The editors also provide such features as Revision History and Track Changes. 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. The basic type of formats used in OnlyOffice Docs is OOXML (DOCX, XLSX, PPTX) and own DOCXF and OFORM. Other types of supported formats (ODT, DOC, RTF, EPUB, MHT, HTML, HTM, ODS, XLS, CSV, ODP, PPT, DOTX, XLTX, POTX, OTT, OTS, OTP, XML, XPS, DjVu and PDF-A) are processed with inner conversion to DOCX, XLSX or PPTX if editing is possible. 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. OnlyOffice Docs also supports integration via WOPI. In 2022, together with the release of version 7.0 of OnlyOffice Docs, the project introduced OnlyOffice Forms, a new functionality of the document editor for creation and filling forms (document templates with fillable fields). It introduced two new formats, .OFORM and .DOCXF. The form editor also allows exporting templates as fillable PDFs. Сollaboration platform 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