Comparison

FastAPI vs Spring Boot

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
Spring Boot66
Score
vioscaleAI score
FastAPI78 / 100medium · 69%
Spring Boot66 / 100medium · 51%
Pricing
Free tier
FastAPI✓
Spring Boot✓
Model
Spring Bootfreemium
Price level
FastAPIfree
Spring Bootlow
Integrations
Count
FastAPI11
Spring Boot–
Reliability
Status page
FastAPI✓
Spring Boot✓
Adoption
Dependent repos
FastAPI43,608
Spring Boot164,184
Github stars
FastAPI102,768
Spring Boot81,557
Package downloads weekly
FastAPI97,378,207
Spring Boot–
Stackoverflow questions
FastAPI31,000
Spring Boot–
Activity
Commits last 30d
FastAPI63
Spring Boot100
Release
Cadence days
FastAPI14
Spring Boot–
History
FastAPI20 items
Spring Boot20 items
License
Spdx
FastAPIMIT
Spring BootApache-2.0
Language
Primary
FastAPIPython
Spring BootJava
Market
Availability
Spring Boot–
Content
Faq
FastAPI8 items
Spring Boot3 items

Capabilities

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

Core
Rendering model
FastAPI-
Spring Boot-
File-based routing
FastAPI-
Spring Boot-
Language
FastAPIPython
Spring BootJava
Rendering
Server components
FastAPI-
Spring Boot✓
Streaming SSR
FastAPI-
Spring Boot-
Fullstack
Built-in API / backend routes
FastAPI✓
Spring Boot✓
DX
First-class TypeScript
FastAPI-
Spring Boot-
Fast refresh / HMR
FastAPI✓
Spring Boot-
Deployment
Edge runtime support
FastAPI-
Spring Boot-

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

Spring Boot

Enables developers to create complete server applications quickly using embedded web servers, automatic dependency configuration, and built-in operational features.

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 ↗

Spring Boot

HybridFree tier
as of verify ↗

Platform & deployment

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

Platforms
Web
FastAPI✓
Spring Boot–
CLI
FastAPI✓
Spring Boot–
Deployment
Cloud / SaaS
FastAPI✓
Spring Boot✗
Self-hosted
FastAPI✗
Spring Boot✓

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

Spring Boot

Not documented yet.

Still deciding?

FastAPI or Spring Boot: 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.