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 monthly.

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
- 580 employees
- Founded 2019
2
Taktile· New York, New York, United States
Taktile enables financial institutions to transform into AI-native organizations that are increasingly powered by autonomous agents. With our Agentic Decision Platform, customers combine AI agents, rules, relevant context, and human oversight to safely automate and optimize their decisions—approving more customers, reimbursing claims instantly, and financing every business worth funding. Founded in 2020, Taktile powers millions of decisions daily for institutions including Mercury, Monzo, Faire, and Pleo. With offices in New York, London, Berlin, São Paulo, and Iași, the company has raised $184M from Goldman Sachs Growth Equity, Index Ventures, Tiger Global, Balderton Capital, and Y Combinator. As AI powers automated decisions, Taktile is how teams ensure every one is the best for business. Learn more at https://taktile.com.
- Series C
- 232 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
- 216 employees
- Founded 2010
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4
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
- 100 employees
- Founded 2020
5
Hadrius· New York, New York, United States
Hadrius is the agentic compliance infrastructure for SEC- and FINRA-regulated firms. We help compliance teams scale without adding operational complexity by executing routine compliance work under human governance. Built on one system of records, Hadrius replaces fragmented compliance systems and the operational burden required to manage them, allowing teams to spend less time administering compliance and more time exercising judgment.
- Series A
- 86 employees
- Founded 2023

6
OneChronos· New York, New York, United States
OneChronos is building the bazaar for agentic systems. We’re starting in capital markets, where our matching markets routinely account for more than 1% of notional U.S. equity market volume. By bringing together auction theory, distributed systems, artificial intelligence, and deep market structure expertise, we help humans and agentic systems transact more efficiently, improve how value is allocated, and, ultimately, increase global GDP.
- Series B
- 77 employees
- Founded 2015
7
Titan· New York, New York, United States
Titan helps you navigate equity decisions, liquidity events, and career transitions - with a dedicated human advisor and a modern platform. Get trusted advice when timing matters.Titan Global Capital Management USA LLC is an SEC-registered investment adviser. Content shared on this page is for informational purposes only and does not constitute investment, legal, or tax advice. Visit www.titan.com/legal.
- Series unknown
- 75 employees
- Founded 2017
8
Sable (YC S19 | Acquired)· New York, New York, United States
The world's fastest, most premium path to financial freedom.
- Seed
- 74 employees
- Founded 2017
9
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
- 65 employees
- Founded 2019
10
Mine (Acquired)· New York, New York, United States
Acquired 2026Mine 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
- 64 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 50 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 monthly.

Last refreshed: Mon, 14 Sep 2026 20:13:52 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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