For over a decade, REST has been the standard for building web APIs. However, GraphQL—released by Facebook in 2015—has emerged as a powerful alternative that addresses some of REST's inherent limitations.
The REST Paradigm
REST (Representational State Transfer) is resource-based. You have fixed endpoints like /users or /products. While simple and well-understood, it often leads to two problems: Over-fetching (getting more data than you need) and Under-fetching (making multiple requests to get related data).
The GraphQL Revolution
GraphQL is query-based. Instead of multiple endpoints, you have a single entry point. The client specifies exactly what data it needs, and the server returns exactly that. This eliminates over-fetching and allows for retrieving deeply nested data in a single round trip.
When to Choose REST
- Simple applications with straightforward data requirements.
- When you need robust HTTP caching (REST leverages standard browser/CDN caching).
- Public APIs where you want to limit complexity for consumers.
When to Choose GraphQL
- Complex applications with many interrelated entities.
- Mobile apps where minimizing payload size and network requests is critical.
- When your frontend team needs high velocity and doesn't want to wait for backend changes.