Privacy Policy

Effective: June 17, 2026

The short version. We collect anonymous, aggregated counts of how Harmonic gets used — app launches, tabs opened, messages sent — so we can tell which features actually matter. We never collect the contents of your chats, the names of your repos, your branch names, file paths, your AI provider or GitHub credentials, or anything else that could identify you personally. The opt-out lives in Settings → Privacy and takes effect instantly.

1. Who we are

Harmonic is a desktop application that lets you run multiple AI coding agents — such as Claude, Codex, and DeepSeek — in parallel across your projects, each in its own git worktree. The marketing website you're reading this on is harmonic.build. Questions about this policy: prithvi@harmonic.build.

2. What we collect

On the marketing website

Page views, clicks, scroll depth (via PostHog autocapture)
Approximate location derived from IP address (country / region only)
Browser, OS, screen size, referrer
A first-party cookie that holds an anonymous PostHog identifier so repeat visits roll up to one user

Inside the Harmonic app

The desktop app sends a small set of named, schema-controlled events. There is no autocapture and no session recording. The events are:

app.launch — when the app starts. Includes the app version.
tab.created — when a new worktree tab is opened. Includes whether the branch was newly created.
chat.message_sent — when you send a message. Includes the count of attachments and whether plan mode was on. Never includes the message itself.
plan_mode.toggled — when you flip the plan-mode switch. Includes the new state (on/off).
ship.clicked — when you click the Ship button. Includes which action was taken (commit / push / open PR).
update.available and update.restart_clicked — when an auto-update is offered and accepted, so we can measure adoption.

Each event is associated with an anonymous, randomly-generated identifier created the first time Harmonic launches and stored locally at ~/Harmonic/analytics-id. The identifier is never derived from any account, email, or hardware information.

What we deliberately do not collect

The text of messages you send to your coding agents
The names, paths, or contents of your repositories or files
Branch names, commit messages, or pull request bodies
Your GitHub login, your AI provider plan or API credentials (Anthropic, OpenAI, DeepSeek), or any tokens
Your IP address inside the desktop app (we disable IP capture server-side)
Audio, video, or screen recordings of any kind

3. How we collect it

We use PostHog as our analytics processor, hosted on PostHog's US Cloud. PostHog receives the events we send, stores them, and provides us a dashboard for analysis. PostHog's own privacy policy applies to their handling of the data: https://posthog.com/privacy.

4. Why we collect it

To answer questions like: which features are actually used, are auto-updates being adopted, where do new users drop off in onboarding. We do not sell, rent, or share any data with third parties for advertising or any other purpose. The only third party is PostHog, acting as our data processor.

5. How long we keep it

Anonymous event data is retained for as long as it remains useful for product analysis, subject to PostHog's data retention defaults. You can request deletion of all data associated with your anonymous identifier at any time by emailing prithvi@harmonic.build with your identifier (find it at ~/Harmonic/analytics-id).

6. Your choices

Opt out at any time in the app: Settings → Privacy → toggle off "Share anonymous usage data". The change takes effect immediately and persists across launches.
Opt out on the website by enabling Do Not Track in your browser, or by blocking us.i.posthog.com in your network or ad-blocker.
Request deletion by email (see above).
Request access to the data we hold about your anonymous identifier, by email.

If you are in the EU, UK, or California, you have additional rights under GDPR / UK GDPR / CCPA. We will honor any valid request consistent with applicable law.

7. Children

Harmonic is not directed at children under 13, and we do not knowingly collect data from them.

8. Changes to this policy

If we make material changes, we will update the effective date at the top of this page and, where practical, notify users in the app. The current version is always the canonical one.

9. Contact

prithvi@harmonic.build