No-code Stagehand (Browserbase) alternative for browser automation
Kane CLI is the no-code Stagehand alternative. No SDK and no model keys, just a natural-language objective that drives a real browser, self-heals when the UI changes, and returns a verified pass or fail. Browser Cloud handles the browsers at scale. Free to install.
or read the documentation
Why teams move from Stagehand to Kane CLI
Stagehand gives you four clean primitives in an SDK, act, extract, observe, and agent, which is great for building browser automation in code. But in production you inherit the rest: model wiring, keys and token spend, your own assertions, reporting, CI, and a cloud like Browserbase for scale.
Kane CLI moves that into the tool: a single CLI with a managed model that drives a real browser, autoheals when the UI shifts, asserts, and reports a verified pass or fail with video. Cached test.md replay keeps CI cheap.
And you keep the escape hatch: any flow exports to native Playwright with one command, so you are never locked into an SDK or shut out of the code underneath.
Kane CLI vs Stagehand
The same goal, an LLM driving a real browser, with a different contract for production.
| Capability | Kane CLI + Browser Cloud | Stagehand |
|---|---|---|
| Authoring | Natural-language objectives, no code | Write act and observe in an SDK |
| Structured extraction | store-as extraction into final_state | extract with a Zod schema, in code |
| Multi-step runs | Resilient runs up to 50 steps, bifurcation for parallel flows | agent primitive you orchestrate |
| Survives UI changes | Autoheal plus confidence-scored matching | Re-resolves intents at runtime |
| Model and API keys | Managed model, nothing to configure | Bring your own model and keys |
| Verified pass or fail | Built-in assertions, NDJSON, CI exit codes | |
| Cloud browsers | Runs on Browser Cloud via --ws-endpoint | Needs Browserbase for cloud scale |
| Native Playwright export | One command to export Playwright code |
What you get with Kane CLI
Everything Stagehand leaves you to assemble, handled by the tool.
No code, no keys
Skip the SDK wiring and the model and API key setup. Install one CLI, describe the journey in natural language, and Kane CLI drives a real browser with a managed model.
Resilient by default
When the frontend changes, Kane CLI adapts on its own, pushing through up to 50 steps until the full journey is verified instead of breaking on a moved element.
Verified pass or fail
Built-in assertions check each step, not just the final screen, and flag the exact point of failure. A real result, not raw agent output to parse.
Replay and caching
Validated flows replay from a cached test.md with no repeat LLM cost, so re-running the suite in CI does not keep burning tokens.
Cross-browser cloud and CI
Scale to cross-browser and cross-OS runs on the TestMu AI grid with one flag, and gate pipelines on clean exit codes from your terminal.
Own the Playwright code
Export any validated flow to native Playwright with one command, then modify and own it. The convenience never locks you in.
Build up confidence locally
Start in your terminal
Validate on the cloud
Release with confidence
Scale on Browser Cloud
Need the browsers too? Browser Cloud is the TestMu AI infrastructure layer: real, full-featured Chrome sessions on demand at scale, with a built-in tunnel to localhost and staging, full session transparency, persistent state, and best-effort stealth.
Install it with npm install @testmuai/browser-cloud. Kane CLI connects to Browser Cloud sessions over --ws-endpoint, so the same natural-language flow runs on real cloud browsers and scales across them.
Browser Cloud is the browsers. Kane CLI is the natural-language verification that runs on them and returns a pass or fail.
From prototype to production, on one engine
Kane CLI and KaneAI share the same automation engine and dashboard.
Prototype to production
Open-source agents and SDKs are great for prototyping. Kane CLI is the production-grade, test-focused path: assertions, caching, evidence, and CI built in.
Built for the agent loop
Generate code, then verify it in a real browser before opening a PR. Kane CLI closes the gap between what an agent writes and what works.
Evidence you can share
Every run produces a persistent video, step trace, and replay link to drop into a PR or bug report, backed by a dashboard your team can browse.
Replace Stagehand in three steps
Install
Run npm install -g @testmuai/kane-cli, then sign in with your TestMu AI account. No project to scaffold and no API keys to manage.
Describe the flow
Tell Kane CLI what to do in natural language, or point your AI coding agent at the agent guide and let it drive the browser.
Run and verify
Kane CLI drives a real browser, verifies each step, and returns a pass or fail with video proof. Re-runs replay from cache with no repeat LLM cost.
Get Started With Kane CLI
🎉 Launch offer: Bonus credits for the first 3 months on paid plans
Choose the right plan for you
Local test authoring via CLI
Auto-heal & vision
View test cases on UI
Test Manager
Free
$0
/month
200 Credits
Resets in every
30 days
Starter
$19
/month
2000 Credits
Launch: 4,000 Credits (+100%)
Bonus for first 3 months
Pro
$99
/month
10,000 Credits
Launch: 15,000 Credits (+50%)
Bonus for first 3 months
Enterprise
Get access to solutions built on Enterprise-Grade Security, Privacy, and Compliances.
Need more credits?
Got a bigger use case in mind?
Let’s talk
Choose the right plan for you
Free
$0
/month
200 Credits
Resets in every
30 days
Starter
$19
/month
2000 Credits
Launch: 4,000 Credits (+100%)
Bonus for first 3 months
Pro
$99
/month
10,000 Credits
Launch: 15,000 Credits (+50%)
Bonus for first 3 months
Enterprise
Get access to solutions built on Enterprise-Grade Security, Privacy, and Compliances.
Need more credits?
Got a bigger use case in mind?
Let’s talk
Get the technical rundown
Documentation
Everything you need to install, configure, and run Kane CLI in under 2 minutes.
Frequently asked questions
Kane CLI by TestMu AI is the leading no-code Stagehand alternative. Stagehand is an open-source AI automation SDK: you write act, extract, observe, and agent calls in TypeScript or Python, bring your own model and keys, and wire it to a cloud like Browserbase. Kane CLI takes a natural-language objective from any terminal, drives a real browser with a managed model, self-heals when the UI changes, verifies with built-in assertions, and returns a clean pass or fail with shareable video proof. No SDK and no model keys to wire up.
Stagehand is an open-source AI browser automation SDK from Browserbase (MIT, TypeScript and Python). It exposes four primitives, act, extract with a Zod schema, observe, and agent, and resolves intents at runtime so scripts survive redesigns. It is a strong choice for building browser automation in code, but resilience contracts, assertions, reporting, and CI are left for you to assemble.
Three differences. First, no SDK to write and no model or API keys to wire up, because Kane CLI is a single CLI with a managed model behind it. Second, it verifies outcomes with built-in assertions and returns a real pass or fail with NDJSON and clean CI exit codes, not raw agent output. Third, it ships autoheal with confidence-scored matching, cached test.md replay so re-runs cost no repeat LLM tokens, shareable video proof, and one-command native Playwright export.
No. Stagehand expects you to bring your own model and API keys and pay for every token on every run. Kane CLI uses a managed model out of the box, so you install it and go. Validated flows also replay from a cached test.md with no repeat LLM cost, so frequent CI re-runs do not keep burning tokens.
Yes. Browser Cloud is the TestMu AI cloud browser infrastructure: real, full-featured Chrome sessions on demand at scale, with a built-in tunnel, full session transparency, and best-effort stealth. Kane CLI connects to Browser Cloud sessions over --ws-endpoint, so the same natural-language flow runs on real cloud browsers, the way Stagehand leans on Browserbase.
Teach your agent the right skills
Point your AI coding agent at the Kane CLI guide and it will install, authenticate, and run verified browser flows on its own, no SDK or API keys required.
Point your agent to: testmuai.com/kane-cli/agents.md