Mainsail Partners
Growth equityAustin · Growth · 107 people tracked
Also known as MAINSAIL MANAGEMENT COMPANY, LLC
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Investment thesis
Mainsail Partners focuses on growth equity investments in B2B software and AI-enabled businesses, particularly companies that have been bootstrapped by their founders. The firm positions itself as a hands-on partner helping these companies scale into vertical market leaders, emphasizing operational support and long-term collaboration with founding teams.
Source: firm website, verified Sep 29, 2026.
Team · 107 people
from the firm's website & curated & public directoriesFounder mafia
3 people who came through Mainsail Partners went on to found or lead other companies.
What they invest in
from 30 of 65 portfolio companiesSaaS ×24Enterprise Software ×18AI & Machine Learning ×8Fintech ×8Logistics & Supply Chain ×4PropTech ×4E-commerce ×3HR Tech ×3
HQs:United States×19United Kingdom×1India×1Singapore×1
Who they back
founder profiles across 14 portfolio companiesFounding team size:solo founder×122 founders×2
Investments · 65 tracked
founders shown can be your intro pathBy year:2025 · 32024 · 52022 · 32021 · 52019 · 12016 · 12015 · 12014 · 120 dated
Brilliant Earth is an online jewelry retailer focused on sourcing and selling ethically-produced gemstones and precious metals.
ConsumerDirect to ConsumerE-commerceImpact & Social GoodSan Francisco, US
Beth Gerstein(Co-Founder & CEO)inEric Grossberg(Co-Founder)
Co-investorsRunway Growth Capital
SmartMoving provides software and operational guidance for moving companies, offering sales automation, dispatch management, customer experience tools, and financial management solutions.
Enterprise SoftwareLogistics & Supply ChainSaaSDallas, US
Extensiv (3plcentral.com) provides a cloud warehouse management system (WMS) for third-party logistics (3PL) providers, with tools for inventory tracking, fulfillment automation, labor analytics, and multi-location network management.
Logistics & Supply ChainSaaS
Co-investorsGrowth Street Partners
Provides cybersecurity compliance software that unifies security processes, tracking, and reporting across multiple frameworks.
Atlanta, US
Jacob Ferro(Director)
BoardMike Dowdle(Director)inArmistead Whitney(Executive Officer, Director)in
Co-investorsCircadian VenturesGRA VentureGray Ventures
Aspire provides corporate account and card solutions for businesses with complex operations, offering relationship management and an online platform for employee spending oversight.
Enterprise SoftwareFintechSaaSSingapore, SG
Andrea Baronchelli(Founder/CEO)inGiovanni Casinelli(Founder)inGiacomo Ficari(Co-Founder (former Co-CEO))inJoel Leong(Co-Founder & Chief Strategy Officer)inSG Andrea Baronchelli(Founder/CEO)Stefano Pellegrino(Co-Founder (former Vietnam country head))in
Co-investorsBeacon VCCrane Venture PartnersHummingbird VenturesInsignia Ventures PartnersLightspeed Venture PartnersPICUS CAPITAL+26 more
Aspire offers short-term personal loans of up to ₹5,00,000 repaid in weekly instalments over a tenure of up to 25 weeks, with reducing-balance interest.
FintechBengaluru, IN
Manoj Kumar Rathi(Co-Founder)inTushar Viswanath Garimalla(Co-Founder)in
Co-investorsPICUS CAPITALUpsparks CapitalCapital-AFasanara CapitalHummingbird VenturesLGT Capital Partners+3 more
Aspire is an influencer marketing platform that helps brands build communities of ambassadors, influencers, and affiliates to promote products at scale.
Creator EconomyE-commerceMarketing TechSaaS
Co-investors515 VenturesAspenwoodCota CapitalPear VCStructural CapitalBattery Ventures+14 more
Boostlingo is an all-in-one language services platform that combines human interpreters and AI to provide interpreting, translation, and multilingual event support, including video remote interpreting, over-the-phone interpreting, and AI-generated captions.
AI & Machine LearningEnterprise SoftwareSaaS
Bryan Forrester(Co-founder)in
CourtReserve provides a league management platform for pickleball players and organizers, automating registration, scheduling, and results tracking.
B2B MarketplacesEnterprise SoftwarePropTechSaaSSports Tech
Extensiv provides software for omnichannel fulfillment, enabling brands and third-party logistics (3PL) providers to coordinate warehouse operations and order management.
E-commerceEnterprise SoftwareLogistics & Supply ChainSaaS
Co-investorsFJ LabsRunway Growth Capital
Fexa provides facilities management software for businesses with multiple locations, enabling teams to oversee properties, staff, operations, and compliance across their portfolio.
AI & Machine LearningEnterprise SoftwarePropTechSaaS
Marc Balzamo(Founder)in
Flight Schedule Pro is a scheduling and management platform for aviation schools and flight training operations.
EdTechEnterprise SoftwareSaaS
Jasen Barnes(Founder)in
Anchorage, US
Sean McLaughlin(Chief Executive Officer, President, Treasurer)inDavid Hoffman(Vice President and Secretary)
BoardSteven Murray(Director)Laura McLaughlin(Director)
Fullbay is cloud-based management software for heavy-duty truck, trailer, and diesel repair shops, covering repair tracking, labor and clock management, parts inventory, invoicing, and electronic payments.
Logistics & Supply ChainMobility & TransportationSaaS
Co-investorsJMI Equity
Inspect Point provides a software platform designed specifically for fire and life safety contractors to manage inspections, compliance workflows, service delivery, and customer relationships in a single system.
AI & Machine LearningEnterprise SoftwareSaaS
Jennifer Doyle(Founder)in
LinenMaster Payments is an electronic payment collection platform that allows businesses to bill customers and receive revenue faster while reducing administrative overhead.
Enterprise SoftwareFintechSaaS
MirrorWeb provides digital communications oversight and compliance solutions for regulated industries.
AI & Machine LearningCybersecurityEnterprise SoftwareFintechGovTechLegalTechManchester, GB
Philip Clegg(CTO and co-founder)in
Co-investorsMaven Capital Partners
Ncontracts provides risk management and compliance software for financial organizations, combining AI-powered tools with expertise from former regulators and compliance professionals.
AI & Machine LearningEnterprise SoftwareFintechLegalTech
Michael Berman(Founder)in
Co-investorsGrowth Street PartnersGryphon
Catalis (formerly nCourt) provides government technology and SaaS solutions for courts, tax and property assessment, payments, permitting, and citizen engagement, serving state and local government agencies across North America.
FintechGovTechSaaSAlpharetta, US
Co-investorsGrowth Street Partners
PeopleAdmin provides a cloud-based software platform designed to manage institutional processes for higher education institutions, including talent management, academic affairs, and student outcomes analytics.
Cloud ComputingEdTechEnterprise SoftwareHR TechSaaS
Co-investorsGrowth Street Partners
PayLease (rebranded to Zego in 2020) provides a property management automation platform for payments, utility management, and resident engagement.
FintechPropTechSaaS
Ty Kalklosch(Founder)inNate Taylorin
Co-investorsFrancisco PartnersGrowth Street Partners
PeraHealth offers the Rothman Index, an FDA-cleared AI predictive analytics system that extracts and analyzes clinical measurements from the EMR to detect patient deterioration early and produce an aggregated score of a patient's physiological condition.
AI & Machine LearningDigital HealthHealthtech
Co-investorsKeiretsu Forum
Estero, US
David J Borden(Executive Officer, Director, Promoter)inJames C Carter(Executive Officer, Director, Promoter)Jonathan R Ewen(Executive Officer, Director, Promoter)
Lakewood, US
Ori Staub(President and Chief Technology Officer)inJohn Gadeken(President, Chief Operating Officer and Secretary)inJessica Davis(Director)
BoardErick Tonkyn(Director)Elodie Dupuy(Director)in
Co-investorsFull In Partners
Skimmer is an all-in-one pool service management platform with web and mobile apps for scheduling technicians, optimizing service routes, billing, customer management, and automated service report emails.
SaaSAustin, US
Peter Freeland(Executive Officer, Director)Shane Skiffington(Director)Roger Kafker(Director)Jack Nelson(Executive Officer, Director)
Sourcescrub provides a data and machine learning platform for investment sourcing and deal flow in private markets, helping dealmakers identify, screen, and prioritize acquisition or investment targets.
AI & Machine LearningData & InfrastructureFintechSaaSSan Francisco, US
TylerPrescott
Co-investorsFrancisco Partners
Steelhead provides production visibility and management software for manufacturing operations, enabling real-time tracking of parts, profitability, productivity, and quality through operator workboards and granular production data.
Advanced ManufacturingEnterprise SoftwareSaaSCalumet, US
Jeffrey Halonen(Executive Officer, Director)
BoardJustin Moore(Director)inJay Po(Director)Brent Halonen(Director)
Co-investorsInnovius CapitalStage 2 CapitalTIA VenturesC2 VenturesStage Capital
Syncro provides software that analyzes internal communications and organizational culture for insights about workplace dynamics and employee engagement.
Enterprise SoftwareHR TechSan Francisco, US
Brian Chan(Founder)
Co-investorsimec.istartY Combinator
Syncro is a technology platform designed for IT professionals and managed service providers (MSPs) that combines automation, security operations, and AI capabilities to help IT teams bridge the skills gap and improve operational efficiency.
AI & Machine LearningCybersecurityDeveloper ToolsEnterprise SoftwareSaaS
Michael George(Chief Executive Officer)inKristen Costagliola(Chief Technology Officer)inChad Lindsey(Chief Revenue Officer)inNicole DeBourg-Kahn(Chief People Officer)inCarl Koussan-Price(Chief Marketing Officer)inDee Zepf(Chief Product Officer)in
Zen Planner provides all-in-one business management software for fitness studios and gyms, featuring membership management, class scheduling, payment processing, and member communication tools.
Future of WorkHealthtechHR TechSaaSSports TechWellness & Fitness
Other
Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.
Mint Aggregator LPNexus Systems HoldingsBio OptronicsCash Management SolutionsCenterbaseEsecuritelFairwarningFieldroutesForensic LogicFusionGtreasuryInn FlowIps LearningJobnimbusLivM A Com Technology Solutions IpoNexus SystemsNovus BiologicalsPath LogicPlaymaker HealthProfessional HealthcareProshopRed Oak Compliance SolutionsSentryoneSteelwedge SoftwareTeamfrontThe Bar MethodTogos
Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.
Exits · 1
1 IPOsBrilliant EarthNASDAQ: BRLT
Portfolio news
latest coverage across their companiesSteelhead Technologies · finsmes.com · Dec 11, 2025
Frequently asked questions
- How many investments has Mainsail Partners made?
- Mainsail Partners has 65 tracked investments, 1 of which have exited, including 4 dated in the last 24 months.
- What stage does Mainsail Partners invest at?
- Mainsail Partners invests at the Growth stage.
- What is Mainsail Partners's typical check size?
- Mainsail Partners typically writes checks of $10M – $75M.
- What sectors does Mainsail Partners focus on?
- Mainsail Partners focuses on AI & Machine Learning, Cybersecurity, Enterprise Software, Fintech, Healthtech, SaaS.
- Where is Mainsail Partners located?
- Mainsail Partners is headquartered in Austin, US.
- Does Mainsail Partners lead rounds?
- Mainsail Partners has led 3 of the 14 rounds where its role is on record.
- Who does Mainsail Partners co-invest with?
- Mainsail Partners most often shares deals with Growth Street Partners, Francisco Partners, Runway Growth Capital, among 18 tracked co-investors.
Media · Podcasts & interviews
featuring the teamImages
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