There's nothing else like its security model - YunoHost has a similar user-facing experience. (Better IMO).
I might have overstated the medical field- but they did pitch it as a product for enterprises with security requirements: "Sandstorm’s users included (and may still include – there’s no way for us to tell) companies, newspapers, educational institutions, research laboratories, and even government agencies. " (https://sandstorm.io/news/2024-01-14-move-to-sandstorm-org)
I might have overstated the medical field- but they did pitch it as a product for enterprises with security requirements: "Sandstorm’s users included (and may still include – there’s no way for us to tell) companies, newspapers, educational institutions, research laboratories, and even government agencies. " (https://sandstorm.io/news/2024-01-14-move-to-sandstorm-org)