ComposalAPI and performance testing
Composal vs Postman
Postman focuses on API requests and response validation. Composal focuses on browser-based user journeys, Scenarios, Discovery, and exploratory Deep Scan.
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 →Postman
API development, functional tests, and collaboration
Postman provides an API client and collaboration environment where teams can organize requests into collections, add pre-request and post-response scripts, and test API behavior. Collections can model multi-request workflows and run from the desktop, CLI, or CI integrations.
What each tool does
“With setup” means you supply code or configuration. “Not confirmed” means support for this workflow needs checking with the vendor.
| Workflow | Composal | Postman |
|---|---|---|
| Run browser journeys | Yes Run saved browser Scenarios and return recordings and reproducible Findings. | Not confirmed Check whether this product includes this workflow in your intended plan and setup. |
| 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. | Yes Run API collections from the Postman CLI or CI. |
| API and protocol testing | No Use a dedicated tool for this specialist workflow alongside Composal’s browser verification. | Yes Postman provides an API client and collaboration environment where teams can organize requests into collections, add pre-request and post-response scripts, and test API behavior. Collections can model multi-request workflows and run from the desktop, CLI, or CI integrations. |
Where each fits
Choose Postman when developers and QA need to author, share, execute, and document API requests and functional checks.
Try this evaluation
Choose one user action backed by a documented API sequence.
- 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?