QuestMark Partners
Growth equityEllicott City Β· GrowthβLate Stage Β· 2 people tracked
Also known as QUESTMARK MANAGEMENT COMPANY, LLC
Investment thesis
QuestMark is a private investment firm organized in 1998 by Ben, drawing on his background at Alex. Brown & Sons, to invest in emerging growth companies under the same original criteria and objectives it maintains today.
Source: firm website, verified Aug 25, 2026.
Team Β· 2 people
from public directories
What they invest in
from 21 of 46 portfolio companiesHardware Γ7SaaS Γ7AI & Machine Learning Γ5Enterprise Software Γ4Healthtech Γ4Marketing Tech Γ4Medical Devices Γ4Consumer Γ3
HQs:United StatesΓ14
Who they back
founder profiles across 9 portfolio companiesFounding team size:solo founderΓ42 foundersΓ23 foundersΓ24+ foundersΓ1
Investments Β· 46 tracked
founders shown can be your intro pathBy year:2022 Β· 12016 Β· 12015 Β· 22012 Β· 15 dated
Align Technology is a medical device company that makes clear aligners (the Invisalign System) and intraoral scanners for orthodontic and restorative dental treatment.
HardwareHealthtechMedical DevicesMorrisville, US
Teladoc Health operates a virtual care platform connecting patients with care providers for medical care, mental health, and chronic disease management services.
Digital HealthHealthtechMental HealthPurchase, US
Michael King(Executive Officer)inMark Hirschhorn(Executive Officer)inJason Gorevic(Executive Officer, Director)inKevin Williamson(Executive Officer)inAdam Vandervoort(Executive Officer)inDaniel Trencher(Executive Officer)in
Co-investorsCardinal PartnersDria VenturesHarmonic Growth PartnersHLM Venture PartnersKleiner PerkinsNew Capital Partners+2 more
Rhythm connects brand advertisers with mobile audiences by selling video, rich media, and immersive advertising formats across a portfolio of 200+ premium media properties.
AdTechMarketing TechMedia & Entertainment
Co-investorsLightspeed Venture PartnersRembrandt Venture PartnersUnion Grove Venture Partners
Adara provides a data platform offering over 1 billion digital identities and pre-built audience segments to enable brands and agencies to execute programmatic advertising campaigns across multiple DSPs and media channels.
AdTechAI & Machine LearningData & InfrastructureMarketing TechTravel & Hospitality
Co-investorsAugust Capital
ADVA, combined with Adtran, provides networking solutions and equipment aimed at helping organizations scale and operate their networks with less complexity.
Data & InfrastructureEnterprise SoftwareHardware
Airship (Urban Airship) provides a cross-channel, mobile-first customer experience platform with AI-powered orchestration, in-app messaging, push notifications, and journey automation.
AI & Machine LearningMarketing TechSaaS
Co-investorsAugust CapitalTransmedia Capital
Co-investorsCalifornia Technology Ventures
Applause provides fully managed software testing services that combine a global community of over 1.5 million testers with AI and automation to validate web, mobile, and AI-powered applications.
AI & Machine LearningEnterprise SoftwareSaaS
Doron Reuveni(Founder)in
Co-investorsHarmonic Growth PartnersUpper90Wessel ManagementCredit SuisseGoldman SachsLongworth Venture Partners+1 more
An online and in-person used bookstore selling gently used books, CDs/music, and movies/DVDs, with bundle deals and bargain pricing for general readers.
Circular EconomyConsumerE-commerce
Ceres Investor Network is a membership network of institutional investors β including pension funds, foundations, endowments, family offices, and asset managers β focused on responsible investment practices related to climate, water, and nature.
CleantechClimate TechImpact & Social Good
Mindy Lubber(CEO and President)
Co-investorsXTX Markets
Co-investorsTransmedia Capital
Leading provider of web application vulnerability assessment and compliance solutions.
Co-investorsConvergeSummit Partners
The site at this domain is a consumer guide to online casinos in Florida, publishing reviews, rankings, and explanations of gambling laws, bonuses, payment methods, and responsible play.
Media & EntertainmentSan Mateo, US
Anukool Lakhina(Executive Officer, Director)
BoardJose Suarez(Director)Amit Shah(Director)Brian Wilcove(Director)Andrew Fligel(Director)Michael LaJoie(Director)
Co-investorsTransLink CapitalArtiman VenturesGoldman SachsIntel CapitalSingTel Innov8 Pte Ltd.Sofinnova Ventures
InsideSales offers the Revenue Acceleration Cloud, a platform providing data, insights, and tools for enterprise revenue and sales teams to drive growth.
AI & Machine LearningSaaSSales TechProvo, US
KENNETH KROGUE(Executive Officer, Director)DAVID ELKINGTON(Executive Officer, Director)KEN KROGUE(Executive Officer, Director)inJOSHUA JAMES(Director)
BoardDAFINA TONCHEVA(Director)inMARK GORENBERG(Director)in
Co-investorsEPIC VENTURESHummer Winblad Venture Partners (HWVP)US Venture PartnersZetta Venture Partners
Commercializing rapid DNA analysis technology for forensics; acquired by Thermo Fisher Scientific in 2018.
BiotechHardwareMedical Devices
Co-investorsLatterell Venture Partners
Align Technology develops dental technology for orthodontic treatment, including clear aligners and intraoral scanners used to straighten teeth.
HardwareHealthtechMedical Devices
Co-investorsKleiner Perkins
Las Vegas, US
Mio Babic(Executive Officer, Director)
BoardMartin Rubin(Director)Vincent Otto(Director)Bud Albers(Director)
KeyMe operates automated kiosks using robotics and machine learning to provide key duplication and locksmith services, complemented by a nationwide network of locksmiths serving consumers and businesses.
AI & Machine LearningConsumerHardwareSaaSHebron, US
Greg Marsh(Founder & President)inMichael Katz(Director)Gregory Marsh(Executive Officer, Director)Kristopher Borer(Executive Officer)
BoardChristian Hernandez Gallardo(Director)Michael Brown(Director)in
Co-investorsBattery VenturesBrentwood AssociatesComcast VenturesEvolution VC PartnersHarmonic Growth PartnersLifeX Ventures+4 more
Press release distribution business whose marketwired.com domain now serves GlobeNewswire's newswire and media outreach services.
Marketing TechMedia & EntertainmentSaaS
Co-investorsOMERS Private Equity Inc.
Acquired by Clearlake Capital Group.
Co-investorsH.I.G. Capital
Peloton offers connected fitness equipment and a subscription app providing personalized workouts, strength training programs, and community features.
ConsumerSports TechWellness & Fitness
Co-investorsGrace Beauty CapitalKleiner Perkins
Working capital management platform offering payables, receivables and inventory solutions with supply chain financing, operating as SAP Taulia.
San Francisco, US
Bertram Meyer(Director)inPhilip Stehlik(Director)Betram Meyer(Executive Officer, Director, Promoter)Marcus Ament(Executive Officer, Promoter)Cedric Bru(Chief Executive Officer and President)Rene Ho(Chief Financial Officer)
Co-investorsActivant CapitalBlue Lion GlobalCohen CircleDag VenturesHarmonic Growth PartnersPropel Venture Partners+5 more
Pleasanton, US
SIMON EDWARDS(Executive Officer)SOPHIE AMES(Executive Officer)ELIZABETH CARTER(Executive Officer)DAVID KAHLEY(Executive Officer)AMIT JAIN(Executive Officer)NEIL BARUA(Executive Officer, Director)
Co-investorsCross Creek AdvisorsCrosslink CapitalEmergence Capital PartnersHarmonic Growth PartnersKleiner PerkinsMayfield Fund+3 more
Cvent Event Diagramming is a collaborative platform for event planning that helps planners and venues design event spaces, manage seating and layouts, and communicate in real-time.
B2B MarketplacesSaaSTravel & HospitalityWashington, US
Dan Berger(Chief Executive Officer)Matthew TendlerTrevor Lynn(Director)
BoardBrian Matthews(Director)Alex Ferrara(Director)inEd St. Onge(Director)
Co-investors500 GlobalBessemer Venture PartnersFortify VenturesHarmonic Growth PartnersK Street Capital
Co-investorsBaseline VenturesFounderPartnersTransmedia Capital
Vapotherm manufactures high-velocity therapy devices for respiratory distress treatment across patient populations.
HardwareHealthtechMedical DevicesExeter, US
JOSEPH ARMY(Executive Officer, Director)JOHN LANDRY(Executive Officer)in
BoardANTHONY ARNERICH(Director)JASON LETTMAN(Director)GEOFF PARDO(Director)SAMUEL BRASCH(Director)
Co-investorsCross Creek AdvisorsKaiser Permanente Ventures3x5 Partners
Venafi, now part of CyberArk as CyberArk Machine Identity Security, provides machine identity security including certificate lifecycle management, enterprise PKI, workload identity management, secure code signing, and SSH security.
Cloud ComputingCybersecurityEnterprise Software
Co-investorsDelta-v CapitalHarmonic Growth PartnersMercato PartnersNextEquity PartnersTop Corner CapitalIntel Capital
Vidyo, owned by Enghouse Video, provides secure cloud-based video conferencing and enterprise video management solutions across healthcare, finance, education, government, and other industries.
Cloud ComputingDigital HealthSaaSHackensack, US
Ofer Shapiro(Director)inStephen Lehman(Executive Officer)Eran Westman(Executive Officer, Director)inDavid Kaminsky(Executive Officer)in
BoardAl Schuele(Director)Doug Carlisle(Director)in
Co-investorsKaiser Permanente VenturesLuminari CapitalMenlo VenturesRho Ventures
Bethesda, US
Rodney Rogers(Executive Officer, Director)Kevin Reid(Executive Officer, Director)
BoardAlan Taetle(Director)John Siegel(Director)Patrick Hendy(Director)Donald Whittington(Director)
Co-investorsColumbia CapitalEscalate Capital PartnersIntel CapitalNoro-Moseley Partners
Enterprise SoftwareHardwareIoTThousand Oaks, US
Dirk I. Gates(Executive Officer, Director)Patrick Parker(Executive Officer)Shane Buckley(Executive Officer, Director)Steven F. DeGennaro(Executive Officer)
BoardSteven M. Krausz(Director)Eric Young(Director)
Co-investorsAugust CapitalCanaan Partners
Exits Β· 5
IPOs and acquisitions across the tracked portfolioAlign TechnologyNASDAQ: ALGNHealthcare AquiredNYSE: TDOCIntegenX Websiteacq. by Thermo Fisher ScientificMarketwiredacq. by Nasdaq (merged into GlobeNewswire, now Notified)Xirrusacq. by Cambium Networks
Portfolio news
latest coverage across their companies
Healthcare Aquired Β· kalkinemedia.com Β· Jul 17, 2026
Applause Β· intelligence360.news Β· Jul 14, 2026
Vapotherm Β· ad-hoc-news.de Β· Apr 18, 2026
Frequently asked questions
- How many investments has QuestMark Partners made?
- QuestMark Partners has 48 tracked investments, 3 of which have exited via acquisition or IPO.
- What stage does QuestMark Partners invest at?
- QuestMark Partners invests at the Growth, Late Stage stages.
- What is QuestMark Partners's typical check size?
- QuestMark Partners typically writes checks of $5M β $15M.
- What sectors does QuestMark Partners focus on?
- QuestMark Partners focuses on Consumer, Cybersecurity, Data & Infrastructure, Enterprise Software, Fintech, Healthtech, Medical Devices, SaaS.
- Where is QuestMark Partners located?
- QuestMark Partners is headquartered in Ellicott City, US.
- Who does QuestMark Partners co-invest with?
- QuestMark Partners most often shares deals with Harmonic Growth Partners, Kleiner Perkins, Transmedia Capital, among 97 tracked co-investors.
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