21bitcoin vs Flatex Comparison

21bitcoin has established itself as an Austrian Bitcoin app across German-speaking Europe and deals exclusively in Bitcoin. On instant purchases the provider charges a service fee of 1.49%, or 1.29% with a referral code; limit orders and instant sales cost 1.49%, and OTC orders from €100,000 cost 0.49% to 0.99%. In the savings plan no service fee applies from day 8 onwards, while the first seven days cost 0.99%. According to 21bitcoin, euro deposits, account management and Bitcoin custody are free of charge; a euro withdrawal costs €1.

Austria’s Financial Market Authority (FMA) granted FIOR Digital GmbH authorisation as a crypto-asset service provider under Article 63 of the EU’s MiCAR regulation by decision of 27 November 2025, so a clearly identifiable European supervisor stands behind the app. Customer Bitcoin is kept separate from the company’s own holdings; the cold-wallet keys are held by BitGo Europe GmbH, which itself holds a MiCAR authorisation from BaFin.

The savings-plan approach is refreshingly uncomplicated: purchases run hourly, daily, weekly, every two weeks or monthly from the euro balance, and the flat wallet-transfer fee of 0.00001 BTC is widely seen as fair. Users single out the automatic transfer to a personal wallet above defined thresholds as a genuinely useful security feature. 21bitcoin now also offers limit orders at a target price and variable interest of 1.21% p.a. on the euro balance; the interest is granted by Volksbank Raiffeisenbank Bayern Mitte eG, and 21bitcoin converts it into Bitcoin free of charge on request.

Because Bitcoin is the only asset on offer, 21bitcoin is not aimed at investors who want a broad crypto portfolio, a limitation some users do point out. Two-factor authentication in the app and the €10 minimum order are also seen as leaving room for improvement. That makes 21bitcoin a good fit for Bitcoin-focused investors in German-speaking Europe who save regularly and care about automatic wallet transfers and Austrian regulation.

For investors in Germany who want to hold crypto with the same broker as their shares and ETFs, flatex is a solid choice: according to flatex, liquid assets such as Bitcoin cost 0.6% in total including the spread, less liquid ones 0.7%, each for customary order sizes. The selection of 25 cryptoassets is small, though, there is no staking and no crypto savings plan, and coins can neither be transferred to your own wallet nor deposited from one. flatex does not withhold tax on crypto gains, because directly held crypto is not subject to Germany's flat-rate withholding tax. Clients without a registered address in Germany cannot use direct crypto trading at all and are left with crypto ETNs. Since April 2025 the bank has been notified to BaFin under MiCA for executing crypto orders, and its custodian Tangany has held a MiCA authorisation since August 2025. In France, the Netherlands and Spain the same bank has offered direct crypto trading under the DEGIRO brand since September 2025. If you prefer securities, more than 55 crypto ETNs can be bought through a savings plan from €1 with no order commission. If you want a wide choice of coins or your own wallet, a crypto exchange is the better fit.