WunderGraph

WunderGraph develops Cosmo, an open-source GraphQL Federation platform. It includes a schema registry, a federation router, composition, breaking-change and client-traffic schema checks, and Cosmo Connect, which lets backend services be exposed through gRPC contracts. The MCP Gateway turns approved operations into tools for AI agents, and SDK generation produces typed clients and HTTP/JSON endpoints.

The customers are platform, engineering and API teams that run federated GraphQL APIs. Cosmo can be self-hosted, with a free Developer plan, a Launch plan listed at $499 per month, and Scale and Enterprise plans with custom pricing. The website publishes testimonials from companies including eBay, SoundCloud, NerdWallet and Luxury Presence.

WunderGraph's Series A announcement says it raised $7.5M led by Karma Ventures, with eBay Ventures as a strategic investor. The company's careers page describes it as fully remote with no office, while the website's structured data lists a registered address in Miami, Florida. Open roles include a Senior Product Designer and a Senior/Staff Golang Engineer for EMEA, a Senior Talent Partner, and a Vice President of Marketing for the United States.

Product: Cosmo: an open-source GraphQL Federation platform with schema registry, federation router, schema checks, gRPC connectors, streams and an MCP gateway for AI agents.