WunderGraph API
UnclaimedOpen-source GraphQL Federation platform for building and managing unified APIs at scale.
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Tracked since2026
0 reviews trackedThe Bottom Line
Entry price
Free plan available, paid tiers above
Biggest pro
Significantly improves P99 latency and requests per second compared to alternatives like Apollo Router.
Biggest con
Requires understanding of GraphQL Federation concepts.
TL;DR - WunderGraph API
- Unifies GraphQL, REST, gRPC, and Kafka APIs into a single federated graph.
- Provides a high-performance router and Schema Registry for robust API management.
- Accelerates API development and ensures compliance with AI-driven workflows and observability.
Pricing: Free plan available
Best for: Growing teams
What is WunderGraph API?
WunderGraph Cosmo is an open-source API federation platform designed for platform engineering teams to manage and scale GraphQL APIs across various services and teams. It provides tools and infrastructure to unify fragmented API contracts (GraphQL, REST, gRPC, Kafka) into a single, observable model, enabling faster and safer API changes with built-in guardrails and observability. Cosmo aims to simplify the complexities of GraphQL federation, offering solutions for event-driven subscriptions, integrating existing backends without requiring GraphQL knowledge, and streamlining developer workflows.
The platform includes a high-performance Go-based router, a Schema Registry for version control and validation of API schemas, and tools like Cosmo Connect for integrating gRPC services into a federated graph. It supports both GraphQL Federation v1 and v2, is language-agnostic, and can be deployed on-premise or in a hybrid model for compliance. Cosmo also incorporates AI-driven workflows for enhanced productivity, security, and compliance, making it suitable for modern API infrastructures.
Available on: Web
Pros & Cons
Pros
- Significantly improves P99 latency and requests per second compared to alternatives like Apollo Router.
- Reduces infrastructure costs and development time for complex API features.
- Simplifies integration of diverse backend technologies (REST, gRPC, Kafka) into a unified GraphQL API.
- Offers robust security and compliance features including on-premise deployment options.
- Enhances developer experience with AI-driven workflows and IDE integration.
Cons
- Requires understanding of GraphQL Federation concepts.
- Migration from existing solutions like Apollo might require some re-configuration.
- The breadth of features might have a learning curve for new users.
Preview
Key Features
Open-Source GraphQL FederationHigh-Performance Go-based RouterCosmo Streams (Event-Driven Federated Subscriptions)Cosmo Connect (gRPC to GraphQL mapping)MCP Gateway (AI-ready API interface)Schema Registry with version control and checksFederation v1 and v2 compatibilityAdvanced Request Tracing (ART)
Pricing Plans
Pricing checked Jun 11, 2026
Developer
Free forever
Everything in all plans, plus:
- 1 Federated Graph
- Up to 10M Requests per month
- Discord Community Support
- Max Team Size: 1
- Data Retention: 7 days
- Traffic-based Breaking Change Detection: 7 days
- Max Subgraphs: 10
- Feature Flags: 1
Launch
$499 / month
Everything in all plans, plus:
- 2 Federated Graphs
- Up to 250M Requests per month
- Email Support
- Max Team Size: 10
- Data Retention: 14 days
- Traffic-based Breaking Change Detection: 14 days
- Max Subgraphs: 20
- Feature Flags: 1
Scale
$3499 / month
Everything in all plans, plus:
- 5 Federated Graphs
- Up to 1B Requests per month
- 30 days of Data Retention
- SSO, RBAC
- Standard SLA
- Slack Connect
- Max Team Size: 25
- Single Sign-On (SSO)
Enterprise
Custom
Everything in all plans, plus:
- Custom number of Federated Graphs
- Up to 99.99% uptime SLA
- Incident response SLA
- Customizable MSA
- Dedicated Cloud Environment available
- Dedicated Solution Architect & Priority Support
- Max Team Size: Unlimited
- Single Sign-On (SSO)
Included in all plans
- Self-Hosted Router
- Apollo Federation v1 support
- Apollo Federation v2 support
- JWT / JWKS Auth
- Federated Subscriptions (SSE, WebSockets)
- Prometheus Metrics
- OpenTelemetry (OTEL) Tracing
- Advanced Request Tracing (ART)
Reviews
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WunderGraph API FAQ
How does WunderGraph API help platform engineering teams?
WunderGraph API is designed for platform engineering teams to manage and scale GraphQL APIs across various services and teams. It unifies fragmented API contracts from different sources into a single, observable model, which helps in making faster and safer API changes.
Which teams benefit most from using WunderGraph API?
Platform engineering teams benefit most from WunderGraph API, as it provides tools and infrastructure to manage and scale GraphQL APIs. It is also suitable for developers looking to simplify the integration of diverse backend technologies into a unified GraphQL API.
How does WunderGraph API compare to Kong for API management?
WunderGraph API significantly improves P99 latency and requests per second compared to alternatives, offering a high-performance Go-based router. It focuses on unifying diverse backend technologies like REST, gRPC, and Kafka into a single GraphQL API, which simplifies complex API features.
What kind of learning curve should users expect with WunderGraph API?
Users should expect a learning curve due to the breadth of features and the requirement to understand GraphQL Federation concepts. Migration from existing solutions might also necessitate some re-configuration.
How is WunderGraph API priced?
WunderGraph API is available on a free tier, with paid plans offered for users requiring more usage and advanced features.
Can WunderGraph API integrate different backend technologies?
Yes, WunderGraph API simplifies the integration of diverse backend technologies such as REST, gRPC, and Kafka into a unified GraphQL API. It includes tools like Cosmo Connect specifically for integrating gRPC services into a federated graph.
Does WunderGraph API support both GraphQL Federation v1 and v2?
Yes, WunderGraph API supports both GraphQL Federation v1 and v2, making it versatile for different federation setups. It also includes a Schema Registry for version control and validation of API schemas.
Source: wundergraph.com