There are thousands of them, because it's easy to buy a sales enablement tool, database, put up a shingle, and make bold claims. Have them share case studies and intimate details on how they create success. It's easy to highlight wins, but how they handle challenging situations? How specific can they be about when a client is not a good fit? What are their metrics and milestones from beginning to revenue? Are they email-heavy, phone-heavy, or integrated, and can they tell you the pros and cons about it to your specific market?
