Checksum.ai vs. Stably Comparison


Checksum.ai	Stably	+	+
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About Checksum is a continuous quality platform that autonomously generates, runs, and maintains tests so engineering teams can ship AI-generated code without trading speed for reliability. Unlike copilots that wait for prompts, Checksum works as a background agent, detecting what needs testing, generating production-ready Playwright, and healing broken tests automatically. Seventy percent of failures resolve autonomously, keeping suites green without manual effort. Built on fine-tuned data from 1.5+ million test runs, Checksum covers every layer of the SDLC: end-to-end, API, and CI testing from a single platform. Tests are delivered as standard Playwright code, submitted as a PR to your repo. No vendor lock-in. Checksum integrates natively with Cursor, Claude Code, and 100+ coding agents via /checksum slash commands, so code is tested before a human ever reviews it. AI handles generation and healing on Checksum's cloud: no LLM tokens. The result: ship faster, with confidence.		About Stably is an AI-assisted browser and end-to-end testing platform for software teams. Users describe customer workflows in plain language or record them, then create reviewable Playwright tests and run them in Stably Cloud or their existing CI pipeline. The platform provides test planning, browser execution, screenshots, video replays, and trace data to help teams inspect results and investigate failures. It can identify test drift and propose repairs as web interfaces change, with updates reviewed through Git pull requests rather than applied silently. Stably supports QA professionals, product managers, and engineers who need to create, execute, and maintain browser-based checks for web applications, including release regression, checkout, authentication, forms, and other multi-step user journeys. Teams can connect test coverage to repositories, Jira tickets, and product documentation, and use Playwright code within familiar development workflows.
Platforms Supported Windows Not Supported Mac Not Supported Linux Not Supported Cloud Supported On-Premises Not Supported iPhone Not Supported iPad Not Supported Android Not Supported Chromebook Not Supported		Platforms Supported Windows Not Supported Mac Not Supported Linux Not Supported Cloud Supported On-Premises Not Supported iPhone Not Supported iPad Not Supported Android Not Supported Chromebook Not Supported
Audience Software development teams seeking a solution to improve product quality and speed up release cycles		Audience QA professionals, product managers, and software engineers who create, run, and maintain browser-based tests for web applications.
Support Phone Support Supported 24/7 Live Support Not Supported Online Supported		Support Phone Support Not Supported 24/7 Live Support Not Supported Online Not Supported
API Offers API Not Supported		API Offers API Not Supported
Screenshots and Videos View more images or videos		Screenshots and Videos No images available
Pricing Based on tests maintained. Unlimited test runs. Unlimited auto-healings. Unlimited users. Pricing based on the number of tests maintained. Free Version Not Supported Free Trial Supported		Pricing $0/month Hobby is $0/month and includes $10 in monthly credits; additional usage is pay-as-you-go. Team is $60/month with $60 in monthly credits, and Growth is $250/month with $250 in monthly credits. Credits cover AI and browser usage. Browser time is $0.01/minute; AI token rates vary by model ($0.30–$15 per million tokens). Enterprise pricing is custom. Listed plans can be canceled anytime. Free Version Supported Free Trial Not Supported
Reviews/Ratings Read all reviews		Reviews/Ratings Overall 0.0 / 5 ease 0.0 / 5 features 0.0 / 5 design 0.0 / 5 support 0.0 / 5 This software hasn't been reviewed yet. Be the first to provide a review: Review this Software

Training Documentation Supported Webinars Supported Live Online Supported In Person Supported		Training Documentation Not Supported Webinars Not Supported Live Online Not Supported In Person Not Supported
Company Information Checksum.ai United States checksum.ai/		Company Information Stably www.stably.ai/
Alternatives MuukTest		Alternatives No Alternatives
Zerocheck
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Categories AI Agents Supported AI Agents for Software Testing Supported AI Testing Tools Supported API Testing Supported Automated Testing Supported Codeless Test Automation Supported Continuous Testing Supported Cross-Browser Testing Supported Functional Testing Supported QA Testing Supported Regression Testing Supported Software Testing Supported		Categories QA Testing Supported
Show More Features API Testing Features Functional Testing Supported Fuzz Testing Not Supported Load Testing Not Supported Penetration Testing Not Supported Runtime and Error Detection Not Supported Security Testing Not Supported UI Testing Supported Validation Testing Supported
Integrations GitHub Supported Playwright Supported Azure OpenAI Service Supported CircleCI Supported Claude Supported Claude Code Supported Cursor Supported Discord Supported Gemini Supported GitLab Supported Google Chat Supported Groq Supported Jenkins Supported Jira Not Supported Microsoft Teams Supported OpenAI Supported Slack Supported Show More Integrations View All 16 Integrations		Integrations GitHub Supported Playwright Supported Azure OpenAI Service Not Supported CircleCI Not Supported Claude Not Supported Claude Code Not Supported Cursor Not Supported Discord Not Supported Gemini Not Supported GitLab Not Supported Google Chat Not Supported Groq Not Supported Jenkins Not Supported Jira Supported Microsoft Teams Not Supported OpenAI Not Supported Slack Not Supported Show More Integrations View All 3 Integrations
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