Online Real Estate giant Zillow announced that it has acquired Postlets for an undisclosed sum.

“Real estate professionals love Postlets because you create a property listing just once, and Postlets automatically distributes it across the Web,” said Zillow CEO Spencer Rascoff on the Zillow Blog. “Plus, when you create an account on Postlets, you get a personalized landing page so you can showcase all of your ‘Postlets’ in one place. You can then customize your personal gallery with a company logo and an ‘about me’ page where you can describe your services and upload a personal photo to help you gain even more exposure. And it’s free.”

According to Zillow, Postlets already has over 500,000 registered users with 350,000 sales/rental listings.

“Our goal over the past several years has been to develop simple yet innovative products that redefine real estate marketing and search,” the Postlets team said on its blog. “This deal represents a fantastic opportunity to work with some of the most amazing people in the industry and build all of the things we said we would — and much, much more. We’re extremely excited that Zillow shares our vision and is committed to invest in Postlets to deliver tools that will further help you build your business.”

“Ask anyone in the industry, and they’ll tell you that Postlets is a great tool for agents, property managers and landlords looking to promote their listings and manage their online presence, for free,” said Rascoff. “As part of this acquisition, Postlets will continue to send listings to its current distribution partners.”

Zillow’s own traffic has been on the steady increase over the past year, having nearly doubled according to Compete’s numbers.

Postlets says it will reveal more details about what the acquisition means for the company and users in the coming weeks, but promises that it will continue to operate the same.