I said suitable for newcomers aka people touching RDF for the first time. If you want production-ready, you probably want Stardog, Ontotext GraphDB, or AWS Nept

I said suitable for newcomers aka people touching RDF for the first time. If you want production-ready, you probably want Stardog, Ontotext GraphDB, or AWS Neptune - neither is cheap. https://github.com/the-qa-company/qEndpoint https://github.com/the-qa-company/qEndpoint is also an interesting project that's used in production.