21bitcoin vs Flatex Comparison
| 1.29 to 1.49 % | Fees | 0.7 % |
| € 12.90 | Minimum cost per €1,000 | € 7.00 |
| 1 | Cryptos | 20 |
| SEPA Instant Transfer, SEPA Transfer | Payment Methods | SEPA Transfer |
| Licensed as a virtual currency service provider according to FM-GwG §32a Para. 2 by the Financial Market Authority of Austria | Regulation | Crypto custodian Tangany GmbH has a BaFin license. |
Cost comparison
The basis is a Bitcoin purchase worth €1,000, calculated from the disclosed trading fee. A price markup in the spread is not included, because most providers do not publish it.
| € 12.90 | Minimum cost per €1,000 | € 7.00 |
| 1.29 to 1.49 % | Fees | 0.7 % |
| € 0.75 | Wallet transfer | – |
| Yes | Cost transparency | Limited |
| € 15 | Minimum Amount | € 1 |
| SEPA Instant Transfer, SEPA Transfer | Payment Methods | SEPA Transfer |
On disclosed fees you pay €5.90 less at Flatex per €1,000 purchase.
Pros & Cons
- Transparent service fee of 1.29% to 1.49% on one-off purchases, 0% in the savings plan from day 8, with no ongoing account charges
- Withdrawals to your own wallet at a flat fee of 0.00001 BTC
- Automatic transfer to your own wallet above defined thresholds
- Savings-plan standing orders are invested in Bitcoin as soon as they arrive
- FMA-licensed as a virtual asset service provider in Austria
- Bitcoin only – the lack of altcoins is criticised by some users
- Two-factor authentication needs work, according to users
- The €15 minimum order is higher than at some competitors
- BaFin-regulated German bank with a full licence
- Direct trading in 25 cryptoassets for clients in Germany, from €1 per order
- Total costs of 0.6% including the spread for liquid assets such as Bitcoin
- Custody with Tangany, a BaFin-supervised crypto custodian
- Crypto ETNs in the same portfolio, with a German tax certificate
- Established online broker since 2006
- Direct crypto trading only for private clients with a registered address in Germany and an individual account
- Small selection of 25 cryptoassets, no staking, no crypto savings plans
- No transfers to or from a personal wallet
- No tax withheld on directly held crypto, gains must be declared yourself
- Crypto ETNs: order fees plus ongoing product costs (TER)
Score Comparison
User Experiences
AI AnalysisUser reviews paint a broadly positive picture of 21bitcoin. What owners value most is the clean, intuitive app and how easy it is to use, while individual voices see room for improvement on fees and on the feature set.
This analysis is based on 608 user reviews analysed by AI from the Apple App Store, Trustpilot and the Google Play Store. The total number of reviews on each platform may be higher — the platform ratings (star ratings) shown refer to all reviews available there. The ratings displayed reflect users' experiences and do not represent the site operator's own assessment. All information without guarantee. As of: March 2026. This comparison does not constitute investment advice.
Features
| ✓ | Savings plan | ✓ |
| ✓ | Staking | ✓ |
| ✓ | Wallet transfer | ✓ |
| ✓ | Automatic wallet transfer | ✓ |
| ✓ | Credit card payment | ✓ |
| ✓ | FMA regulation (Austria) | ✓ |
| ✓ | Web platform | ✓ |
| ✓ | Mobile app (iOS/Android) | ✓ |
| ✓ | SEPA instant transfer | ✓ |
- Automatic transfer to your own wallet above set amounts
- FMA-regulated and based in Austria
- Service fee of 1.29% to 1.49% on one-off purchases, 0% in the savings plan from day 8
- Deposits via SEPA and SEPA instant transfer
- 25 cryptoassets tradable directly for 0.6% to 0.7% in total costs including the spread
- Crypto trading in the flatex account alongside shares and ETFs
- Crypto ETNs also available as a savings plan from €25
The five areas head to head
AI AnalysisFees & Costs
On fees and costs the picture is mixed. Users describe the pricing as fair, though some point to costs they consider high. A few also note that the tax side has to be organised by the user, and that the resulting tax burden feels heavy.
Direct crypto trading: total costs of 0.6% including the spread for liquid cryptoassets such as Bitcoin and 0.7% for less liquid ones, each for customary order sizes; orders start at €1. Crypto ETNs: order fee of €5.90 per exchange order plus exchange fees, and ongoing product costs (TER) that vary by issuer. As of September 2026.
Usability & User Experience
Reviewers frequently describe the app as intuitive, uncluttered and self-explanatory, and ease of use is the single most praised aspect. A few users report problems getting into their account, but overall usability comes across positively.
Not enough reviews available.
Features & Offering
The savings plan is the feature users appreciate most. At the same time they ask for more in several places: additional coins, more savings-plan options, price notifications, a wallet inside the account and limit orders. Weekly DCA is mentioned occasionally as well.
Not enough reviews available.
Stability & Security
On stability and reliability, users mostly report trouble-free day-to-day use and describe the app as dependable. Access issues come up occasionally and are the one area some users would like to see improved.
Not enough reviews available.
Customer Support
Support is frequently described as fast, with users reporting prompt replies. Individual contact channels are occasionally seen as having room for improvement.
Not enough reviews available.
Details
| FIOR Digital GmbH | Company | flatexDEGIRO Bank AG |
| 2021 | Founded | 2005 |
| Licensed as a virtual currency service provider according to FM-GwG §32a Para. 2 by the Financial Market Authority of Austria | Regulation | Crypto custodian Tangany GmbH has a BaFin license. |
| € 15 | Minimum Amount | € 1 |
| Photo ID | KYC | eID, Video-ID, PostIdent |
Verdict
In our overall rating 21bitcoin leads with 4.0 against 3.1 for Flatex.
On disclosed fees you pay €5.90 less at Flatex per €1,000 purchase.
For most investors 21bitcoin is therefore the better choice.
21bitcoin has established itself as an Austrian Bitcoin app across German-speaking Europe, valued above all for a transparent fee structure. On one-off purchases the provider charges a service fee of 1.29% to 1.49%, and in the savings plan no service fee applies from day 8. The provider is licensed by Austria's Financial Market Authority (FMA) as a virtual asset service provider and deals exclusively in Bitcoin. Users single out the automatic transfer to a personal wallet above defined thresholds as a genuinely useful security feature.
The savings-plan approach is refreshingly uncomplicated: standing orders are invested in Bitcoin as soon as the money arrives, and the flat wallet-transfer fee of 0.00001 BTC is widely seen as fair. For investors in Austria, Germany and Switzerland looking for an FMA-regulated alternative to the Swiss Bitcoin apps, 21bitcoin reads as a solid option. Total costs of €7.90 on a €1,000 trade sit in the middle of the field.
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. The absence of two-factor authentication in the app and the €15 minimum order also leave room for improvement. That makes 21bitcoin a good fit for Bitcoin-focused investors in German-speaking Europe who care about cost transparency, 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. If you want a wide choice of coins or your own wallet, a crypto exchange is the better fit.