Personally, I've always found Redfin so much better than Zillow in the areas that are covered by Redfin (better data, better UI, overall better user experience)

Personally, I've always found Redfin so much better than Zillow in the areas that are covered by Redfin (better data, better UI, overall better user experience). Having lived only in such areas for more than 10 years, I was surprised a few years ago to discover that Zillow was the industry leader.