Top US Fintech Companies 2026: 13 Leaders by the Numbers

The controller of a 40-person HVAC contractor in Phoenix closes her books on the third business day of the month. Her corporate cards come from Ramp, her customers pay invoices through a Stripe checkout, her bank feeds arrive through a Plaid connection, and half her technicians are paid into Chime accounts. She has never thought of herself as a fintech customer. That is the clearest sign of how far American fintech has travelled: in 2026 the leading firms are no longer apps people try, they are the plumbing of ordinary businesses and households, and the numbers they now report look like those of banks.

How did we choose the leading US fintech companies for 2026?

We selected US fintech companies for 2026 on measurable criteria as of October 2026: scale (revenue, payment volume or customers in the latest reported period), growth rate, licences held or pending, funding or market value, and product breadth. We grouped them by category rather than ranking them one to thirteen, because a payments processor and a consumer bank app cannot be compared on one number.

Every figure below is dated and linked. Where a private company does not publish revenue, we use the latest valuation or customer count that was reported. Rippling, the payroll and HR platform that has pushed into corporate cards and bill pay, is a credible name for this list, but we could not verify a 2026 figure, so it is mentioned here rather than profiled.

The money backdrop matters. US fintech attracted $80.8 billion across 933 deals in the first half of 2026, most of the $86.9 billion recorded for the Americas, according to KPMG's Pulse of Fintech as reported by InvestmentNews. Mergers drove the total, led by FIS buying Worldpay for $24.3 billion. Venture money is concentrating in fewer, larger winners, which is why the same dozen names keep appearing.

Which US payments and infrastructure companies lead in 2026?

By volume and valuation, Stripe is the largest private US fintech in 2026, processing $1.9 trillion in 2025 and valued at $159 billion in February 2026. Plaid leads bank-account connectivity with an $8 billion valuation set the same month, and Circle, issuer of USDC, is the largest US-listed stablecoin company, with $73.3 billion of USDC outstanding at the end of June 2026.

Stripe

Stripe's annual letter put business volume on its platform at $1.9 trillion in 2025, up 34%, and a tender offer for staff shares valued the company at $159 billion, against roughly $100 billion in late 2025, as its February 2026 annual letter and The Block reported. Stripe does not publish revenue; the letter said it remained robustly profitable and that its Revenue suite of billing tools was on track for a $1 billion annual run rate in 2026. Stablecoin payment volume across the market roughly doubled in 2025 to about $400 billion, by Stripe's estimate. Stripe has also bought its way into stablecoins: it acquired Bridge for $1.1 billion, and Bridge won conditional OCC approval for a national bank charter in February 2026.

PLPlaid

Plaid connects apps to bank accounts for payments, identity and income checks. An employee share sale in February 2026 valued it at $8 billion, up 31% from $6.1 billion in April 2025 but still well below its $13.4 billion peak in 2021, according to TechCrunch. Its chief executive has called an IPO part of the path for the coming years without naming a date.

Circle

Circle listed on the NYSE in 2025 and now reports like a rate-sensitive financial company. In the second quarter of 2026 it booked $701 million of revenue and reserve income, up 7%, with net income of $48 million and USDC circulation of $73.3 billion, up 19%, per Circle's results release. Our analysis of Circle as a public company covers why falling rates squeeze its margin.

Which US consumer fintechs are largest by revenue and customers?

By quarterly revenue in the three months to June 2026, Robinhood ($1.31 billion) and SoFi ($1.22 billion) are the largest US consumer fintechs, followed by Chime ($670 million). By users, Block's Cash App leads with 59 million monthly transacting actives in June 2026. All four were profitable in that quarter, which marks a clear break from their loss-making years.

Robinhood

Robinhood reported record second-quarter 2026 revenue of $1.31 billion, up 32%, and net income of $573 million, which included $129 million of one-off gains. It had 28.4 million funded customers, $369 billion in platform assets and 4.8 million Gold subscribers, according to its July 29, 2026 results. The subscriber line, up 39%, is the quiet engine.

SoFi

SoFi is a chartered bank with a fintech's growth rate. Its second-quarter 2026 GAAP net revenue reached $1.22 billion, up 43%, with net income of $156.6 million, 15.8 million members (up 35%) and $45.5 billion of deposits, per its earnings release. The bank charter lets it fund loans with cheap deposits rather than wholesale money.

Chime

Chime listed on Nasdaq in June 2025 at $27 a share, valuing it at $18.4 billion at debut, according to American Banker. In the second quarter of 2026 revenue rose 27% to $670 million, active members reached 10.4 million and the company posted a second straight quarterly profit of $28 million, as Reuters reported. It lifted full-year growth guidance to 25-26%.

BLBlock (Cash App and Square)

Block's second-quarter 2026 gross profit was $3.17 billion, up 25%. Cash App contributed $1.97 billion, up 31%, from 59 million monthly transacting actives, while Square processed $72.8 billion of gross payment volume, up 13%, according to its shareholder letter filed with the SEC. It raised full-year gross profit guidance to $12.51 billion.

Which buy now, pay later firms lead the US market in 2026?

Affirm is the largest US-headquartered buy now, pay later lender by volume in 2026, with $50.2 billion of gross merchandise volume in the fiscal year to June 2026. Klarna, Swedish-founded but listed on the NYSE since September 2025, is larger globally at $36.6 billion of GMV in one quarter, and its US volume is growing faster than the rest of its business.

Affirm

Affirm's fiscal fourth quarter of 2026 delivered GMV of $14.1 billion, up 36%, revenue of about $1.17 billion and 27.8 million active consumers, according to Crowdfund Insider's summary of the August 27 results. Management guided to more than $64 billion of GMV in fiscal 2027.

Klarna

Klarna priced its US IPO at $40 on September 10, 2025, at a $15 billion valuation. In the second quarter of 2026 it reported revenue of $1,042 million, up 27%, GMV of $36.6 billion, US GMV of $7.9 billion (up 27%), 120 million active consumers and a $9 million profit, per its filing with the SEC.

Which business finance fintechs are growing fastest?

Ramp is the fastest-growing US business finance fintech by valuation in 2026, reportedly valued at about $60 billion in October 2026, with Bloomberg putting annualized revenue above $1.5 billion by June. Brex left the independent field when Capital One completed its $5.15 billion purchase in April 2026, and Mercury, the startup bank, is moving toward its own national charter.

RARamp

Bloomberg reported on October 9, 2026 that Ramp was raising about $1.85 billion at a roughly $60 billion pre-money valuation, co-led by Thrive Capital and Dragoneer, as FinTech Futures summarised; Ramp had not confirmed it. In June the company closed a $750 million Series F at $44 billion, saying annualized revenue had passed $1 billion and it served more than 70,000 businesses. Bloomberg has since reported the run rate passed $1.5 billion by June. For context on the product category, see our explainer on corporate expense management cards.

Brex

Brex agreed in January 2026 to sell to Capital One for $5.15 billion in cash and stock, and the deal closed on April 7, 2026, according to Capital One. It is now a bank-owned platform, which tells you how incumbents prefer to buy rather than build in this segment.

Mercury

Mercury raised a $200 million Series D at a $5.2 billion valuation on May 20, 2026, and says it serves more than 300,000 businesses. It applied for an OCC national bank charter in December 2025 and received conditional approval in late April 2026, according to PYMNTS.

How do the leading US fintech companies compare?

Compared on their latest dated metric as of October 2026, the US leaders split into three types: public companies reporting quarterly revenue (Robinhood, SoFi, Block, Affirm, Klarna, Chime, Circle), private companies valued through tender offers or rounds (Stripe, Ramp, Plaid, Mercury), and one acquired platform (Brex). The table below lines them up.

Company	HQ	What it does	Latest dated metric
Stripe	San Francisco / Dublin	Online payments, billing, stablecoins	$159B valuation (Feb 2026); $1.9T volume in 2025
RARamp	New York	Corporate cards, spend software	$60B valuation (Oct 2026, reported)
Robinhood	Menlo Park	Brokerage, crypto, subscriptions	$1.31B revenue, Q2 2026
SoFi	San Francisco	Chartered digital bank, loans	$1.22B revenue, 15.8M members, Q2 2026
BLBlock	Oakland	Cash App, Square merchant payments	$3.17B gross profit, Q2 2026
Affirm	San Francisco	Buy now, pay later lending	$50.2B GMV, FY to Jun 2026
Klarna	Stockholm (NYSE-listed)	Buy now, pay later, shopping app	$1,042M revenue, Q2 2026
Chime	San Francisco	Mobile banking for everyday earners	$670M revenue, 10.4M members, Q2 2026
Circle	New York	USDC stablecoin issuer	$73.3B USDC, end Jun 2026
PLPlaid	San Francisco	Bank-account data and payments APIs	$8B valuation (Feb 2026)
Mercury	San Francisco	Business banking for startups	$5.2B valuation (May 2026)
Brex	San Francisco	Corporate cards, now Capital One	$5.15B acquisition (closed Apr 2026)

Metrics use different bases (revenue, gross profit, GMV, valuation) and are not directly comparable across rows.

What are investors paying for US fintech revenue? A worked example

In 2026 investors are paying about 40 times annualized revenue for Ramp, and about 8 cents of valuation for every dollar Stripe processed in 2025, far richer terms than listed peers get. Stripe does not disclose revenue, so volume is the only clean yardstick. Those prices assume years of growth, not current earnings.

Here is the arithmetic. Stripe: $159 billion divided by $1.9 trillion of 2025 volume is about 8.4 cents of valuation per dollar processed in a year. Ramp: $60 billion divided by the $1.5 billion run rate Bloomberg reported gives 40 times; on the $1 billion Ramp itself cited in June, it would be 60 times. Either way, the figure excludes the new $1.85 billion of cash.

Take rates explain why a dollar of volume is worth such different amounts. Affirm's fourth-quarter revenue of $1.17 billion on $14.1 billion of GMV works out to about 8.3%, because it earns interest on the loans it holds. Klarna's $1,042 million on $36.6 billion is about 2.8%, because most of its volume is short, interest-free pay-in-four. Applied to guidance, Affirm's outlook of $64 billion of fiscal 2027 GMV at an 8.5% take rate implies roughly $5.4 billion of revenue.

A dollar of payment volume is worth eight cents to one lender and under three to another. Valuation follows the cents, not the dollars.

None of this is a view on whether these prices are right. It shows what has to be true: Ramp has to keep compounding at startup speed for years to grow into a 40 times multiple, while the listed companies are already being judged on profit.

What should you watch in US fintech next?

The next six months will test whether US fintech's 2026 profitability holds as interest rates fall and stablecoin rules take effect. Key dated events are SoFi's third-quarter results on October 27, 2026, Block's on November 3, 2026, and rulemaking under the GENIUS Act that will decide how Bridge, Circle and bank issuers compete.

• October 27, 2026: SoFi reports third-quarter results, a read on whether deposit growth keeps funding its lending.
• November 3, 2026: Block reports, with guidance of $3.13 billion in third-quarter gross profit.
• Charters: Bridge and Mercury both hold conditional OCC approvals. Final approval would put fintech-owned national banks in direct competition with regional banks. Our guide to GENIUS Act implementation tracks the stablecoin side.
• IPO queue: Stripe, Ramp and Plaid all have the scale to list, and Plaid has said an IPO is on its path. Any filing would reset private valuations across the sector.
• Instant rails: As FedNow and RTP spread, account-to-account payments will pressure card-based business models over time.

For how these names stack up against other markets, see our companion lists on leading UK fintech companies and Canadian fintech companies.

This list is editorial research, not investment advice or an endorsement. Company figures are as reported by the linked sources and may be restated.

About this researchMuffinPay InsightsIndependent analysis of stablecoins, CBDCs, cross-border payments and digital public infrastructure. Every figure is linked to its source. Read our editorial standards →