Company lists · Data refreshed September 2026

Top 25 Fintech software development firms based in the United States

Name: Fintech software development firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 1,204 companies tracked

RevenueBase identified 1,204 fintech software development firms headquartered in the United States as of September 2026 and tracks 202,609 professional contacts across them, including 83,991 with verified work emails. New York is the largest hub.

This list covers fintech software development firms 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

1,204Companies

202,609Contacts tracked

83,991Verified emails

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The 25 largest fintech software development firms based in the United States

Ranked by team size

Top 25 of 1,204 fintech software development firms based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to fintech software development firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	FIS	Indirect evidence	Jacksonville, FL, United StatesHQ checked Sep 28, 2026	10001+	38,885 contacts →
	Indirect evidence “Unlocking financial technology.” Source: RevenueBase Database · checked Sep 28, 2026
2	Fiserv	Indirect evidence	Milwaukee, WI, United StatesHQ checked Sep 28, 2026	10001+	34,513 contacts →
	Indirect evidence “Fiserv, Inc.(NASDAQ: FISV) is a global technology leader committed to delivering innovative and transformative financial services experiences for clients in more than 100…” Source: RevenueBase Database · checked Sep 28, 2026
3	Stripe	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 28, 2026	5,001-10,000	13,124 contacts →
	Indirect evidence “Stripe builds programmable financial services.” Source: RevenueBase Database · checked Sep 28, 2026
4	Global Payments INC	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 28, 2026	10001+	11,147 contacts →
	Partial evidence “Global Payments (NYSE: GPN) is a leading payment technology and software company that powers commerce for businesses of all sizes worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
5	Jack Henry	Indirect evidence	Monett, MO, United StatesHQ checked Sep 28, 2026	5,001-10,000	6,759 contacts →
	Indirect evidence “Jack Henry (Nasdaq: JKHY) is a well-rounded financial technology company that strengthens the connections between people and their financial institutions through technology and…” Source: RevenueBase Database · checked Sep 28, 2026
6	Square	Indirect evidence	San Francisco, AZ, United StatesHQ checked Sep 28, 2026	1,001-5,000	6,194 contacts →
	Indirect evidence “Since we opened our doors in 2009, the world of commerce has evolved immensely, and so has Square.” Source: RevenueBase Database · checked Sep 28, 2026
7	ACI Worldwide	Partial evidence	Elkhorn, NE, United StatesHQ checked Sep 28, 2026	1,001-5,000	4,588 contacts →
	Partial evidence “ACI Worldwide, an original innovator in global payments technology, delivers transformative software solutions that power intelligent payments orchestration in real time so banks…” Source: RevenueBase Database · checked Sep 28, 2026
8	Heartland	Partial evidence	Oklahoma City, OK, United StatesHQ checked Sep 28, 2026	1,001-5,000	3,787 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
9	Deluxe	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 28, 2026	5,001-10,000	3,695 contacts →
	Indirect evidence “Deluxe, a trusted payments and data company, champions business so communities thrive.” Source: RevenueBase Database · checked Sep 28, 2026
10	Payoneer	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	3,070 contacts →
	Indirect evidence “Payoneer is the financial technology company empowering the world’s small and medium-sized businesses to transact, do business, and grow globally.” Source: RevenueBase Database · checked Sep 28, 2026
11	Q2	Partial evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,834 contacts →
	Partial evidence “Q2 is a financial experience company dedicated to providing digital banking and lending solutions to banks, credit unions, alternative finance, and fintech companies in the U.S.” Source: RevenueBase Database · checked Sep 28, 2026
12	Arcesium	Indirect evidence	New York City, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,637 contacts →
	Indirect evidence “Arcesium is a global financial technology company delivering front-to-back technology solutions for some of the world’s most sophisticated financial institutions, including hedge…” Source: RevenueBase Database · checked Sep 28, 2026
13	Bottomline	Indirect evidence	Portsmouth, NH, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,548 contacts →
	Indirect evidence “At Bottomline, we help businesses pay and get paid.” Source: RevenueBase Database · checked Sep 28, 2026
14	Incomm Payments	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,409 contacts →
	Indirect evidence “InComm Payments is an innovative global payments technology provider.” Source: RevenueBase Database · checked Sep 28, 2026
15	CSI	Partial evidence	Paducah, KY, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,838 contacts →
	Partial evidence “As a forward-thinking financial technology and software partner, we help community and regional banks, as well as organizations worldwide, solve their customers’ needs through…” Source: RevenueBase Database · checked Sep 28, 2026
16	I2c INC	Indirect evidence	Redwood City, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,821 contacts →
	Indirect evidence “An award-winning global financial technology innovator powering credit, debit, prepaid, core banking, and money movement solutions, i2c unifies banking and payments in an…” Source: RevenueBase Database · checked Sep 28, 2026
17	Fleetcor	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 28, 2026	5,001-10,000	1,589 contacts →
	Indirect evidence “FLEETCOR Technologies rebranded as Corpay on March 25, 2024.” Source: RevenueBase Database · checked Sep 28, 2026
18	Green DOT Corporation	Indirect evidence	Provo, UT, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,215 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 28, 2026
19	Mercury	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,149 contacts →
	Partial evidence “Mercury is the fintech ambitious companies use for banking* and all their financial workflows.” Source: RevenueBase Database · checked Sep 28, 2026
20	Marqeta	Indirect evidence	Oakland, CA, United StatesHQ checked Sep 28, 2026	501-1,000	993 contacts →
	Indirect evidence “Modern life is fueled by modern financial solutions that are so seamlessly woven into our daily lives, you almost forget they are there.” Source: RevenueBase Database · checked Sep 28, 2026
21	Galileo Financial Technologies	Partial evidence	Sandy, UT, United StatesHQ checked Sep 28, 2026	1,001-5,000	981 contacts →
	Partial evidence “Galileo, SoFi's Tech Platform, is a financial technology company that enables fintechs, banks, emerging and established brands to build differentiated financial solutions that…” Source: RevenueBase Database · checked Sep 28, 2026
22	Cross River	Indirect evidence	Fort Lee, NJ, United StatesHQ checked Sep 28, 2026	501-1,000	931 contacts →
	Indirect evidence “Cross River Bank provides technology infrastructure powering the future of financial services.” Source: RevenueBase Database · checked Sep 28, 2026
23	Volante Technologies	Indirect evidence	Jersey City, NJ, United StatesHQ checked Sep 28, 2026	501-1,000	861 contacts →
	Indirect evidence “Volante Technologies is the trusted cloud payments modernization partner to financial businesses worldwide, giving them the freedom to evolve and innovate at record speed.” Source: RevenueBase Database · checked Sep 28, 2026
24	The Bancorp	Indirect evidence	Sioux Falls, SD, United StatesHQ checked Sep 28, 2026	501-1,000	797 contacts →
	Indirect evidence “The Bancorp, Inc, headquartered in Wilmington, DE, through its subsidiary, The Bancorp Bank, N.A, headquartered in Sioux Falls, SD, is defining the future of banking.” Source: RevenueBase Database · checked Sep 28, 2026
25	Hacked By Jahidsec	Indirect evidence	Riverwoods, IL, United StatesHQ checked Sep 28, 2026	n/a	700 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: fintech software development firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names fintech software development firms.
Partial evidence: Its own public description names part of fintech software development firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name fintech software development firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,204 fintech software development firms based in the United States

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Fintech software development firms based in the United States at a glance

As of Sep 28, 2026

41.5%Verified-email coverage

168.3Average contacts per company

11-50Median size (employees)

11.3%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

448

11-50

420

51-200

210

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,204 companies.

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 software development firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, 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 software development firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names fintech software development firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among fintech software development firms, 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 its RevenueBase Smart Search 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, 83,991 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 28, 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 software development firms by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names fintech software development firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many fintech software development firms are there based in the United States?

RevenueBase identified 1,204 fintech software development firms 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?

FIS, headquartered in Jacksonville, tops this list with the largest team on record.

Which city has the most fintech software development firms?

New York leads with 136 headquartered companies, followed by San Francisco (62) and Miami (43).

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 83,991 verified decision-maker contacts tracked across these 1,204 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 28, 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 Smart Search, 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.