Code review

Composal vs Danger JS

Danger enforces team-defined review policy from pull request metadata and diffs. Composal checks the behavior of a deployed application through browser Scenarios and exploratory runs.

See where each fits ↓

Two workflows, side by side

Composal

Composal sends AI browser agents to use your running web app and check the outcomes you care about. Define journeys as plain-English Scenarios, map existing flows with Discovery, or explore for bugs with Deep Scan. Runs keep recordings and reproduction steps so your team or coding agent can investigate a Finding.

Verify documentation →

Danger JS

Automated policy checks on pull requests

Danger runs user-authored rules in continuous integration and posts feedback on code review changes. Teams use it for checks such as missing changelog entries, oversized diffs, or repository conventions.

What each tool does

“With setup” means you supply code or configuration. “Not confirmed” means support for this workflow needs checking with the vendor.

Composal and Danger JS workflow capabilities
Workflow	Composal	Danger JS
Run browser journeys	Yes Run saved browser Scenarios and return recordings and reproducible Findings.	No The documented product reviews or analyzes source changes; it does not execute browser journeys.
Map application workflows	Yes Discovery maps key application areas and user journeys.	Not confirmed Check whether this product includes this workflow in your intended plan and setup.
Explore for unexpected issues	Yes Deep Scan explores the running application and reports reproducible issues.	Not confirmed Check whether this product includes this workflow in your intended plan and setup.
Describe checks in plain English	Yes Author Scenarios around the intended user outcome, then review the steps and expected results.	Not confirmed Check whether this product includes this workflow in your intended plan and setup.
Run or inspect from a terminal	Yes Use the CLI to start and inspect verification runs and their Findings.	With setup Connect its specialist checks to your development workflow using supported integrations.
Source code review and analysis	No Use a dedicated tool for this specialist workflow alongside Composal’s browser verification.	Yes Danger runs user-authored rules in continuous integration and posts feedback on code review changes. Teams use it for checks such as missing changelog entries, oversized diffs, or repository conventions.

Where each fits

Choose Danger when flexible, repository-owned pull request rules are needed. Choose Composal when acceptance criteria must be exercised in a live web app. The tools cover policy and behavior respectively.

Try this evaluation

Add a rule for a required migration note and open a preview for a changed workflow. Compare Danger policy feedback with Composal’s browser outcome and Findings, including the clarity of each failure.

Coverage: Which user outcomes must this release prove, and which specialist checks must stay in your existing stack?
Setup: Who prepares accounts, test data, permissions and access to the deployment being tested?
Evidence: Can the engineer reproduce a reported failure from the recording and steps, without asking the tester to investigate again?
Ownership: Who updates the checks when the product changes, and can the team review what a passing result actually proves?