Choosing between GraphQL and REST is a fundamental architectural decision. Both approaches have clear strengths—understanding your specific requirements determines which fits better.
REST Excels at These Use Cases
REST works best with resources that map naturally to CRUD operations. When your data model is simple and hierarchical, REST endpoints are intuitive. Its stateless model and HTTP caching work globally without special configuration. For public APIs consumed by diverse clients, REST is often the safer choice.
GraphQL Shines in Complex Scenarios
GraphQL solves real problems when your data requirements are complex. If your iOS app needs different fields than your Android app, GraphQL lets each request exactly what it needs. It eliminates the over-fetching and under-fetching problems that plague REST APIs with varied clients.
Performance Differences Matter
GraphQL queries can be more efficient for consumers but introduce server complexity. Queries run dynamically against your schema, making server-side caching harder. REST endpoints cache at the HTTP level globally—CDNs can cache responses at edge locations worldwide.
Tooling and Developer Experience
REST APIs are easier to debug. You can test individual endpoints directly in a browser. GraphQL offers introspection—you can query the schema itself. GraphQL’s strongly-typed schema catches errors early and enables autocomplete in compatible editors.
Making the Decision
Start with REST if you need broad client compatibility, simple data requirements, or critical performance via HTTP caching. Choose GraphQL if you have complex nested data, multiple client types with different needs, or want to reduce over-fetching significantly. Many large applications use both—REST for simple operations, GraphQL for complex queries.