Open-Source GraphQL Federation for Platform Teams
Federation grows more complex as enterprise graphs expand across teams and services.
Cosmo gives visibility, control, and open-source ownership for confident growth.
No lock-in. No surprises.
How Cosmo Powers Federation at Scale
Cosmo Streams
Traditional GraphQL subscriptions don't scale. Each service must stay connected and coordinated, consuming resources and slowing down the process.
—
Streams connects your federated graph to event streams like Kafka, NATS, or Redis. The router listens for events and updates subscriptions automatically, keeping backends stateless, efficient, and easy to operate at scale.
Cosmo Connect
Federation often stalls because every backend team has to learn GraphQL and rebuild its services to fit it.
—
Cosmo Connect lets teams keep their existing backends and languages. It maps GraphQL schema fields to backend gRPC services, so the router handles the translation and delivers one unified API to the frontend.
MCP
Managing a federated graph means constant tool switching between CLIs, docs, and dashboards just to explore schemas or make small changes.
—
Cosmo MCP Server brings federation workflows into your IDE. It connects Cosmo to tools like Cursor, Windsurf, and VSCode, allowing you to explore schemas, propose changes, and validate configurations instantly. No CLI or context switching needed.
Built for every use case
Modern APIs are multi-protocol.
Cosmo unifies them.
Unify API Infrastructure Across GraphQL, REST, gRPC, and Kafka
Fragmented contracts slow teams down. Cosmo unifies routing, schemas, and observability into one shared model.
Open source. Language-agnostic.
Ready for monoliths, microservices, and federated graphs.
Federation v1 and v2 compatible
Works with all existing GraphQL services. Any framework, any language.
High-Performance Router
Built in Go with native support for auth, subscriptions, and observability.
Maximized compliance
Deploy fully on-prem or use a hybrid model with a managed control plane and self-hosted routers to meet strict compliance needs.
Powerful CLI
Docs and schemas searchable by agents like Cursor, right from your terminal.
Federation-enforced LLMOps for safer, lower-cost AI
AI isn't a novelty, it's a powerful ally for developers and teams to build smarter, faster and with purpose.
We infuse our open-source GraphQL Federation platform with AI-driven workflows and tools to amplify productivity, enforce rigorous security and compliance standards, and enable collaboration at scale.
Teams like Luxury Presence are already using WunderGraph Cosmo to unify their architecture and accelerate delivery with AI-driven workflows. Read their case study to see how they transformed their development process.
What our customers have to say
Feature Flags
Shipping schema changes shouldn't break production.
Feature flags let you publish alternate subgraphs that temporarily replace existing ones, route select traffic through preview versions, and compare performance across releases.
Test safely in production without affecting real users, and roll out gradually. Validate changes with real traffic, and ship updates with confidence. See how Acoustic solved this.
Monolith to Federation
On The Beach cut latency by tens of milliseconds and scaled to higher traffic with fewer resources after migrating from a monolithic GraphQL API to WunderGraph Cosmo.
Federation and schema management became faster, more reliable, and easier for teams to own, improving developer velocity and reducing infrastructure costs.
Read the full story in the On The Beach case study.
Enterprise grade tooling at your disposal
8x
better P99 latency and more requests per second than Apollo Router
Deliver raw performance with the Cosmo Router
Native High-Performance Query Execution Planner written in Go.
Dataloader 3.0, enabling ahead of time batch optimizations through its breadth-first execution strategy.
AST-JSON based result merging for maximum performance and minimal memory of the Resolver.
Single-Flight for Query Execution Planning and data-fetching to avoid duplicate work and reduce latency.
Cache Warmer to precompute and cache query plans to handle high throughput surges. See it in action at the Super Bowl.
P99 Latency
Lower is better
Requests Per Second
Higher is better
Backed by eBay
eBay isn't just a customer, they believe so deeply in our vision that they invested in WunderGraph itself. Their partnership reflects the confidence of teams who've solved problems at massive scale and see WunderGraph as the next evolution in API infrastructure.
Our investment in WunderGraph's highly performant open-source platform will help boost eBay's API ecosystem and enable our teams to work faster and smarter in building products that help our sellers thrive.
Bryan Woodruff, Vice President of Seller Experience Engineering
LAUNCH NOW
Get started for free in 3 minutes
The convencience of a fully managed service without vendor-lock. No credit card required to get started.
Start building nowWant to learn more?
Get in touch with our experts and we'll discuss your use case and how WunderGraph can help you.
Talk to Sales