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Ariadne
Wrocław, Poland
What it is
Ariadne is an open-source Python library for building GraphQL APIs with a schema-first approach. Developers describe an API in GraphQL Schema Definition Language, then connect schema fields to application logic through resolver functions. The server supports asynchronous and synchronous query execution, with WSGI and ASGI apps for serving APIs. It is designed to interoperate with web frameworks, and the site includes a Django integration example. Ariadne Codegen generates a typed Python client and Pydantic models from a GraphQL schema and operations; generated client results are validated against those models at runtime. An optional SQLAlchemy 2.0 integration supports synchronous sessions under WSGI and ASGI. AsyncSession is limited to ASGI and has a documented limitation involving sibling root fields. Ariadne implements the GraphQL multipart request specification for uploads; its default Upload scalar is write-only and accepts values passed through variables. Security documentation discusses risks such as denial-of-service attacks and credential leakage, and provides mitigation guidance. Ariadne is self-hosted and listed as free.
For and against
For
- Supports synchronous and asynchronous query execution
- Provides WSGI and ASGI apps
- Generates typed Python clients and Pydantic models
- Optional SQLAlchemy 2.0 integration
Against
- Self-hosted deployment
- AsyncSession is ASGI-only
- Documented limitation for sibling root fields
The verdict
Ariadne offers server and client libraries for a schema-first GraphQL workflow in Python. Its deployment and database integration constraints are worth reviewing for a project’s architecture.
Who it suits
It suits Python developers building and serving GraphQL APIs who want schema-first development and optional typed client generation. Teams using SQLAlchemy should review the documented AsyncSession constraints.
Plans and prices
Ariadne
Open-source Python GraphQL server and client libraries
Read 8 Oct 2026 · ariadnegraphql.org
On the record
- Async and sync
- The server supports asynchronous query execution and also offers synchronous execution.ariadnegraphql.org · read 8 Oct 2026
- Client validation
- Generated client results are validated against generated Pydantic models at runtime.ariadnegraphql.org · read 8 Oct 2026
- File uploads
- Ariadne implements the GraphQL multipart request specification, and its default Upload scalar is write-only and supports values passed through variables.ariadnegraphql.org · read 8 Oct 2026
- Integrations
- The site describes interoperability with web frameworks and shows a Django integration example.ariadnegraphql.org · read 8 Oct 2026
- Maker
- The site credits Mirumee Software and Mirumee Labs; Mirumee's site gives its address as Wrocław, Poland and says it has championed open-source innovation for over 15 years.mirumee.com · read 8 Oct 2026
- Purpose
- Ariadne is a Python library for building GraphQL APIs with a schema-first approach.ariadnegraphql.org · read 8 Oct 2026
- Resolvers
- Ariadne connects schema fields to application business logic through resolver functions.ariadnegraphql.org · read 8 Oct 2026
- Security
- Ariadne's security documentation says GraphQL APIs can carry risks including denial-of-service attacks and credential leakage, and provides mitigation guidance.ariadnegraphql.org · read 8 Oct 2026
- Server interfaces
- Ariadne provides WSGI and ASGI apps for serving GraphQL APIs.ariadnegraphql.org · read 8 Oct 2026
- Server schema
- Developers define API schemas using GraphQL Schema Definition Language (SDL).ariadnegraphql.org · read 8 Oct 2026
- SQLAlchemy integration
- An optional SQLAlchemy 2.0 integration supports synchronous sessions under WSGI and ASGI, while AsyncSession is ASGI-only and has a documented limitation for sibling root fields.ariadnegraphql.org · read 8 Oct 2026
- Support
- The site lists a project email address for community contact: [email protected].ariadnegraphql.org · read 8 Oct 2026
- Typed client
- Ariadne Codegen generates a typed Python client and Pydantic models from a GraphQL schema and operations.ariadnegraphql.org · read 8 Oct 2026
