Perkeep (previously Camlistore, Content-Addressable Multi-Layer Indexed Storage) is a set of open-source formats, protocols, and software for modeling, storing, searching, sharing, and synchronizing data.

[1] Perkeep's content-addressable storage is based on GPG-signed claims.

These claims provide modeling, storing, searching, sharing, and synchronization of data.

Perkeep is graph-based rather than a working tree in data model terminology.

[2][3][4] The project has two goals: expand the standard library of the Go programming language, and implementing Perkeep open source formats, protocols, and software for modeling, storing, searching, sharing of a long-term, personal datastore system.