Software · head to head
.NET vs FastAPI
F
FastAPI
Software
A modern, fast, high-performance web framework for building APIs with Python
- From
- Free
- Rated
- -
The short version
- Each has a real cost: .NET .NET 8 and .NET 9 both reach end of support on 10 November 2026, per dotnet.microsoft.com/en-us/platform/support/policy (Aug 2026), forcing an upgrade to .NET 10 by that date; FastAPI licensed under the MIT License per fastapi.tiangolo.com; as open source software it has no paid tier or vendor price to compare
Where they differ
Only the attributes on which .NET and FastAPI actually diverge.
Identical on both: starting price (Free), pricing model (open-source), free tier (Yes), platforms (Web), user rating (Not yet rated), category (Unknown).
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
.NET
- .NET 8 and .NET 9 both reach end of support on 10 November 2026, per dotnet.microsoft.com/en-us/platform/support/policy (Aug 2026), forcing an upgrade to .NET 10 by that date
- Standard Term Support releases get only 2 years of patches versus 3 years for Long Term Support releases, per Microsoft's own support policy page, so teams on an STS release face a shorter upgrade cycle
FastAPI
- Licensed under the MIT License per fastapi.tiangolo.com; as open source software it has no paid tier or vendor price to compare
- FastAPI depends entirely on Starlette for its web layer and Pydantic for validation, per its own documentation, so it is not a standalone framework and inherits both dependencies' constraints
Pricing, plan by plan
.NET
FreeNo published plan breakdown. See the .NET review.
FastAPI
FreeNo published plan breakdown. See the FastAPI review.
Which should you pick?
Questions people ask
- Is .NET or FastAPI better?
- Neither clearly leads. .NET starts at Free and FastAPI at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, .NET or FastAPI?
- .NET starts at Free and FastAPI at Free.
- Does .NET or FastAPI run on more platforms?
- Both run on Web, so platform support will not decide this one for you.
- Can I use .NET for free?
- Both have a free tier, so you can try either at no cost before committing.