Open365 is described as «The open source cloud with LibreOffice online — LibreOffice online + Seafile + KDE. Improve your productivity and communicate better with your team members. The world is moving forward. Welcome to the open source cloud!» and is a Office Suite in the office & productivity category. There are more than 25 alternatives to Open365 for a variety of platforms, including Windows, iPhone, iPad, Android and Android Tablet. The best alternative is LibreOffice, which is both free and Open Source. Other great apps like Open365 are ONLYOFFICE, Microsoft Office Suite, CryptPad and Apache OpenOffice.Open365 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 Open365.