PostGraphile vs TypeSpec

PostGraphile creates GraphQL APIs backed primarily by PostgreSQL, for applications such as SaaS backends and internal business tools. Its core features include GraphQL queries and mutations, automatic CRUD mutations, filtering, ordering, plugins, and authentication using JWT or custom pgSettings. It also supports row-level security and role-based access control. PostGraphile V4 Core and Version 5 are open source under the MIT license. Version 5 is built on Grafast, a planning and execution engine intended to improve performance and maintainability. The project can be self-hosted, and its homepage offers an `npx pgl` command to start with a PostgreSQL connection string. PostGraphile Pro adds query-cost, pagination, and query-depth limits, as well as a facility for scaling through database read replicas. The Pro plugin is for V4 Core; Version 5 remains open source and under development. V4 Core costs nothing. Pro License Only costs $25 a month, with up to four production instances and 100 development instances; larger clusters require custom licensing.

TypeSpec is a language for defining API shapes and data models, then producing schemas, API specifications, code, and documentation. Its standard library supports OpenAPI 3.0, JSON Schema 2020-12, and Protobuf. OpenAPI output can feed tools for API gateways, code generation, and validation; JSON Schema output can be used to validate data built from shared models. The HTTP library’s `@useAuth` decorator lets authors attach documented security schemes—including HTTP authentication, API keys, OAuth2, and OpenID Connect—to services, interfaces, or operations. Editor support for Visual Studio Code and Visual Studio includes syntax help and completion; the VS Code extension adds diagnostics, formatting, quick fixes, refactoring, and documentation preview. Users can extend TypeSpec with emitters and decorators. The CLI is available through npm for Node.js or as an experimental standalone executable, and a browser playground is available. TypeSpec is open source and free: free. Its emitter framework is experimental, and client emitters for JavaScript, Python, Java, and C# are in preview.