One browser. Every session.
Katana lets you browse normally and test in isolated sessions side by side — with built-in proxying, session tooling and controlled agent access.
Daily / Test
Your normal browser and your testing browser are the same browser.
Katana keeps everyday browsing and isolated test sessions side by side in the same window.
Use DAILY tabs for normal work. Use TEST tabs when you need isolated identities, proxy routing and session control.
Katana
Daily
direct · signed in
Test
isolated sessions · proxy aware
Identities
Test the same application as multiple users at the same time.
Open the same target as Admin, User, another tenant or a completely clean session — without signing out, switching profiles or launching another browser.
Each TEST identity has its own isolated session context.
No profile switching. No disposable second browser.
Clean session
Start clean in one click.
Need a fresh state? Open a temporary Clean session for fast reproduction and isolated testing.
When the last Clean tab closes, the session goes away with it.
Workflow
Sessions become something you can work with.
Katana turns browser session state into a first-class testing workflow.
Inspect
See the state of the current session.
Clone
Branch a session before testing.
Snapshot
Save a known authenticated state.
Compare
See what changes between identities.
Cookies, auth state and session context should not live hidden deep inside the browser.
Proxy
Every test session knows where its traffic goes.
Route each test context through Caido, Burp, SOCKS or a custom upstream and always see the effective route of the active tab.
Proxying that follows the session.
Agent access
Let your agent use the browser session you already have open.
Most automation launches a separate browser with a separate session.
Katana is designed so tools like Claude Code or Codex can work with the page, session and context you are already using — with explicit permissions.
Allowed / controlled access
- Page
- Interact
- Network
Restricted by default
- DAILY
- Other identities
- Sensitive session data
Who it's for
Built for people who need more than one browser context.
Pentesters
Multi-user testing, authenticated flows, session comparison
QA
Role-based testing and clean-state reproduction
Developers
Multiple accounts, staging, debugging through proxy
Red teams
Controlled identities and operational browser workflows
Blue teams
Investigation and reproducible browser contexts
Why Katana
Testing workflows should be browser primitives.
Technical note
A real browser, not a wrapper.
Katana is built on a modern browser foundation, allowing session isolation, networking, cookies and agent access to integrate directly into the browser experience. Chromium underneath. macOS first.
Katana is coming soon.
We’re building Katana now. The first release will focus on macOS.
Get notified · Follow development