Mainsail Partners

Founded in 2003, Mainsail Partners is a growth equity firm that invests in bootstrapped, founder-led B2B software companies. With offices in San Francisco and Austin, the firm provides both capital and hands-on operational support through its dedicated in-house team to help companies accelerate growth and scale efficiently.

Mainsail takes a strategic approach, targeting companies with proven revenue models and strong customer bases. Rather than just providing funding, it partners closely with management teams to enhance operations, drive revenue growth, and build long-term value. To date, Mainsail has invested in more than 60 companies.

The firm primarily focuses on the software, technology-enabled services, and healthcare sectors. Mainsail typically invests in companies generating $4M to $25M in revenue, offering capital investments ranging from $10M to $75M. With over $2.2 billion in assets under management, it continues to support high-growth businesses across North America.