Sovereignty & Resilience:

Software and Services from SerNet

SerNet produces the most important commercial open source alternative to Microsoft Windows: SAMBA+.
It serves both as Identy and Access Management solution (IAM) for Microsoft's Active Directory and as high performance SMB server with a wide range of cluster support options (Ceph, GlusterFS, Spectrum Scale and more).
more info at samba.plus 

SerNet also produces verinice, the leading open source GRC tool for many domains, eg ISO 27001, GDPR, NIS2, and a lot other standards and regulations in combination with support services and consulting.
SerNet supports open source for more than 25 years and has a long track record with OEM customers and end users from startups to Fortune 500 companies. 
more info at verinice.com