Comparison

Ruff vs SpotBugs

On the evidence we track, Ruff 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.

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
★Ruff73
SpotBugs55
Score
vioscaleAI score
Ruff73 / 100medium · 68%
SpotBugs55 / 100low · 48%
Pricing
Free tier
Ruff–
SpotBugs✓
Model
Price level
Ruff–
SpotBugsfree
Integrations
Count
Ruff6
SpotBugs3
Reliability
Status page
Ruff–
SpotBugs✓
Adoption
Dependent repos
Ruff5,870
SpotBugs2,768
Github stars
Ruff49,914
SpotBugs3,954
Package downloads weekly
SpotBugs–
Activity
Commits last 30d
Ruff100
SpotBugs72
Release
Cadence days
Ruff7
SpotBugs27
History
SpotBugs20 items
License
Spdx
RuffMIT
SpotBugsLGPL-2.1
Language
Primary
RuffRust
SpotBugsJava
Market
Content
Faq
SpotBugs6 items

Capabilities

Feature-by-feature on the axes that matter for code quality tools. “-” means undocumented, not absent.

Core
Function
RuffLinter
SpotBugsStatic analyzer
Language scope
RuffSingle-language
SpotBugsSingle-language
Implementation language
RuffRust
SpotBugsJava
Capability
Autofix
Ruff✓
SpotBugs✗
Config
Config model
Ruff-
SpotBugsRule packs
Extensibility
Custom rules
Ruff-
SpotBugs✓
Deployment
Deployment
RuffCLI-local
SpotBugsCLI-local
Delivery
Editor integration
Ruff✓
SpotBugs✓
CI / VCS gating
Ruff-
SpotBugs✓
Insight
Code metrics
Ruff-
SpotBugs-
Performance
Incremental / monorepo aware
Ruff✓
SpotBugs-
Licensing
Open-source
RuffOSS
SpotBugsOSS
Commercial
Pricing model
RuffFree
SpotBugsFree

What each one is

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

Ruff

Leader

A tool for analyzing and formatting Python code, designed to be fast and efficient through Rust implementation, with support across multiple platforms.

Independently observed

SpotBugs

SpotBugs performs static analysis on Java code to identify potential bugs and code quality issues.

Independently observed

Pricing

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

Ruff

Leader

Pricing not documented yet.

SpotBugs

Open source
as of verify ↗

Platform & deployment

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

Platforms
macOS
Ruff✓
SpotBugs✗
Windows
Ruff✓
SpotBugs✗
Linux
Ruff✓
SpotBugs✗
CLI
Ruff✓
SpotBugs✓
Deployment
Self-hosted
Ruff✓
SpotBugs✓
On-premise
Ruff✗
SpotBugs✓

Integrations

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

Ruff

Leader
7 total
  • Flake8
  • isort
  • Autoflake
  • Pyflakes
  • pycodestyle
  • Pylint
  • Visual Studio Code
Independently observed

SpotBugs

7 total
  • Maven
  • Gradle
  • Eclipse
  • Ant
  • fb-contrib
  • find-sec-bugs
  • VS Code
Independently observed
Still deciding?

Ruff or SpotBugs: 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.