Updated September 29, 2026 · BrokerCue Editorial Team
BUX vs flatex Online-Broker (DE)
Where BUX and flatex Online-Broker (DE) differ
| Compare |  BUX |  flatex Online-Broker (DE) |
|---|---|---|
| Stock trade fee | €3.99Lower | €5.90 |
| Account fee | €2.99 | €0Lower |
| Markets | Stocks, ETFs | Stocks, ETFs, Forex, CFDs, Options, Crypto, Bonds, Funds, MetalsCovers more |
| Regulators | Dutch Authority for the Financial Markets (AFM) | BaFin |
| Currency conversion fee | 0.75% | 0.4%Lower |
| Platforms | BUX app | Web, Mobile |
| Deposit and withdrawal fees | Not confirmed | Free |
| Account types | Not confirmed | Joint |
| Interest on cash | 2% | Not confirmed |
Same on both: Investor protection (EU ICS up to EUR 20,000).
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Key differences
- flatex Online-Broker (DE) scores higher overall: 8.8 vs 8.6.
- Regulators: only BUX offers Dutch Authority for the Financial Markets (AFM).
- Regulators: only flatex Online-Broker (DE) offers BaFin.
- Stock trade fee is lower at BUX: €3.99 vs €5.90.
- Account fee is lower at flatex Online-Broker (DE): €0 vs €2.99.
- Currency conversion fee is lower at flatex Online-Broker (DE): 0.4% vs 0.75%.
- Markets: only flatex Online-Broker (DE) offers Forex, CFDs, Options.
- Platforms: only BUX offers BUX app.
- Platforms: only flatex Online-Broker (DE) offers Web, Mobile.
- Support channels: only BUX offers Chat.
Our verdict on each
BUX
BUX suits investors who want a Dutch broker for stocks and ETFs and accept a set fee per trade. It charges an account fee of €2.99 and a stock trade fee of €3.99, which is why the offer score sits at 2.1 and the overall score at 2.1.
flatex Online-Broker (DE)
flatex suits investors who prefer a flat fee per trade and no account charge. A stock trade costs €5.90, the account fee is €0 and deposits and withdrawals are free, so holding an account costs nothing beyond each order placed.
Score breakdown
| Area | BUX | flatex Online-Broker (DE) |
|---|---|---|
| Cost | 8.4 | 8.8HigherAccount fee of €0, a flat €5.90 per stock trade and free deposits. |
| Offer | 8.7 | 9.2Higher |
| Trust | 8.7Higher | 8.6 |
Where each is licensed and available
| Country | BUX | flatex Online-Broker (DE) |
|---|---|---|
| Germany | Not confirmed | |
| Netherlands | Not confirmed |
How they place
| Ranking | BUX | flatex Online-Broker (DE) |
|---|---|---|
| Stock and ETF brokers | 203 of 471 | 178 of 471 |
Every fact side by side
| Fact | BUX | flatex Online-Broker (DE) |
|---|---|---|
| Features | Fractional shares, Mobile app | Crypto, Demo account, Mobile app |
| Pricing model | Low fees | Low fees |
| Audience | Beginners, Experienced | Not confirmed |
| Legal entity | BUX B.V. | flatexDEGIRO SE |
| Headquarters | Netherlands | Germany |
| Founded | 2013 | Not confirmed |
| Support channels | Email, Chat, Help centre | Email, Phone, Help centre |
Where each stands against the rest
| Fact | BUX | flatex Online-Broker (DE) | Median |
|---|---|---|---|
| Stock trade fee | €3.99above the median | €5.90highest quarter | €1 |
| Account fee | €2.99highest quarter | €0at the median | €0 |
| Currency conversion fee | 0.75%highest quarter | 0.4%below the median | 0.45% |
| Interest on cash | 2%lowest quarter | Not confirmed | 3% |
Median across 52 listed brokers.
Pros and cons
BUX
Pros
- Fees follow a low-fee model: a stock trade fee of €3.99 per trade, an account fee of €2.99 and a currency exchange fee of 0.75%.
- Regulated by the Dutch Authority for the Financial Markets (AFM), with money held under the EU ICS up to EUR 20,000.
- Aimed at both beginners and experienced investors, with fractional shares and a mobile app listed in fractional shares and mobile app.
Cons
- The account fee of €2.99 applies on top of a stock trade fee of €3.99, so frequent trading costs add up.
- On stock trade fee it ranks 136 of 161, so cheaper share dealing sits elsewhere.
- Markets are limited to stocks and etfs, where CFI offers stocks, etfs and forex.
flatex Online-Broker (DE)
Pros
- No account fee: €0 on the standard account.
- Deposits and withdrawals are free: free.
- A flat stock trade fee of €5.90 rather than a percentage, with currency exchange at 0.4%.
Cons
- The stock trade fee of €5.90 is higher than most rivals, where the site median is €0.
- Only a joint account type is listed in joint, so there is no ISA or SIPP wrapper for UK investors.
- Support runs on email, phone and help centre only, with no live chat listed.
Who each suits
BUX
Who it suits
- Investors who want a regulated European broker covering stocks and etfs at a flat fee per trade.
- People who prefer mobile investing, since fractional shares and mobile app includes fractional shares and a mobile app.
- Readers who weigh protection first, since money sits under the EU ICS up to EUR 20,000 at a broker regulated by the Dutch Authority for the Financial Markets (AFM).
Who should look elsewhere
- Traders who want forex, contracts for difference or crypto, since CFI covers stocks, etfs and forex and BUX covers stocks and etfs.
- Share dealing fans after a free stock trade fee, since eToro lists $0 against the €3.99 here.
- Anyone put off by a standing charge, given the account fee of €2.99 where Vantage lists $0.
flatex Online-Broker (DE)
Who it suits
- Investors in Germany who want a flat fee per trade and no account charge
- Long-term stock, ETF, fund and bond holders rather than active traders
- Anyone who needs crypto, forex, CFDs and options under the same account
Who should look elsewhere
- Day traders, who pay €5.90 on every small order where eToro charges $0
- UK investors after an ISA or SIPP wrapper, since joint lists a joint account only
Current offers
flatex Online-Broker (DE)
Current offer
Bonus
20 commission-free trades on account opening: 20 trades
upon account opening
Source, checked September 26, 2026
Country by country
| Country | BUX | flatex Online-Broker (DE) |
|---|---|---|
| Germany | No | Yes |
Questions about each
BUX
How much does it cost to buy a share at BUX?+
A stock trade costs €3.99 per trade under a low-fee model, and a currency exchange fee of 0.75% applies on currency conversions. Because the trade fee is a flat amount rather than a percentage, the cost does not grow with the size of the order. A flat account fee of €2.99 also applies to the account.
Is there an account or inactivity fee?+
There is an account fee of €2.99, charged on the account regardless of how much it holds. That is a flat charge rather than a percentage, so it does not rise as the portfolio grows. BUX ranks 108 of 138 on this line, which places it towards the expensive end of the brands compared here.
flatex Online-Broker (DE)
What does it cost to trade a stock at flatex?+
A stock trade costs €5.90 per order, the same flat rate on every trade size. There is no account fee, at €0, so holding an account adds nothing to the bill. For comparison, the typical broker charges €0 per stock trade.
Is there any account or inactivity fee?+
The account fee is €0, so there is nothing to pay for holding the account open. No separate inactivity charge appears in the available details. Across the brokers listed, the highest account fee reaches €219.24.
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