ONLYOFFICE Document Server is an online office suite comprising viewers and editors for texts, spreadsheets and presentations. Developed by Ascensio System SIA
License: Open Source
ONLYOFFICE offers a self-hosted option and supports a wide range of document formats, making it ideal for users who prioritize privacy and customization. In contrast, Office Online provides seamless integration with Microsoft's suite and a user-friendly experience, making it more suitable for users already embedded in the Microsoft ecosystem.