Interactive Brokers is by no means a replacement for TransferWise. It doesn't even permit you to send money to an account that isn't in your name.
That said, its currency conversion is the real deal. If you have an account with them (I do), you can convert as little or as much as you like and withdraw it to your own account elsewhere.
I wouldn't recommend opening an account there just for currency conversion but their brokerage offering is fantastic so I'd consider currency conversion a nice benefit that comes with that.
If you want a more direct comparison, Revolut does conversion for free if your amount is under 6k/month.
That said, its currency conversion is the real deal. If you have an account with them (I do), you can convert as little or as much as you like and withdraw it to your own account elsewhere.
I wouldn't recommend opening an account there just for currency conversion but their brokerage offering is fantastic so I'd consider currency conversion a nice benefit that comes with that.
If you want a more direct comparison, Revolut does conversion for free if your amount is under 6k/month.