API and performance testing

Composal vs SmartBear ReadyAPI

ReadyAPI addresses service-level testing and can cover functional, security, and performance checks around APIs. Composal checks browser-facing application behavior through Scenarios and exploratory sessions.

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 →

SmartBear ReadyAPI

Enterprise API functional, security, and performance testing

ReadyAPI is SmartBear’s commercial API testing suite for functional validation and related API quality tasks.

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 SmartBear ReadyAPI workflow capabilities
Workflow	Composal	SmartBear ReadyAPI
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.	With setup Connect its specialist checks to your development workflow using supported integrations.
API and protocol testing	No Use a dedicated tool for this specialist workflow alongside Composal’s browser verification.	Yes ReadyAPI is SmartBear’s commercial API testing suite for functional validation and related API quality tasks.

Where each fits

Choose ReadyAPI when API validation spans multiple protocols or requires centralized functional, security, and performance workflows. Choose Composal when the important release evidence is user-facing browser behavior and exploratory QA of a web app.

Try this evaluation

Take an API-backed workflow with a successful response, an authorization failure, and a slow dependency.

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?