Metatype
Build backend components with WASM, Typescript and Python, no matter where and how your (legacy) systems are!
FreeCodeOpen SourceFramework58,830 impressions#1 of its week1 comment
Metatype is an open-source declarative platform to author and deploy APIs using TypeScript, Python, Rust and WASM.
- for
- Developers building backend services, APIs, and integrations across legacy systems.
- pricing
- open source
- license
- MPL-2.0
- v0.5.1-rc.6a year ago
- v0.5.1-rc.5a year ago
- v0.5.1-rc.4a year ago
Key features
- Typegraphs — Programmable virtual graphs that describe all stack components and enable type-safe API composition.
- Typegate — GraphQL/REST composition engine that compiles, optimizes, caches queries and enforces auth policies.
- Meta CLI — Live-reloading CLI for one-command deployment to Metatype cloud or self-hosted instances.
- Multi-language support — Write backend components in TypeScript, Python or Rust and run them via WebAssembly.
- Reusable components — Install third-party dependencies as reusable modules within typegraphs.
- Open-source & extensible — Hosted on GitHub with community contributions and a permissive MPL-2.0 license.
Use cases
- Expose legacy databases as GraphQL/REST endpoints without rewriting code
- Compose multiple micro-services into a single type-safe API layer
- Deploy serverless functions written in TypeScript, Python or Rust via WASM
- Create reusable business-logic components shared across projects
Metatype vs alternatives
 Metatype |  Fastgen |  BuildShip |  Sideko | |
|---|---|---|---|---|
| Best for | Declarative API development with type-safe graphs | Visual low-code backend builder | AI-assisted visual backend creation | API SDK generation |
| Pricing | Open source | Subscription | Free | Subscription |
| DevHunt upvotes | 37 | 95 | 118 | 81 |
| Launched | Jun 2024 | Jan 2023 | Jan 2023 | Jan 2024 |
- Metatype vs Fastgen: Fastgen focuses on visual backend building, while Metatype uses declarative typegraphs and code-first approach.
- Metatype vs BuildShip: BuildShip provides an AI-driven drag-and-drop backend builder, whereas Metatype is code-centric and open source.
- Metatype vs Sideko: Sideko generates SDKs and docs for existing APIs; Metatype creates the APIs themselves via typegraphs.
Metatype FAQ
What languages can I use to write components?+
Metatype currently supports TypeScript, Python and Rust, compiled to WebAssembly.
Is Metatype production ready?+
The engine is close to production readiness, though it is still in beta and minor versions may contain breaking changes.
How do I deploy my APIs?+
Use the Meta CLI for one-command deployment to Metatype Cloud or a self-hosted instance, with live reloading during development.
What is a typegraph?+
A typegraph is a programmable virtual graph that describes all components of your stack, enabling type-safe composition of APIs, storage and business logic.
Where can I contribute?+
Contributions are welcomed via GitHub; fork the repo, follow the contribution guide, and submit pull requests.
What license is Metatype released under?+
Metatype is released under the MPL-2.0 license.
Summarized by DevHunt from github.com · Sep 27, 2026. Details may change; check the official site.
