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FastAPI vs Hedystia
FastAPI provides Python-based type-hinted APIs but does not offer automatic TypeScript client generation.
FastAPIFast Python framework for building APIs with type hints.png?width=96)
HedystiaNext-gen TypeScript framework for building type-safe APIs at lightspeed.Which to pick
Pick FastAPI if you want…
- Fast, type-hinted Python APIs
- Python APIs with type hints
- Integrations with Starlette, Pydantic or uv (on FastAPI's list, not Hedystia's)
Pick Hedystia if you want…
- End-to-end type-safe API development
- Integrations with TypeScript, Bun or WebSockets (on Hedystia's list, not FastAPI's)
Side by side
- What it is
- FastAPI:FastAPI is a modern Python web framework for building high-performance APIs using standard type hints.
- Hedystia:Hedystia is a TypeScript framework that lets you build type-safe APIs with built-in validation, real-time subscriptions and automatic client generation.
- Best for
- FastAPI:Fast, type-hinted Python APIs
- Hedystia:End-to-end type-safe API development
- Who it’s for
- FastAPI:Python developers building APIs and microservices
- Hedystia:TypeScript developers building backend APIs who want end-to-end type safety.
- Pricing
- FastAPI:Open source
- Hedystia:Open source
- Open source
- FastAPI:Yes, 102,754 GitHub stars
- Hedystia:Yes, 25 GitHub stars
- Works with
- FastAPI:Starlette, Pydantic, uv, Uvicorn, Swagger UI, ReDoc
- Hedystia:TypeScript, Bun, WebSockets, @hedystia/client
FastAPI features
- High performance. Runs at speeds comparable to NodeJS and Go using Starlette and Pydantic.
- Fast development. Reduces code writing time by 200-300% with automatic validation and docs.
- Automatic docs. Generates interactive Swagger UI and ReDoc documentation from code.
- Data validation. Validates request data and converts JSON to Python types using Pydantic.
- Dependency injection. Provides an easy-to-use DI system for managing resources and services.
- Security support. Built-in OAuth2, JWT, and HTTP Basic authentication helpers.
Hedystia features
- Unified Inference. Server schemas are mirrored to the client, providing fully typed requests and responses.
- Built-in Validation. Route schemas act as runtime validators without external parsers.
- Real-Time First. WebSocket and SSE subscriptions are defined like HTTP endpoints with type safety.
- Auto Client Generation. @hedystia/client creates a fully typed HTTP client from server definitions.
- Bun Optimized. Runs natively on Bun for fast cold starts and minimal overhead.
- Auto Swagger Docs. Typing directly generates an OpenAPI spec via a plugin for interactive docs.
FastAPI vs Hedystia FAQ
Is FastAPI or Hedystia free?+
Yes, both are free and open source.
Is FastAPI or Hedystia open source?+
Yes, both are open source: FastAPI (fastapi/fastapi on GitHub, MIT license) and Hedystia (Hedystia/Hedystia on GitHub, MIT license).
Do FastAPI and Hedystia integrate with the same tools?+
Their integration lists don't overlap: FastAPI lists Starlette, Pydantic, uv, Uvicorn and 2 more; Hedystia lists TypeScript, Bun, WebSockets and @hedystia/client.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.