Nextcloud, the next generation open source Enterprise File Sync and Share was started by ownCloud inventor Frank Karlitschek and a dozen experienced engineers to empower users to take back control over their data and communication. The company was launched as a spin-off from Struktur AG, a leading web conferencing and financial planning software company since 1995, servicing customers like Deutsche Bank, Vodafone, BNP Paribas and many others. Nextcloud gives organizations fine-grained control over data access, facilitates file synchronization and sharing across devices, enables collaboration within and across organizational boundaries and lets users communicate through secure audio and video conferencing.
https://nextcloud.com/