Ask ChatGPT about your own mail, files and notes.

Olympus is a private knowledge engine that runs on your Mac. ChatGPT can ask it questions. Your data stays on your Mac.

Install on your Mac How your data is handled

What it does

Olympus reads the sources you choose, starting with files and notes on your Mac, then accounts you already have such as Gmail, Google Drive and Dropbox. It builds a search index on your Mac. When you ask ChatGPT something like "what did Sam send me about the lease?", ChatGPT asks Olympus, and Olympus answers with citations to your own items.

Your index stays on your Mac. Olympus has no cloud copy of your mail, files or notes. Only what a question needs leaves the Mac, and only to the ChatGPT conversation you are in.
Private and Secret items never go to ChatGPT. Olympus sorts every item into one of four tiers: Public, Personal, Private or Secret. ChatGPT only ever receives Public and Personal material. Private items are answered on your Mac, or not at all. Secrets such as passwords and keys are never read by any model.
You approve ChatGPT on your Mac. Connecting ChatGPT takes one click on an approval page that opens on your Mac. There is no Olympus account and no password to create.
One secure connection. ChatGPT reaches your Mac through the Olympus relay at mcp.olympusplugin.ai. The relay forwards requests over an encrypted connection your Mac opens. It stores no content and logs no content or tokens.

The four tiers

Tier	Examples	Can ChatGPT see it?
Public	Newsletters, published articles, saved web pages	Yes, when it helps answer your question
Personal	Everyday mail, meeting notes, plans, receipts for ordinary purchases	Yes, when it helps answer your question
Private	Health, money, legal and identity matters	No. Answered on your Mac, or withheld
Secret	Passwords, recovery codes, private keys	No. Never read by any model

Olympus judges each item on its own, not each folder or account. If a question can only be answered from Private items, ChatGPT is told that the answer stays on your Mac and is given nothing else.

What you need

A Mac running a recent version of macOS.
ChatGPT, with the Olympus plugin added. Installing uses the ChatGPT desktop app for Mac.
Your Mac awake and online when you ask. If it is asleep, ChatGPT will say your Mac is offline.