Privacy

Last updated October 17, 2026

PromptMason keeps your prompts on your own computer. We don't sell your data, and we don't run a server that stores your library. The app sends data over the internet only in the cases listed below, and the Chrome extension never does.

The desktop app

Your prompts, blocks, folders, variables, and settings are stored in a database file on your computer.
The app has no accounts, no analytics, and no telemetry.
The app runs a small server that listens only on your own computer (127.0.0.1). Other computers can't reach it, and apps on your computer need an access token you control to use it.

When the app connects to the internet

License checks. If you enter a license key, the app checks it with our payment provider, Polar: when you activate the key (sending the key, a random ID for your computer and your computer's name) and when the app starts and every 24 hours after (sending the key and that random ID). Your prompts and blocks are never sent.
AI features you use. When you run AI assist, Evaluate or Chat with a cloud AI provider, the text involved is sent to that provider, using your own account with it, under that provider's terms. The local model runs on your computer and sends nothing.
The local model download. Downloading the optional local model fetches it from our download server. No prompt text is sent.
Web tabs. Websites you open in the app's web tabs receive what you type there, under their own terms.
Sync and backups. If you turn them on, encrypted files are written to a folder you choose, such as one in your own cloud storage. We don't receive them.

The Chrome extension

The extension talks only to the PromptMason desktop app on the same computer, at http://127.0.0.1. It makes no other network requests.
It saves its own settings in Chrome's local extension storage: the extension token you paste in, the port, and view choices like your last filter and sort. These stay in your browser.
It copies a prompt to your clipboard only when you click to copy it.
It does not read the pages you visit, your browsing history, or anything you type into websites.
It has no analytics, no tracking, and no ads.

This website

promptmason.ai is a static website. It doesn't use cookies or analytics. Our hosting provider, Cloudflare, may process standard request data such as IP addresses to deliver and protect the site.

The site also has a help chat. Here is how it handles your data:

When you use it, your messages are sent through Cloudflare to Anthropic, our AI provider, to write an answer from our guides. See Anthropic's privacy policy and Cloudflare's privacy policy.
We don't store your messages or keep logs of them.
The chat uses no cookies.
When you open the chat, Cloudflare Turnstile checks that you're not a bot.
Don't type passwords, recovery codes or payment details into the chat.

When you download PromptMason, our payment provider, Polar, collects your email address, counts downloads and gives you the installer. Purchases are processed by Polar.

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