Banker Jack
Company

The team behind Jack.

Jack is the teammate you hire. Banker Jack OÜ is the company that built him — founded in Tallinn, operating from the most digital country in the EU, and built on a simple conviction: there will be far more entrepreneurs than traditional accounting firms can serve, and someone has to do the work.

Founder

Mihkel Karu

Founder & CEO. A licensed financial-institution operator who built the Banker Jack platform, with deep roots in Estonia's e-residency and startup ecosystem. Mihkel personally onboards every early client — when you meet Jack, you meet him too.

Around the company: senior operators in risk (Jaak Erm — ex-Paywerk, acquired by Swedbank) and legal & compliance (Hiie Ormisson — IPF Digital), and advisors from Estonia's fintech ecosystem.

The craft

Fugger's craft, back at work

Banker Jack was started in 2025, five hundred years on from Jakob Fugger, to pick up his craft.

Fugger financed emperors and popes from a counting house in Augsburg, and he is remembered for the money. He is worth remembering for the method. He brought double-entry bookkeeping north into Germany and ran consolidated accounts across more than eighty branches, at a time when most merchants could not have told you whether they were solvent. His own grandfather had walked into that city a village weaver; three generations later the family was banking the Holy Roman Empire. Wealth like that is not a windfall. It is bookkeeping, held to for a very long time.

TruthFugger's ledgers were his advantage, not his paperwork. Jack keeps yours the same way: current, complete, and readable on any day of the month rather than assembled after the quarter.
PrudenceHe provisioned a third of his lending against loss while rivals booked the optimistic number. Jack sets your tax aside before you can spend it, and tells you when one client has quietly become most of your revenue.
SpeedHe ran couriers across Europe to know things before his competitors did. Being weeks behind your own numbers was a disadvantage then. It is a strange thing to accept now.
The long gameAround twelve per cent a year, compounded across a working life — no single stroke of luck. His nephew doubled the fortune again by keeping the same system running. A method that still works in other hands is the only kind worth inheriting.

The almshouse Fugger endowed in 1521 still houses people in Augsburg, at a rent he fixed at under a euro a year — five centuries of proof that a well-built system outlasts the hands that built it, and can be taken up again by new ones. For most of those centuries this craft stayed where he left it: with institutions large enough to keep a finance department. Jack's work is to carry it the rest of the way — to a business of one.

Where we stand

Built in Estonia, for Europe

Estonia is the natural birthplace for an AI CFO: fully digital incorporation, digital tax filing, and 130,000+ e-residents running EU companies from 170+ countries. Banker Jack serves them from day one — and we are building for what comes next: EU-Inc, the proposed pan-European company framework. We publicly champion the movement, and Jack is being built as the compliance engine that can serve a single EU-wide entity type the day it exists.

17278857Banker Jack OÜ, Estonian commercial registry — Tallinn, Estonia.
EMIbanking services provided through a licensed e-money institution regulated by the Banque de France.
Aug 2, 2026the EU AI Act reached full applicability — Jack was built for it from day one, not retrofitted. More on the trust page.

Talk to us

Clients, accountants, builders, press — one address reaches the people who build Jack.

hello@bankerjack.aior meet Jack directly