Comparison

ASP.NET Core vs FastAPI

On the evidence we track, FastAPI leads this comparison with a composite score of 73/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

ASP.NET Core full profile →FastAPI full profile →

Machine formatsJSON Markdown GraphQLor send Accept: application/json

ASP.NET Core62

★FastAPI73

Attribute comparison across 2 tools
Attribute	ASP.NET Core	FastAPILeader
Vioscale score	62 / 100high · 75%	73 / 100high · 78%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	free	commercial
Price levelpricing.price_level	free	free
Transparentpricing.transparent	✓	-
Integrations
Countintegrations.count	5	11
Security
Vulnerabilitiessecurity.vulnerabilities	-	Count: 2 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=fastapi&per_page=100 · Last 12m: 0 · Max severity: HIGH
Reliability
Status pagereliability.status_page	-	✓
Adoption
Dependent reposadoption.dependent_repos	-	43,608
Github starsadoption.github_stars	-	101,862
Package downloads weeklyadoption.package_downloads_weekly	-	127,838,650
Stackoverflow questionsadoption.stackoverflow_questions	-	31,000
Activity
Commits last 30dactivity.commits_last_30d	-	210
Release
Cadence daysrelease.cadence_days	-	14
Historyrelease.history	-	20 items
License
Spdxlicense.spdx	-	MIT
Language
Primarylanguage.primary	-	Python
Market
Availabilitymarket.availability	-	Available worldwide · HQ ES
Content
Faqcontent.faq	-	8 items

Score

Vioscale score

ASP.NET Core62 / 100high · 75%

FastAPI73 / 100high · 78%

Pricing

Free tier

ASP.NET Core✓

FastAPI✓

Model

ASP.NET Corefree

FastAPIcommercial

Price level

ASP.NET Corefree

FastAPIfree

Transparent

ASP.NET Core✓

FastAPI–

Integrations

Count

ASP.NET Core5

FastAPI11

Security

Vulnerabilities

ASP.NET Core–

FastAPICount: 2 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=fastapi&per_page=100 · Last 12m: 0 · Max severity: HIGH

Reliability

Status page

ASP.NET Core–

FastAPI✓

Adoption

Dependent repos

ASP.NET Core–

FastAPI43,608

Github stars

ASP.NET Core–

FastAPI101,862

Package downloads weekly

ASP.NET Core–

FastAPI127,838,650

Stackoverflow questions

ASP.NET Core–

FastAPI31,000

Activity

Commits last 30d

ASP.NET Core–

FastAPI210

Release

Cadence days

ASP.NET Core–

FastAPI14

History

ASP.NET Core–

FastAPI20 items

License

Spdx

ASP.NET Core–

FastAPIMIT

Language

Primary

ASP.NET Core–

FastAPIPython

Market

Availability

ASP.NET Core–

FastAPIAvailable worldwide · HQ ES

Content

Faq

ASP.NET Core–

FastAPI8 items

Capabilities

Feature-by-feature on the axes that matter for web frameworks. “-” means undocumented, not absent.

Capability comparison for Web Frameworks
Capability	ASP.NET Core	FastAPI
Core
Rendering model	-	-
File-based routing	-	-
Language	C#	Python
Rendering
Server components	-	-
Streaming SSR	-	-
Fullstack
Built-in API / backend routes	✓	✓
DX
First-class TypeScript	-	-
Fast refresh / HMR	-	✓
Deployment
Edge runtime support	-	-

Core

Rendering model

ASP.NET Core-

FastAPI-

File-based routing

ASP.NET Core-

FastAPI-

Language

ASP.NET CoreC#

FastAPIPython

Rendering

Server components

ASP.NET Core-

FastAPI-

Streaming SSR

ASP.NET Core-

FastAPI-

Fullstack

Built-in API / backend routes

ASP.NET Core✓

FastAPI✓

First-class TypeScript

ASP.NET Core-

FastAPI-

Fast refresh / HMR

ASP.NET Core-

FastAPI✓

Deployment

Edge runtime support

ASP.NET Core-

FastAPI-

What each one is

The product in its own terms, so the numbers below have context.

ASP.NET Core

A framework for building web apps and services with .NET and C#. Includes Blazor for web UI development, REST APIs, real-time communication, and AI/ML capabilities.

Independently observed

FastAPI

Leader

FastAPI is a modern web framework for constructing APIs in Python that combines high performance with developer convenience through automatic validation, interactive documentation generation, and first-class type hint support.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

ASP.NET Core

FreeFree tier

Free and open source

as of 2026-08-13verify ↗

FastAPI

Leader

Open sourceFree tier

as of 2026-08-14verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	ASP.NET Core	FastAPI
WebPlatforms	✓	✓
macOSPlatforms	✓	✗
WindowsPlatforms	✓	✗
LinuxPlatforms	✓	✗
CLIPlatforms	✗	✓
Cloud / SaaSDeployment	✓	✓
Self-hostedDeployment	✓	✓
On-premiseDeployment	✓	✗

Platforms

Web

ASP.NET Core✓

FastAPI✓

macOS

ASP.NET Core✓

FastAPI✗

Windows

ASP.NET Core✓

FastAPI✗

Linux

ASP.NET Core✓

FastAPI✗

CLI

ASP.NET Core✗

FastAPI✓

Deployment

Cloud / SaaS

ASP.NET Core✓

FastAPI✓

Self-hosted

ASP.NET Core✓

FastAPI✓

On-premise

ASP.NET Core✓

FastAPI✗

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

ASP.NET Core

5 total

Google
X
OpenAI
Azure
Power Apps

Independently observed

FastAPI

Leader

11 total

Starlette
Pydantic
OpenAPI
JSON Schema
Swagger UI
ReDoc
OAuth2
JWT
HTTP Basic authentication
Cookies
Session management

Independently observed

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.