Privacy Policy

Last updated: April 2026

The short version

  • ✓Your financial data is processed entirely in your browser and never sent to our servers.
  • ✓No account, no email, no password. We don't know who you are.
  • ✓We do collect basic, anonymous analytics — but only with your permission, and your financial data is never part of it.

Your financial data

When you upload a Trading 212 CSV file to Vizvest, it is parsed and analysed entirely inside your browser using JavaScript. The file is never transmitted to our servers — we don't have the infrastructure to receive it, store it, or read it.

When you close the tab or refresh the page, your data is gone. Vizvest has no database of your holdings, transaction history, or portfolio value. There is nothing to breach, leak, or subpoena.

This is a deliberate design choice. Most portfolio trackers require you to create an account and upload your data to their servers. We don't. The trade-off is that you need to re-upload your CSV each session — but your financial data stays on your device.

Analytics (opt-in)

We use PostHog to understand how people use Vizvest — which features are used, where people drop off, and whether new features are working. This helps us improve the product.

PostHog analytics is opt-in. When you first visit Vizvest, you'll see a consent banner. Analytics only runs if you accept. If you decline or ignore the banner, no PostHog data is collected.

What PostHog tracks (if you consent):

  • Page views and navigation paths
  • Feature interactions (e.g. which dashboard tab you viewed)
  • General session data (browser type, screen size, country)

PostHog does not receive any of your financial data. Events are generic (e.g. "viewed dividends tab") — they contain no values, tickers, or portfolio details.

You can opt out at any time by clearing your browser cookies or adjusting your browser's privacy settings.

What we don't do

  • We do not sell, share, or monetise any user data.
  • We do not use advertising networks or tracking pixels.
  • We do not set cookies for authentication, because there are no accounts.
  • We do not store your CSV data, even temporarily on our servers.
  • We do not use third-party analytics beyond what is described above.

Changes to this policy

If we ever change how we handle data — particularly if we were to introduce server-side processing or accounts — we will update this page and note the date. We will not quietly expand data collection.