WunderGraph Cosmo provides the complete GraphQL Federation stack: a schema registry for managing subgraph schemas across teams, composition checks that validate compatibility before deployment, and a high-performance router written in Go that executes federated queries. The router supports both GraphQL Federation v1 and v2 specifications, query planning optimization, and real-time subscriptions — all critical for teams running federated architectures at scale.
The State of GraphQL Federation 2024 survey revealed a dramatic market shift: 87.23% of respondents now use WunderGraph Cosmo, up from 40.43% in 2023, while Apollo GraphOS usage dropped from 57% to 28% in the same period. This adoption surge reflects Cosmo's advantages: fully open-source (Apache 2.0) versus Apollo's restrictive licensing, better performance from the Go-based router versus Apollo's Node.js implementation, and a more developer-friendly schema management workflow.
Cosmo Cloud provides a managed dashboard with analytics, tracing, and schema change tracking for teams that prefer not to self-host. CI/CD integration validates schema compositions in pull requests, preventing breaking changes from reaching production. For teams building microservice architectures with GraphQL, Cosmo fills a critical gap — there is no other open-source GraphQL federation tool in most developer directories, despite it being essential infrastructure for federated API architectures.
