Sotheby’s International Realty is a luxury real estate brand founded in 1976. Sotheby's International Realty operates as a franchise focusing on brokering and marketing of residential real estate.

A specific branch of Sotheby's partnered with Hatch Apps to build a mobile app to present their listing to potential buyers. The app included a grid-view of properties, list views, web view, call, and email support. The team used push notifications to engage potential buyers when new properties went live. Additionally, the API built with the API Builder was connected to Zapier to send automated email to users who expressed interest in a property.