Your data

How your data is handled

Slate holds your trading history, so here is exactly what it receives, where it’s kept and what it can do with it. In short: it can only read, it never trades, and your journal is yours.

What Slate can never do

Place a trade, or move or withdraw money. Every way of connecting a broker can only read your history.
Show you ads, or sell your data. Your trades are never sold, and never shared with advertisers or anyone else.
Let another account reach your journal. The database itself lets each account reach only its own rows, not just the app.
Have an AI read your journal. Your insights are worked out by fixed rules, from your own trades and nothing else.

How your trades come in

A file from your broker

The file is read on your device; the file itself is never uploaded. What you choose to add is saved to your account: the trades, and each row of the history as your broker wrote it, so deposits and dividends are never counted as profit and an import can be checked later. Undoing an import deletes what it added.

Interactive Brokers, with a key

You make a key in Interactive Brokers that can only read your reports. When you fetch your history, the key goes through Slate’s relay to Interactive Brokers and is forgotten: the relay keeps nothing and writes nothing down. If you tick “Remember on this device”, the key is kept in that browser only.

Log in to your broker, through SnapTrade

You log in on SnapTrade’s own page, so Slate never sees your broker password. SnapTrade keeps the connection and collects your history once a day. To fetch it, Slate’s server keeps a code SnapTrade gives for your account: only the server can read it, and it can only read your history. SnapTrade knows you by a number that doesn’t name you. Disconnecting in Settings removes the connection; deleting your account deletes you at SnapTrade too. (This way is still being tested.)

Where it’s kept

Your journal and account are kept by Supabase, on servers in Zurich, Switzerland.
Everything travels encrypted (HTTPS), and your password is stored only as a scrambled hash nobody can read.
Nobody looks at your journal unless you ask for help with it.
Paying happens with Paddle, which sells the subscription and handles your card. Slate never sees your card.

Yours to take, or to delete

Download everything, any time, in Settings → Your data: as a spreadsheet or in full.
Disconnect a broker in Settings whenever you like.
Delete your account in Settings → Delete my account: your trades, account values and settings go at once. Only an anonymous record that an account signed up on a date, and whether it paid, is kept for the business figures.

Who else is involved

Supabase keeps the database, Cloudflare hosts the website, Resend sends the emails you ask for, Paddle takes payments, and Frankfurter gives the European Central Bank’s exchange rates. Interactive Brokers and SnapTrade are involved only if you connect them. Who sees what, how long things are kept and your rights are all in the privacy policy.

Questions about your data? Write to hello@slatejournal.app.