The usual German suspects, if you can handle the language - i.e., open and handle the account in German:
- DKB (somewhat picky opening up for non-residents, and/as you will need to apply for their “Cash” payment account - though the included VISA card has got excellent conditions, if you have 700€ or more flowing into the account each month)
- ING (harder or impossible to open as non-resident)
I’ve had (or still have) accounts with all of them.
As usual, the penny pinchers here on the forum will tell you how many fractions of a percent cheaper IBKR will be (on spread and currency conversion) once you’ve reached the 100k balance threshold.
Apart from dealing through a reseller:
Absolutely hideous and outdated user interface.
The HTML/CSS/JS is so bad, I couldn’t properly click on some buttons recently (while using an up-to-date browser on a non-windows platform). But hey, it’s cheap…
Edit: since it is being discussed below: I‘m talking about one-time costs with spreads and currency conversion. For recurring costs, the differences between different fund choices can be substantiated long-term