Mainsail Partners

Mainsail Partners is a growth equity firm that focuses exclusively on bootstrapped, founder-led business-to-business software companies in North America. The firm targets companies with proven, capital-efficient business models, strong recurring revenue characteristics, and significant potential for accelerated growth, committing between $10 million and $75 million of equity capital per transaction in businesses generating annual revenues of approximately $4 million to $25 million. Transaction types include growth equity investments, recapitalizations, and buyouts, with the firm typically acquiring majority ownership or significant equity stakes in its portfolio companies. Mainsail's investment team includes both investors and software operators who work alongside founders to support team building, product development, go-to-market strategy, and data-driven infrastructure. The firm's sector focus spans vertical SaaS, healthcare technology, financial technology, and other enterprise software categories across the United States and Canada. Founded in 2003, the firm maintains offices in San Francisco, California, and Austin, Texas, United States.