Mainsail Partners | 13,631 followers on LinkedIn. Investing in bootstrapped B2B software companies to help them realize their full potential. | Mainsail Partners is a growth equity firm that invests in bootstrapped B2B software companies to help them realize their full potential. Our team is purpose-built to include experienced investors and software operators who help founders build great teams, develop industry-leading products, design data-driven and scalable infrastructure, and grow market share. Mainsail’s hands-on support and best practices are delivered with a collaborative approach that respects founder-led cultures and helps build on each company’s commitment to its people and customers.