# Composal vs Danger JS

By Composal. Sources reviewed: 2026-10-15.

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.

## 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](https://composal.ai/docs/verify)

## 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.

[Official product or project documentation](https://danger.systems/js/)

## 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?

## Sources and scope

Prepared by Composal with AI-assisted research using the linked first-party product pages and documentation. These are workflow comparisons, not independent benchmarks or an exhaustive feature inventory. A documented capability is not a guarantee for every plan or environment; validate your own requirements in a trial.

- [Danger JS](https://danger.systems/js/)
- [Composal Verify](https://composal.ai/docs/verify)
- [Composal Deep Scan](https://composal.ai/product/deep-scan)

No comparative speed, price or accuracy score is claimed here. Product names belong to their respective owners.

## Related comparisons

- [Composal vs Bitbucket code review](https://composal.ai/compare/composal-vs-bitbucket-code-review.md)
- [Composal vs Azure Repos pull request review](https://composal.ai/compare/composal-vs-azure-repos-pull-requests.md)
- [Composal vs RhodeCode](https://composal.ai/compare/composal-vs-rhodecode.md)

[All comparisons](https://composal.ai/compare.md)