| # | Company | Employees |
|---|---|---|
| 1 |
HarbourVest Partnersharbourvest.com
An independent global private markets firm with over 40 years of experience managing $117 billion in assets, offering diverse investment opportunities worldwide |
1,443 |
| 2 |
Summit Partnerssummitpartners.com
Global investment firm focusing on growth equity, fixed income, and public equity across technology, healthcare, and diverse growth sectors. |
588 |
| 3 |
MassChallengemasschallenge.org
A global organization supporting entrepreneurs to innovate and drive sustainable change, with headquarters in the United States and eight international locations |
504 |
| 4 |
Allied Mindsalliedminds.com
Early-stage investor in technology and life sciences, originating from US federally funded labs and universities, focusing on breakthrough science in connectivity, space, and medical devices |
400 |
| 5 |
Battery Venturesbattery.com
Invests globally in cutting-edge software, IT infrastructure, consumer internet, mobile services, and industrial technology companies at various growth stages. |
252 |
| 6 |
Building Industry Partnersbuildingip.com
A private equity firm focused on the US building industry, building exceptional businesses, generating strong returns, and supporting broad-based employee ownership |
229 |
| 7 | 200 | |
| 8 |
Underscore VCunderscore.vc
Early-stage venture capital firm in Boston supporting entrepreneurs with tailored community support to help meet their unique needs |
144 |
| 9 |
OpenViewopenviewpartners.com
OpenView, a venture capital firm, invests in expansion-stage business software companies, providing operational expertise to help them scale effectively. |
76 |
| 10 |
Glasswing Venturesglasswing.vc
An early stage investor focused on AI and frontier technology startups, supporting exceptional entrepreneurs from top academic institutions to foster growth |
75 |
| 11 |
Volition Capitalvolitioncapital.com
A growth equity firm investing in high-growth technology businesses with $5-50 million in revenue, focusing on software, Internet, and tech-enabled services companies |
57 |
| 12 | 54 | |
| 13 |
Companyon Venturescompanyon.vc
Venture capital firm investing in seed-funded B2B software startups, guiding them towards Series A funding and $10M in annual revenue through an immersive expansion program |
54 |
| 14 |
Solamere Capital, LLCsolamerecapital.com
Private equity firm established in 2008, specializing in investing in middle market companies with a focus on leveraging their extensive network of industry executives |
46 |
| 15 |
Catalyst Health Ventureschv.vc
A MedTech investment firm focusing on early-stage therapeutic devices, diagnostics, and digital health solutions that improve healthcare outcomes globally |
44 |
| 16 |
Riverside Partnersriversidepartners.com
Boston-based private equity firm investing in growth-oriented healthcare and technology companies in North America, with a focus on business building and value creation |
42 |
| 17 |
Fifth Down Capitalfifthdown.com
Investment firm focusing on private companies in internet, software, consumer, and fintech industries, supporting innovative individuals to shape the future |
40 |
| 18 |
Conjoin Groupconjoingroup.com
This company partners with Venture Capital and Private Equity firms, investing $250M to enhance portfolio company operations and drive revenue growth |
39 |
| 19 |
Asymmetricacp.vc
The company partners with disruptive tech companies, provides transparent capital, and relies on a network of operators to identify and support innovative ideas |
37 |
| 20 |
Guidepost Growth Equityguidepostgrowth.com
Growth equity firm specializing in partnering with technology companies in North America, providing capital, operational support, and strategic guidance for success |
36 |
| 21 |
Boston Harbor Angelsbostonharborangels.com
An angel investing group providing funding, guidance, and mentorship to early-stage companies in various industries to help them succeed and grow |
31 |
| 22 |
Elephantelephantvc.com
A venture capital firm investing in enterprise software, consumer internet, and mobile markets, driving growth and innovation in tech startups |
30 |
| 23 |
M|C Partnersmcpartners.com
Private equity firm investing in small and mid-size businesses in digital infrastructure and technology services, focusing on growth and long-term value creation |
30 |
| 24 |
Visible Handsvisiblehands.vc
Venture capital firm supporting underrepresented founders with funding, hands-on support, and community through investments, accelerators, fellowships, and retreats |
29 |
| 25 |
January Venturesjanuary.ventures
A VC fund focusing on angel/pre-seed investments in US & Europe, replacing friends & family rounds to support diverse, visionary founders |
27 |
| 26 |
K2 HealthVenturesk2hv.com
A healthcare-focused investment firm offering flexible, long-term financing solutions to innovative companies in life sciences and healthcare industries |
26 |
| 27 |
WestView Capital Partnerswvcapital.com
Private equity firm in Boston that focuses on lower middle market companies, providing equity investments tailored to shareholders' needs for various transactions |
25 |
| 28 |
Clearhaven Partnersclearhavenpartners.com
Private equity firm specializing in software-based technology companies in the middle market Focus on integrity, partnership, and delivering results |
25 |
| 29 |
Myriad Venture Partnersjobs.myriadventures.com
Early-stage venture firm investing in AI, B2B software, and clean technologies to shape the next generation of business solutions |
25 |
| 30 |
EAM (Equality Asset Management)equalityam.com
A growth-focused private equity firm providing equity capital and strategic support to technology and tech-enabled service companies for long-term growth |
24 |
| 31 |
Hastings Equity Partnershastingsequity.com
Private equity firm investing in North American founder-led companies in industrial and business services sectors to empower growth through strategic support and operational enhancement |
22 |
| 32 |
Stride Consumer Partnersstrideconsumer.com
Private equity firm partnering with founders to build consumer brands Provides growth equity in food & beverage, beauty, active lifestyle, and consumer services |
19 |
| 33 |
Boston Millennia Partnersbostonmillenniapartners.com
Private equity firm specializing in healthcare and life sciences investments, providing financing and expertise to high-growth companies for over 30 years |
18 |
| 34 |
Suffolk Technologiessuffolktech.com
Venture capital firm investing in startups revolutionizing construction and real estate with Suffolk's resources and expertise to drive technology innovation |
18 |
| 35 |
Cue Ball Capitalcueball.com
Venture capital firm focused on investing in entrepreneurs with great ideas, strong business fundamentals, and a shared culture for value-add partnerships |
17 |
| 36 |
MassMutual Venturesmassmutualventures.com
Funds enterprise SaaS, climate technology, fintech, cybersecurity, healthtech companies from seed to growth stage, providing capital and strategic access to resources. |
15 |
| 37 |
5th Line Capital5thline.co
A leading aggregator of specialized financial services for growth-stage companies, providing tailored solutions in financial operations, strategic planning, and non-dilutive capital raising |
14 |
| 38 |
Smith Point Capitalsmithpointcapital.com
A capital firm led by tech experts, specializing in partnering with innovative enterprise software companies to boost revenue, innovation, and market success |
14 |
| 39 |
Innospark Venturesinnospark.vc
Early-stage venture capital firm exclusively focused on AI, providing expertise, support, and an expansive network to technical founders, along with extensive experience and mentorship |
13 |
| 40 |
Romulus Capitalromuluscap.arkpes.com
Early-stage technology venture capital firm investing in brilliant entrepreneurs, focused on company-building and long-term partnerships for industry-leading ambitions |
13 |
| 41 |
Hyperplanehyperplane.vc
A company that partners with innovative founders using machine intelligence, sensor tech, and cloud computing to solve complex global challenges |
13 |
| 42 |
Saturn Partnerssaturnpartnersvc.com
A hands-on investor specializing in seed and early stage venture capital opportunities, with a focus on technology, energy, and biotechnology sectors |
12 |
| 43 |
AccelHUB Venture Partnersscaleuplabs.vc
This company invests in international startups with novel technologies, provides guidance for US market entry, and connects founders with resources for strong exits |
12 |
| 44 |
Palladin Consumer Retail Partners, LLCpcrp.com
Private equity firm based in Boston, specializing in consumer and retail companies in North America Focus on creating value through strategic initiatives and investments |
12 |
| 45 |
Cybernetix Venturescybernetix.vc
Investment firm specializing in early-stage robotics, automation, and AI startups, connecting them to global ecosystems and expertise. |
12 |
| 46 |
KSV Globalksvglobal.com
Boston-based investment firm specializing in growth equity investments in US, Europe, and Asia Experienced in various sectors seeking strong business models for robust growth |
11 |
| 47 |
Globespan Capital Partnersglobespancapital.com
Venture capital firm specializing in investing in startups in IT infrastructure, SaaS, mobile, and Internet industries to help them scale and realize their potential |
9 |
| 48 |
Breakaway Venturesbreakaway.com
This company invests in emerging consumer brands at a growth stage, providing capital and expertise to accelerate business growth and value creation |
8 |
| 49 |
Evans Capitalevanscapital.com
Private investment fund focusing on early-stage venture capital investments in technology, health care, and other growth industries Active, value-added investor in high performing venture funds |
8 |
| 50 |
MedScience Ventures, LLCmedscienceventures.com
A venture capital portfolio based in the US and Asia, specializing in investing in emerging technologies in the biotech and healthcare industries |
7 |
| 51 |
LiquidMetal Venturesliquidmetalvc.com
A Boston-based venture capital fund investing in early-stage startups in Energy, Biotech, AI Providing expert support, connections, and reducing portfolio risk |
7 |
| 52 |
Kendall Capital Partnerskcpventures.com
A venture capital firm located in Boston, Massachusetts that specializes in funding and supporting startups and early-stage companies |
6 |
| 53 |
Ascent Venture Partnersascentvp.com
Venture capital firm focused on investing in early-stage technology companies, partnering with entrepreneurs to build innovative market leaders Located in Boston, MA |
6 |
| 54 |
Advaita Capitaladvaitacap.com
The company invests in high-growth technology startups as a venture capitalist, focusing mainly on outliers within the US market |
6 |
| 55 |
Latticework Investment Grouplatticework.io
Private investment firm based in Boston with investments in education services, retail, and real estate |
5 |
| 56 |
186 Ventures186ventures.com
Early stage tech investors supporting agile teams tackling disruptive problems, providing operational & strategic support to high-growth tech startups across various industries |
5 |
| 57 |
Momentum Equity Partnersmomentumequity.com
Early stage venture capital firm partnering with tech platforms to build elite service companies Extensive domain expertise with successful portfolio ventures |
5 |
| 58 |
Water Bear Ventureswaterbearventures.com
Boston-based investment firm backing early-stage startups that are developing disruptive technologies with resilient teams Focus on Pre-Seed, Seed, and Series A funding rounds |
5 |
| 59 |
Kenston Capital Partnerskenstoncapital.com
Venture debt firm supports early-stage technology and healthcare companies through investments, focusing on innovation in these industries |
4 |
| 60 |
Four Cities Capitalfourcitiescapital.com
A venture capital firm investing in innovative startups such as Mashgin, Boom Supersonic, Relativity Space, and more, guided by experienced founders |
4 |
| 61 |
White Shark Managementwhitesharkmgmt.com
Private investment firm investing in innovative solutions and founders across various industries, aiming to create new standards and address pressing problems |
3 |
| 62 |
Jump Venturesjumpv.com
Scalability infusion firm specializing in strategic investments and long-term collaboration to bring disruptive ideas to life in businesses |
3 |
| 63 |
Spring Lake Equity Partnersspringlep.com
Boston-based private equity firm investing in later-stage technology-oriented companies, partnering with management teams to drive growth and create value for stakeholders |
3 |
| 64 |
SCG Capital Partnersscgcapitalpartners.com
Investing in early-stage technology managers, SCG Capital's Fund-of-Funds specializes in technology investments to drive growth and innovation |
3 |
| 65 |
Breakaway Venturesbreakawayventures.com
This company invests in emerging consumer brands at a point of growth, providing capital and expertise to accelerate business success |
2 |
| 66 |
Perkins Cove Partnersperkinscovepartners.com
Venture capital & advisory firm specializing in supporting early-stage technology companies |
2 |
| 67 |
General Purpose Venture Capitalgeneralpurpose.vc
Investing in companies with cutting-edge technologies in artificial intelligence, cybersecurity, data, and space, a venture capital firm supports innovation and growth |
2 |
| 68 |
Brooks Hill Partnersbrookshillpartners.com
A strategy consulting and investment firm focused on healthcare and technology sectors, partnering with and supporting passionate entrepreneurs for organic growth |
1 |
| 69 |
Tabard Venture Capitaltabardvc.com
Venture capital firm specializing in investing in AgTech 20 startups, focusing on technology companies involved in remote sensing, IoT, Big Data, and AI |
1 |
| 70 |
GVP Global Corpgvpglobalcorp.com
Venture capital and private equity firm founded in 2013, specializing in energy, biotechnology, fire detection, sensory technology, and nanotechnology sectors |
1 |
| 71 |
EduLab Capital Partnersedutech-lab.com
Early-stage venture capital firm focused on education market, providing support and expertise to startups for profitable growth through partnerships and artificial intelligence leverage |
1 |
| 72 |
Yellow Bear Capitalyellowbearcapital.com
A venture capital firm investing in early stage companies in climate tech, healthcare tech, Fintech, and AI, supporting diverse founders driving innovation |
1 |
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 9, 2026.
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