Y Combinator Fintech portfolio in New York

The most prolific seed accelerator in the world, batch class twice a year. Filtered to Fintech companies headquartered in New York.

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Built from a search like: “Y Combinator-backed Fintech companies in New York”

Ranked by current headcount across Y Combinator-backed Fintech companies in New York. Refreshed daily.

1
Kalshi· New York, New York, United States
The first US federally regulated exchange where you can trade on the outcome of any event.Kalshi’s historical regulatory approval from the CFTC enables it to offer a new asset class called “event contracts,” which allow traders to take positions on whether a future event will happen or not. Kalshi aims to enable investors to trade on almost anything with economic relevance from Covid numbers to whether a bill will pass in Congress, broadening the historical definition of what a commodity derivative is and paving the way for the futures market to catch up to the novel risks facing the economy today. Kalshi is backed by Sequoia, Henry Kravis, Charles Schwab, and Y Combinator.
- undisclosed
- 531 employees
- Founded 2019
2
Taktile· New York, New York, United States
Taktile empowers financial institutions to quickly unlock AI-driven efficiencies across the customer lifecycle, reducing manual work while optimizing decisions and enabling seamless end-user experiences.Built for highly regulated environments, our agentic decision platform combines the speed of AI automation with the oversight of human judgement—so you can safely approve customers, catch more fraud, and stay compliant.We power AI transformation from offices in NYC, London, Berlin, and Iasi, and have raised $80M in capital from top investors including Index Ventures, Tiger Global, Balderton Capital and Y Combinator.Join over 200 leading financial institutions who rely on Taktile to enable faster, more intelligent decisions from onboarding to credit, AML, compliance, and fraud.
- Series C
- 227 employees
- Founded 2020
3
Tremendous· New York, New York, United States
Tremendous helps businesses send gift cards and payouts to anyone, anywhere, for free. With 2,500+ reward options across 230+ countries and regions, recipients can choose exactly what they want — with no extra admin work for teams. Over 20,000 organizations trust Tremendous to manage payouts, with over 80M rewards and $2B+ sent to date.
- Seed
- 204 employees
- Founded 2010
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4
Energy Impact Partners· New York, New York, United States
Energy Impact Partners LP (EIP) is a global energy technology investor with a proprietary model designed to drive innovation. EIP brings together entrepreneurs and some of the world’s most forward-thinking energy and industrial companies to advance innovation for a better energy future. Investing in venture, growth/private equity and credit, EIP seeks attractive risk-adjusted returns for its investors by leveraging its differentiated strategy and industrial ecosystem. With over 80 corporate partners and over $4.5 billion in assets under management, EIP invests globally with over 100 professionals based in its offices in New York, San Francisco, Washington D.C., Atlanta, Palm Beach, London, Cologne and Oslo. For more information on EIP, please visit www.energyimpactpartners.com.
- Seed
- 154 employees
- Founded 2015
5
Parker· New York, New York, United States
Finally, one place to pay expenses & manage your e‐commerce finances.Parker provides you with a card to cover expenses and helps you track key metrics so that you can grow profits and maximize your brand’s potential.getparker.com
- Series B
- 104 employees
- Founded 2020

6
Hadrius· New York, New York, United States
Hadrius is the AI-native compliance platform for RIAs, broker-dealers, and private funds. We unify Marketing Review, Communications Archiving, Trade Surveillance, Code of Ethics, and Compliance Program Management into one system of record. One platform. One audit trail. Always exam-ready.Compliance teams on Hadrius don't dread exams. They compress review cycles from days to minutes, eliminate the false-positive noise that buries real risk, and walk into regulatory meetings with every piece of evidence already in place.
- Series A
- 83 employees
- Founded 2023
7
Sable· New York, New York, United States
The world's fastest, most premium path to financial freedom.
- Seed
- 74 employees
- Founded 2017
8
Long-Term Stock Exchange· New York, New York, United States
The Long-Term Stock Exchange is the exchange for companies committed to enduring success. LTSE is the only national securities exchange with SEC-approved listing principles designed to support long-term strategy, governance, and alignment between companies and long-term investors.
- Series C
- 67 employees
- Founded 2019
9
OneChronos· New York, New York, United States
The Smart Market for Institutional InvestorsOneChronos is a U.S. equities ATS designed bottom-up to fundamentally address the growing gap between how trading venues match orders and how traders need to execute.OneChronos is a Smart Market – the technical term for markets that match counterparties using mathematical optimization. Smart Markets have a proven ability to outperform traditional markets on metrics such as price improvement, liquidity, fairness, and transparency.Smart Markets enable Expressive Bidding – a tool that gives market participants the fidelity of voice trading and the advantages of an electronic venue. All market participants can benefit from the unique liquidity that Expressive Bidding generates.Operating a computationally intensive Smart Market at the speed, scale, and complexity of capital markets wasn’t possible until now. OneChronos is pioneering the artificial intelligence and technology that makes it possible.
- Series B
- 67 employees
- Founded 2015
10
Mine· New York, New York, United States
Mine is the personal finance app designed to help you get ahead.Founded on the idea that financial independence begins with ownership — of your money, your momentum, and your decisions.We make the credit-builder thousands know and love, with budgeting and spend tracking features meant to help your money be the best version of itself. We’re also the makers of MoneyGPT, the money assistant that’s got your back.Young people today are stepping into a financial world built for someone else’s life.We give young adults the confidence and control to take charge of their financial journey with simple tools, smart guidance, and a system that works for the path you choose.Let’s build your future together. Get started at usemine.com.
- Series A
- 65 employees
- Founded 2021

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Y Combinator-backed Fintech companies in New York

The list above ranks Y Combinator-backed Fintech companies headquartered in New York by current headcount, drawn from public LinkedIn and Crunchbase records. With 54 matching companies in Refolk’s index, you can see exactly where Y Combinator’s Fintech thesis has landed in New York.

Three filters - investor, industry, city - narrow the field to a tight cluster of operators with overlapping incentives. They share a thesis, a network, and a market. Hiring from this list usually means hiring someone already inside the Y Combinator Fintech world in New York.

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How this list is built

Refolk pulled Fintech companies headquartered in New York whose disclosed Crunchbase investor list includes Y Combinator, ranked them by current employee count, and kept those with at least 3 employees. The list refreshes once a day.

Last refreshed: Wed, 05 Aug 2026 20:34:00 GMT

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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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