Fern vs PostGraphile

Fern has no write-up on Specifiction yet; its figures are above.

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.