Selenium vs Stably: Testing Tool Comparison

Selenium and Stably side by side: verified capabilities, integrations, pricing, and limitations, each claim cited to an official source.

SDK examples

One documented example per tool where available.

  • Java
first-script-java Java Write your first Selenium script Not run
WebDriver driver = new ChromeDriver();
driver.get("https://www.selenium.dev/selenium/web/web-form.html");
driver.getTitle();
driver.manage().timeouts().implicitlyWait(Duration.ofMillis(500));
WebElement textBox = driver.findElement(By.name("my-text"));
WebElement submitButton = driver.findElement(By.cssSelector("button"));
textBox.sendKeys("Selenium");
submitButton.click();
WebElement message = driver.findElement(By.id("message"));
message.getText();
driver.quit();

Official docs

Stably: no approved SDK sample.
Unknown means no documentation was found; it is not the same as unsupported.
FieldScreenshot of the Selenium homepage SeleniumScreenshot of the Stably homepage Stably
Identity
CategoryTestingTesting
VendorSelenium projectStably
Product statusactiveactive
SummarySelenium is an umbrella project encapsulating a variety of tools and libraries that enable and support the automation of web browsers.Stably is an AI-native testing platform that provides an agentic IDE for parallel coding agents to get test coverage quickly.
Product kindFrameworkTesting platform, AI testing agent
AI
Uses AI
Unsupported
Selenium itself does not use AI, but there are community AI solutions built on top of it.
Verified 2026-09-26[5]
Supported
Test generation, Execution, Self-healing, Exploration, Failure analysis, Test data generation
Verified 2026-09-26[1][2][6]
AI test generation
Unsupported
Verified 2026-09-26[5]
Supported
Supported via `stably create` CLI command and Web Editor.
Verified 2026-09-26[8][9]
AI executes the app
Unsupported
Verified 2026-09-26[5]
Supported
Supported via AI Agent Execute.
Verified 2026-09-26[11]
AI generates code only
Unsupported
Verified 2026-09-26[5]
Supported
Stably generates Playwright code.
Verified 2026-09-26[1]
Autonomous exploration
Unsupported
Verified 2026-09-26[5]
Supported
Supported via `stably plan` and `stably create` commands.
Verified 2026-09-26[12][8]
Vision-based interaction
Unsupported
Verified 2026-09-26[5]
Supported
Supported via AI Assertions.
Verified 2026-09-26[7]
Selector-free execution
Unsupported
Verified 2026-09-26[5]
Supported
Supported via AI Locator.
Verified 2026-09-26[13]
Adapts to UI changes
Unsupported
Verified 2026-09-26[5]
Supported
Supported via AI Locator (autofix).
Verified 2026-09-26[13]
Self-healing
Unsupported
Verified 2026-09-26[5]
Supported
Supported via AI Locator and `stably fix` command.
Verified 2026-09-26[13][14]
AI failure analysis
Unsupported
Verified 2026-09-26[5]
Supported
Supported via `stably fix` and Test Reporter.
Verified 2026-09-26[14][15]
What it tests
Testing typesEnd-to-end, FunctionalEnd-to-end, Functional, Regression, API, Visual
TargetsWeb appWeb app
Native desktop testing
Unsupported
Verified 2026-09-26[1]
Unsupported
Verified 2026-09-26[2]
Native mobile testing
Unsupported
Verified 2026-09-26[1]
Unsupported
Verified 2026-09-26[2]
Browser extension testing
Supported
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[2]
Cross-browser testing
Supported
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[2]
Cross-platform testing
Supported
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[2]
Real device testing
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[2]
Multi-tab testing
Supported
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[2]
iframe testing
Supported
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[2]
Canvas testing
Unknown
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[2]
PDF validation
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[2]
File upload testing
Supported
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[2]
File download testing
Unsupported
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[2]
OAuth testing
Unsupported
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[2]
Email testing
Unsupported
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[2]
Notification testing
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[2]
Video content validation
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[2]
Developer integrations
MCP server
Supported
Community · Integration
Community implementation by Angie Jones.
Verified 2026-09-26[5]
Unknown
Verified 2026-09-26[3]
VS Code extension
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[3]
SDK
Supported
Official · Java, Python, C#, Ruby, JavaScript
Verified 2026-09-26[2]
Supported
Official · TypeScript
Verified 2026-09-26[3][6]
PR workflow
GitHub
Unknown
Verified 2026-09-26[1]
Supported
GitHub Action, Check runs, Commit statuses · Integration
Verified 2026-09-26[5]
CI execution
Supported
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[5]
GitHub PR checks
Unknown
Verified 2026-09-26[1]
Supported
Integration
Verified 2026-09-26[5]
PR-aware test selection
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[5]
Autonomous PR validation
Unknown
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[5]
PR comments
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[5]
Preview deployment testing
Unknown
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[5]
Merge gating
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[5]
Scheduled execution
Unknown
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[5]
Pricing
Pricing
Free
Free
Pricing modelsFreeFree, Subscription, Usage-based, Per parallel session, Custom, Mixed
Free tierAvailableAvailable
TrialNot applicableUnknown
Deployment
DeploymentLocal, Self-hostedSaaS, Self-hosted
LicenseOpen sourceProprietary
License identifiersApache 2.0Not researched
Compatibility
LanguagesJavaScript, Python, Java, C#, RubyJavaScript, TypeScript
Runner OSWindows, macOS, LinuxWindows, macOS, Linux
Target OSWindows, macOS, LinuxWindows, macOS, Linux, iOS, Android
Browser enginesChromium, Firefox, WebKitChromium, Firefox, WebKit
BrowsersChrome, Edge, Firefox, SafariChrome, Edge, Firefox, Safari
Device modesReal device, Emulator, SimulatorResponsive viewport
Creation and execution
Execution modelBrowser protocolBrowser DOM, Browser protocol, Computer vision, OS input
Authoring methodCode, RecorderCode, Recorder, Natural language, AI-generated code, AI-generated workflow, Imported tests
Code authoring
Supported
Verified 2026-09-26[1]
Supported
Stably is 100% Playwright-compatible, allowing engineers to edit selectors, assertions, and retries directly in Playwright code.
Verified 2026-09-26[1][6]
Recorder
Supported
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[1][9]
Natural language authoring
Unsupported
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[1][9]
Test import
Unknown
Verified 2026-09-26[1]
Supported
Existing Playwright tests can be imported.
Verified 2026-09-26[9]
Reusable steps
Unknown
Verified 2026-09-26[1]
Supported
Implied by Playwright compatibility.
Verified 2026-09-26[2]
Parameterized tests
Unknown
Verified 2026-09-26[1]
Supported
Implied by Playwright compatibility.
Verified 2026-09-26[2]
Test data generation
Unsupported
Verified 2026-09-26[1]
Supported
Supported via AI Extraction.
Verified 2026-09-26[10]
Fit
AudienceDevelopers, QA engineers, SDETDevelopers, QA engineers, SDET
Company sizeSolo, Startup, SMB, Mid-market, EnterpriseSolo, Startup, SMB, Mid-market, Enterprise
Use casesRegression testing, Cross browser testingPull request validation, Regression testing, Release gating, Test maintenance, Test generation
Validation
Visual regression
Unknown
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[7]
Semantic visual assertions
Unknown
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[7]
Accessibility checks
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[7]
API assertions
Unknown
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[2]
Database assertions
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[2]
Spelling and grammar checks
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[2]
Dark and light mode testing
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[2]
Performance measurement
Unsupported
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[2]
Running
Local execution
Supported
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[16]
Headless execution
Supported
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[16]
Headed execution
Supported
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[16]
Parallel execution
Supported
Verified 2026-09-26[3][1]
Supported
Verified 2026-09-26[16]
Test sharding
Unknown
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[16]
Auto-waiting
Supported
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[2]
Automatic retries
Unknown
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[2]
Network mocking
Supported
Verified 2026-09-26[9][1]
Supported
Verified 2026-09-26[2]
Secrets injection
Unknown
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[16]
Private network access
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[16]
Diagnosis
Screenshots
Supported
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[2]
Video recording
Unknown
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[2]
Execution traces
Unknown
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[2]
Console logs
Supported
Verified 2026-09-26[9][1]
Supported
Verified 2026-09-26[2]
Network logs
Supported
Verified 2026-09-26[9][1]
Supported
Verified 2026-09-26[2]
Replay
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[2]
Interactive debugging
Unknown
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[9]
Failure grouping
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[2]
Debug artifactsScreenshot, Console log, Network logScreenshot, Video, Trace, Console log, Network log
Enterprise
SSO (SAML)
Unknown
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[4]
SSO (OIDC)
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[4]
SCIM
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[4]
RBAC
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[4]
Audit logs
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[4]
Secrets management
Unknown
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[16]
Configurable retention
Unknown
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[4]
Private runners
Supported
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[4]
On-premises deployment
Supported
Verified 2026-09-26[1]
Supported
Verified 2026-09-26[16]
Data residency
Not applicable
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[4]
Training opt-out
Not applicable
Verified 2026-09-26[1]
Unknown
Verified 2026-09-26[4]
Operations
Setup difficultymediumlow
Maintenance approachManual codeReusable components, Resilient locators, Self-healing, Ai regeneration
Max concurrencynull100
Reliability mechanismsAuto waitAuto wait, Retry
InterfacesAPI, SDK, MCPCLI, Web UI, API, SDK
Security
CertificationsNot researchedNot researched
Data regionsNot researchedNot researched
Customer data used for trainingNot researchedUnknown
Support
Support channelsDocs, Github issuesDocs, Chat, Email, Dedicated engineer
Support SLANot researchedYes
Integrations
IntegrationsNot researchedGitHub