Backend · 3 min read
Django vs FastAPI vs NestJS: Which Backend Framework to Pick
Poll results and real project experience comparing Django, FastAPI and NestJS: strengths, trade-offs and a simple way to choose.
By Ali Iftikhar · · Updated
Which backend framework should you use? I recently ran a quick poll with backend developers to see what people reach for most. The 21 votes came out like this:
| Framework | Share of votes |
|---|---|
| Django | 42% |
| FastAPI | 28% |
| NestJS | 14% |
| Other | 14% |
It is a small sample, so treat it as a conversation starter and not a market survey. But the results match what I see in practice. Here is how I think about the three.
Django: batteries included
Django is a mature Python framework that ships with most of what a product needs.
Where it shines
- Built-in authentication, permissions and sessions.
- An admin interface that doubles as an internal control panel.
- A powerful ORM and migrations for rich data models.
- A large ecosystem and a very mature community.
Trade-offs: it is opinionated, and for a tiny, async-heavy microservice it can feel like more framework than you need.
I used Django for Savoir AI, a production platform with 80+ REST APIs, multi-tenancy and AI features, and I explain that decision in why I chose Django for a production AI SaaS.
FastAPI: fast to build, typed by default
FastAPI is a modern Python framework built around type hints and async support.
Where it shines
- Automatic request validation and interactive API documentation from your type hints.
- Strong async support, good for I/O-heavy services and integrations.
- Lightweight, so you add only what you need.
Trade-offs: you assemble more of the stack yourself, such as authentication, admin tooling and project structure. That flexibility is great with an experienced team and a risk without one.
I used FastAPI for the backend of ZARM, where lead workflows, cohort scheduling and role-based access were the core requirements.
NestJS: structure for TypeScript teams
NestJS brings an opinionated, modular architecture to Node.js and TypeScript.
Where it shines
- One language across front end and back end.
- Clear structure with modules, providers and dependency injection, which helps larger teams stay consistent.
- A natural fit when your team already lives in TypeScript.
Trade-offs: you often build or integrate more of the application-level features yourself, and the learning curve for its patterns is real.
A simple way to choose
| If you need... | Lean toward |
|---|---|
| A full product with auth, admin, a rich data model and multi-tenancy | Django |
| A lean, typed API or an async-heavy service | FastAPI |
| One TypeScript codebase and a structured architecture | NestJS |
Then ask a few practical questions:
- What does your team already know? Familiarity beats theoretical perfection.
- How much do you want built in versus assembled? Django gives more out of the box. FastAPI and NestJS give more freedom.
- How long will this live? Long-lived products reward strong conventions and a mature ecosystem.
- What are the integration needs? AI and data work often favour Python.
My default
For a production SaaS application with long-term maintainability in mind, Django is still my first choice, because it lets me focus on business problems instead of rebuilding common features. When the problem is a focused, API-first service, I reach for FastAPI. NestJS is a strong option when TypeScript end to end is the priority.
The best framework is the one that fits your problem, your team and your timeline. Which one do you use the most, and why?