ONLYOFFICE by Ascensio System SIA is an Open Source project with a focus on advanced and secure document processing. It offers a powerful office suite that comprises online editors for text documents, spreadsheets, and presentations highly compatible with MS Office, OpenDocument, and other popular file formats. With over 7 million users worldwide, ONLYOFFICE is a proven innovator in the online office business. Built with cutting-edge technology, it provides users with a vast range of editing tools and collaborative features ensuring smooth collaborative workflows and professional editing with complex formatting and objects. The ONLYOFFICE suite allows integrating the editors with your favorite cloud storage, including Nextcloud, ownCloud, Seafile and other platforms. As supplements in their daily work, users can work from mobile and desktop applications provided by ONLYOFFICE. More info on the official website.