Checksum vs Stably: Testing Tool Comparison

Checksum 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.

  • TypeScript
checksum-test-example TypeScript Example of a generated test using the Checksum runtime Not run
Package:
@checksum-ai/runtime (version not recorded)
import { init } from "@checksum-ai/runtime";

const { test, defineChecksumTest, login, expect, checksumAI } = init();

test(
  defineChecksumTest("User Can Create Opportunity", "OFJlm"),
  async ({ page, vs }) => {
    // Step 1: Navigate to Opportunities
    await page.goto("/opportunities");
    await expect(page.getByRole("heading", { name: "Opportunities" })).toBeVisible();

    // Step 2: Create New Opportunity
    await page.getByRole("button", { name: "New Opportunity" }).click();
    await page.getByLabel("Contact").fill("John Doe");

    // Step 3: Save and Confirm
    await page.getByRole("button", { name: "Save" }).click();
    await expect(page.getByText("John Doe")).toBeVisible();
  }
);

Official docs

Stably: no approved SDK sample.
Unknown means no documentation was found; it is not the same as unsupported.
FieldScreenshot of the Checksum homepage ChecksumScreenshot of the Stably homepage Stably
Identity
CategoryTestingTesting
VendorChecksumStably
Product statusactiveactive
SummaryChecksum is an AI-powered end-to-end testing platform that generates, maintains, and auto-heals Playwright and API tests.Stably is an AI-native testing platform that provides an agentic IDE for parallel coding agents to get test coverage quickly.
Product kindTesting platform, AI testing agentTesting platform, AI testing agent
AI
Uses AI
Supported
Verified 2026-09-26[5][11][12]
Supported
Test generation, Execution, Self-healing, Exploration, Failure analysis, Test data generation
Verified 2026-09-26[1][2][6]
AI test generation
Supported
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
Null
Verified 2026-09-26[7]
Supported
Supported via AI Agent Execute.
Verified 2026-09-26[11]
AI generates code only
Supported
Verified 2026-09-26[7]
Supported
Stably generates Playwright code.
Verified 2026-09-26[1]
Autonomous exploration
Supported
Verified 2026-09-26[10]
Supported
Supported via `stably plan` and `stably create` commands.
Verified 2026-09-26[12][8]
Vision-based interaction
Unknown
Verified 2026-09-26[2]
Supported
Supported via AI Assertions.
Verified 2026-09-26[7]
Selector-free execution
Unsupported
Null
Verified 2026-09-26[7]
Supported
Supported via AI Locator.
Verified 2026-09-26[13]
Adapts to UI changes
Supported
Verified 2026-09-26[11]
Supported
Supported via AI Locator (autofix).
Verified 2026-09-26[13]
Self-healing
Supported
Verified 2026-09-26[11][13]
Supported
Supported via AI Locator and `stably fix` command.
Verified 2026-09-26[13][14]
AI failure analysis
Supported
Verified 2026-09-26[11]
Supported
Supported via `stably fix` and Test Reporter.
Verified 2026-09-26[14][15]
What it tests
Testing typesEnd-to-end, API, RegressionEnd-to-end, Functional, Regression, API, Visual
TargetsWeb app, APIWeb app
Native desktop testing
Unknown
Verified 2026-09-26[2]
Unsupported
Verified 2026-09-26[2]
Native mobile testing
Unknown
Verified 2026-09-26[2]
Unsupported
Verified 2026-09-26[2]
Browser extension testing
Unknown
Verified 2026-09-26[2]
Unknown
Verified 2026-09-26[2]
Cross-browser testing
Supported
Verified 2026-09-26[7]
Supported
Verified 2026-09-26[2]
Cross-platform testing
Supported
Verified 2026-09-26[7]
Supported
Verified 2026-09-26[2]
Real device testing
Unknown
Verified 2026-09-26[2]
Unknown
Verified 2026-09-26[2]
Multi-tab testing
Unknown
Verified 2026-09-26[2]
Supported
Verified 2026-09-26[2]
iframe testing
Unknown
Verified 2026-09-26[2]
Supported
Verified 2026-09-26[2]
Canvas testing
Unknown
Verified 2026-09-26[2]
Supported
Verified 2026-09-26[2]
PDF validation
Unknown
Verified 2026-09-26[2]
Unknown
Verified 2026-09-26[2]
File upload testing
Unknown
Verified 2026-09-26[2]
Supported
Verified 2026-09-26[2]
File download testing
Unknown
Verified 2026-09-26[2]
Supported
Verified 2026-09-26[2]
OAuth testing
Unknown
Verified 2026-09-26[2]
Unknown
Verified 2026-09-26[2]
Email testing
Unknown
Verified 2026-09-26[2]
Supported
Verified 2026-09-26[2]
Notification testing
Unknown
Verified 2026-09-26[2]
Unknown
Verified 2026-09-26[2]
Video content validation
Unknown
Verified 2026-09-26[2]
Unknown
Verified 2026-09-26[2]
Developer integrations
MCP server
Supported
Verified 2026-09-26[14]
Unknown
Verified 2026-09-26[3]
VS Code extension
Unknown
Verified 2026-09-26[15]
Unknown
Verified 2026-09-26[3]
SDK
Supported
Verified 2026-09-26[7]
Supported
Official · TypeScript
Verified 2026-09-26[3][6]
PR workflow
GitHub
Supported
Verified 2026-09-26[16][5]
Supported
GitHub Action, Check runs, Commit statuses · Integration
Verified 2026-09-26[5]
CI execution
Supported
Verified 2026-09-26[18]
Supported
Verified 2026-09-26[5]
GitHub PR checks
Supported
Verified 2026-09-26[18]
Supported
Integration
Verified 2026-09-26[5]
PR-aware test selection
Supported
Verified 2026-09-26[8]
Unknown
Verified 2026-09-26[5]
Autonomous PR validation
Supported
Verified 2026-09-26[5]
Supported
Verified 2026-09-26[5]
PR comments
Supported
Verified 2026-09-26[9]
Unknown
Verified 2026-09-26[5]
Preview deployment testing
Supported
Verified 2026-09-26[18]
Supported
Verified 2026-09-26[5]
Merge gating
Supported
Verified 2026-09-26[18]
Unknown
Verified 2026-09-26[5]
Scheduled execution
Supported
Verified 2026-09-26[19]
Supported
Verified 2026-09-26[5]
Pricing
Pricing
Unknown
Free
Pricing modelsSubscriptionFree, Subscription, Usage-based, Per parallel session, Custom, Mixed
Free tierUnavailableAvailable
TrialUnknownUnknown
Deployment
DeploymentSaaSSaaS, Self-hosted
LicenseProprietaryProprietary
License identifiersNot researchedNot researched
Compatibility
LanguagesTypeScriptJavaScript, 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 modesResponsive viewportResponsive viewport
Creation and execution
Execution modelBrowser protocol, Http clientBrowser DOM, Browser protocol, Computer vision, OS input
Authoring methodAI-generated code, Natural language, Code, Autonomous explorationCode, Recorder, Natural language, AI-generated code, AI-generated workflow, Imported tests
Code authoring
Supported
Verified 2026-09-26[7]
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
Unknown
Verified 2026-09-26[2]
Supported
Verified 2026-09-26[1][9]
Natural language authoring
Supported
Verified 2026-09-26[9]
Supported
Verified 2026-09-26[1][9]
Test import
Unknown
Verified 2026-09-26[2]
Supported
Existing Playwright tests can be imported.
Verified 2026-09-26[9]
Reusable steps
Supported
Verified 2026-09-26[7]
Supported
Implied by Playwright compatibility.
Verified 2026-09-26[2]
Parameterized tests
Unknown
Verified 2026-09-26[2]
Supported
Implied by Playwright compatibility.
Verified 2026-09-26[2]
Test data generation
Unknown
Verified 2026-09-26[2]
Supported
Supported via AI Extraction.
Verified 2026-09-26[10]
Fit
AudienceDevelopers, QA engineers, SDETDevelopers, QA engineers, SDET
Company sizeStartup, SMB, Mid-market, EnterpriseSolo, Startup, SMB, Mid-market, Enterprise
Use casesPull request validation, Regression testing, Test maintenance, Test generationPull request validation, Regression testing, Release gating, Test maintenance, Test generation
Validation
Visual regression
Unknown
Verified 2026-09-26[2]
Supported
Verified 2026-09-26[7]
Semantic visual assertions
Unknown
Verified 2026-09-26[2]
Supported
Verified 2026-09-26[7]
Accessibility checks
Unknown
Verified 2026-09-26[2]
Unknown
Verified 2026-09-26[7]
API assertions
Supported
Verified 2026-09-26[3]
Supported
Verified 2026-09-26[2]
Database assertions
Unknown
Verified 2026-09-26[2]
Unknown
Verified 2026-09-26[2]
Spelling and grammar checks
Unknown
Verified 2026-09-26[2]
Unknown
Verified 2026-09-26[2]
Dark and light mode testing
Unknown
Verified 2026-09-26[2]
Unknown
Verified 2026-09-26[2]
Performance measurement
Unknown
Verified 2026-09-26[2]
Unknown
Verified 2026-09-26[2]
Running
Local execution
Supported
Verified 2026-09-26[8]
Supported
Verified 2026-09-26[16]
Headless execution
Supported
Verified 2026-09-26[7]
Supported
Verified 2026-09-26[16]
Headed execution
Supported
Verified 2026-09-26[7]
Supported
Verified 2026-09-26[16]
Parallel execution
Supported
Verified 2026-09-26[18]
Supported
Verified 2026-09-26[16]
Test sharding
Supported
Verified 2026-09-26[18]
Supported
Verified 2026-09-26[16]
Auto-waiting
Supported
Verified 2026-09-26[7]
Supported
Verified 2026-09-26[2]
Automatic retries
Supported
Verified 2026-09-26[7][13]
Supported
Verified 2026-09-26[2]
Network mocking
Unknown
Verified 2026-09-26[2]
Supported
Verified 2026-09-26[2]
Secrets injection
Supported
Verified 2026-09-26[20]
Supported
Verified 2026-09-26[16]
Private network access
Unknown
Verified 2026-09-26[2]
Unknown
Verified 2026-09-26[16]
Diagnosis
Screenshots
Unknown
Verified 2026-09-26[2]
Supported
Verified 2026-09-26[2]
Video recording
Unknown
Verified 2026-09-26[2]
Supported
Verified 2026-09-26[2]
Execution traces
Supported
Verified 2026-09-26[9]
Supported
Verified 2026-09-26[2]
Console logs
Unknown
Verified 2026-09-26[2]
Supported
Verified 2026-09-26[2]
Network logs
Unknown
Verified 2026-09-26[2]
Supported
Verified 2026-09-26[2]
Replay
Unknown
Verified 2026-09-26[2]
Unknown
Verified 2026-09-26[2]
Interactive debugging
Unknown
Verified 2026-09-26[2]
Supported
Verified 2026-09-26[9]
Failure grouping
Supported
Verified 2026-09-26[12]
Unknown
Verified 2026-09-26[2]
Debug artifactsTrace, Html reportScreenshot, Video, Trace, Console log, Network log
Enterprise
SSO (SAML)
Unknown
Verified 2026-09-26[21]
Supported
Verified 2026-09-26[4]
SSO (OIDC)
Supported
Verified 2026-09-26[21]
Unknown
Verified 2026-09-26[4]
SCIM
Unknown
Verified 2026-09-26[21]
Unknown
Verified 2026-09-26[4]
RBAC
Unknown
Verified 2026-09-26[21]
Unknown
Verified 2026-09-26[4]
Audit logs
Unknown
Verified 2026-09-26[21]
Unknown
Verified 2026-09-26[4]
Secrets management
Supported
Verified 2026-09-26[20]
Supported
Verified 2026-09-26[16]
Configurable retention
Unknown
Verified 2026-09-26[21]
Unknown
Verified 2026-09-26[4]
Private runners
Supported
Verified 2026-09-26[18]
Unknown
Verified 2026-09-26[4]
On-premises deployment
Unsupported
Null
Verified 2026-09-26[2]
Supported
Verified 2026-09-26[16]
Data residency
Unknown
Verified 2026-09-26[21]
Unknown
Verified 2026-09-26[4]
Training opt-out
Unknown
Verified 2026-09-26[21]
Unknown
Verified 2026-09-26[4]
Operations
Setup difficultymediumlow
Maintenance approachSelf-healing, Ai regeneration, Manual codeReusable components, Resilient locators, Self-healing, Ai regeneration
Max concurrencynull100
Reliability mechanismsAuto wait, Retry, Self-healingAuto wait, Retry
InterfacesCLI, Web UI, MCPCLI, Web UI, API, SDK
Security
CertificationsNot researchedNot researched
Data regionsNot researchedNot researched
Customer data used for trainingNot researchedUnknown
Support
Support channelsDocsDocs, Chat, Email, Dedicated engineer
Support SLANot researchedYes
Integrations
IntegrationsSlack, GitHub, GitLab, Bitbucket, Azure DevOps, Rovo DevGitHub