Betting exchange is a safe place, where you can bet safely with another punter. Here, the betting exchange companies act as an intermediary and match your bet with other punters. The main benefit is there are no bookmakers or bookies involved. As a result, the prices are more often desirable.
As you understand you have the ability to lay/back games, so you will be in the position of a bookmaker.
How you can see from the table bellow, the list of the betting
exchanges Is not so long like that of the sportsbooks.
Betfair
Betsson
BetDaq
MyBet