Practical comparison for real-world API development
Choose REST for most applications — it is simpler, faster to build, easier to cache, and every developer knows it. Choose GraphQL only when you have multiple frontend clients (web, iOS, Android, third-party) that need different data shapes from the same backend. If you have one frontend and one backend, GraphQL adds complexity without meaningful benefit.
| REST API | GraphQL | |
|---|---|---|
| Complexity | Simple (HTTP verbs + URLs) | Higher (schema, resolvers, types) |
| Over/Under-fetching | Common (fixed response shapes) | Solved (client specifies fields) |
| Caching | Easy (HTTP caching, CDN) | Complex (requires custom solutions) |
| File Uploads | Native (multipart/form-data) | Awkward (requires workarounds) |
| Real-time | WebSockets or SSE (separate) | Subscriptions (built-in) |
| Tooling | Mature (Postman, curl, Swagger) | Good (GraphiQL, Apollo DevTools) |
| Best For | Single-client apps, CRUD, microservices | Multi-client apps, complex data graphs |
Not inherently. GraphQL can reduce over-fetching (fewer network requests), but adds server-side complexity. For single-client applications, a well-designed REST API is equally fast and simpler to maintain.
Yes. Many companies use REST for simple CRUD operations and GraphQL for complex data queries. This hybrid approach gives you the best of both worlds.
REST is native to Rails (resources, controllers, serializers). GraphQL works via the graphql-ruby gem but requires more setup. For most Rails applications, REST is the natural and recommended choice.
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