Browserbase Director alternative for building browser agents
A Browserbase Director alternative from TestMu AI. Build and run browser agents from natural language with Kane CLI, get a verified pass or fail and shareable evidence, and scale on Browser Cloud. Free to install.
or read the documentation
Why teams move from Director to Kane CLI
Director is a complete UI for building browser agents, a no-code or low-code visual builder on top of Browserbase and Stagehand. The promise is building agents without writing automation by hand.
Kane CLI keeps that accessibility and adds a stronger production contract: it authors and runs browser flows from natural language with no builder to learn, and produces a verified pass or fail with shareable evidence rather than just an agent.
Browser Cloud is the infrastructure answer, the cloud Chrome that the agent runs on, with a built-in tunnel, full session transparency, and best-effort stealth.
Kane CLI vs Browserbase Director
Both make building browser agents accessible. Kane CLI adds a verdict and shareable evidence.
| Capability | Kane CLI + Browser Cloud | Director |
|---|---|---|
| Authoring | Natural-language authoring, no builder to learn | Visual builder for browser agents |
| Where it runs | Browser Cloud cloud Chrome, Kane CLI runs on it | Runs on Browserbase |
| Output | A verified flow plus shareable evidence | An agent |
| Verified pass or fail | Built-in assertions, pass or fail | Agent output |
| Model and API keys | Managed model, nothing to configure | Platform-managed |
| Native Playwright export | One command |
What you get with Kane CLI
Build browser agents from natural language, with a verdict on top.
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 Director 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 Browserbase Director alternative. Director is a no-code visual builder for browser agents on Browserbase and Stagehand. Kane CLI authors and runs browser flows from natural language with no builder to learn, returns a verified pass or fail with shareable evidence, and scales on Browser Cloud.
Director is a complete UI for building useful browser agents, a no-code or low-code visual builder layered on top of Browserbase and Stagehand. It lets you assemble browser agents without writing automation by hand.
Kane CLI keeps the natural-language accessibility but adds a production contract: a verified pass or fail with shareable evidence, autoheal, clean CI exit codes, a managed model, and one-command native Playwright export. Browser Cloud provides the cloud browsers it runs on.
Browser Cloud is the TestMu AI cloud browser infrastructure: real Chrome at scale with a built-in tunnel, full session transparency, and best-effort stealth. Kane CLI connects to Browser Cloud sessions over --ws-endpoint, the way Director 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