Zhenni from Dgraph here. First of all, thank you for mentioning Dgraph in this topic. Second, not sure if you're aware, Dgraph recently released a beta for a hosted solution called Slash GraphQL. It solves the exact problem that you mentioned here. Slash is a fully managed GraphQL backend service and it gives you a /graphql endpoint in a single click. It is tailored for startups and small apps since it eliminates the backend management completely and allows you to focus on building your app and ship faster. What makes it unique is that Slash is powered by Dgraph, where you can enjoy the benefits of the graph backend (intuitive data modeling with only GraphQL schema) and Dgraph's speed and scalability.

Glad to hear that PostgreSQL satisfies your need. If you're looking to build a new project that requires complex query or relations, definitely give Slash a try. :)