REST vs GraphQL: Choosing the Right API Design

No API style wins every time. REST is simple and cache-friendly; GraphQL is flexible and easy to overfeed. This post is how we talk through the choice with a team, without turning it into a religious debate.

REST

Strengths: HTTP semantics, CDN-friendly GETs, huge tooling support, easy mental model when resources map to URLs.

Tradeoffs: Mobile or web clients may need several round trips for one screen, or one fat endpoint that only one client wanted. You can fix that with bespoke endpoints, but then you maintain more surface area.

Good fit when your API is fairly stable, resources are clear, and caching by URL matters (public content, simple mobile apps).

GraphQL

Strengths: Clients ask for the fields they need; one request can walk related data; the schema documents what exists.

Tradeoffs: HTTP caching is harder because POST bodies vary. Resolvers need care to avoid N+1 queries and abuse. The team has to learn the stack.

Good fit when many clients need different shapes, dashboards pull lots of nested data, or you are tired of versioning twenty REST endpoints for the same domain.

Hybrid

Plenty of products expose REST for webhooks, uploads, and public endpoints, and GraphQL for the app shell. Starting with REST and adding GraphQL for one consumer is a sane path.

Closing

Pick the shape that matches your clients and your team’s skills. We design and implement both and can help you evolve without freezing the product.

---

Cogent Softwares, API and backend development.