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Grafeo

An embeddable graph database supporting both property graph and RDF data models with in-memory or persistent storage. Features ACID transactions via MVCC, vector search with HNSW indexing, and a cost-based query optimizer.

Visit website GitHub 766 stars
Overall rank
#85
First released
January 2026
License
Apache-2.0
Built with
Rust

Details

Vendor
GrafeoDB
Type
Multiple
Category
Emerging
License
Apache-2.0
Language
Rust
Query Languages
GQLopenCypherSPARQLGremlinGraphQLSQL/PGQ
Protocols
BoltHTTP/RESTgRPCWebSocket
Sources 7 references

Protocols HTTP/REST, WebSocket, gRPC, Bolt

Core Grafeo is an embeddable library with no protocol of its own; the separate grafeo-server project adds HTTP/REST (7474, including a generic JSON /graphql and /sparql route that is not a spec-dedicated endpoint so isn't tagged separately), a JSON WebSocket API at /ws, real gRPC for the GWP wire protocol (7688), and Bolt v5.x for Cypher (7687) — pass_A's 3-source cap led it to drop WebSocket.

  • Provides REST API, embedded web UI, GQL Wire Protocol (gRPC), and Bolt v5.x wire protocol access to Grafeo's multi-language query engine.
    README.md · reviewed 2026-08-02
  • Connect to `ws://localhost:7474/ws` for interactive query execution over a persistent connection.
    README.md · reviewed 2026-08-02
  • The gwp and full builds include a gRPC-based binary wire protocol on port 7688, fully aligned with the GQL type system
    README.md · reviewed 2026-08-02
  • The bolt and full builds include a Bolt v5.x wire protocol on port 7687, compatible with Neo4j drivers.
    README.md · reviewed 2026-08-02

License Apache-2.0

SPDX identifier as classified by GitHub from the repository licence file.

Released 2026-01

Repo created 2026-01-26; CHANGELOG shows dated releases starting v0.1.2 (2026-01-29). Refines current value of '2026' to a month.

  • ## [0.1.2] - 2026-01-29 Python test suite, documentation pass. ### Added - Comprehensive Python test suite covering LPG, RDF, all 5 query languages and plugins
    GrafeoDB/grafeo CHANGELOG.md · reviewed 2026-08-02

Language Rust

README states the engine is built in Rust; confirms current value.

  • Grafeo is a graph database built in Rust from the ground up for speed and low memory use.
    GrafeoDB/grafeo README.md · reviewed 2026-08-02