I use Wise a lot, both for my company as in my private life.

The other day, I had to move money from my European bank account to my American bank. Since most banks rip you off with FX, I used wise. After I transferred money into my wise, they were asking a million questions where the money is coming from. Whatever you submit (official tax filings, invoices, bylaws), it's not enough and they want more. So they won't release the money to you until they are satisfied.

All these documents have to be emailed and there is no transfer portal.
Wise has good rates, but be aware of their KYC practices.