Mainsail Partners
2026-08-31mainsailpartners.com
Overview
What they do
Mainsail Partners is a growth equity firm that partners with bootstrapped software company founders to help them scale and grow. The firm focuses on supporting these software businesses to become market leaders. Mainsail is trusted by founders seeking both capital and operational support to accelerate growth.
mainsailpartners.com
What they look for
Mainsail targets founder-owned, bootstrapped B2B software and AI-enabled companies with proven business models, recurring revenue, high gross margins, and high retention rates.
mainsailpartners.com
Stage
Series B+
mainsailpartners.com
Sectors
SaaS, AI, Fintech, Cybersecurity, Healthcare
mainsailpartners.com
Based
San Francisco, US
mainsailpartners.com
Sources
2026-08-31mainsailpartners.comMainsail Partners is a growth equity firm investing in B2B software and AI-enabled companies.
2026-08-31mainsailpartners.comInvestment Criteria Founder Owned B2B Software Rapid Growth $10-$75M Equity Investments US or…
Portfolio, cheque size and the rest
The 14 companies they have backed that we can see, the cheque they write, and whether they are deploying right now.
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