Y Combinator Fintech portfolio in San Francisco
The most prolific seed accelerator in the world, batch class twice a year. Filtered to Fintech companies headquartered in San Francisco.
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Built from a search like: “Y Combinator-backed Fintech companies in San Francisco”
Ranked by current headcount across Y Combinator-backed Fintech companies in San Francisco. Refreshed daily.
- 1Brex· San Francisco, California, United States
Brex is the intelligent finance platform built for speed and control, empowering founders and finance teams to spend smarter and move faster globally with intuitive corporate cards, banking, expenses, and travel. Over 35,000 companies run on Brex, including DoorDash, ServiceTitan, Wiz, and Five Guys. Brex LLC is a wholly owned subsidiary of Capital One, N.A.
- Debt
- 2k employees
- Founded 2017
- 2Human Interest· San Francisco, California, United States
Human Interest is founded on a simple idea: Affordable, zero-transaction fee 401(k) plans for small and medium businesses. Businesses that, historically, never had access to these types of investment and tax-benefit retirement vehicles. Here are the big things we've done to shake up the retirement industry: 1. We eliminated all 401(k) transaction fees for companies and their employees.2. We made it so easy to start saving that we see 2x the average industry participation rate.3. We helped thousands of customers open their company’s first 401(k) plan and start saving.4. We built end-to-end technology to solve administrative and compliance headaches for small and medium-sized businesses.Human Interest is leveling the playing field on retirement by making employer and employee retirement savings more intuitive, more affordable, and more inclusive.Human Interest is an affordable, full-service 401(k) and 403(b) provider that seeks to make it easy for small and medium-sized businesses to assist their employees with investing for retirement. Investment Advisory services provided through Human Interest Advisors, a Registered Investment Adviser. For more information, please visit humaninterest.com.This content has been prepared for informational purposes only, and should not be construed as tax, legal, or individualized investment advice. Consult an appropriate professional regarding your situation. Human Interest does not provide tax or legal advice. Investing involves risk, including risk of loss. Past performance does not guarantee future results.
- Series unknown
- 886 employees
- Founded 2015
- 3Flutterwave· San Francisco, California, United States
At Flutterwave, we are on a mission to build payments infrastructure to connect Africa to the global economy. We do this by building technology, tools, and infrastructure for businesses and banks who want to provide a more seamless and secure payments experience for their customers. Founded in 2016 by a team of African finance and technology veterans from Standard Bank, PayPal, Google Wallet amongst others.Flutterwave has grown to become one of the fastest growing payments companies in the world. Since inception Flutterwave has processed close to $2 billion in payments and 25 million transactions across over 33 African countries where it currently operates. It has attracted significant investment from experienced Fintech investors such as Ycombinator Continuity Fund (investors in Stripe), Greycroft (investors in Braintree and Venmo), Greenvisor Capital, Omidyar Network, and Glynn Capital amongst others. In 2017 Flutterwave was named Africa’s best fintech company at the Apps Africa Innovation Awards.
- Series unknown
- 883 employees
- Founded 2016
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- 4Newfront· San Francisco, California, United States
Newfront helps organizations navigate complexity, strengthen the employee experience, and move forward with confidence by pairing deep industry expertise with technology built for scale. Now part of WTW, a leading global advisory, broking, and solutions company in the areas of people, risk, and capital, Newfront combines its technology and specialization with WTW’s global reach to broaden the resources and capabilities available to clients while preserving the team and service they rely on.
- Series D
- 574 employees
- Founded 2017
- 5Every· San Francisco, California, United States
Every is the operating system for your back office, combining incorporation, banking, payroll, accounting, HR, taxes, and compliance—all in one place.Whether you're launching your first company or scaling after raising funds, Every provides you with the tools and expert support to manage financial operations, remain compliant, and run your business with ease.No more juggling multiple vendors—Every streamlines everything, allowing you to focus on building and growing.Would you like to see how it works for your business? Request a personalized tour and discover how Every can support you at every stage. https://www.every.io/why-every
- Series A
- 449 employees
- Founded 2021
Y Combinator-backed Fintech companies in San Francisco
The list above ranks Y Combinator-backed Fintech companies headquartered in San Francisco by current headcount, drawn from public LinkedIn and Crunchbase records. With 83 matching companies in Refolk’s index, you can see exactly where Y Combinator’s Fintech thesis has landed in San Francisco.
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 San Francisco.
Refolk converts this list into a live search. Ask for “Y Combinator Fintech companies in San Francisco hiring senior engineers” or “founders of Y Combinator-backed Fintech companies in San Francisco who left in the last year” and Refolk returns a ranked shortlist.
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Last refreshed: Wed, 05 Aug 2026 11:09:14 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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