Comparison

FastAPI vs Symfony

On the evidence we track, FastAPI leads this comparison with a composite score of 78/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
★FastAPI78
Symfony63
Score
vioscaleAI score
FastAPI78 / 100medium · 69%
Symfony63 / 100medium · 61%
Pricing
Free tier
FastAPI✓
Symfony✓
Model
Symfonycommercial
Price level
FastAPIfree
Symfonyfree
Transparent
FastAPI–
Symfony✓
Integrations
Count
FastAPI11
Symfony4
Reliability
Status page
FastAPI✓
Symfony–
Adoption
Dependent repos
FastAPI43,608
Symfony22,779
Github stars
FastAPI102,768
Symfony31,164
Package downloads weekly
FastAPI97,378,207
Symfony–
Stackoverflow questions
FastAPI31,000
Symfony–
Activity
Commits last 30d
FastAPI63
Symfony100
Release
Cadence days
FastAPI14
Symfony–
History
FastAPI20 items
Symfony20 items
License
Spdx
FastAPIMIT
SymfonyMIT
Language
Primary
FastAPIPython
SymfonyPHP
Market
Content
Faq
FastAPI8 items
Symfony7 items

Capabilities

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

Core
Rendering model
FastAPI-
SymfonyHybrid (SSR+SSG+CSR)
File-based routing
FastAPI-
Symfony-
Language
FastAPIPython
SymfonyPHP
Rendering
Server components
FastAPI-
Symfony-
Streaming SSR
FastAPI-
Symfony-
Fullstack
Built-in API / backend routes
FastAPI✓
Symfony✓
DX
First-class TypeScript
FastAPI-
Symfony-
Fast refresh / HMR
FastAPI✓
Symfony-
Deployment
Edge runtime support
FastAPI-
Symfony-

What each one is

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

FastAPI

Leader

A Python web framework designed for creating APIs with automatic documentation, built on standard protocols and type hints to enable rapid development and deployment.

Independently observed

Symfony

A complete PHP framework that bundles routing, database mapping, templates, validation, testing, and security tools in a cohesive package for building web applications.

Independently observed

Pricing

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

FastAPI

Leader
Open sourceFree tier
as of verify ↗

Symfony

Open sourceFree tier

Free and open source under MIT license

as of verify ↗

Platform & deployment

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

Platforms
Web
FastAPI✓
Symfony✓
CLI
FastAPI✓
Symfony✓
Deployment
Cloud / SaaS
FastAPI✓
Symfony✓

Integrations

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

FastAPI

Leader
11 total
  • Starlette
  • Pydantic
  • OpenAPI
  • JSON Schema
  • Swagger UI
  • ReDoc
  • OAuth2
  • JWT
  • HTTP Basic authentication
  • Cookies
  • Session management
Independently observed

Symfony

4 total
  • Drupal
  • Laravel
  • API Platform
  • Composer
Independently observed
Still deciding?

FastAPI or Symfony: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

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