There was a recent VLDB paper[1] demonstrating that the extension DuckPGQ[2] for DuckDB (an embedded database) offers competitive graph query performance compared to Neo4j and Umbra. No data on how it compares to KuzuDB.

[1] https://vldb.org/cidrdb/papers/2023/p66-wolde.pdf [2] https://duckpgq.org/