The Endurance Group

The Endurance Group is a business consulting firm based in Portland, Maine, founded in 1998 or 1999 by Jim Sullivan. The company specializes in B2B sales, marketing, lead generation, and AI-driven growth strategies for professional services firms, as well as various B2B, non-profit, and B2C sectors. With a team of 10-49 professionals, it generates approximately $2 million in annual revenue. The Endurance Group offers a range of tailored, data-driven services that combine AI with human insight. Their offerings include outsourced sales, lead generation, channel development, and customer experience optimization. They also provide customized AI solutions to streamline operations and enhance customer interactions. The firm emphasizes integrity, creativity, and maximizing customer lifetime value, positioning itself as a growth partner for businesses looking to improve their sales and marketing efforts.