Zillow is an online real estate database company. It was founded to help others who are looking to buy or sell or looking to rent.

Zillow determines an estimate for a home based on a range of publicly available information, including sales of comparable houses in a neighborhood. Zestimate does not take into consideration home-specific factors like recent remodeling,

Real estate agents with specific market knowledge are more likely to know specific factors affecting the sale of a home such as the overall condition of the home, room flow, landscaping, views, traffic noise, and privacy.

Trulia is an online residential real estate site for home buyers, sellers, renters and real estate professionals in the United States. It lists properties for sale and rent as well as tools and information needed to be successful in the home search process.