ONLYOFFICE Docs

ONLYOFFICE Docs is a self-hosted office suite that runs in the browser and handles documents, spreadsheets, presentations, fillable forms, and PDFs. It operates as a document server you deploy via Docker, then connect to your existing file storage or collaboration platform through one of 40+ ready-made integrations. The Nextcloud pairing is the most common setup in the self-hosted community: Nextcloud manages your files, ONLYOFFICE handles the editing, and users see no seam between the two.

Files open and save in .docx, .xlsx, and .pptx without conversion friction, which matters when your team shares documents with people outside your server. Real-time co-editing works at both character and paragraph level, with track changes, comments, version history, and built-in chat included.

The free Community Edition supports up to 20 simultaneous connections and is enough for most small teams. Larger deployments require the paid Enterprise Edition, priced per connection. ONLYOFFICE also offers DocSpace (room-based collaboration) and Workspace (a full platform with email, CRM, and project management), but self-hosters typically only need and deploy Docs.

Worth noting: the marketing website conflates all three products, which makes first impressions confusing. Focus on ONLYOFFICE Docs when evaluating for self-hosting. The codebase is AGPL-3.0 licensed and actively maintained. Ascensio System SIA, the Latvian company behind it, counts UNESCO, Fujitsu, and Oracle among its paying customers, which suggests the product has staying power beyond hobby-tier support.