Mainsail Partners
Overview
Mainsail Partners is a growth equity firm that invests in bootstrapped B2B software companies to help them realize their full potential. Mainsail's team is purpose-built to include experienced investors and software operators who help founders build great teams, develop industry-leading products, design data-driven and scalable infrastructure, and grow market share. Mainsail's hands-on support and best practices are delivered with a collaborative approach that respects founder-led cultures and helps build on each company's commitment to its people and customers. With offices in Austin and San Francisco, Mainsail Partners has raised nearly $4 billion in committed capital and partnered with 100+ companies over the last 22+ years.
Investments
| Company | Date | Stage | Lead |
|---|---|---|---|
| Steelhead Technologies | Dec 2025 | Growth Equity | Lead |
| FieldFlo | Oct 2025 | Growth Equity | Lead |
| Flyntlok | Oct 2025 | Growth Equity | Lead |
| PlanHub | Sep 2025 | Private Equity | Co-investor |
| Life Safety Inspection Vault | Aug 2025 | Growth Equity | Lead |
Key People
C. Jason Payne
Co-founder Senior Advisor
Chris Cassidy
Operating Partner
David Farsai
Partner
Jason Frankel
Partner
Michael Anderson
Partner
Phil Stern
Partner
William Salisbury
Partner, Chief Financial Officer And Chief Compliance Officer
Anthony Hayes
Principal
KC Wulff
Principal
Andrew Fay
Software Investor
Gary Shetye
Software Investor
Justin Streicher
Software Investor
Richie Hrncir
Software Investor
Sector & Stage Mix
Industry, funding stage, and valuation band breakdowns.
