WunderGraph Cosmo
wundergraph.com
What it is
WunderGraph Cosmo is an open-source GraphQL Federation platform for platform teams, offering schema checks, guardrails and observability. It unifies GraphQL, REST, gRPC and Kafka in a federated graph and supports Apollo Federation versions 1 and 2 across existing GraphQL services. Cosmo Router is a Go-based, Apache 2.0-licensed router and gateway. Teams can deploy it with Docker, Kubernetes or an AWS Lambda-optimized binary, or use WunderGraph’s managed service. The Schema Registry checks composition, breaking changes, client traffic and linting. Subscriptions work over WebSockets and Server-Sent Events, and event-driven subscriptions can use Kafka, NATS, SQS or RabbitMQ. Cosmo Streams supports Kafka, NATS including JetStream, and Redis. Observability includes OpenTelemetry tracing and Prometheus metrics, which can be exported to compatible backends. The free Developer plan includes one federated graph, 10M requests/month, 10 subgraphs, one team member and seven-day retention. Launch costs $499 a month; Scale costs $3,499 a month. Enterprise pricing is custom. Managed plans include SOC 2 and HIPAA compliance; the site also identifies ISO 27001 certification.
Spec sheet
- Purpose
- Cosmo is an open-source GraphQL Federation platform for platform teams that provides schema checks, guardrails and observability.Read 1 Oct 2026 · wundergraph.com
- Audience
- Cosmo is positioned for teams scaling from their first subgraph to thousands of daily operations.Read 1 Oct 2026 · wundergraph.com
- Deployment
- The router can be self-hosted with Docker, Kubernetes or an AWS Lambda-optimized binary, or used through WunderGraph's managed service.Read 1 Oct 2026 · wundergraph.com
- Integrations
- Cosmo Streams currently supports Kafka, NATS including JetStream, and Redis.Read 1 Oct 2026 · wundergraph.com
- Support
- Support ranges from Discord community support on Developer to email, private Discord, Microsoft Teams and dedicated solution-architect support on Enterprise.Read 1 Oct 2026 · wundergraph.com
- Company founding
- WunderGraph was founded in 2020.Read 1 Oct 2026 · techcrunch.com
- Data privacy
- The router has default configurations designed so sensitive request information is not sent to the control plane or analytics.Read 1 Oct 2026 · wundergraph.com
- Federation compatibility
- Cosmo supports Apollo Federation versions 1 and 2 and works with existing GraphQL services across frameworks and languages.Read 1 Oct 2026 · wundergraph.com
- Observability
- Cosmo provides OpenTelemetry tracing and Prometheus metrics, with support for exporting telemetry to compatible monitoring backends.Read 1 Oct 2026 · wundergraph.com
- Protocols
- Cosmo unifies GraphQL, REST, gRPC and Kafka under a single federated graph.Read 1 Oct 2026 · wundergraph.com
- Router
- Cosmo Router is a Go-based, Apache 2.0-licensed GraphQL federation router and gateway.Read 1 Oct 2026 · wundergraph.com
- Schema governance
- The Schema Registry provides composition, breaking-change, client-traffic and linting checks.Read 1 Oct 2026 · wundergraph.com
- Security and compliance
- The managed plans include SOC 2 and HIPAA compliance, while the site also identifies ISO 27001 certification.Read 1 Oct 2026 · wundergraph.com
- Subscriptions
- Cosmo supports subscriptions over WebSockets and Server-Sent Events, plus event-driven subscriptions backed by Kafka, NATS, SQS or RabbitMQ.Read 1 Oct 2026 · wundergraph.com
Plans and prices
Developer Free Free forever 1 federated graph · 10M requests/month · 10 subgraphs · 1 team member · 7-day retention · community support Read 1 Oct 2026 · wundergraph.com
Launch $499 a month $499 / month 2 federated graphs · 250M requests/month · 20 subgraphs · 10 team members · 14-day retention · email support Read 1 Oct 2026 · wundergraph.com
Scale $3,499 a month $3499 / month 5 federated graphs · 1B requests/month · 100 subgraphs · 25 team members · 30-day retention · SSO/RBAC · 99% managed-service SLA Read 1 Oct 2026 · wundergraph.com
Enterprise Priced on request Custom Custom graphs, requests, retention and subgraphs · unlimited team size · SCIM · dedicated solution architect · up to 99.99% SLA Read 1 Oct 2026 · wundergraph.com
Strong points and limits
Strong points
- Supports Apollo Federation versions 1 and 2
- Self-hosted or managed router deployment options
- Schema Registry checks composition and breaking changes
- Offers OpenTelemetry tracing and Prometheus metrics
- Free plan includes 10M requests/month
Limits
- Free plan limited to one graph and 10 subgraphs
- Free plan has seven-day retention
- Launch costs $499 a month
- Enterprise pricing is custom
Who it suits
Cosmo is for platform teams scaling GraphQL federation, from an initial subgraph to thousands of daily operations. It offers both self-hosted deployment and a managed service.
Verdict
Cosmo combines federation, schema governance and observability, with several router deployment options. The free plan sets clear capacity and retention limits, while paid tiers start at $499 a month.
Where Specifiction places it
- GraphQL Tools#16 of 327.7
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