IBM (IBM) is the primary public play, since Red Hat's Linux packaging and container strategy underpin Flatpak and IBM now owns Red Hat. Indirect exposure comes from the broader Linux/open-source and hybrid-cloud ecosystem that relies on secure, cross-distribution app delivery. Entrepreneurially, you could build Flatpak-focused tooling, a curated enterprise app store, or a packaging service that streamlines creation, signing, and deployment of Flatpak apps.