Nextcloud is an open-source software platform that allows users to store and share their work and personal files securely. It provides a range of features such as online collaboration, calendar syncing, document editing, and more. Nextcloud values user privacy and transparency, offering end-to-end encryption, secure file sharing, and data ownership. It can be self-hosted or accessed through a hosting provider, and is compatible with a wide range of devices and operating systems. Nextcloud has gained popularity among businesses and individuals alike, for its productivity boosting features and security measures.