| # | Company | Employees |
|---|---|---|
| 1 |
Toastpos.toasttab.com
Toast empowers restaurants with cloud-based software and hardware to streamline operations, drive revenue, and enhance guest experience through POS, marketing, and HR solutions |
7,762 |
| 2 |
Klaviyoklaviyo.com
Unified customer platform empowering brands with ownership of consumer data to automate personalized email/SMS communications, foster customer relationships, and drive growth |
2,902 |
| 3 |
Semrushsemrush.com
A leading online visibility management platform offering a suite of marketing tools to help companies improve their online presence and results |
2,357 |
| 4 |
OutSystemsoutsystems.com
Provides an AI development platform for enterprises to rapidly build custom applications and AI agents while modernizing legacy core business systems. |
2,228 |
| 5 | 1,557 | |
| 6 | 1,274 | |
| 7 |
Creatiocreatio.com
Provides an AI-native, no-code platform for CRM and workflow automation, enhancing customer and employee experiences and boosting team efficiency. |
1,158 |
| 8 |
DataRobotdatarobot.com
Value-driven AI company accelerating AI impact with innovative AI lifecycle platform for organizations to build, operate, and govern AI landscapes confidently |
881 |
| 9 |
Dotmaticsdotmatics.com
Global leader in R&D scientific software connecting science, data, and decision-making with end-to-end solutions for research in biology, chemistry, and more Trusted by millions worldwide |
639 |
| 10 |
Salsifysalsify.com
Salsify's Product Experience Management platform helps brand manufacturers, distributors, and retailers succeed in digital commerce through PIM, Syndication, and Automation |
583 |
| 11 | 500 | |
| 12 |
Abacus Insightsabacusinsights.com
Abacus leverages healthcare data to improve patient care by breaking down silos and providing powerful insights through innovative technologies |
409 |
| 13 |
AVAeatwithava.com
An intelligent eating platform reshaping food and nutrition habits with top talent in nutrition science, technology, and behavioral coaching Currently in private beta |
359 |
| 14 | 359 | |
| 15 | 312 | |
| 16 | 266 | |
| 17 |
Tomorrow.iotomorrow.io
Weather intelligence and climate adaptation platform using space technology and AI to help organizations predict impact, mitigate risk, and ensure operational resilience |
228 |
| 18 |
Immutaimmuta.com
This company enables organizations to securely access and protect their cloud data through sensitive data discovery, security controls, and data activity monitoring |
195 |
| 19 |
AtScaleatscale.com
This company enables faster, data-driven decision-making with a semantic layer platform that simplifies and accelerates business intelligence and data science capabilities for enterprise customers |
151 |
| 20 |
Maven AGImavenagi.com
AI-powered platform transforming customer support experience through generative technology |
114 |
| 21 | 112 | |
| 22 |
Centaur.aicentaur.ai
Data labeling solution for healthcare AI with 50k+ labelers, gamified app for quality control, scalable methodology for high-quality labels in 24 hours |
79 |
| 23 |
Gutenberg Technologygutenberg-technology.com
This company helps businesses organize and share their knowledge through web and mobile apps for better collaboration and faster execution |
55 |
| 24 |
Tessianproofpoint.com
A leading cloud email security platform using machine learning to protect organizations against advanced threats and data loss, while coaching on security awareness |
41 |
| 25 |
Beaconcurebeaconcure.com
The company provides technology to validate clinical trial data, detect inconsistencies, and accelerate the regulatory approval process for pharmaceutical companies and CROs |
34 |
| 26 |
Perceptive Automataperceptiveautomata.com
A team of experts founded in 2016 to develop AI technology enabling autonomous vehicles to understand human behavior for safer driving experiences |
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 Nov 2, 2026.
More company lists in Boston
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- Technology, Information and Internet companies in Boston 33
- Business Consulting and Services companies in Boston 32
- Publicly traded companies in Boston 28
The same list elsewhere in United States
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