Mainsail Partners VII

About Mainsail Partners VII

Mainsail Partners VII is a venture capital firm based in United States, focusing on Series A stage investments. The fund actively supports founders building innovative solutions in AI/ML, SaaS, providing strategic guidance and capital to help startups scale.

Investment Focus

Location / RegionUnited States

Funding StageSeries A

Industry Focus

Ai Ml

Saas

Investor Signals Profile

active

Sweet Spot

Bootstrapped B2B SaaS founder ready for growth equity

B2B SaaS

Growth Equity

Bootstrapped

AI-enabled software

Founder-led

Bullish Signals

100+ software companies worked withexternal

$84M deal: Steelhead Technologiesexternal

Dedicated AI & Growth operator teamexternal

Strong bootstrapped founder testimonialsexternal

2025 milestones: growth & AI innovationexternal

Multi-vertical portfolio: landscaping, vet, MFGexternal

AI Launch Labs: fully agentic supportwebsite

Helps founders scale talent & culturewebsite

Portfolio: ResMan, JobNimbus, ProShop, Instinctwebsite

Contrarian Signals

Concentrated portfolio — selective accessexternal

Bootstrap-only thesis limits pipelineexternal

GTM readiness required pre-AI launchwebsite

Founder Do's

Be bootstrapped & founder-led

Show B2B software focus

Align on culture & values

Have clear market leadership path

Embrace AI in product

Founder Don'ts

Don't come pre-VC-backed

Don't pitch consumer or non-software

Don't overlook culture fit

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Fund Overview

Fund Size$1535M

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Website

Key People

Gavin Turner, Jason Ayne