Stably
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About
Stably is an AI-powered end-to-end testing platform that focuses on accelerating the creation and maintenance of browser-based automation. The tool's primary purpose is to help software teams achieve high test coverage without the traditionally high time investment associated with writing scripts manually. Users can generate tests by describing desired user paths in plain English or by recording their manual interactions in the browser. These inputs are then transformed into standard Playwright code, which can be integrated into existing development workflows and continuous integration environments. The platform features a sophisticated AI agent that handles both test creation and ongoing maintenance. When an application's UI changes, Stably identifies the "test drift" and proposes necessary adjustments to the code rather than simply failing the build. This self-healing mechanism is designed to distinguish between minor UI updates and genuine product bugs. In practice, the system provides detailed artifacts for every run, including screenshots, video recordings, and trace files, which assist engineers in diagnosing issues quickly when tests do fail. This reduces the time spent on manual debugging and maintenance loops. Stably is designed for cross-functional teams comprising software engineers, QA specialists, and product managers. It bridges the gap between technical and non-technical stakeholders through bidirectional synchronization; changes made in the visual cloud editor are pushed to the Git repository, and code changes are reflected back in the editor. This ensures that the entire team works from a single source of truth. It is particularly useful for organizations maintaining complex web applications that require frequent updates and high reliability in user-critical paths like checkout or account management. What distinguishes Stably from other AI testing solutions is its engineering-first philosophy. While it utilizes AI to automate repetitive tasks, it does not hide the underlying code in a proprietary format. Instead, it generates readable Playwright scripts that developers can modify or extend as needed. Furthermore, its credit-based pricing model offers transparency by charging based on specific usage metrics—browser minutes and AI tokens—rather than per user or per test case, allowing teams to scale their testing efforts in a cost-effective manner.
Pros & Cons
Converts natural language descriptions into standard Playwright code instantly.
Reduces test maintenance by automatically proposing fixes for UI element changes.
Provides 128 parallel executions on the Growth plan for rapid feedback.
Supports multiple AI models including Claude, GPT-4o, and Gemini for test generation.
Offers a free tier with $10 monthly credits for side projects and evaluation.
AI token costs can vary significantly from $0.30 to $15 per million based on the model chosen.
Full agent access and priority support are restricted to paid Team and Growth plans.
Enterprise features like SAML and SSO require a custom contract.
Users are responsible for ensuring regulatory compliance for the content they upload.
Use Cases
QA Engineers can automate the creation of complex E2E test suites by recording browser sessions and syncing them directly to Playwright code.
Product Managers can draft test intents in plain English to ensure new features meet acceptance criteria before engineering begins development.
DevOps teams can integrate Stably into CI/CD pipelines to catch critical regressions automatically with screenshots and video recordings for every run.
Engineering leads can use the bidirectional sync to maintain a single source of truth between the visual editor and the code repository.
Platform
Task
Features
• parallel test execution
• self-healing ai agents
• browser recordings and traces
• cli and ci/cd integration
• visual test editor
• localhost testing support
• bidirectional git sync
• plain english test builder
FAQs
Can I keep my existing Playwright workflow?
Yes, Stably is designed to integrate into your current setup. It generates reviewable Playwright code that lives in your Git repository, allowing engineers to maintain control while using AI for speed.
How does the credit-based pricing work?
Stably uses a transparent system where credits cover AI model tokens and browser execution time. Browser time costs $0.01 per minute, while AI token costs vary depending on the model used, such as GPT-4o or Claude.
Will Stably automatically change tests in my repository?
No, Stably does not make silent changes. It proposes updates for test drift or identifies product bugs, but these changes are reviewable in Git, ensuring that engineering remains the final authority.
Does Stably support testing on localhost?
Yes, the platform includes specific support for localhost testing, enabling developers to run AI-powered tests against their local environment before pushing code to production.
Can non-technical team members create tests?
Absolutely. Stably features a no-code visual editor and a plain-English test builder, allowing product managers and QA specialists to define flows without writing code.
Pricing Plans
Team
USD60.00 / per month• $60/month included credits
• Up to 8 parallel test executions
• Full agent access
• Priority support
• 14-day free trial
Growth
USD250.00 / per month• $250/month included credits
• Up to 128 parallel test executions
• Full agent access
• Dedicated support
Hobby
Free Plan• $10/month included credits
• 1 parallel test execution
• Basic agent access
• Pay-as-you-go afterwards
Job Opportunities
There are currently no job postings for this AI tool.
Ratings & Reviews
No ratings available yet. Be the first to rate this tool!
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