| # | Company | Employees |
|---|---|---|
| 1 |
HubSpothubspot.com
It provides a comprehensive CRM platform with marketing, sales, and service tools, fostering employee growth and a flexible workplace culture. |
12,229 |
| 2 |
Broad Institute of MIT and Harvardbroadinstitute.org
Multidisciplinary teams collaborate across labs and programs to address complex biomedical challenges in human biology and disease worldwide. |
3,204 |
| 3 |
Forresterforrester.com
Provides research, consulting, and events to help leaders use customer-focused insights and data to drive growth and navigate change. |
1,653 |
| 4 |
ConcertAIconcertai.com
Innovative AI-powered SaaS data company specializing in healthcare, experiencing rapid growth as a leader in the industry |
840 |
| 5 |
Flagship Pioneeringflagshippioneering.com
Innovative biotechnology company creating platform companies for transformative human health and sustainability products, with over 100 ventures in its ecosystem |
836 |
| 6 |
MIT Media Labmedia.mit.edu
An interdisciplinary creative playground at the intersection of academic rigor and transformative technology, focused on positive societal impact |
801 |
| 7 |
CapeStartcapestart.com
CapeStart provides AI innovation scaling services through data annotation, machine learning, and software development for various industries worldwide |
795 |
| 8 |
Harvard John A. Paulson School of Engineering and Applied Sciencesseas.harvard.edu
SEAS conducts collaborative research and education at the intersection of engineering, applied sciences, and technology to address global challenges and serve society |
600 |
| 9 |
ZoomRxzoomrx.com
A strategic healthcare consulting firm leveraging data, technology, and expertise to help shape therapy markets with collaboration, innovation, and deep analysis |
541 |
| 10 |
MacPaw 馃嚭馃嚘macpaw.com
Empowering 30 million MacOS/iOS users with technology through CleanMyMac and Setapp, offering innovative products for efficient device management |
514 |
| 11 | 510 | |
| 12 |
Cambridge Mobile Telematicscmtelematics.com
AI-driven platform identifying and reducing driving risks, partnering with insurers and automakers to prevent crashes and enhance road safety worldwide. |
477 |
| 13 |
Quantoriquantori.com
Quantori accelerates drug discovery and patient outcomes through cutting-edge data engineering, machine learning, cloud expertise, and healthcare data optimization services |
473 |
| 14 |
EverQuoteeverquote.com
A fast-growing technology company in Cambridge simplifying, personalizing, and making insurance more affordable through data, technology, and knowledgeable advisors |
432 |
| 15 | 424 | |
| 16 |
XtalPi Inc.en.xtalpi.com
A quantum physics-based, AI-powered drug R&D company revolutionizing drug discovery with integrated technology platform and support from renowned investors |
349 |
| 17 |
First Line Softwarefirstlinesoftware.com
It offers software engineering, digital transformation, and advisory services globally, specializing in retail, healthcare IT, machine learning, and data management. |
346 |
| 18 |
ReversingLabsreversinglabs.com
Provides a cybersecurity platform for file and software security, verifying safe binaries, and offering insights into the software supply chain. |
320 |
| 19 |
nferencenference.com
Leverages academic minds, researchers, and patient data to accelerate drug development, generate evidence, and improve clinical trials, offering comprehensive biological and clinical insights. |
314 |
| 20 |
DeepHealthdeephealth.com
An AI-powered subsidiary focused on healthcare informatics, DeepHealth aims to enhance care delivery by leveraging advanced AI technologies and personalized workflows |
307 |
| 21 |
Wistiawistia.com
It provides a video marketing platform for businesses to create, host, market, and measure video content effectively and collaboratively. |
206 |
| 22 | 199 | |
| 23 |
Kensho Technologieskensho.com
An engineering-driven company in Cambridge, MA, using AI to extract insights from messy data for critical business decisions |
189 |
| 24 |
MORSE Corpmorsecorp.com
A team of specialists in Cambridge providing innovative solutions for multi-disciplinary challenges in national security using AI, ML, and software development |
185 |
| 25 |
Anumanaanumana.ai
Utilizing AI and translational science, Anumana decodes electrical signals from the heart to enable earlier diagnoses and life-saving treatments in cardiac care |
183 |
| 26 |
Ketryxketryx.com
A risk-based platform for simplified FDA compliance and safety in regulated medical software development, using industry standards and familiar tools |
144 |
| 27 |
Implicityimplicity.com
Provides a universal cardiac remote monitoring and research platform to hospitals and clinics, enhancing remote care for cardiac patients. |
125 |
| 28 | 110 | |
| 29 |
b2wiseb2wise.com
Provides cloud-based Supply Chain Planning solutions using Demand Driven MRP and AI to optimize inventory, lead times, and planner efficiency for various industries. |
91 |
| 30 |
HiFiBiO Therapeuticshifibio.com
A multinational biotherapeutics company leveraging single-cell profiling technologies to develop antibody drugs for cancer and autoimmune disorders, fostering open-innovation partnerships |
35 |
| 31 |
Clozeai.cloze.com
It provides an automated platform for managing professional relationships, organizing contact details, interactions, and reminders without manual data entry. |
21 |
| 32 |
Novartis Sciencenovartis.com
A global team of over 6,000 professionals focusing on innovative drug discovery in various disease areas with key technology competencies |
16 |
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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 Nov 2, 2026.
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