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Ariadne

ariadnegraphql.org

Free plan WebLinuxAPISelf-hosted
Visit ariadnegraphql.org
Spec score 8.1 #5 of 32 in GraphQL Tools

What it is

Ariadne is an open-source Python library for building GraphQL APIs with a schema-first design. Developers describe an API using GraphQL Schema Definition Language and connect schema fields to application logic with resolver functions. The server supports asynchronous and synchronous query execution and can be served through WSGI or ASGI apps. The project describes interoperability with web frameworks and includes a Django integration example. Ariadne Codegen creates 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 in WSGI and ASGI, while 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 supports values passed through variables. Security documentation discusses denial-of-service and credential-leakage risks and gives mitigation guidance. Ariadne is self-hosted and free, and the site lists Linux, web, and API platforms.

Spec sheet

Purpose
Ariadne is a Python library for building GraphQL APIs with a schema-first approach.Read 8 Oct 2026 · ariadnegraphql.org
Integrations
The site describes interoperability with web frameworks and shows a Django integration example.Read 8 Oct 2026 · ariadnegraphql.org
Security
Ariadne's security documentation says GraphQL APIs can carry risks including denial-of-service attacks and credential leakage, and provides mitigation guidance.Read 8 Oct 2026 · ariadnegraphql.org
Support
The site lists a project email address for community contact: [email protected].Read 8 Oct 2026 · ariadnegraphql.org
Headquarters
Wrocław, PolandRead 28 Sep 2026 · ariadnegraphql.org
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.Read 8 Oct 2026 · mirumee.com
Async and sync
The server supports asynchronous query execution and also offers synchronous execution.Read 8 Oct 2026 · ariadnegraphql.org
Client validation
Generated client results are validated against generated Pydantic models at runtime.Read 8 Oct 2026 · ariadnegraphql.org
File uploads
Ariadne implements the GraphQL multipart request specification, and its default Upload scalar is write-only and supports values passed through variables.Read 8 Oct 2026 · ariadnegraphql.org
Resolvers
Ariadne connects schema fields to application business logic through resolver functions.Read 8 Oct 2026 · ariadnegraphql.org
Server interfaces
Ariadne provides WSGI and ASGI apps for serving GraphQL APIs.Read 8 Oct 2026 · ariadnegraphql.org
Server schema
Developers define API schemas using GraphQL Schema Definition Language (SDL).Read 8 Oct 2026 · ariadnegraphql.org
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.Read 8 Oct 2026 · ariadnegraphql.org
Typed client
Ariadne Codegen generates a typed Python client and Pydantic models from a GraphQL schema and operations.Read 8 Oct 2026 · ariadnegraphql.org

Plans and prices

Ariadne Free Open-source Python GraphQL server and client libraries Read 8 Oct 2026 · ariadnegraphql.org

Every Ariadne plan and price →

Strong points and limits

Strong points

  • Supports synchronous and asynchronous query execution
  • WSGI and ASGI serving apps
  • Generates typed Python clients and Pydantic models
  • Runtime validation of generated client results
  • Multipart request specification for uploads

Limits

  • Self-hosted deployment
  • AsyncSession integration is ASGI-only
  • Default Upload scalar is write-only
  • Sibling root-field limitation is documented

Who it suits

It suits Python developers building GraphQL APIs who want schema-first server tools and generated typed clients. Teams using SQLAlchemy AsyncSession should account for its ASGI-only support and documented sibling-root-field limitation.

Verdict

Ariadne provides schema-first GraphQL server capabilities alongside client code generation and validation. It is a free, self-hosted option for Python applications, with documented constraints for some upload and SQLAlchemy use cases.

Where Specifiction places it

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