It was, until Redfin realized their customers like them better because they don't like talking to a human agent, so they raised their prices to be almost the same price as everyone else.
On the sell-side, our family has used revinre.com for several recent houses and paid 0% to a "seller's" agent, plus a few hundred dollars for them to send someone out and take better pictures than you're going to. I think they're just in Phoenix but presumably others will pop up.