Some years ago i checked some sites and it wasn't possible (house edge was too big, bigger than the house edge in traditional sportbook sites).
Maybe something is changed in the last years?
When you say arbitrage in this context, you are looking for sportsbooks that where either one place seriously misprices a bet or two of them have potentially mispriced a bet to a smaller degree. It's not impossible but the amount of chances to do this will be astonishingly small because these companies would likely lose a lot of money if this happened on a regular basis. It's simply not realistic to think that you could do this on a regular basis because it is effectively a money printing machine if anyone finds this setup. You might be better off comparing sportbooks to a P2P marketplace which usually has much tighter betting on it, although the commission they charge usually costs a small spread as well.