REST vs GraphQL: which API style should you build?
REST organises an API around resources at URLs, such as /orders/42, using HTTP methods and status codes. GraphQL exposes a typed schema through a single endpoint and lets clients describe exactly which fields they want in one query. Both are mature and well supported; they make different trade-offs between simplicity and flexibility.
The short answer
REST is the right default for most APIs: it is simple, works with standard HTTP caching and is understood by every developer and integration partner. GraphQL pays off when several clients need different shapes of the same data, or when screens combine many related resources and REST would require numerous requests. It adds schema and server work that small APIs rarely need.
REST vs GraphQL at a glance
| Criterion | REST | GraphQL |
|---|---|---|
| Structure | Many endpoints, one per resource | One endpoint with a typed schema |
| Data fetching | Fixed responses; can over- or under-fetch | Client chooses exactly the fields it needs |
| HTTP caching | Works naturally with CDNs and browsers | Needs persisted queries or client caching |
| Type safety | Via OpenAPI specs and generated clients | Built into the schema; strong code generation |
| Versioning | Often versioned URLs or headers | Evolve schema by adding and deprecating fields |
| Errors | HTTP status codes | Errors array, often with HTTP 200 |
| Server complexity | Lower | Higher: resolvers, batching, query limits |
| Public APIs | Familiar to almost every integrator | Powerful, but less familiar to some partners |
Choose REST when
- You are building a public or partner API that many teams will consume
- Responses can be cached at the CDN or browser level
- The API is small or maps cleanly to resources
- You handle file uploads, webhooks or simple CRUD operations
- The team wants the simplest thing to build, monitor and debug
Choose GraphQL when
- Web, mobile and partner clients each need different data from the same backend
- Screens combine many related entities that would take several REST calls
- Frontend teams want to change data needs without backend releases
- You are unifying several services behind one API gateway
Fetching and performance
GraphQL's main advantage is that a client gets exactly what a screen needs in one request, which helps mobile apps on slow connections. The cost moves to the server: naive resolvers can trigger many database queries, so batching with tools such as DataLoader, plus query depth and complexity limits, are needed to keep it fast and safe.
REST responses are fixed, but well-designed endpoints with filtering and includes cover most needs. Because each URL is a cacheable resource, REST benefits from CDN and browser caching with almost no extra work.
Type safety without GraphQL
Strong typing used to be a key reason to choose GraphQL. REST APIs described with OpenAPI can now generate typed clients too, and in full stack TypeScript projects tools such as tRPC or Next.js server actions provide end-to-end types without either approach. That narrows the cases where GraphQL is clearly needed.
Frequently asked questions
Is GraphQL replacing REST?
No. Both are widely used. GraphQL is popular for complex client-facing APIs, while REST remains the standard for public APIs, webhooks and most integrations.
Can I use both in one product?
Yes. A common pattern is GraphQL for your own web and mobile apps and REST for webhooks, file uploads and partner integrations.
Is GraphQL less secure?
Not inherently, but its flexibility adds risks such as very expensive queries. Depth limits, complexity limits, authorisation in resolvers and persisted queries address them.
Still deciding?
Tell me about your product, users and constraints, and I will recommend the option that fits, even if it is not the one I use most.
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