Company lists · Data refreshed September 2026

Top 25 Fintech payment processors based in the United States

Name: Fintech payment processors based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 2, 2026 2,706 companies tracked

RevenueBase identified 2,706 fintech payment processors headquartered in the United States as of September 2026 and tracks 311,038 professional contacts across them, including 100,656 with verified work emails and 81,386 with mobile numbers. New York is the largest hub.

This list covers fintech payment processors headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 2, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list Match evidence on every row Refreshed Sep 2, 2026 86% judged on-target in blind review

2,706Companies

311,038Contacts tracked

100,656Verified emails

81,386Mobile numbers

Unlock all 2,706 companies Free signup · no credit card · 500 free credits

The 25 largest fintech payment processors based in the United States

Ranked by team size

Top 25 of 2,706 fintech payment processors based in the United States, ranked by team size, largest first. Data refreshed Sep 2, 2026. Evidence rates how directly each company's own description names fintech payment processors: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	American ExpressIndirect evidence	New York, NY, United States	10001+	80,619
	“At American Express, we know that with the right backing, people and businesses have the power to progress in incredible ways.” Source: company website · checked Sep 2, 2026
2	MastercardIndirect evidence	Miami, FL, United States	10001+	40,144
	“Mastercard powers economies and empowers people in 200+ countries and territories worldwide.” Source: company website · checked Sep 2, 2026
3	VISAPartial evidence	Austin, TX, United States	10001+	38,834
	“Visa (NYSE: V) is a world leader in digital payments, facilitating transactions between consumers, merchants, financial institutions and government entities across more than 200…” Source: company website · checked Sep 2, 2026
4	Global Payments INCPartial evidence	Atlanta, GA, United States	10001+	11,075
	“Global Payments (NYSE: GPN) is a leading payment technology and software company that powers commerce for businesses of all sizes worldwide.” Source: company website · checked Sep 2, 2026
5	First Data CorporationIndirect evidence	United States	10001+	6,637
	“First Data is now Fiserv (NASDAQ:FISV).” Source: company website · checked Sep 2, 2026
6	SquareIndirect evidence	Seattle, WA, United States	1,001-5,000	6,126
	“Since we opened our doors in 2009, the world of commerce has evolved immensely, and so has Square.” Source: company website · checked Sep 2, 2026
7	VerifonePartial evidence	Alpharetta, GA, United States	1,001-5,000	4,347
	“The world’s leading brands trust Verifone for global payments.” Source: company website · checked Sep 2, 2026
8	SUMUPPartial evidence	Boulder, United States	1,001-5,000	3,809
	“SumUp is a leading global fintech company committed to levelling the playing field for small businesses.” Source: company website · checked Sep 2, 2026
9	HeartlandPartial evidence	Portland, OR, United States	1,001-5,000	3,804
	“Global Payments Inc.(NYSE: GPN), a leading worldwide provider of payment technology and software solutions, announced the unification of its technology stack under a single brand…” Source: company website · checked Sep 2, 2026
10	CorpayPartial evidence	Los Angeles, CA, United States	10001+	3,555
	“Corpay (NYSE: CPAY) is a global leader in business payments, helping companies simplify and control vendor payments, international payments, and employee payments through modern…” Source: company website · checked Sep 2, 2026
11	ElavonIndirect evidence	Atlanta, GA, United States	1,001-5,000	2,888
	“Elavon, a wholly owned subsidiary of U.S.” Source: company website · checked Sep 2, 2026
12	Incomm PaymentsPartial evidence	Atlanta, GA, United States	1,001-5,000	2,421
	“InComm Payments is an innovative global payments technology provider.” Source: company website · checked Sep 2, 2026
13	checkout.comPartial evidence	San Francisco, CA, United States	1,001-5,000	2,289
	“Checkout.com processes payments for thousands of companies that shape the digital economy.” Source: company website · checked Sep 2, 2026
14	Shift4Indirect evidence	Tampa, FL, United States	1,001-5,000	2,161
	“Shift4 (NYSE: FOUR) powers the experience economy, enabling businesses to deliver the moments that matter.” Source: company website · checked Sep 2, 2026
15	JuspayPartial evidence	San Mateo, CA, United States	1,001-5,000	1,773
	“JUSPAY is a global leader in enterprise payment solutions, powering payments for merchants and banks worldwide.” Source: company website · checked Sep 2, 2026
16	Early WarningPartial evidence	Washington, DC, United States	1,001-5,000	1,551
	“Early Warning Services, LLC, helps power payments innovation across the United States banking sector –enabling financial access, advancing reliable and fast payments for America’s…” Source: company website · checked Sep 2, 2026
17	Green DOT CorporationPartial evidence	Provo, UT, United States	1,001-5,000	1,208
	“About Green Dot Green Dot Corporation (NYSE: GDOT) is a financial technology platform and registered bank holding company that builds banking and payment solutions to create…” Source: company website · checked Sep 2, 2026
18	TOPAZIndirect evidence	Great Falls, VA, United States	1,001-5,000	1,077
	“At the forefront of the financial revolution, Topaz is a technological powerhouse specializing in digital financial solutions, standing out as the undisputed leader in the…” Source: company website · checked Sep 2, 2026
19	PayrocPartial evidence	Lakewood Ranch, FL, United States	1,001-5,000	948
	“Payroc is a high-growth, multi-national payments platform, merchant acquirer, and processing powerhouse processing over $93 billion in annual volume for more than merchants.” Source: company website · checked Sep 2, 2026
20	Cross RiverIndirect evidence	Fort Lee, NJ, United States	501-1,000	935
	“Cross River Bank provides technology infrastructure powering the future of financial services.” Source: company website · checked Sep 2, 2026
21	Discover Financial ServicesIndirect evidence	Riverwoods, IL, United States	10001+	746
	“We are Discover.” Source: company website · checked Sep 2, 2026
22	SesamiIndirect evidence	Dallas, TX, United States	501-1,000	744
	“Sesami helps financial institutions and consumer businesses optimize their cash ecosystem’s performance through a single end-to-end partnership and unique business intelligence…” Source: company website · checked Sep 2, 2026
23	CPI Card GroupPartial evidence	Nashville, TN, United States	1,001-5,000	739
	“CPI Card Group (NYSE:PMTS) is a payments technology company that is integral to the payments ecosystem.” Source: company website · checked Sep 2, 2026
24	FullsteamIndirect evidence	Atlanta, GA, United States	1,001-5,000	624
	“Backed by Aquiline Capital Partners and ADIA, Fullsteam is a dynamic and growing team of over 2,100 employees committed to driving innovation and delivering best-in-class software…” Source: company website · checked Sep 2, 2026
25	VantivIndirect evidence	Symmes Township Cincinnati, OH, United States	1,001-5,000	562
	“We are now FIS.” Source: company website · checked Sep 2, 2026

Showing 25 of 2,706 fintech payment processors based in the United States

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Fintech payment processors based in the United States at a glance

As of Sep 2, 2026

11-50Median size (employees)

New YorkLargest hub · 143 HQs

81,386Contacts with mobile numbers

Sep 2, 2026Data refreshed

Companies by employee count

1-10

1,094

11-50

986

51-200

426

201-500

100

501-1,000

1,001-5,000

10001+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among fintech payment processors, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “fintech payment processors”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among fintech payment processors, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 100,656 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 2, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Fintech payment processors by metro

Fintech payment processors in New York143
Fintech payment processors in Miami64
Fintech payment processors in San Francisco57
Fintech payment processors in Los Angeles56
Fintech payment processors in Las Vegas53
Fintech payment processors in Atlanta52
Fintech payment processors in Dallas43

Frequently asked

How many fintech payment processors are there based in the United States?

RevenueBase identified 2,706 fintech payment processors headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

American Express, headquartered in New York, tops this list with the largest team on record.

Which city has the most fintech payment processors?

New York leads with 143 headquartered companies, followed by Miami (64) and San Francisco (57).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 100,656 verified decision-maker contacts tracked across these 2,706 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 2, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.