tl;dr: Cloud in a Bottle is an open-source personal cloud platform: an Ubuntu-based server that runs webapps as rootless hardened containers behind a unified dashboard, with single sign-on across apps and inter-app permissioned APIs (aiming to feel like a "cloud smartphone"). Built by Imbue as an alternative to Sandstorm, Nextcloud, Yunohost, and Coolify, it's self-hostable with zero telemetry, plus a paid managed option running the same code. The curated app catalog is currently small, so early adopters will need some technical chops.