The GraphQL versus REST debate has matured beyond tribal allegiances into a practical engineering decision. After shipping production applications with both approaches — and even hybrid architectures that use both — we have developed a decision framework based on three factors: client diversity, query complexity, and team expertise. The answer is never universally one or the other; it depends on the specific constraints of the project.
REST is our default choice when the API serves a single frontend (or a small number of known clients), the data model maps cleanly to CRUD operations, and the team is more experienced with REST patterns. The simplicity of REST — predictable URLs, standard HTTP methods, straightforward caching with ETags and Cache-Control headers — is a genuine advantage in these scenarios. Overengineering a GraphQL layer for an API that serves a single Next.js frontend adds complexity without proportional benefit. We have seen teams spend weeks building a GraphQL schema that a simple REST API with TypeScript types could have replaced in days.
GraphQL earns its complexity when you have multiple clients with different data needs (a web dashboard, a mobile app, and a third-party integration all hitting the same backend), when queries involve deeply nested relationships that would require multiple REST round-trips, or when the frontend team needs the flexibility to iterate on data requirements without waiting for backend changes. For a logistics platform we built with a web dashboard, driver mobile app, and merchant API, GraphQL reduced the number of API endpoints from 87 REST routes to a single GraphQL endpoint, and the frontend team stopped filing tickets for new endpoints entirely.
The hybrid approach is increasingly common and pragmatic. We use REST for simple CRUD operations, file uploads, and webhook endpoints where the request/response shape is fixed. We use GraphQL for complex read operations where clients need flexibility in selecting fields and traversing relationships. Both REST and GraphQL routes share the same underlying service layer and database models — the API layer is just a thin translation between the transport format and the business logic. This approach gives us the simplicity of REST where it fits and the power of GraphQL where it is needed, without the dogma of choosing one over the other.