WunderGraph
Enterprise-ready GraphQL Federation platform for teams scaling from first subgraph to thousands of daily operations with governance, schema registry, and no lock-in.
WunderGraph is an open-source alternative to:

Open-Source GraphQL Federation Platform
WunderGraph Cosmo is an enterprise-ready platform for teams scaling from their first subgraph to thousands of daily operations. It provides a complete solution for building and running supergraphs with governance, schema registry, and distributed tracing capabilities.
Key Features
- GraphQL Federation v1 & v2: Support for both legacy and modern GraphQL Federation standards
- Schema Registry: Centralized management of GraphQL schemas with versioning
- Subscriptions: Real-time data updates for federated GraphQL APIs
- EDFS (Event-Driven Subscriptions): Advanced event-driven subscription system
- Analytics & Tracing: Comprehensive metrics and distributed tracing (OpenTelemetry compatible)
- Breaking Change Detection: Automated detection of schema changes that could break clients
- Schema Composition: Automatic composition of subgraphs into a unified supergraph
- Governance & Ownership: Platform for managing API ownership and governance at scale
- Distributed Tracing: Full observability with OpenTelemetry integration
- No Vendor Lock-in: Open-source solution that prevents dependency on proprietary platforms
Tech / Self-Hosting
WunderGraph Cosmo is open-source and can be self-hosted. The platform is built with modern technologies including:
- Router: High-performance GraphQL router for federated queries
- Studio: Web-based interface for managing schemas and operations
- Connect: Integration layer for connecting to various data sources
- ConnectRPC: RPC-style integration for microservices
- MCP Gateway: Model Context Protocol gateway for AI integration
- Streams: Event streaming capabilities for real-time updates
The project is available on GitHub and provides comprehensive documentation for self-hosting and deployment options.