Apollo Client vs WunderGraph Cosmo

Apollo Client is a JavaScript library for managing GraphQL data in applications. It can fetch, cache and modify data from local and remote sources, then update the interface as data changes. Developers describe a query and receive its data without manually managing loading states. Normalized caching can make responses to cached queries almost immediate. The core @apollo/client library has built-in React integration, including hooks and Suspense, and the library can be added incrementally to JavaScript or TypeScript applications. It works with any build setup and GraphQL API. Community integrations extend support to frameworks including Angular, Vue, Svelte, Solid.js and Ember, as well as native iOS and Android. Apollo Client also supports GraphOS Router features such as incremental delivery, subscriptions and persisted-query safelisting. Chrome and Firefox extensions provide GraphiQL and tools for inspecting watched queries, mutations and cache. Apollo Client is free and open source. GraphOS Free includes one self-hosted router limited to 60 requests per minute; the separate Developer plan is $5 a month, billed monthly.

WunderGraph Cosmo is an open-source GraphQL Federation platform for platform teams, offering schema checks, guardrails and observability. It unifies GraphQL, REST, gRPC and Kafka in a federated graph and supports Apollo Federation versions 1 and 2 across existing GraphQL services. Cosmo Router is a Go-based, Apache 2.0-licensed router and gateway. Teams can deploy it with Docker, Kubernetes or an AWS Lambda-optimized binary, or use WunderGraph’s managed service. The Schema Registry checks composition, breaking changes, client traffic and linting. Subscriptions work over WebSockets and Server-Sent Events, and event-driven subscriptions can use Kafka, NATS, SQS or RabbitMQ. Cosmo Streams supports Kafka, NATS including JetStream, and Redis. Observability includes OpenTelemetry tracing and Prometheus metrics, which can be exported to compatible backends. The free Developer plan includes one federated graph, 10M requests/month, 10 subgraphs, one team member and seven-day retention. Launch costs $499 a month; Scale costs $3,499 a month. Enterprise pricing is custom. Managed plans include SOC 2 and HIPAA compliance; the site also identifies ISO 27001 certification.