Comparison

Black vs Trunk

On the evidence we track, Black 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.

Black full profile →Trunk full profile →

Machine formatsJSON Markdown GraphQLor send Accept: application/json

★Black73

Trunk59

Attribute comparison across 2 tools
Attribute	BlackLeader	Trunk
Vioscale score	73 / 100high · 78%	59 / 100medium · 74%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	open_source	freemium
Price levelpricing.price_level	free	free
Transparentpricing.transparent	✓	✓
Integrations
Countintegrations.count	8	7
Security
Disclosure policysecurity.disclosure_policy	✓	-
Scorecardsecurity.scorecard	7.7	-
Soc2security.soc2	-	✓
Vulnerabilitiessecurity.vulnerabilities	Count: 2 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=black&per_page=100 · Last 12m: 1 · Max severity: HIGH	-
Reliability
Status pagereliability.status_page	-	✓
Adoption
Dependent reposadoption.dependent_repos	105,588	-
Github starsadoption.github_stars	41,816	-
Package downloads weeklyadoption.package_downloads_weekly	39,005,228	-
Activity
Commits last 30dactivity.commits_last_30d	29	-
Release
Cadence daysrelease.cadence_days	31	-
Historyrelease.history	20 items	-
License
Spdxlicense.spdx	MIT	-
Language
Primarylanguage.primary	Python	-
Market
Availabilitymarket.availability	-	Available worldwide · Popular in US · HQ US

Score

Vioscale score

Black73 / 100high · 78%

Trunk59 / 100medium · 74%

Pricing

Free tier

Black✓

Trunk✓

Model

Blackopen_source

Trunkfreemium

Price level

Blackfree

Trunkfree

Transparent

Black✓

Trunk✓

Integrations

Count

Black8

Trunk7

Security

Disclosure policy

Black✓

Trunk–

Scorecard

Black7.7

Trunk–

Soc2

Black–

Trunk✓

Vulnerabilities

BlackCount: 2 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=black&per_page=100 · Last 12m: 1 · Max severity: HIGH

Trunk–

Reliability

Status page

Black–

Trunk✓

Adoption

Dependent repos

Black105,588

Trunk–

Github stars

Black41,816

Trunk–

Package downloads weekly

Black39,005,228

Trunk–

Activity

Commits last 30d

Black29

Trunk–

Release

Cadence days

Black31

Trunk–

History

Black20 items

Trunk–

License

Spdx

BlackMIT

Trunk–

Language

Primary

BlackPython

Trunk–

Market

Availability

Black–

TrunkAvailable worldwide · Popular in US · HQ US

Capabilities

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

Capability comparison for Code Quality Tools
Capability	Black	Trunk
Core
Function	Formatter	-
Language scope	Single-language	-
Implementation language	Python	-
Capability
Autofix	✓	✓
Config
Config model	Zero-config	-
Extensibility
Custom rules	✗	-
Deployment
Deployment	Both	-
Delivery
Editor integration	✓	-
CI / VCS gating	✓	✓
Insight
Code metrics	✗	-
Performance
Incremental / monorepo aware	✗	-
Licensing
Open-source	OSS	Closed
Commercial
Pricing model	Free	Per-contributor

Core

Function

BlackFormatter

Trunk-

Language scope

BlackSingle-language

Trunk-

Implementation language

BlackPython

Trunk-

Capability

Autofix

Black✓

Trunk✓

Config

Config model

BlackZero-config

Trunk-

Extensibility

Custom rules

Black✗

Trunk-

Deployment

BlackBoth

Trunk-

Delivery

Editor integration

Black✓

Trunk-

CI / VCS gating

Black✓

Trunk✓

Insight

Code metrics

Black✗

Trunk-

Performance

Incremental / monorepo aware

Black✗

Trunk-

Licensing

Open-source

BlackOSS

TrunkClosed

Commercial

Pricing model

BlackFree

TrunkPer-contributor

What each one is

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

Black

Leader

An opinionated Python code formatter that automatically reformats code according to a standardized style. It produces minimal diffs for cleaner code review and reduces developer cognitive load by removing formatting decisions, allowing focus on code logic.

Independently observed

Trunk

A platform that identifies unstable tests, automatically isolates them from blocking merges, and provides intelligent merge queue management to reduce build delays and developer friction.

Independently observed

Pricing

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

Black

Leader

Open sourceFree tier

Free and open source (MIT licensed)

as of 2026-08-14verify ↗

Trunk

from $0/moSubscriptionFree tier

Free tier available. Team and Enterprise plans available with volume-based discounts on test spans.

FreeFree
- Flaky test detection and quarantining
- PR comments with test summaries
- GitHub integration
- Slack notifications
- CLI and VS Code usage
- +3 more
Team$0/committer/month
- Everything in Free, plus:
- Unlimited committers
- Volume discounts on test spans
- Merge queue with anti-flake protection
- Intelligent PR batching (up to 100 PRs)
- +6 more
EnterpriseContact sales
- Everything in Team, plus:
- Single Sign-On (SSO) with custom providers
- SAML support
- On-premise deployment
- Advanced admin and authentication controls
- +6 more

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	Black	Trunk
WebPlatforms	✗	✓
CLIPlatforms	✓	✓
Cloud / SaaSDeployment	✗	✓
Self-hostedDeployment	✓	✓
On-premiseDeployment	✗	✓

Platforms

Web

Black✗

Trunk✓

CLI

Black✓

Trunk✓

Deployment

Cloud / SaaS

Black✗

Trunk✓

Self-hosted

Black✓

Trunk✓

On-premise

Black✗

Trunk✓

Integrations

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

Black

Leader

8 total

Neovim
conform.nvim
ALE
SublimeText
Pre-commit
Jupyter Notebooks
blacken-docs
blackdoc

Independently observed

Trunk

9 total

GitHub
Slack
Linear
Jira
Google (OAuth/SSO)
Microsoft (OAuth/SSO)
Jenkins
CircleCI
Travis CI

Independently observed

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