ONLYOFFICE is described as «open-source online collaborative office combining editors for documents, spreadsheets, presentations, and forms. It is compatible with all popular formats and features maximum support for MS Office files» and is a very popular Office Suite in the office & productivity category. There are more than 25 alternatives to ONLYOFFICE for a variety of platforms, including Windows, Mac, Android, iPhone and Linux. The best alternative is LibreOffice, which is both free and Open Source. Other great apps like ONLYOFFICE are Microsoft Office Suite, CryptPad, Apache OpenOffice and WPS Office.ONLYOFFICE alternatives are mainly Office Suites but may also be Word Processors or Spreadsheet Apps. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of ONLYOFFICE.