PhotoPrism

PhotoPrism indexes an existing photo folder and layers search, face recognition, geotagged maps and automatic classification on top, without reorganizing your files. That read-your-folders approach makes it easy to try against a library you already have.

Indexing a large collection takes real time and CPU, and some convenience features sit behind a paid membership tier, though the core is open source and fully usable. There is no first-party mobile auto-upload; most people pair it with Syncthing or PhotoSync.

Best for people who want intelligence added to a folder-based archive they intend to keep as the source of truth.