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ONLYOFFICE

ONLYOFFICE

Open Source & Free Software AlternativesOffice & Productivity SuitesCloud & Collaboration
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Open-source office editors for web, desktop, mobile, and self-hosted teams.

ONLYOFFICE is an open-source office suite for creating and collaborating on documents, spreadsheets, presentations, PDFs, and forms. It can be used through ONLYOFFICE DocSpace, connected to existing platforms such as Nextcloud or Moodle, embedded into custom apps, or installed as desktop and mobile editors.

Why it stands out

  • Combines browser-based collaboration with free native desktop and mobile editors.
  • Open-source under AGPL 3.0, with source repositories available on GitHub.
  • Strong emphasis on Microsoft Office format compatibility rather than a separate native-document workflow.
  • Can be used as a standalone collaboration space, integrated into existing platforms, or embedded under another product’s brand.
  • Supports private deployment models and local AI model connections for organizations with stricter data controls.

Good to know

  • The product family is broad, so choosing between Docs, DocSpace, Workspace, cloud, desktop, and self-hosted editions may take comparison.
  • Some deployment and enterprise scenarios appear to require paid plans even though free apps and community builds are available.
  • AI, video calling, chat, and external-platform integrations depend on configured models or third-party services.

Photos

Illustration for ONLYOFFICE