Hello, I've read a little bit on the site and forums, but haven't found an aswer.
How does the site works if I want to buy shares? It looks like I cannot see who is selling stocks, just the amount and price. Is it still safe that way? Does the site verify that the user who sells actually have stocks? Do I need to use some additional escrow service?
The stocks are already owned by the seller on the exchange when they are being sold.
It doesn't matter who's selling them as they are all guaranteed to be delivered by the operator of the exchange.
Once you list a share for sale it's locked in a kind of escrow already as the seller can't do anything else with it until he removes the ask at which point it's no longer for sale.
So escrow is built in.