Kiln
Privacy
Last updated 15 November 2026
Kiln runs on your Mac. Your code, terminals and chats stay there unless you choose to share a project with other people.
On your Mac
Projects, chats, terminal sessions, settings, your name and photo are saved in Kiln’s folder on your Mac. Kiln has no analytics, no tracking and no advertising, and it doesn’t collect crash reports.
Your AI agents
Kiln starts the agent tools you already have installed (such as Claude Code, Codex or Gemini CLI) and signs in with your own accounts. What you send an agent goes straight from your Mac to that provider, under that provider’s own privacy policy. Kiln doesn’t see, store or relay it.
Kiln Voice
Dictation runs entirely on your Mac. The first time you turn it on, Kiln downloads the speech model from Hugging Face. Your audio never leaves your Mac.
When you share a project
Sharing is optional. When you share a project or join one, Kiln makes a private account for this Mac: no email or password, just a random ID saved in a file on your Mac that only your user can read. The project’s shared parts are then stored with our database provider, Supabase, so everyone on the project sees them live:
| What | Who can see it |
|---|---|
| Your name, colour and photo | People in projects you share or join |
| Shared project name and repository address (with any login details removed) | Members of that project |
| Shared chats, messages, board cards and files | Members of that project |
| Invite codes | Members of that project; codes expire |
Access is enforced on the server: nobody can read a project they haven’t been invited to. Projects you never share are never uploaded.
Deleting your data
- Stop sharing a project (Project settings) to delete its shared chats, board and files from the server.
- Leave a project to stop seeing it.
- Delete account (click your name at the bottom of the chat list) to remove your profile, every project you shared and your messages from the server, straight away.
Deleting Kiln from your Applications folder, along with ~/Library/Application Support/Kiln, removes everything it kept on your Mac.
Updates and this website
Kiln checks this website a few times a day for a newer version. That check sends no personal information. The website is hosted by Vercel, which keeps standard server logs. It sets no cookies; it only remembers your light or dark theme in your browser.
Changes
If this policy changes, the new version will be posted here with a new date.