Postgres has a graph extension work in progress, that may interest you: https://age.incubator.apache.org/ https://age.incubator.apache.org/ "AGE is an acronym

Postgres has a graph extension work in progress, that may interest you: https://age.incubator.apache.org/ https://age.incubator.apache.org/ "AGE is an acronym for A Graph Extension... The goal of the project is to create single storage that can handle both relational and graph model data so that users can use standard ANSI SQL along with openCypher, the Graph query language."