Stably

Overview and fit

Compatibility

Test languages

JavaScript TypeScript

Runner operating systems

Windows macOS Linux

Target operating systems

Windows macOS Linux iOS Android

Browser engines

Chromium Firefox WebKit

Browsers

Chrome Edge Firefox Safari

Device modes

Responsive viewport

What it tests

Product kind

Testing platform, AI testing agent

Testing types

End-to-end, Functional, Regression, API, Visual

Targets

Web app

Use cases

Pull request validation, Regression testing, Release gating, Test maintenance, Test generation

Classification lists positively established capabilities. Absence from a list does not mean lack of support.

Creation and execution

Authoring methods

Code, Recorder, Natural language, AI-generated code, AI-generated workflow, Imported tests

Execution models

Browser DOM, Browser protocol, Computer vision, OS input

Deployment

SaaS, Self-hosted

License

Proprietary

Capabilities

Maintenance, reliability, and debugging

Setup difficulty

Low

Maintenance approaches

Reusable components, Resilient locators, Self-healing, Ai regeneration

Maximum concurrency

100

Debug artifacts

Screenshot, Video, Trace, Console log, Network log

Reliability mechanisms

Auto wait, Retry

Interfaces

CLI, Web UI, API, SDK

Pricing

Security and deployment

Certifications

None recorded

Data regions

Unknown

Data retention

Unknown

Customer data used for training

Unknown

Support

Channels

Docs, Chat, Email, Dedicated engineer

Support SLA

Available

Related pages

• AI Testing Tools
• Testing Tools with GitHub Integrations
• Testing Tools with SDKs
• Self-Hosted Testing Tools
• Top 24 AI Testing Tools for Developers
• Top 26 AI Testing Tools for QA Engineers
• Top 16 AI Testing Tools for SDETs
• Top 22 AI Testing Tools for Chrome
• Top 17 AI Testing Tools for Edge
• Top 18 AI Testing Tools for Firefox
• Top 18 AI Testing Tools for Safari
• Top 16 AI Testing Tools for JavaScript
• Top 12 AI Testing Tools for TypeScript
• Top 17 AI Testing Tools for Windows
• Top 15 AI Testing Tools for macOS
• Top 16 AI Testing Tools for Linux
• Top 20 AI Testing Tools for iOS
• Top 20 AI Testing Tools for Android
• Top 20 AI Testing Tools That Run on Windows
• Top 19 AI Testing Tools That Run on macOS
• Top 21 AI Testing Tools That Run on Linux
• Top 13 AI Testing Tools for Responsive Viewports
• Stably alternatives

Sources and verification

1. 1Stably · Official website · Stably · retrieved 2026-09-26

   Supports 16 claims · Vendor documented, high confidence · verified 2026-09-26

   • AI generates code only
   • Audience
   • Authoring method
   • Code authoring
   • Languages
   • Natural language authoring
   • Product status
   • Recorder
   • Runner OS
   • Summary
   • Targets
   • Testing types
   • Tool
   • Use cases
   • Uses AI
   • Vendor

   Stably generates Playwright code.

   heading 6: One shared testing system for QA, PM, and Engineering

   heading 7: Natural language or recording | heading 1: Create Tests (stably create) | list item: Import Existing Tests

   Stably is 100% Playwright-compatible, allowing engineers to edit selectors, assertions, and retries directly in Playwright code.

   chars 819-829: Write tests in plain English. Stably turns them into reliable Playwright, runs them in CI, and auto-updates tests as your product evolves. | chars 2404-2414: Stably is 100% 🎭 Playwright-compatible: keep your playwright.config.*, fixtures, locators, and CLI habits while layering in AI assertions, actions, and self-healing.

   heading 1: Stably

   chars 697-720: macOS · Windows · Linux

   heading 3: Get 80%80% test coveragein minutes, not months

   heading 2: The agentic IDEfor parallel coding agents.

   list item: AI Assertions: Use natural language to verify visual and functional states | list item: Network: Request interception, mocking, and API testing | chars 819-829: Write tests in plain English. Stably turns them into reliable Playwright, runs them in CI, and auto-updates tests as your product evolves.

   heading 4: From first draft to dependable release checks | chars 3998-4091: Stably proposes updates for test drift and flags likely real product bugs for engineer review. | heading 1: Stably GitHub Action

2. 2Stably - AI-native Testing Platform · Official docs · Stably · retrieved 2026-09-26

   Supports 41 claims · Vendor documented, high confidence · verified 2026-09-26

   • API assertions
   • Auto-waiting
   • Automatic retries
   • Browser engines
   • Browser extension testing
   • Browsers
   • Canvas testing
   • Console logs
   • Cross-browser testing
   • Cross-platform testing
   • Dark and light mode testing
   • Database assertions
   • Debug artifacts
   • Device modes
   • Email testing
   • Execution model
   • Execution traces
   • Failure grouping
   • File download testing
   • File upload testing
   • iframe testing
   • Multi-tab testing
   • Native desktop testing
   • Native mobile testing
   • Network logs
   • Network mocking
   • Notification testing
   • OAuth testing
   • Parameterized tests
   • PDF validation
   • Performance measurement
   • Real device testing
   • Replay
   • Reusable steps
   • Screenshots
   • Spelling and grammar checks
   • Target OS
   • Testing types
   • Uses AI
   • Video content validation
   • Video recording

   heading 1: Documentation Index

   chars 2287-2350: The Stably Web Editor supports most capabilities that Playwright provides, with a few limitations.

   list item: Selectors: CSS selectors, text selectors, XPath, and more Actions: Click, fill, hover, drag-and-drop, keyboard input, and other interactions Assertions: Visibility checks, text content, element states, and more Navigation: Page navigation, URL handling, and browser history Network: Request inter | heading 1: AI Assertions

   Implied by Playwright compatibility.

   list item: AI Assertions: Use natural language to verify visual and functional states | list item: Network: Request interception, mocking, and API testing | chars 819-829: Write tests in plain English. Stably turns them into reliable Playwright, runs them in CI, and auto-updates tests as your product evolves.

3. 3Stably - AI-native Testing Platform · Official docs · Stably · retrieved 2026-09-26

   Supports 9 claims · Vendor documented, high confidence · verified 2026-09-26

   • Deployment
   • Interfaces
   • Maintenance approach
   • MCP server
   • Product kind
   • Reliability mechanisms
   • SDK
   • Setup difficulty
   • VS Code extension

   link 17: Stably Cloud Runner | link 15: Stably CLI

   heading 1: Documentation Index

4. 4Pricing - AI-powered QA Automation | Start Free - Stably · Official pricing · Stably · retrieved 2026-09-26

   Supports 22 claims · Vendor documented, high confidence · verified 2026-09-26

   • Audit logs
   • Certifications
   • Company size
   • Configurable retention
   • Customer data used for training
   • Data regions
   • Data residency
   • Free tier
   • License
   • License identifiers
   • Max concurrency
   • Pricing
   • Pricing models
   • Private runners
   • RBAC
   • SCIM
   • SSO (OIDC)
   • SSO (SAML)
   • Support channels
   • Support SLA
   • Training opt-out
   • Trial

   heading 1: Flexible pricing

   section: Hobby: Hobby Try AI testing with no commitment. Perfect for side projects. | section: Team: Team For small teams ready to ship with confidence. | section: Growth: Growth Most popular For growing teams with demanding test suites. | section: Enterprise: Enterprise Volume discounts for teams spending over $1k/month.

5. 5Stably - AI-native Testing Platform · Official docs · Stably · retrieved 2026-09-26

   Supports 11 claims · Vendor documented, high confidence · verified 2026-09-26

   • Autonomous PR validation
   • CI execution
   • GitHub
   • GitHub PR checks
   • Integrations
   • Merge gating
   • PR comments
   • PR-aware test selection
   • Preview deployment testing
   • Scheduled execution
   • Use cases

   heading 1: Stably GitHub Action

   heading 4: From first draft to dependable release checks | chars 3998-4091: Stably proposes updates for test drift and flags likely real product bugs for engineer review. | heading 1: Stably GitHub Action

6. 6Stably - AI-native Testing Platform · Official docs · Stably · retrieved 2026-09-26

   Supports 4 claims · Vendor documented, high confidence · verified 2026-09-26

   • Code authoring
   • Languages
   • SDK
   • Uses AI

   Stably is 100% Playwright-compatible, allowing engineers to edit selectors, assertions, and retries directly in Playwright code.

   chars 819-829: Write tests in plain English. Stably turns them into reliable Playwright, runs them in CI, and auto-updates tests as your product evolves. | chars 2404-2414: Stably is 100% 🎭 Playwright-compatible: keep your playwright.config.*, fixtures, locators, and CLI habits while layering in AI assertions, actions, and self-healing.

7. 7Stably - AI-native Testing Platform · Official docs · Stably · retrieved 2026-09-26

   Supports 5 claims · Vendor documented, high confidence · verified 2026-09-26

   • Accessibility checks
   • Execution model
   • Semantic visual assertions
   • Vision-based interaction
   • Visual regression

   list item: Selectors: CSS selectors, text selectors, XPath, and more Actions: Click, fill, hover, drag-and-drop, keyboard input, and other interactions Assertions: Visibility checks, text content, element states, and more Navigation: Page navigation, URL handling, and browser history Network: Request inter | heading 1: AI Assertions

   Supported via AI Assertions.

8. 8Stably - AI-native Testing Platform · Official docs · Stably · retrieved 2026-09-26

   Supports 3 claims · Vendor documented, high confidence · verified 2026-09-26

   • AI test generation
   • Authoring method
   • Autonomous exploration

   Supported via `stably create` CLI command and Web Editor.

   heading 7: Natural language or recording | heading 1: Create Tests (stably create) | list item: Import Existing Tests

   Supported via `stably plan` and `stably create` commands.

9. 9Stably - AI-native Testing Platform · Official docs · Stably · retrieved 2026-09-26

   Supports 6 claims · Vendor documented, high confidence · verified 2026-09-26

   • AI test generation
   • Authoring method
   • Interactive debugging
   • Natural language authoring
   • Recorder
   • Test import

   Supported via `stably create` CLI command and Web Editor.

   heading 7: Natural language or recording | heading 1: Create Tests (stably create) | list item: Import Existing Tests

   Existing Playwright tests can be imported.

10. 10Stably - AI-native Testing Platform · Official docs · Stably · retrieved 2026-09-26

    Supports 1 claim · verified 2026-09-26

    • Test data generation

    Supported via AI Extraction.

11. 11Stably - AI-native Testing Platform · Official docs · Stably · retrieved 2026-09-26

    Supports 1 claim · verified 2026-09-26

    • AI executes the app

    Supported via AI Agent Execute.

12. 12Stably - AI-native Testing Platform · Official docs · Stably · retrieved 2026-09-26

    Supports 1 claim · verified 2026-09-26

    • Autonomous exploration

    Supported via `stably plan` and `stably create` commands.

13. 13Stably - AI-native Testing Platform · Official docs · Stably · retrieved 2026-09-26

    Supports 3 claims · verified 2026-09-26

    • Adapts to UI changes
    • Selector-free execution
    • Self-healing

    Supported via AI Locator (autofix).

    Supported via AI Locator.

    Supported via AI Locator and `stably fix` command.

14. 14Stably - AI-native Testing Platform · Official docs · Stably · retrieved 2026-09-26

    Supports 2 claims · verified 2026-09-26

    • AI failure analysis
    • Self-healing

    Supported via `stably fix` and Test Reporter.

    Supported via AI Locator and `stably fix` command.

15. 15Stably - AI-native Testing Platform · Official docs · Stably · retrieved 2026-09-26

    Supports 1 claim · verified 2026-09-26

    • AI failure analysis

    Supported via `stably fix` and Test Reporter.

16. 16Stably - AI-native Testing Platform · Official docs · Stably · retrieved 2026-09-26

    Supports 9 claims · verified 2026-09-26

    • Headed execution
    • Headless execution
    • Local execution
    • On-premises deployment
    • Parallel execution
    • Private network access
    • Secrets injection
    • Secrets management
    • Test sharding

Hands-on tested: no (documentation research only) · Content updated 2026-09-26