REST and GraphQL are two approaches to building APIs. REST uses HTTP methods on resource URLs (GET /users/1). GraphQL uses a single endpoint with declarative queries (query { user(id: 1) { name } }). REST is simpler and more cacheable; GraphQL is more flexible and powerful. The choice depends on API complexity and client requirements.
REST vs GraphQL
Side-by-Side Comparison
| Aspect | REST | GraphQL |
|---|---|---|
| Query Flexibility | Fixed response from /users/1 endpoint. Over-fetching (get extra fields you don't need). Multiple requests for related data. | Client specifies exact fields needed. Zero over-fetching. Single query for related data. Very flexible. |
| Caching | HTTP caching works naturally. GET requests cached by CDNs and browsers. Cache headers control behavior. | Single POST endpoint defeats standard HTTP caching. Requires custom caching or Redis. Harder to cache. |
| Complexity | Simple to learn and implement. REST basics learnable in hours. Stateless, predictable. | Steep learning curve. Requires understanding schema, types, resolvers. 1-2 weeks to proficiency. |
| Monitoring & Debugging | HTTP logs and monitoring tools work naturally. Status codes indicate errors clearly. | All requests are POST to single endpoint. Requires custom logging. Status codes less meaningful. |
| N+1 Query Problem | Naturally leads to N+1 queries. Fetch users, then N separate calls for each user's posts. | Resolver-based, can be optimized with DataLoader. Typically better N+1 handling. |
| Real-time & Subscriptions | Not built-in. Requires WebSockets or polling. More manual setup for real-time. | Subscriptions are first-class. WebSocket support built-in. Real-time updates elegantly designed. |
| File Uploads | Standard multipart/form-data. Built-in browser support. Works naturally. | File uploads require special handling. graphql-multipart-request or apollo-server custom code. |
| Industry Usage | Still dominant. Every public API uses REST (Twitter, GitHub classic, Stripe, Razorpay). | Growing rapidly. GitHub v4 API is GraphQL. AWS AppSync uses GraphQL. Facebook, Shopify embrace it. |
When to Use Each
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Verdict
Verdict: Use REST for simple APIs and learning API design. Use GraphQL for complex applications with multiple clients or real-time needs. Many teams use both: REST for simple public endpoints, GraphQL for internal/complex APIs. Starting with REST is often wise; migrate to GraphQL if complexity warrants it.