From the website:

Spoke is an Open Network™ of over 35 million people at 900,000 companies that makes it easy for business people to discover and gain access to business people via detailed contact and background information as well as their professional network.

Sales people, marketers, recruiters, job seekers, business researchers, or anyone looking to grow their professional network use Spoke to gain access to the right people at the right companies. Individuals and groups at small and large companies use Spoke's business contact information, and many corporations have purchased Spoke's service to leverage their own connections to accelerate their business development efforts and sustain critical business relationships.