Privacy
Effective 10 November 2026
In short: Chalk runs on your Mac and keeps your boards there. We only handle what we need to sell you Chalk and send you your key: your email, your purchase and the payment details Stripe collects. We don't sell data, and neither Chalk nor this website uses analytics or ad trackers.
Who's responsible
The Chalk team, who make and sell Chalk, are responsible for the personal data described here. For questions or requests, write to our support address.
The Chalk app
- Boards, notes and settings stay on your Mac, in
~/.chalk. Chalk's board server listens only on your own machine. - Chalk has no account and no analytics, and doesn't send your boards or code to us.
- When Claude reads the board, that goes to Anthropic through Claude Code, the same way your prompts do. Anthropic's privacy policy covers it.
- Installing and updating Chalk sends your license key to our download service so it can check it. Your license key contains your email address and purchase ID.
What we collect when you buy
| What | Why | Who handles it |
|---|---|---|
| Email address, name, billing country or address, payment details | To take payment and prevent fraud | Stripe (we never see your full card number) |
| Email address and license key | To email you your key, and again if you ask for it | Resend |
| Purchase record (date, amount, Stripe IDs) | Records, refunds and tax | Stripe |
| IP address and request details in server logs | To run the website and download service and keep them secure | Vercel (website), Render (downloads) |
| What you write to support | To help you | Our email provider |
This website loads no third-party scripts or fonts. Its fonts are served from our own site.
Legal basis
Where laws such as the GDPR or Nigeria's Data Protection Act apply, we use this data to perform our contract with you (selling and delivering Chalk), to meet legal duties such as tax records, and for our legitimate interest in keeping our services secure.
How long we keep it
Purchase records are kept for 6 years, because tax law requires it. Server logs are kept for no more than 30 days. Support emails are kept for up to 2 years after we last write to each other, unless they're part of a refund or dispute that needs them longer.
Your rights
Depending on where you live, you can ask to see, correct or delete your data, or object to how we use it. Write to our support address and we'll answer within 30 days. If you're unhappy with our answer, you can complain to your local data protection authority.
Transfers
Our providers may process data outside your country, including in the United States, under safeguards such as standard contractual clauses.
Children
Chalk isn't meant for children under 16, and we don't knowingly collect their data.
Changes
If we change this policy we'll update the date above, and email buyers about any significant change.