Established nine years ago, The Find has been offering users a search engine for online stores.
"We are now starting our next chapter by combining forces with Facebook to do even more for consumers. Facebook's resources and platform give us the opportunity to scale our expertise in product sourcing to the over 1 billion people that use the platform.
"Key members of our team are joining the company and will be working hard to integrate our technology to make the ads you see on Facebook every day better and more relevant to you," the company said.
The company says its shopping index contains more than 500 million products from 500,000 stores.
"Unfortunately, this means we will be taking our search engine offline in the next few weeks," The Find team added.