Privacy Policy

Last updated: March 14, 2026

Kmux is an open source project licensed under the Apache License 2.0. This Privacy Policy explains what data the kmux CLI collects (when you opt in) and what the kmux.dev website does and does not collect.

The Website

The kmux.dev website is a static site. It does not use cookies, does not run analytics, does not collect email addresses, and does not require an account. We do not collect any personal data through the website.

The site is hosted on Vercel, which may log standard web server access data (IP addresses, request timestamps) as part of normal infrastructure operations. This data is governed by Vercel's privacy policy.

The CLI: Telemetry

The kmux CLI includes optional, anonymous usage analytics. Telemetry is disabled by default and only activates if you explicitly opt in during setup or via kmux config analytics on.

What is collected (when opted in)

• Command name (e.g. init, up, switch)
• Command success/failure status and duration
• Privacy-safe error category (e.g. “PORT_CONFLICT”, never raw error messages)
• OS, CPU architecture, and kmux version
• A random machine ID generated locally (not tied to your identity)

What is never collected

• Project names, file paths, or directory structures
• Command arguments or flags
• Environment variable values
• Terminal output or file contents
• IP addresses, usernames, or any personal information

How to control telemetry

• kmux config analytics off : disable via CLI
• KMUX_TELEMETRY_DISABLED=1 : disable via environment variable
• Automatically disabled in CI environments
• KMUX_TELEMETRY_DEBUG=1 : inspect exactly what would be sent, without sending

Where data is sent

Telemetry events are sent to PostHog. Events are fire-and-forget : telemetry failures never affect CLI functionality.

Data Sharing

We do not sell, rent, or trade any data. The only third-party services that receive data are Vercel (website hosting) and PostHog (CLI telemetry, only when opted in).

Your Rights

Since the website collects no personal data and CLI telemetry is anonymous and opt-in, there is typically no personal data to access, correct, or delete. If you believe we hold data about you, contact us and we will address your request within 30 days.

Changes to This Policy

If we add data collection to the website or change the CLI telemetry scope, we will update this page and the “Last updated” date. Material changes will be noted in the project changelog.

Contact

Questions about this policy: privacy@kmux.dev