ONLYOFFICE – cloud online office suite

ONLYOFFICE (formerly known as Teamlab Office) is a multifunctional cloud online office suite integrated with CRM system, document and project management toolset, Gantt chart and email aggregator.

It allows you to organize business tasks and milestones, store and share your corporate or personal documents, use social networking tools such as blogs and forums, as well as communicate with your team members via corporate IM.

Manage documents, projects, team and customer relations in one place. OnlyOffice combines text, spreadsheet and presentation editors that include features similar to Microsoft desktop editors (Word, Excel and PowerPoint), but then allow to co-edit, comment and chat in real time.

OnlyOffice is written in ASP.NET, based on HTML5 Canvas element, and translated to 21 languages.

Features include:

  • As powerful as a desktop editor when working with large documents, paging and zooming.
  • Document sharing in view / edit modes.
  • Document embedding.
  • Spreadsheet and presentation editors.
  • Co-editing.
  • Commenting.
  • Integrated chat.
  • Mobile applications.
  • Gantt charts.
  • Time management.
  • Access right management.
  • Invoicing system.
  • Calendar.
  • Integration with file storage systems: Google Drive, Box, OneDrive, Dropbox, OwnCloud.
  • Integration with CRM, email aggregator and project management module.
  • Mail server.
  • Mail aggregator.
  • Edit documents, spreadsheets and presentations of the most popular formats: DOC, DOCX, ODT, RTF, TXT, XLS, XLSX, ODS, CSV, PPTX, PPT, ODP.

Support: GitHub
Developer: Ascensio System SIA
License: GNU GPL v3


OnlyOffice is written in C++ and JavaScript. Learn C++ with our recommended free books and free tutorials. Learn JavaScript with our recommended free books and free tutorials.

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