OnlyOffice is an open-source office suite and document collaboration platform that supports real-time editing of documents, spreadsheets, and presentations, helping teams work together on Office-compatible files from any browser. Designed for SMB IT admins, remote teams, and developers integrating document features, OnlyOffice combines a docs editor with high MS Office fidelity, collaboration rooms, and self-hosted deployment options. The suite's developer-friendly editors can also be embedded into custom apps and platforms. OnlyOffice is a strong fit for productivity bloggers and SaaS reviewers who recommend self-hosted office software and Microsoft Office alternatives to privacy-aware teams.