ONLYOFFICE is a cloud-based and on-premise office suite suitable for small, midsize, and large companies. It offers project management, document management, CRM, community, mail, and time calendar features. The editors offer co-editing, chat, comments, mentions, reviewing, version history, and document comparison. The document management module provides document sharing and collaboration features. The Projects module includes project hierarchy management, progress tracking with Gantt charts, access rights management, and time management features. CRM allows users to manage contacts, deal with opportunities, and tasks.