Apollo is a contact database and sales intelligence platform with over 275 million professional records. For staffing firms, it serves as the prospect list builder — filtering employers by the specific attributes that indicate a viable new client: industry, employee headcount, geography, and the seniority level of the decision maker (HR Director, VP of HR, Operations Manager, Plant Manager). A single Apollo search combining these filters returns a list of verified company contacts with email addresses, phone numbers, LinkedIn profiles, and company details — in minutes rather than the days that manual list research requires.