Datomic vs FlureeDB
Datomic: Immutable Datalog database from Nubank where every fact is timestamped and queries run in the app process. FlureeDB: Immutable RDF graph database with time travel, git-style branching, SPARQL, JSON-LD and Cypher.
key differences
- Datomic is primarily a relational database; FlureeDB is RDF / triple store.
- Licensing: Datomic is open source (permissive) (Apache-2.0 (binaries only; source not published)); FlureeDB is source-available (Business Source License 1.1 (converts to Apache 2.0 after 4 years)).
- Only Datomic has change data capture.
- Only FlureeDB has vector search, geospatial, json, compression, role-based access.
- FlureeDB has a serverless option; Datomic does not.
choose datomic for
- +Financial and banking domain models needing auditability
- +Systems that must answer what was known at a given time
- +Complex domain graphs in Clojure services
best at · OLTP, Event sourcing, Ledger
choose flureedb for
- +Auditable knowledge graphs with full history
- +Data provenance and compliance records
- +Long-term memory for AI coding agents and assistants
- +Semantic data integration with RDF and JSON-LD
best at · Knowledge graph, Traversal, RAG
Datomic vs FlureeDB: FAQ
What is the difference between Datomic and FlureeDB?
Datomic: Immutable Datalog database from Nubank where every fact is timestamped and queries run in the app process. FlureeDB: Immutable RDF graph database with time travel, git-style branching, SPARQL, JSON-LD and Cypher. Datomic is primarily a relational database; FlureeDB is RDF / triple store. Licensing: Datomic is open source (permissive) (Apache-2.0 (binaries only; source not published)); FlureeDB is source-available (Business Source License 1.1 (converts to Apache 2.0 after 4 years)). Only Datomic has change data capture.
When should I choose Datomic over FlureeDB?
Choose Datomic for financial and banking domain models needing auditability; systems that must answer what was known at a given time; and complex domain graphs in Clojure services. Choose FlureeDB for auditable knowledge graphs with full history; data provenance and compliance records; and long-term memory for AI coding agents and assistants.
Is Datomic or FlureeDB more popular?
Datomic ranks #225 on the WhichDB Score (14.9/100) and FlureeDB ranks #388 (5.3/100). Popularity is not fit: check the requirements that matter for your project.
Are Datomic and FlureeDB open source?
Yes. Datomic is open source. License: Apache-2.0 (binaries only; source not published). Not in the OSI sense. FlureeDB is source-available: you can read the code, but the license restricts some uses, typically offering it as a competing managed service. License: Business Source License 1.1 (converts to Apache 2.0 after 4 years).