OnlyOffice (formerly TeamLab) is an open-source office suite and collaborative software platform that provides editors for documents, spreadsheets, presentations, and PDFs. The software includes web-based, desktop, and mobile applications designed for document creation, editing, and collaborative work.
The project is primarily distributed under the GNU Affero General Public License (AGPL-3.0), with commercial licensing options available for enterprise and developer editions. The software is developed by Ascensio System SIA and its source code is publicly available on GitHub.
OnlyOffice has been adopted by French government organizations, and is available in 45 languages.
The project began in 2009 under the name TeamLab, developed as a platform for internal team collaboration that included social networking tools such as blogs, forums, wikis, and project management features.
In March 2012, TeamLab presented HTML5-based online document editors at CeBIT, a technology trade fair held in Hanover, Germany.
In July 2014, the project was renamed OnlyOffice. During the same year, the source code of the editors was published on GitHub and SourceForge under the AGPL-3.0 licence, making the software available as an open-source project.
In 2020, the product line was reorganised into several components, including OnlyOffice Docs, OnlyOffice Workspace, and OnlyOffice Groups. In 2021, support for the Web Application Open Platform Interface (WOPI) protocol was added to improve integration with external platforms.
In 2022, the project introduced OnlyOffice Forms, enabling users to create and fill interactive PDF forms.
In April 2023, the developers released OnlyOffice DocSpace, a collaboration environment organised around shared workspaces and document rooms.
In 2023 the company reorganised its corporate structure, establishing a holding company in Singapore while maintaining development and operational offices in multiple countries.
In March 2026, the developers of OnlyOffice publicly responded to Euro-Office's removal of certain licensing terms deemed to be "unenforceable and non-obligatory" additions to the GNU AGPL licence by calling it illegal.
The OnlyOffice ecosystem consists of several core applications and tools designed for document editing, collaboration, and workspace management. These include:
The editors support multiple document formats including:
Compatibility with formats used by Microsoft Office is a major focus of the software.
OnlyOffice is distributed under several licensing models:
Desktop and mobile editors are available for free use, while enterprise deployments may require commercial licensing.
OnlyOffice provides connectors and APIs that enable integration with third-party platforms. Supported integrations include file-sharing services, enterprise content management systems, and content management systems such as WordPress and Moodle. The software also supports the WOPI protocol, allowing interoperability with compatible platforms.
Artificial intelligence features were introduced to the platform in the early 2020s through an optional plugin architecture. The system allows users to connect external AI services or locally hosted models to assist with tasks such as text generation, summarisation, translation, and grammar correction. Later versions introduced contextual AI assistants within the editors and workspace-level automation tools within DocSpace. AI features are not enabled by default and require configuration by the user.
Based in Latvia, OnlyOffice owner Ascensio System SIA was a subsidiary of Russian-based New Communication Technologies (not to be confused with the company The New Cloud Technologies, which develops an unrelated office suite named MyOffice ()). Due to EU economic sanctions targeting Russia, European organizations that used the commercial version of OnlyOffice were prohibited from doing so.
In Russia, Ascensio sells a similar fork under the name R7-Office ().
In response to OnlyOffice's connection to Russia, a fork named Euro-Office is being developed.