Realtor provides a marketplace for listings that are represented by licensed real estate professionals and realtors who live, work and abide by a strict code of ethics.
Redfin is a customer-first real estate brokerage that represents people buying and selling homes. Founded and run by technologists, Redfin has a team of experienced, full-service real estate agents who are advocates, not salespeople, earning customer-satisfaction bonuses, not commissions.
Trulia is an online residential real estate site for home buyers, sellers, renters and real estate professionals in the United States.
Zillow is the leading real estate and rental marketplace dedicated to empowering consumers with data, inspiration and knowledge around the place they call home, and connecting them with the best local professionals who can help.