Idle euros, at work.

We transform idle balances into productive assets.

Open an accountSee how the policy works
0.59%
Your bank, today
2.54%
EURe, Aave V3
<10s
Back in your account
€0
To mint or redeem

ECB euro-area corporate overnight rate, June 2026. Onchain rate is variable and not guaranteed.

Why

Yield you can actually use.

  • Continuous interest

    Earns by the day, not by the term

    There is no fixed period to commit to and no penalty for taking it back early. Cash that sits for four days earns for four days.

    No lock-up · no notice period

  • Instant liquidity

    Back in your account in seconds

    Redemption runs on SEPA Instant, which does not close. Friday evening, bank holiday, the week of year-end — it settles the same way.

    SEPA Instant · 24/7/365

  • Simple reporting

    One ledger your accountant can read

    Every movement, policy check and rejection lands in a single timestamped record. Export it and hand it over — there is nothing to reconcile by hand.

    CSV · PDF · timestamped

How it works

Four steps, and none of them are yours.

OFFCHAINONCHAINYour operating accountFloor stays for payablesRead-only connectionEuro tokens02 · Minted 1:1held in your nameDeployedAllow-listed venueearning01 Sweep03 Deploy04 Redeem on demand · under 10 secondsOFFCHAINYour operating accountFloor stays for payablesONCHAINEuro tokens02 · Minted 1:1, in your nameDeployedAllow-listed venue · earning01 Sweep03 Deploy04 Redeem on demand
Everything above the floor you set is swept out, minted one-for-one and deployed to a venue you allow-listed. Ask for it back and it lands in your account in seconds, any day of the week.

The mandate

You write the policy. The chain enforces it.

Two kinds of rule — when money moves, and where it is allowed to go. You set both, once.

OffchainCodified treasury management

When money moves

Thresholds, the floor and the calendar. Tesoro watches your balance and the working week, so nobody has to remember to do this on a Friday afternoon.

  • deploy when balance > 1,000,000 EUR
  • hold floor 120,000 EUR for payables
  • earn through weekends and bank holidays
  • no sweep within 3 days of payroll
  • return everything on the 28th
OnchainEnforced by your Safe

Where it can go

Venues, concentration and payout addresses. These are not settings Tesoro promises to respect — they are a transaction guard on your Safe, and they hold whatever Tesoro does.

  • venues: Aave V3, Spiko EUTBL only
  • max 70% in any single protocol
  • withdraw only to your own IBAN
  • no LP or leveraged positions
  • anything else reverts
CustodyIn bounds

Your funds sit in a Safe you own

Tesoro is one signer on a Safe smart account, bounded by a transaction guard. It can propose movements that satisfy your onchain rules and nothing else. A transaction to an address you haven’t allow-listed is not queued for review by anyone — the Safe rejects it.

Revoke Tesoro as a signer and your position is still yours, still where you left it.

Your SafeExample · 09 Oct 2026
SAFE     eth:0x7a3f…c210SIGNERS  2 of 3 · Tesoro is oneGUARD    venue + address allowlist PROPOSE  Curve EURe/EURC LP   180,000.00GUARD    venue not in allowlistREVERT   OUT OF BOUNDS — no funds moved

Proof

It ran by itself. Here's the ledger.

Every movement, every policy check, every rejection — written down, timestamped, and exportable. Your auditor gets the same view you do.

tesoro · mandate log · account EU-0417Example account; figures illustrative
Example mandate log showing a sweep, a policy rejection and a redemption
TimestampOperationDetailAmount EUR 
2026-10-07 08:14:02BALANCERevolut EUR412,880.00
2026-10-07 08:14:02POLICYfloor 120,000 · cap 300,000 · max share 70%
2026-10-07 08:14:03ELIGIBLE292,880.00IN BOUNDS
2026-10-07 08:14:09SEPA-INST→ Monerium IBAN292,880.006.4s
2026-10-07 08:14:11MINTEURe 1:1292,880.00€0.00
2026-10-07 08:14:14DEPLOYAave V3 · EURe292,880.002.54%
2026-10-09 11:02:41PROPOSECurve EURe/EURC LP180,000.00
2026-10-09 11:02:41POLICYvenue not in allowlist
2026-10-09 11:02:41REVERTOUT OF BOUNDS — no funds moved
2026-10-09 16:40:12REDEEMEURe → EUR84,200.00
2026-10-09 16:40:19SEPA-INST→ Revolut84,200.007.1s
Deployed
208,680.00
Accrued
412.18
Floor held
120,000.00

One line in that log is amber. It is the line where your policy refused a trade that would have earned more — and that is the line worth reading twice. The software did not decide. It enforced.

Risk

What you're exposed to.

Written plainly, because you will be asked. If any line here gives you pause, that is the line working correctly.

Currency risk
Governed by your mandate. Tesoro can only hold what your policy allows — anything outside it reverts.
Counterparty
Monerium, an EU-licensed e-money institution, issues EURe 1:1 against euro held in safeguarded accounts. You hold the claim.
Smart contract
Real. Funds deployed to a lending protocol carry contract risk. Your venue allowlist is how you bound it — and you can set it to a single tokenised money market fund if you prefer.
Liquidity
Withdrawal is on demand, typically under ten seconds, 24/7. No notice period, no lock-up, no gates.
Custody
Non-custodial. Tesoro can execute your mandate. It cannot move funds outside it, and it cannot move them to itself.