Quantive is a net worth tracker built for people who already manage their investments manually — the FIRE community, expats juggling cross-border assets, anyone with illiquid holdings (private equity, real estate, crypto) that bank-sync apps cannot handle. It replaces the manual spreadsheet without asking for bank credentials or connecting to any aggregator.

The product runs in the browser and works across devices — desktop at home, phone while on the go — without sacrificing privacy. A user's portfolio is encrypted client-side before anything reaches the server: a key is derived from the password via Argon2id, all ciphertext is bound to the user's identity via authenticated encryption, and the server stores only ciphertext, the key-derivation salt, and a password-wrapped data key — never the password, the key, or the plaintext. A passive database leak reveals no portfolio contents. The crypto module is open source under the MIT licence and the full encryption design is published; the rest of the codebase is source-available under PolyForm Noncommercial 1.0.0.

Quantive supports 13 currencies (EUR, USD, GBP, NOK, SEK, DKK, CHF, CAD, AUD, JPY, PLN, BRL, INR) with historically correct foreign-exchange handling — a historical balance is valued at the rate from that date, not retroactively rewritten at today's rate. Features include allocation breakdowns, time-series history, CAGR-based forecasting with confidence intervals, and drawdown statistics. A native mobile app is on the roadmap.

The company is a bootstrapped, EU-based lifestyle software business, solo-founded and self-funded. It is not venture-backed and is not pursuing venture-scale growth. The free tier is permanent; the Pro tier is €9 per month or €90 per year.