Mainsail Partners is a growth equity firm that invests in bootstrapped. See sector focus, stage focus and contact routes.
Mainsail Partners is a growth equity firm that invests in bootstrapped, founder-led B2B software and AI-enabled companies, typically targeting those with $4M–$25M in revenue and offering check sizes of $10M–$75M[2][8]. The firm focuses on vertical SaaS, fintech, healthcare IT, infrastructure/security software, and select horizontal SaaS, with a distinctive thesis centered on high-touch, culture-first support to help these companies scale into market leaders[2][3][10]. Notable portfolio companies include Apptega, Teamfront, and MirrorWeb, reflecting their concentration in enterprise applications and fintech[4][5].
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