QuinStreet, Inc., an Internet performance marketing company, provides customer acquisition services for its clients in the United States and internationally. It offers online marketing services to its clients in the form of qualified clicks, leads, inquiries, calls, applications, customers, display advertisements, or impressions through its Websites or third-party publishers. The company provides its services in various verticals, such as financial services, education, home services, and business-to-business technology. QuinStreet, Inc. was founded in 1999 and is headquartered in Foster City, California.