REST API vs GraphQL
Understanding the differences between REST API and GraphQL for API development.
REST API vs. GraphQL: Choosing the Right API Style
REST (Representational State Transfer) and GraphQL are the two dominant approaches for designing the API that connects a frontend to a backend (or one service to another). Both solve the same fundamental problem — letting a client request and modify data — but they approach it quite differently, with real consequences for performance, flexibility, and development speed.
How REST Works
REST organizes an API around resources, each with its own URL — /users/123,/orders/456 — and standard HTTP methods (GET, POST, PUT, DELETE) to act on them. It's simple, widely understood, and works well with HTTP caching out of the box. The downside: a client often has to make several requests to assemble all the data a screen needs, or a single endpoint returns far more data than that screen actually uses (commonly called over-fetching).
How GraphQL Works
GraphQL exposes a single endpoint and lets the client specify exactly which fields it needs, across potentially multiple related resources, in one request. A mobile app showing a simplified user profile can request just the name and avatar; a desktop dashboard can request the same user's full order history in the same query shape — no separate endpoints required for each variation.
Key Differences at a Glance
REST vs. GraphQL
- Data fetching — REST often needs multiple requests; GraphQL fetches exactly what's needed in one request
- Caching — REST benefits from simple HTTP caching by URL; GraphQL caching requires more deliberate setup
- Learning curve — REST is simpler to start with; GraphQL has more upfront setup (schema, resolvers)
- Versioning — REST often versions endpoints (/v1, /v2); GraphQL schemas evolve more gradually via deprecation
- Best fit — REST suits simple CRUD APIs and public APIs with broad client compatibility; GraphQL shines when clients have very different, evolving data needs (e.g., web and mobile apps sharing one backend)
Making the Right Choice
Neither approach is universally "better" — REST remains an excellent default for most applications, especially simpler ones and public-facing APIs where broad compatibility and caching matter. GraphQL earns its added complexity when an application has multiple client types with significantly different data needs, or when reducing the number of round trips meaningfully improves performance. RecGenz evaluates this per project rather than defaulting to either option automatically.
