Cayley vs TerminusDB

Cayley has no write-up on Specifiction yet; its figures are above.

TerminusDB is a free, open-source document graph database for JSON documents stored in a schema-enforced graph. It adds Git-like version control for data, including branching, diffing, merging, cloning, synchronization, and time travel. Commits are ACID transactions, and every write receives schema validation. Developers can use the HTTP document API, GraphQL, or WOQL, a Datalog-based query language. GraphQL works with Apollo, urql, Relay, and other clients; official libraries cover TypeScript/JavaScript and Python, with Rust documented. Role-based access control uses users, roles, capabilities, and resource scopes. Deployment documentation covers Docker, Linux or macOS source builds, and Kubernetes. DFRNT provides cloud hosting instances, while community support is available through Discord and GitHub. TerminusDB supports ontology modeling, semantic reasoning, graph visualization, and imports from CSV, JSON, JSON-LD, RDF/XML, and Turtle. It does not support RDF/SPARQL.