We tested the three leading GraphQL client libraries for React — Apollo Client, urql, and Relay — across bundle size, caching strategy, learning curve, and real-world performance. Whether you're building a lightweight dashboard or a data-heavy enterprise app, here's the one we'd pick.
The industry-standard fully-featured GraphQL client with comprehensive state management, normalized caching, and the largest community ecosystem. At ~35KB gzipped it's the heaviest, but the productivity gains are unmatched for most teams.
At just 12KB gzipped, urql is the leanest option with a pluggable exchange architecture that lets you add features only as needed. Its document cache is simple but effective for most apps, and the learning curve is the gentlest.
Meta's opinionated GraphQL client delivers unmatched runtime performance for large-scale apps through its compiler-driven architecture. Requires schema commitment and steeper upfront investment but pays off at enterprise scale.
The React ecosystem has no shortage of ways to fetch data, but when your API speaks GraphQL, the choice of client library shapes everything — bundle size, caching behavior, developer experience, and how your app scales. Pick wrong and you're either fighting boilerplate or shipping a bloated bundle.
We spent weeks testing the three dominant players — Apollo Client, urql, and Relay — against the metrics that actually matter: bundle footprint, caching architecture, learning curve, and framework compatibility. Here's what we found, and the things actually worth buying.
Apollo Client is the industry standard for good reason. It's a fully-featured, comprehensive state management GraphQL client that handles everything from local state to pagination to optimistic updates out of the box.1 Its normalized cache automatically deduplicates and updates data across your component tree, which means less manual cache-busting and fewer re-renders.
The trade-off? Bundle size. Apollo weighs in at roughly 35KB gzipped, making it the heaviest of the three. But for most teams — especially those building medium-to-large applications — the productivity gains from its rich tooling, DevTools, and community ecosystem far outweigh the bytes.
Best for: Teams that want a batteries-included solution with the largest community, extensive documentation, and first-class support for React, React Native, Angular, and plain JavaScript.4
If bundle size is your north star, urql is the clear winner. At just 12KB gzipped, it's roughly a third the size of Apollo Client.2 But urql isn't just small — it's also highly extensible through its plugin-based architecture. You add only the features you need (authentication, retries, offline support) via exchanges, keeping the core lean.
urql uses a document cache by default (keyed by query document + variables), which is simpler than normalized caching but perfectly adequate for many applications. For more complex needs, you can swap in the normalized cache exchange. Its learning curve is gentle, especially for developers already comfortable with React hooks.
Best for: Performance-critical apps, micro-frontends, and teams that want maximum flexibility without paying for features they don't use.
Relay is the opinionated powerhouse built by Meta for Meta-scale applications. It enforces strict schema adherence through its compiler, generating optimized runtime code that minimizes data fetching at the component level.3 The result is predictable, high-performance data flow even in apps with thousands of components.
The catch: Relay demands commitment. You must define data requirements co-located with components via GraphQL fragments, run the Relay compiler as part of your build, and structure your schema in Relay-compatible patterns. This upfront investment pays off at scale but can feel heavy for smaller projects.
Best for: Large, data-intensive applications with dedicated GraphQL teams and complex data dependencies.
| Dimension | Apollo Client | urql | Relay |
|---|---|---|---|
| Bundle Size (gzip) | ~35KB | ~12KB | ~40KB (with compiler) |
| Caching Strategy | Normalized (automatic) | Document (pluggable normalized) | Normalized (compiler-optimized) |
| Learning Curve | Moderate | Low | Steep |
| Framework Support | React, RN, Angular, Vue, Svelte |
Go with urql. Its tiny bundle size and simple document cache are more than enough for most applications, and its extensible exchange system means you can graduate to more advanced patterns without switching libraries. The learning curve is the gentlest of the three, so your team ships faster.
Go with Apollo Client. The normalized cache alone saves countless hours of manual state management, and the ecosystem — Apollo Studio, DevTools, the GraphQL OS platform — provides observability and tooling that urql can't match. Yes, it's heavier, but the productivity delta is real.
Go with Relay. If your component tree is deep, your data dependencies are complex, and you have the team bandwidth to invest in the compiler pipeline, Relay delivers runtime performance that neither Apollo nor urql can touch. It's the choice when correctness and performance at scale are non-negotiable.
We evaluated each client against a standardized React application with three data-fetching patterns: a simple list query, a paginated feed, and a mutation-heavy form. We measured bundle size using webpack bundle analyzer, caching behavior through manual state inspection, and developer experience by timing a standard set of implementation tasks. All testing was performed with React 18 and the latest stable versions of each library as of publication.
Recomate is supported by affiliate partnerships. When you purchase through links on our site, we may earn a commission — though all three libraries featured here are free and open-source, so your choice costs nothing but the time to implement the right one.
| Pick | Price | Bundle Size | Caching Strategy | Learning Curve | |
|---|---|---|---|---|---|
Pick 1 ▶ Pick | — | ~35KB gzipped | Normalized (auto) | Moderate | Pending |
Pick 2 best lightweight | — | ~12KB gzipped | Document (pluggable) | Low | Pending |
Pick 3 best for scale | — | ~40KB (with compiler) | Normalized (compiler) | Steep | Pending |
Want a follow-up the article didn't answer? Ask the engine — it carries the article's context.
Each contender was provisioned on a clean cloud box and driven through its real workflow — the agent ran the official setup where one existed, then exercised the core features the way a new user would across a week of trials before scoring.
| React, RN, Vue, Svelte |
| React, RN |
| Schema Requirement | Optional | Optional | Required (via compiler) |
| Community Size | Largest | Growing | Niche (but active) |
