Top Series A companies in Toronto
Companies that have closed a Series A - product-market fit confirmed and scaling. Filtered to companies headquartered in Toronto.
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- StageSeries A
- HQToronto
- Matches134
Built from a search like: “Top Series A companies in Toronto”
Ranked by current headcount across Series A companies headquartered in Toronto. Refreshed monthly.
- 1Othership· Toronto, Ontario, Canada
Othership is building the future of emotional wellness through social bathhouse experiences and an immersive breathwork app.
- Series A
- 264 employees
- Founded 2020
- 2BioRender· Downtown Toronto (CN Tower / King and Spadina / Railway Lands / Harbourfront West / Bathurst Quay / South Niagara / YTZ), Ontario, Canada
BioRender is revolutionizing how science is communicated, one graphic at a time (you can think of us as the Adobe or Canva for science!). We're on a mission to accelerate science by empowering all scientists to quickly and easily communicate their research.We are a team of passionate scientists, engineers, science illustrators, designers and entrepreneurs backed by an incredible group of investors, including YCombinator. We nerd out on cool science stuff and solving big problems. We work really hard and sweat the details to deliver a high impact product that our users love.
- Series A
- 261 employees
- Founded 2017
- 3Rail· Toronto, Ontario, Canada
At Rail, we build the payment infrastructure that enables fast, secure, and borderless money movement across the globe. By combining traditional banking systems with the cutting-edge digital currency technology of stablecoins, we empower fintechs and enterprises to connect seamlessly, scale efficiently, and innovate confidently. Our platform ensures compliance, reliability, and speed—whether it's traditional fiat currency or stablecoins.Looking for borderless payment infrastructure to power your money movement? Get in touch today.
- Series A
- 212 employees
- Founded 2021
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- 4ResQ· Downtown Toronto (St. James Park), Ontario, Canada
ResQ is the only facilities management platform designed to streamline repair and maintenance operations for restaurants. It allows operators to efficiently track their assets, choose from a network of high-quality vendors, enhance team productivity through work order management, and gain better visibility into financials.ResQ is trusted by over 5,000 leading restaurant groups including Nobu, McDonalds, Five Guys, Pret a Manger, Jersey Mike's, Hai Hospitality, The Keg, Fogo de Chão, Tarka Indian Kitchen, Parker Hospitality, Hattie B's, and so many more! We were founded with the belief that restaurant operators and service providers should have a much better way to operate their businesses — and our product reflects this. We are built by restaurant operators, for restaurant operators! We are trusted by world's leading restaurant brands and are venture backed by top tier VCs.
- Series A
- 178 employees
- Founded 2018
- 5Adeptmind· Toronto, Ontario, Canada
E-commerce is evolving, but retailers still face critical gaps - unconverted searches, rising ad costs, and fragmented discovery experiences. Adeptmind is here to fix that.With deep intent mining expertise, we use Gen AI to tackle retail’s biggest challenges, one by one - expanding organic search visibility, improving search performance, recovering lost ROAS, and seamlessly connecting physical products with digital shoppers.Our roots in AI innovation run deep. Our founders pioneered AI voice assistant models for Samsung, LG, Tesla, and Blackberry as part of Maluuba, a company that helped shape modern natural language understanding. Now, we’re applying that same expertise to transform search, discovery, and merchandising for retailers, ensuring every shopper finds what they’re looking for - when and where they need it.
- Series A
- 159 employees
- Founded 2016
Find engineers at Series A companies in Toronto
Series A companies in Toronto are some of the fastest-moving employers in the market. The list above ranks the largest Series A-stage companies headquartered in Toronto by current headcount, drawn from public LinkedIn and Crunchbase records. With 134 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 Toronto 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 Toronto” or “senior engineers at Series A companies in Toronto hiring” and Refolk returns a ranked shortlist with evidence behind each match.
How this list is built
Last refreshed: Tue, 20 Oct 2026 11:37:48 GMT
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Related lists
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- Series A in San Francisco
- Series A in New York
- Series A in London
- Series A in Berlin
- Series A in Paris
- Series A in Tel Aviv
- Series A in Boston
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Common questions
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.
How fresh is the data?
The underlying index updates continuously and this ranking is rebuilt monthly. Last refreshed: Tue, 20 Oct 2026 11:37:48 GMT. For a list built against the index as it stands today, sign up and run the search live.
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- Staff backend engineers in NYC who shipped Rust in production
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