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Open SaaS vs WunderGraph

Open SaaS is a starter kit for SaaS apps, whereas Cosmo is a GraphQL federation platform for any architecture.
Open SaaSAn open-source, 100% free, production-grade, React & Node.js SaaS starter!WunderGraphMaster API Compostition

Side by side

What it is
Open SaaS:Open SaaS is a free, open-source full-stack React + Node.js starter kit with built-in auth, payments and AI-ready features.
WunderGraph:WunderGraph Cosmo is a platform for building, managing and scaling federated GraphQL APIs.
Best for
Open SaaS:Full-stack SaaS starter with built-in payments
WunderGraph:Federated GraphQL governance and scaling
Who it’s for
Open SaaS:Developers building SaaS products who want a ready-made, type-safe stack.
WunderGraph:Teams that need to compose, govern and host GraphQL federations at any scale.
Pricing
Open SaaS:Freemium
WunderGraph:Freemium
Plans
Open SaaS:Hobby $9.99/month per month · Pro $19.99/month per month · 10 Credits $9.99
WunderGraph:Launch $499 per month · Scale $3499 per month
Open source
Open SaaS:Yes, 16,015 GitHub stars
WunderGraph:—
Works with
Open SaaS:React, Node.js, Prisma, Stripe, Polar.sh, Lemon Squeezy, Plausible, Google Analytics
WunderGraph:gRPC, Kafka, NATS, Redis, Apollo Federation v1, Apollo Federation v2, Prometheus, OpenTelemetry
DevHunt upvotes
Open SaaS:98
WunderGraph:38
Launched on DevHunt
Open SaaS:Jan 2024
WunderGraph:Jan 2023

Open SaaS features

  • Full-stack Type Safety. TypeScript types are auto-generated across the entire stack without extra configuration.
  • Pre-configured Auth. Ready-to-use authentication flow that you own and can customize.
  • Payment Provider Integration. Stripe, Polar.sh and Lemon Squeezy checkout and webhook setup out of the box.
  • Admin Dashboard & Analytics. Built-in dashboard with graphs, tables and Plausible/Google Analytics support.
  • File Uploads via AWS S3. Example code for presigned S3 uploads, fully documented.
  • Built-in Blog with Astro. Markdown-based blog powered by Astro, with SEO-friendly rendering.
  • E2E Tests & CI. Playwright tests and GitHub Actions CI pipeline included.
  • Deploy Anywhere. No vendor lock-in; deploy yourself or use Wasp’s one-click deploy.
Open SaaS on DevHunt →Alternatives

WunderGraph features

  • Connect any service. Expose gRPC, Kafka, NATS or Redis services through a unified GraphQL router without extra infrastructure.
  • Real-time streams. Router handles subscriptions, aggregating events from Kafka, NATS or Redis and pushes updates to clients.
  • MCP Gateway. One gateway turns approved operations into agent-ready tools with built-in authentication, eliminating separate MCP servers.
  • Graph governance hub. Shared canvas for schema design, review, ownership, proposals and safe deployments with audit logs and RBAC.
  • Cache warming. Pre-warm query planning cache to eliminate long planning delays for high-load scenarios.
WunderGraph on DevHunt →Alternatives

Based on each tool's website and DevHunt data. Details may change; check the official sites.