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Get 80% test coveragein minutes, not months

Write tests in plain English. Stably turns them into reliable Playwright, runs them in CI, and auto-updates tests as your product evolves.

“Before Stably, creating reliable tests took days. Now every new feature gets solid coverage before they ship.”

Ship with coverage

Use Stably where you already work

No workflow reset. Pick your path and go live quickly.

Best for QA, PM, and fast cross-functional onboarding

stably.ai

AI Test Builder

Describe the test you want to build in plain English.

Fill the onboard form for my tech startup

Test Steps

AI Generating...

1
Navigate to www.gusto.com
2
If you see a cookie consent dialog, dismiss it
3
Fill the onboard form for my tech startup
AI is adding steps

Browser Preview

stably.ai

Payroll Setup

Demo website completing the onboarding form automatically

Company Legal Name

Number of Employees

State

Plain English Prompt

Writing the test scenario...

Company Legal Name

Number of Employees

State

Use AI to draft faster. Use Stably to keep tests reliable over time.

From first draft to dependable release checks

PlanCreateRunautofix + review

Get started Documentation

>stably

?What would you like to do?› - Use arrow-keys. Return to submit.

› - Use arrow-keys. Return to submit.

❯Plan- Strategize testing coverage

Create- Generate new test suites

Run- Execute existing tests

Fix tests- Repair broken tests

Plan

Write test intent in plain English or import from docs and tickets.

Create

Generate Playwright coverage with explicit, reviewable test steps.

Run

Execute in cloud or your CI with screenshots, traces, and recordings.

Fix + Review

Stably proposes updates for test drift and flags likely real product bugs for engineer review.

Visual Editor

Build tests visually.
Keep engineering in control.

Start in Stably Cloud with plain-English steps or recording. Sync to Playwright code instantly, with reviewable changes in Git.

Editorapp.stably.ai/editor

Connected

Navigate to checkout...

Navigate to /shop

Click 'Add to Cart'

Fill 'Email' with test@example.com

Click 'Checkout'

Syncing to local...

localhost:3000/shop

Natural language or recording

Describe the flow or perform it directly; Stably captures stable, replayable steps.

Bidirectional sync

Cloud edits and repo code stay aligned so QA and engineering share one source of truth.

Take over anytime

Engineers can edit selectors, assertions, and retries directly in Playwright.

Proven accuracy. Proven stability.

See how Stably reduces false alarms and improves release confidence.

Lower false alarms = fewer release delays

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Enterprise Ready

One shared testing system for QA, PM, and Engineering

Bring test cases into one system, run them reliably at scale, and keep them aligned by connecting Jira, repos, and docs.

Talk to an expert Try Stably for free

Governance & Control

No silent test changes: updates are always reviewable.

Clear audit trail for every generated or repaired test.

Role-based controls for approvals and rollout.

Security and compliance readiness for enterprise teams.

“Stably helped us stop rerun loops and trust CI again.”
Before: noisy release checks. After: faster go/no-go decisions with clear artifacts.
Lucas Del Yerro
Senior Test Automation Engineer, Curebase

Don't take our word for it

See what QA leads, staff engineers, and heads of engineering say about Stably

Tom Alexander

Engineering Manager, ClickHouse

Stably is awesome!

Andrew Shield

Senior Engineer, Tofu

We actually enjoy writing tests with Stably — something I never thought I'd say. We're migrating all our Playwright tests over.

Gustavo Silva

CTO, Origin

We compared many AI QA tools. Stably is the one that actually works.

Tom Alexander

Engineering Manager, ClickHouse

Stably is awesome!

Andrew Shield

Senior Engineer, Tofu

We actually enjoy writing tests with Stably — something I never thought I'd say. We're migrating all our Playwright tests over.

Gustavo Silva

CTO, Origin

We compared many AI QA tools. Stably is the one that actually works.

Tom Alexander

Engineering Manager, ClickHouse

Stably is awesome!

Andrew Shield

Senior Engineer, Tofu

We actually enjoy writing tests with Stably — something I never thought I'd say. We're migrating all our Playwright tests over.

Gustavo Silva

CTO, Origin

We compared many AI QA tools. Stably is the one that actually works.

Tom Alexander

Engineering Manager, ClickHouse

Stably is awesome!

Andrew Shield

Senior Engineer, Tofu

We actually enjoy writing tests with Stably — something I never thought I'd say. We're migrating all our Playwright tests over.

Gustavo Silva

CTO, Origin

We compared many AI QA tools. Stably is the one that actually works.

Lucas Del Yerro

Senior Test Automation Engineer, Curebase

After comparing all AI testing solutions, Stably stands leagues ahead. Its ease of use and advanced handling of complex flows is unmatched in the market.

Siddhi Mittal

Co-founder, Yhangry

Best investment our team has made. Stably dramatically increased our user conversion rates by eliminating bugs.

Ben Kramer

CTO, Monterey

With Stably's tests in place, I'm confident our users won't encounter critical bugs anymore.

Lucas Del Yerro

Senior Test Automation Engineer, Curebase

After comparing all AI testing solutions, Stably stands leagues ahead. Its ease of use and advanced handling of complex flows is unmatched in the market.

Siddhi Mittal

Co-founder, Yhangry

Best investment our team has made. Stably dramatically increased our user conversion rates by eliminating bugs.

Ben Kramer

CTO, Monterey

With Stably's tests in place, I'm confident our users won't encounter critical bugs anymore.

Lucas Del Yerro

Senior Test Automation Engineer, Curebase

After comparing all AI testing solutions, Stably stands leagues ahead. Its ease of use and advanced handling of complex flows is unmatched in the market.

Siddhi Mittal

Co-founder, Yhangry

Best investment our team has made. Stably dramatically increased our user conversion rates by eliminating bugs.

Ben Kramer

CTO, Monterey

With Stably's tests in place, I'm confident our users won't encounter critical bugs anymore.

Lucas Del Yerro

Senior Test Automation Engineer, Curebase

After comparing all AI testing solutions, Stably stands leagues ahead. Its ease of use and advanced handling of complex flows is unmatched in the market.

Siddhi Mittal

Co-founder, Yhangry

Best investment our team has made. Stably dramatically increased our user conversion rates by eliminating bugs.

Ben Kramer

CTO, Monterey

With Stably's tests in place, I'm confident our users won't encounter critical bugs anymore.

Vikas Vair

CPO, OpenLayer

Stably's AI makes UI testing effortless while actually simulating real user flows. Our CI/CD pipeline has already caught several critical bugs that would have impacted users.

Shuangling Yin

CTO, InspectMind

Stably helps us catch bugs before production without manual testing or maintaining complex tests.

Mike Wang

CTO, Avina

Stably is a game-changer for us. It has transformed our testing process, enabling us to catch bugs before they reach production. Highly recommend!

Vikas Vair

CPO, OpenLayer

Stably's AI makes UI testing effortless while actually simulating real user flows. Our CI/CD pipeline has already caught several critical bugs that would have impacted users.

Shuangling Yin

CTO, InspectMind

Stably helps us catch bugs before production without manual testing or maintaining complex tests.

Mike Wang

CTO, Avina

Stably is a game-changer for us. It has transformed our testing process, enabling us to catch bugs before they reach production. Highly recommend!

Vikas Vair

CPO, OpenLayer

Stably's AI makes UI testing effortless while actually simulating real user flows. Our CI/CD pipeline has already caught several critical bugs that would have impacted users.

Shuangling Yin

CTO, InspectMind

Stably helps us catch bugs before production without manual testing or maintaining complex tests.

Mike Wang

CTO, Avina

Stably is a game-changer for us. It has transformed our testing process, enabling us to catch bugs before they reach production. Highly recommend!

Vikas Vair

CPO, OpenLayer

Stably's AI makes UI testing effortless while actually simulating real user flows. Our CI/CD pipeline has already caught several critical bugs that would have impacted users.

Shuangling Yin

CTO, InspectMind

Stably helps us catch bugs before production without manual testing or maintaining complex tests.

Mike Wang

CTO, Avina

Stably is a game-changer for us. It has transformed our testing process, enabling us to catch bugs before they reach production. Highly recommend!

Frequently Asked Questions

Answers to the top objections and common questions about Stably

Pilot-friendly rollout. Reviewable changes. No forced migration.

Start with one critical flow this week

Keep your workflow, prove value fast, expand only where it helps.

Start on CLI Start on Cloud Get a technical demo

Get 80% test coveragein minutes, not months

Use Stably where you already work

Payroll Setup

From first draft to dependable release checks

Plan

Create

Run

Fix + Review

Build tests visually. Keep engineering in control.

Natural language or recording

Bidirectional sync

Take over anytime

Proven accuracy. Proven stability.

One shared testing system for QA, PM, and Engineering

Governance & Control

Don't take our word for it

Tom Alexander

Andrew Shield

Gustavo Silva

Tom Alexander

Andrew Shield

Gustavo Silva

Tom Alexander

Andrew Shield

Gustavo Silva

Tom Alexander

Andrew Shield

Gustavo Silva

Lucas Del Yerro

Siddhi Mittal

Ben Kramer

Lucas Del Yerro

Siddhi Mittal

Ben Kramer

Lucas Del Yerro

Siddhi Mittal

Ben Kramer

Lucas Del Yerro

Siddhi Mittal

Ben Kramer

Vikas Vair

Shuangling Yin

Mike Wang

Vikas Vair

Shuangling Yin

Mike Wang

Vikas Vair

Shuangling Yin

Mike Wang

Vikas Vair

Shuangling Yin

Mike Wang

Frequently Asked Questions

Why not just use Claude/Codex/Cursor + Playwright directly?

Will Stably change tests automatically in our repo?

Can we keep our current CI and Playwright workflow?

How does Stably separate flaky test issues from real bugs?

Can non-engineers contribute without breaking engineering control?

Start with one critical flow this week

Build tests visually.
Keep engineering in control.