Radar / Crypto-asset service provider
21bitcoin
Crypto-asset service provider Austria 21bitcoin.app ↗ Full listing
Reviewed 2026-10-21
Our verdict
No major concerns found
Public sources do not show serious problems.
- In Sept 2026, trade media reported that a breach at the third-party provider Canny exposed some 21bitcoin user data (name, email, phone, date of birth, partly balances). …
What should I do?
- Still check that the website address is exactly the official one (beware of copies).
- Use payment methods with buyer protection where possible.
- Keep records of your payments.
Based on public sources at the date of review. Not a finding that the company acted unlawfully; the company can respond below.
About
21bitcoin is an FMA-regulated and audited virtual asset service provider based in Austria. 21bitcoin was established 2021 by Daniel Winklhammer and Dominik Seibold. They specialize in bitcoin financial services. Their mobile bitcoin brokerage offers retail investors a platform to buy, sell, track and use bitcoin. 21bitcoin provides the opportunity for users to store bitcoin for them so that no own…
The full check
🪪LicenceLicensing & registrationOK
The ESMA CASP register data (via mirror sites) shows FIOR Digital GmbH as an authorised CASP under FMA Austria since 2025-11-27, with 3 services and an EEA passport. The earlier FMA VASP registration status was not separately verified. Direct ESMA/FMA register lookup is recommended.
👥Who owns itOwnership & controlOK
Two managing directors and co-founders are named in the imprint, which gives the Firmenbuch number. Volksbank Raiffeisenbank Bayern Mitte eG is described as co-owner/investor. The full shareholder structure was not verified in the register.
🏦Where your money goesBanking & payment chainOK
Euro balances and interest are linked to Volksbank Raiffeisenbank Bayern Mitte eG, a regulated bank and investor. Bitcoin custody is reported to be with BitGo Europe GmbH (BaFin-licensed), based on third-party reports.
⚖️Regulator actionsRegulatory actionsNot checked yet
Not yet assessed.
📰News & reputationAdverse media & OSINTCaution
In Sept 2026, trade media reported that a breach at the third-party provider Canny exposed some 21bitcoin user data (name, email, phone, date of birth, partly balances). The company says its own systems and funds were not affected. Users later reported phishing calls impersonating the company.
💬Customer experienceCustomer conductOK
Review platforms and comparison sites report mostly positive user feedback (Trustpilot about 4.8 per an aggregator). Criticism mainly concerns fees, bitcoin-only scope and missing 2FA. No pattern of withheld funds was found. Some forum users were upset about the data incident.
How we rate: methodology.
Similar providers
Licences & registrations
| Regulator / register | Type | Number | Status |
|---|---|---|---|
| FMA (Austria) / ESMA CASP register | MiCAR CASP authorisation (custody, exchange crypto-to-funds, transfer) | LEI 529900HMYYJR2NHVZ124 | Active |
People & network
Version history
- 2026-10-21 Green signal Automated re-check
- 2026-10-21 Insufficient data Listed, not yet assessed
Are you 21bitcoin?
You can respond to this profile at any time, free of charge: send a statement for publication or ask us to correct a fact. Please include sources. We review every request and record the outcome.