Boston · Growth · 41 people tracked
Also known as M33
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Investment thesis
M33 Growth focuses on partnering with ambitious, bootstrapped entrepreneurs, providing both capital and resources to accelerate growth and turn already-strong businesses into market leaders. The firm deliberately maintains a concentrated portfolio so each company receives meaningful attention rather than being one of many, and it typically acts as the active lead investor. The firm emphasizes the value of choosing the right partner and invites founders to review its investment criteria to assess fit.
Source: firm website, verified Sep 29, 2026.
Team · 41 people
from the firm's website & public directoriesFounder mafia
The M33 Growth mafia →7 people who came through M33 Growth went on to found or lead other companies.
What they invest in
from 14 of 19 portfolio companiesSaaS ×8Enterprise Software ×7AI & Machine Learning ×5Healthtech ×3Cleantech ×2Climate Tech ×2Cloud Computing ×2Consumer ×2
HQs:United States×8Australia×1Germany×1Ireland×1
Who they back
founder profiles across 8 portfolio companiesFounding team size:solo founder×32 founders×33 founders×14+ founders×1
Where their founders worked beforefrom 10 founders with career history
Cymtec Systems ×2General Catalyst ×2Google ×2Locu, Inc. ×2Mayfield Fund ×2
Investments · 19 tracked
founders shown can be your intro pathBy year:2025 · 12024 · 22021 · 12018 · 12014 · 16 dated
Tesla designs and manufactures electric vehicles, battery storage and solar products, and develops autonomous driving software.
Palo Alto, US
Elon Musk(Founder)inJeffrey B Straubel(Co-founder; CTO until 2019, Director since 2023)Martin Eberhard(Founder)inMarc Tarpenning(Founder)inJerome M Guillen(Executive Officer)inDeepak Ahuja(Executive Officer)
Co-investorsCapital Q® Ventures Inc.DBL PartnersDraper AssociatesFuture VenturesInfinite CapitalKluz Ventures+16 more
PerformLine provides compliance monitoring and AI-driven solutions for marketers across multiple channels, including web, email, social media, messaging, call recordings, and document review.
AI & Machine LearningEnterprise SoftwareMarketing TechSaaS
Alex Baydin(Founder)in
Co-investorsFirst Round CapitalSaaS Capital
SwiftComply provides compliance software that automates administrative workflows and data management for water utilities to help them enforce environmental regulations.
CleantechClimate TechFintechGovTechSaaSDublin, IE
Mick O'DwyerinMichael O'Dwyer(Founder)
Co-investorsArts AllianceBURNT ISLAND VENTURESHOWZAT PartnersPrefix CapitalTechstars
B12 offers an AI-powered website builder that generates a complete first draft of a website, online store, portfolio, blog, or web app from a text prompt, which users can then refine via an AI agent or visual editor.
AI & Machine LearningMarketing TechSaaS
Nitesh Banta(Founder)inAdam Marcus(Founder)in
Co-investorsFrancisco PartnersLightbankLux CapitalSuffolk Equity PartnersBrand Capital InternationalFounder Collective+6 more
Brighter operates the online provider directories for Cigna, giving healthcare providers (notably dental practices) a profile with photos, amenities, and verified patient reviews.
Digital HealthHealthtechMarketplaces
Jake Winebaum(Founder)in
Co-investorsDag VenturesGeneral Catalyst
CLEAResult delivers energy efficiency and conservation services to utilities, governments, and businesses across North America, helping clients achieve energy reduction and demand-side management goals.
CleantechClimate TechEnergyEnterprise SoftwareSaaSAustin, US
Rich McBee(President and CEO)inMatthew Childress(Chief Technology and Product Officer)in
Co-investorsGeneral Atlantic
project44 is a supply chain software company serving logistics and supply chain operations teams to improve visibility and efficiency across supply networks.
AI & Machine LearningEnterprise SoftwareLogistics & Supply ChainSaaSChicago, US
Jett McCandless(Founder)in
Co-investors8VCBtomorrow VenturesChicago VenturesCorsa VenturesCota CapitalEmergence Capital Partners+17 more
Cleverlayover helps travelers find cheaper flights by optimizing routes through layover cities, allowing them to visit additional destinations while saving money on airfare.
ConsumerSaaSTravel & Hospitality
PhilJohn
Datto provides cloud-based security and software solutions for Managed Service Providers (MSPs) serving small and medium businesses, including unified continuity, networking, endpoint management, and business management capabilities.
Cloud ComputingCybersecurityEnterprise SoftwareSaaSMiami, US
Austin McChord(Founder)inMichael Fass(Executive Officer)in
BoardStephen Herrod(Director)Holt McChord(Director)Paul Sagan(Director)Ian McChord(Director)
Co-investorsGeneral CatalystGolub GrowthVista Equity PartnersBenchstrength PartnersConnecticut Innovationsfuturepresent+8 more
Illumio provides a breach containment platform powered by AI security graphs that enables Zero Trust security across hybrid, multi-cloud environments.
AI & Machine LearningCloud ComputingCybersecurityEnterprise SoftwareSunnyvale, US
Andrew Rubin(Founder)inPJ Kirner(Founder)in
BoardSteve Herrod(Director)Alan Cohen(Executive Officer, Director)inJoe Lonsdale(Director)inJohn M. Jack(Director)in
Co-investors8VCAbbhi CapitalAccelAliya Capital PartnersAndreessen HorowitzBlue Owl Capital+13 more
M33 Growth positions itself as a growth acceleration specialist that assists business builders in assembling and aligning teams aligned with founder values.
Enterprise SoftwareFuture of Work
Manduka designs and sells yoga equipment including mats and accessories, with a focus on product quality and environmental responsibility.
ConsumerDirect to ConsumerSports TechWellness & Fitness
Peter Sterios(Founder)in
Co-investorsBuilders FundValor Equity Partners
Oceans Healthcare operates behavioral health hospitals and programs for patients of all ages, with a centralized support model based in Texas.
Digital HealthHealthtechMental HealthPlano, US
Stuart Archer(CEO)
Co-investorsHLM Investment PartnersValspring Capital
OM1 develops AI-powered analytics and data infrastructure for healthcare organizations to measure patient outcomes, predict health trajectories, and accelerate medical research using real-world clinical data.
AI & Machine LearningData & InfrastructureHealthtechMedical DevicesBoston, US
Richard Gliklich, MD(Founder)Richard E. Gliklich(Executive Officer, Director)Richard Gliklich(Founder)
BoardRory O'Driscoll(Director)inLarry Bohn(Director)David Barrett(Director)
Co-investors7wire VenturesBreyer CapitalCorewell Health VenturesGeneral CatalystScale Venture PartnersPolaris Partners
Otto develops fraud detection and revenue management software for the broadcasting and digital media sectors.
Memphis, US
Josh Summitt(Founder)in
Co-investorsGlasswing VenturesLas Olas Venture CapitalTech Square VenturesPravega Ventures
Total Synergy provides project management and resource allocation software designed for architecture and engineering firms to manage team availability, assign staff to tasks, and track project finances.
Construction TechEnterprise SoftwareSaaSNot stated, AU
Co-investorsPerennial Partners
Other
Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.
AxiumDatalogixOgsystems
Exits · 3
1 IPOs · 2 acquisitions · showing 2Portfolio news
latest coverage across their companiesTotal Synergy · totalsynergy.com · Jul 2, 2026
Public market activity · per SEC filings
what is this? ⓘDisclosed stake · filed Sep 2022
Disclosed stake · filed Nov 2021
6 insider ownership filings (Forms 3/4/5)
at Oncology Institute, Inc. (TOI)
From the firm's own SEC EDGAR filings — stakes and insider roles in public companies, typically portfolio companies after an IPO. Not a portfolio list published by the firm.
Frequently asked questions
- How many investments has M33 Growth made?
- M33 Growth has 19 tracked investments, 3 of which have exited, including 2 dated in the last 24 months.
- What stage does M33 Growth invest at?
- M33 Growth invests at the Growth stage.
- What sectors does M33 Growth focus on?
- M33 Growth focuses on AI & Machine Learning, Enterprise Software, Healthtech, SaaS, Sector Agnostic.
- Where is M33 Growth located?
- M33 Growth is headquartered in Boston, US.
- Does M33 Growth lead rounds?
- Yes, M33 Growth leads investment rounds.
- Who does M33 Growth co-invest with?
- M33 Growth most often shares deals with General Catalyst, 8VC, Breyer Capital, among 68 tracked co-investors.
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