Top Series A companies in Boston

Companies that have closed a Series A - product-market fit confirmed and scaling. Filtered to companies headquartered in Boston.

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Ranked by current headcount across Series A companies headquartered in Boston. Refreshed monthly.

1
Temu· Boston, Massachusetts, United States
Temu is an e-commerce company that connects consumers with millions of merchandise partners, manufacturers and brands with the mission to empower them to live a better life. Temu is committed to bringing affordable products onto its platform to enable consumers and merchandise partners to fulfill their dreams in an inclusive environment. Temu was founded in Boston, Massachusetts in 2022.
- Series A
- 8.2k employees
- Founded 2022
2
University of Massachusetts· Boston, Massachusetts, United States
The University of Massachusetts is a five-campus public research university system renowned for the quality of its academic programs, the scope and excellence of its research, and the strength of its public service mission. UMass provides access to high-quality, affordable education that advances knowledge and improves the lives of the people of the Commonwealth, the nation and the world.
- Series A
- 3.5k employees
- Founded 2020
3
Continuum· Boston, Massachusetts, United States
EPAM Continuum is a global innovation design consultancy. Our work is informed by the needs, desires, and aspirations of people: customers, patients, citizens, and those who make our client organizations work.EPAM Continuum started with the revolutionary notion that innovation could arise from a concern for human beings. We believed it wasn’t only the domain of science and technology, but could be found by crossing boundaries. Disciplinary boundaries. We sought to "do well by doing good."Our future is still about "doing well by doing good," but as the world grows continually more complex, our capabilities keep evolving. As we mature, the people and industries we serve, and the problems we address, expand. We embrace the next "What if..." and relish the challenges it engenders.We bring to every project a global perspective, with world-class capabilities and local sensibilities. EPAM Continuum operates with a collective purpose of making a difference—in people’s lives and in our clients’ bottom line.We innovate with, not at, our clients. We take your business today to where you want to be in the future. Join us.
- Series A
- 530 employees
- Founded 1983
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4
RYZE· Boston, Massachusetts, United States
RYZE is redefining the way people start their days.We believe coffee should do more than just wake you up—it should nourish your body and mind. Our thoughtfully-crafted brew combines smooth, organic coffee with a propietary blend of six, USA-grown, organic mushrooms to provide energy, focus, and balance—without the jitters or crash.Beloved by millions of people across the country, RYZE is ready to help you feel awesome every single day. Your new ritual awaits. Come RYZE with us! 🍄
- Series A
- 443 employees
- Founded 2020
5
Ataccama· Boston, Massachusetts, United States
AI has raised the stakes for enterprise data. Organizations need data they can trust to power decisions, meet regulatory requirements, and build reliable AI.Ataccama helps enterprises create trusted, AI-ready data.The Ataccama ONE platform provides a unified data trust layer for the modern AI stack. It brings together data quality, observability, governance, lineage, and reference and master data management so organizations can understand their data, manage risk, and maintain confidence in the information that drives their business.Unlike fragmented data management tools that only detect problems, Ataccama uses an agentic approach to help teams act on them. The ONE AI Agent works as a digital data steward that helps identify issues, generate quality rules, and resolve problems across the data estate.Leading enterprises rely on Ataccama to reduce risk, support regulatory compliance, and deliver trusted data for analytics, operations, and AI.
- Series A
- 436 employees
- Founded 2007

6
ThirdChannel· Boston, Massachusetts, United States
Brands that partner with ThirdChannel see consistent execution across every retail location, store associates who genuinely know and sell their products, and displays that are properly set, maintained, and always on brand.We are a fully managed retail field service. We scope, staff, train, deploy, and report on your brand's retail presence so you never have to. From rep recruitment and onboarding to visual merchandising, display compliance, associate training, field execution, competitive intelligence, and executive reporting, we own every layer of your retail operation across specialty, wholesale, and direct-owned retail.We don't hand you software and wish you luck. We own the outcome, bringing together passionate brand experts, cutting-edge technology, and real-time intelligence to ensure your brand looks its best, sells confidently, and wins at retail.
- Series A
- 293 employees
- Founded 2012
7
Burns & Levinson LLP· Boston, Massachusetts, United States
Burns & Levinson is a full-service, Boston-based law firm, with more than 125 attorneys in Massachusetts and Rhode Island. Since 1960, the firm's steady, strategic growth has positioned it as a premier legal resource for regional, national, and international clientele. Core practice areas are Business Law, Business Litigation, Intellectual Property, Private Client Legal Services, and Real Estate.
- Series A
- 255 employees
- Founded 1960
8
Spines· Boynton Beach, Florida, United States
📚 Spines: Revolutionizing Publishing with AIAt Spines, we're redefining the publishing journey,Our mission? Making publishing simple, fast, and accessible, Empowering authors to bring their stories to life!Why Choose Spines?■ Speed: Transform your manuscript into a published book in under 30 days.■ accessibility: Our Comprehensive plans are designed to be significantly lower than industry standards, thanks to our AI-driven tools.■ Dedicated Support: A personal production manager will be your guide for every step of the way.■ All formats available: Whether it’s POD (Print-on-Demand), eBooks, or Audiobooks, we provide all the formats you need to reach your audience.■ Distribution: Your words will touch hearts across countless global channels, including top retailers like Amazon and Barnes & Noble.■ Trust: Our 7-day money-back guarantee reflects our commitment to your satisfaction and trust.■ User-Friendly Dashboard: Navigate publishing seamlessly, regardless of tech experience. Including Proofreading & editing, formatting, cover design, and much more!■ Open for All Authors: Regardless of whether you’re taking your first steps in writing or are an established author, Spines is tailored for your success in publishing.📈 Join the Revolution:With Spines, your story reaches beyond borders, making an impact globally. We're not just a publishing house; we're a community of storytellers and dreamers, turning aspirations into legacies. Ready for a transformative journey? Say hi to Spines – where your publishing dreams become reality.🖊️ Your Story, Our Mission:Spines is here for every aspiring author. With our innovative approach and comprehensive support, we're paving the way for the future of publishing. Join us, and let's make your story heard!
- Series A
- 222 employees
- Founded 2021
9
Agency· Boston, Massachusetts, United States
Agency runs the long tail for B2B SaaS. Most $100m+ ARR companies cover the top of their book with CSMs and let the rest manage itself, with often ~30% of revenue going untouched. We handle those accounts for you: monitoring usage, catching churn signals early, and running personalized outreach across onboarding, adoption, expansion, and renewal.
- Series A
- 220 employees
- Founded 2023
10
Lynx· Boston, Massachusetts, United States
Lynx is an API-connected healthcare payments, banking, and e-commerce platform that enables companies to embed customizable health-fintech solutions into their customer experience to improve affordability, drive health engagement, and enhance financial security.
- Series A
- 217 employees
- Founded 2021

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Find engineers at Series A companies in Boston

Series A companies in Boston are some of the fastest-moving employers in the market. The list above ranks the largest Series A-stage companies headquartered in Boston by current headcount, drawn from public LinkedIn and Crunchbase records. With 195 matching companies in Refolk’s index, the density of senior engineers, designers, and founders is unusually high.

At Series A, teams tend to be small, ambitious, and on the hunt for senior talent. The companies on this list are good signals for where the Boston talent market is heating up - and for which engineers and founders are about to become tomorrow’s operators.

Refolk converts this list into a live search. Ask for “founders of Series A companies in Boston” or “senior engineers at Series A companies in Boston hiring” and Refolk returns a ranked shortlist with evidence behind each match.

How this list is built

Refolk pulled Series A companies headquartered in Boston from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 5 employees. The list refreshes monthly.

Last refreshed: Fri, 18 Sep 2026 07:49:56 GMT

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How is this ranking built?

The list draws on the public company graph - headcount and growth signals, funding history, and recency. The criteria chips at the top show exactly which filters produced it, and the methodology section explains the ranking.

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