Digger Solo

The vendor describes Spotter as a semantic search layer that sits on top of your local file collection, letting you query by concept rather than keyword. It handles PDFs, images, documents, and music files, and the docs describe a relationship visualization feature that maps how files connect semantically. Because processing stays on your machine, nothing is uploaded to a cloud service. The free tier caps at 500 files with no index updates, which means any new files you add after the initial scan fall outside the search until you upgrade. Teams managing thousands of research papers or archive folders hit that ceiling fast.