Choose Django when you want a broad web framework with built-in users, permissions, and a staff-facing model admin. Choose FastAPI when the application is API-first and its route-oriented development and OpenAPI documentation fit your workflow. Both support asynchronous work, but neither framework makes blocking dependencies non-blocking automatically.
The practical differences are what each gives you out of the box, how its async request path works, and how much identity and administration infrastructure your team wants to assemble.
What is the main difference between Django and FastAPI?
Django is a broad web framework for building database-backed applications, with integrated authentication and a configurable admin site. FastAPI focuses on APIs: it provides path operations, supports synchronous and asynchronous endpoint functions, and generates OpenAPI-based documentation. Django can also serve APIs, commonly with Django REST Framework (DRF), an additional toolkit rather than Django core.
Neither is universally better. Django can reduce the work of a broader application with staff data-management needs; FastAPI can suit a service centered on API routes and generated API documentation.
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Does Django support async?
Yes. Django 6.0 documents async views and asynchronous ORM query variants. To get a fully asynchronous request path, deploy under ASGI and use compatible middleware. Django can run async views under WSGI, but that does not provide the benefits of a fully asynchronous stack or efficient long-running requests. For streaming or long-polling requests, Django recommends ASGI.
What to check in a Django async application
- Middleware: Synchronous middleware in an ASGI path is adapted in its own thread. The middleware chain therefore affects how the request runs.
- Database work: Query-producing ORM operations have asynchronous,
a-prefixed variants, and QuerySets supportasync for. Some APIs remain synchronous or async-unsafe. - Synchronous-only operations: Use
sync_to_async()to call synchronous functions from async code, or move the work into a synchronous helper.
Django warns that setting DJANGO_ALLOW_ASYNC_UNSAFE can cause data loss or corruption when concurrent access occurs; it is not a production workaround.
How does FastAPI handle async endpoints?
FastAPI supports both async def and ordinary def path operations, and lets an application mix them. Follow the capabilities of the libraries an endpoint calls: use async def when those libraries support await; use ordinary def for blocking libraries that do not.
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This applies to the whole request path, not just the endpoint declaration. A non-awaitable database driver, HTTP client, or other blocking dependency can still block even when the route is written with async def.
Which framework is faster?
There is no defensible universal speed winner here. The official documentation does not provide a controlled Django-versus-FastAPI benchmark for the same workload and deployment. Performance depends on the endpoint, middleware, database driver, external clients, and deployment configuration. If latency or throughput targets matter, benchmark the actual application and its dependencies under representative conditions rather than treating framework choice as a performance guarantee.
Does FastAPI have an admin panel?
FastAPI’s cited core documentation covers API features, security utilities, and generated API documentation; it does not describe a Django-style integrated model admin. If staff need to manage records in a FastAPI application, plan to choose a separate administrative interface or build a separate application. This is a distinction in documented core scope, not a claim that third-party admin packages do not exist.
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What Django’s admin is for
Django’s admin can be configured around registered models so trusted staff can manage application data. Django’s documentation sets a clear boundary: “The admin is not intended to be used by users to manage their own data.” It is an internal data-management tool, not a ready-made public product interface.
How do authentication and authorization compare?
Django includes an authentication framework with configurable backends and built-in permissions. FastAPI provides security utilities that can be composed into path operations through dependencies, but the application team must choose and implement or integrate the identity, token, and authorization behavior it needs. A security helper alone is not a complete user-management system.
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Django’s default ModelBackend checks the Django user database and built-in permissions. It does not provide brute-force rate limiting by itself; a project can add rate limiting through a custom backend or web-server mechanisms. Django’s authentication customization documentation also describes async support in its bundled backends. When extending a backend, keep modified async methods aligned with their synchronous counterparts.
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FastAPI security
FastAPI’s dependency-based security utilities provide building blocks for API security. The application still needs a scheme and implementation suited to its requirements, including how credentials or tokens are handled and what access rules apply.
Using Django REST Framework for APIs
DRF adds configurable authentication schemes and permission policies to Django APIs. Authentication associates credentials with a request; permissions decide whether that request should proceed. For AJAX APIs using session authentication, unsafe methods require a valid CSRF token.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Which framework is better for APIs?
Both can serve APIs. FastAPI is API-centered and documents an OpenAPI workflow with interactive documentation URLs, making it a natural fit when route definitions, request handling, and generated API documentation are central. Django can also power APIs; DRF is a common additional toolkit when an application needs Web API features and configurable authentication and permission policies.
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Compare the actual stack you intend to build. Do not attribute DRF’s facilities to Django core, or assume that an API-focused framework automatically selects the right identity and access-control design for your product.
How should you choose?
| Project consideration | Django is worth considering when… | FastAPI is worth considering when… |
|---|---|---|
| Application scope | You are building a broader, database-backed application and want integrated users, permissions, and staff model administration. | The central product is an API service rather than a broader application with built-in staff CRUD needs. |
| API workflow | You want APIs as part of a Django application and are prepared to use a toolkit such as DRF where needed. | API path operations and an OpenAPI-based documentation workflow are core to the service. |
| Async dependencies | Your deployment can use ASGI, and you have accounted for middleware and synchronous-only operations. | Your database driver, HTTP client, and other important dependencies support awaitable use where you plan to use async def. |
| Identity and access | Django’s users, sessions, permissions, and backend extension points align with the application. | Your team is ready to select and compose the required authentication and authorization components. |
| Existing system and team | Existing Django models, admin workflows, authentication, or operating practices reduce migration and delivery work. | The team’s existing systems and practices fit an API-centered application without Django’s integrated application features. |
The best choice follows the capabilities that will actually save work or meet requirements. Evaluate the complete dependency and deployment stack for async behavior; endpoint syntax alone does not establish that an application is non-blocking.
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