# Composal vs Detox

Detox is tailored to native React Native application tests and can coordinate with app internals. Composal verifies web apps from the browser and explores additional user-facing behavior.

## 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.com/docs/verify)

## Detox

React Native end-to-end testing

Detox is an open-source end-to-end testing framework for React Native apps. It uses a gray-box approach with access to application internals and provides synchronization for mobile test execution.

## What each tool does

| Workflow | Composal | Detox |
| --- | --- | --- |
| [Run browser journeys](https://composal.com/product/scenarios) | ✓ Yes: Run saved browser Scenarios and return recordings and reproducible Findings. | – With setup: Automates native mobile app journeys; confirm web coverage separately if your release also includes a web app. |
| [Map application workflows](https://composal.com/product/discovery) | ✓ 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](https://composal.com/product/deep-scan) | ✓ 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](https://composal.com/product/scenarios) | ✓ Yes: Author Scenarios around the intended user outcome, then review the steps and expected results. | – With setup: Write executable tests, scripts, or structured keywords to define the steps and expected results. |
| [Run or inspect from a terminal](https://composal.com/product/cli) | ✓ Yes: Use the CLI to start and inspect verification runs and their Findings. | – With setup: Run configured tests through the product’s supported developer tools or CI integration. |

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

## Where each fits

Choose Detox when your product’s critical surface is a React Native mobile application. Choose Composal when the release includes a web app journey that needs hosted browser Scenarios and exploratory Findings.

## Try this evaluation

Take a cross-platform account journey with shared backend rules. Run Detox against the native flow and Composal against the web flow; compare coverage of the common requirement and how defects are reproduced.

### 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?

## Related comparisons

- [Composal vs TestCafe](https://composal.com/compare/composal-vs-testcafe.md)
- [Composal vs Nightwatch.js](https://composal.com/compare/composal-vs-nightwatch.md)
- [Composal vs Playwright](https://composal.com/compare/composal-vs-playwright.md)

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