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Company lists · Data refreshed September 2026

Top 25 Payment systems consulting firms based in the United States

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 1,750 companies tracked

RevenueBase identified 1,750 payment systems consulting firms headquartered in the United States as of September 2026 and tracks 54,604 professional contacts across them, including 16,696 with verified work emails and 20,035 with mobile numbers. New York is the largest hub.

This list covers payment systems consulting 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review
1,750Companies
54,604Contacts tracked
16,696Verified emails
20,035Mobile numbers
Unlock all 1,750 companies Free signup · no credit card · 500 free credits

The 25 largest payment systems consulting firms based in the United States

Ranked by team size
Top 25 of 1,750 payment systems consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names payment systems consulting firms: 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.
#CompanyHeadquartersEmployeesContacts
1
First Data CorporationIndirect evidence
Brookfield, United StatesHQ checked Sep 5, 202610001+6,608

“First Data is now Fiserv (NASDAQ:FISV).”

Source: company website · checked Sep 5, 2026
2
ACI WorldwidePartial evidence
Elkhorn, NE, United StatesHQ checked Sep 5, 20261,001-5,0004,588

“ACI Worldwide, an original innovator in global payments technology, delivers transformative software solutions that power intelligent payments orchestration in real time so banks…”

Source: company website · checked Sep 5, 2026
3
HeartlandPartial evidence
Oklahoma City, OK, United StatesHQ checked Sep 5, 20261,001-5,0003,787

“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 5, 2026
4
DeluxePartial evidence
Minneapolis, MN, United StatesHQ checked Sep 5, 20265,001-10,0003,695

“Deluxe, a trusted payments and data company, champions business so communities thrive.”

Source: company website · checked Sep 5, 2026
5
EvertecPartial evidence
San Juan, PR, United StatesHQ checked Sep 5, 20265,001-10,0003,157

“EVERTEC, Inc.(NYSE: EVTC) is a leading full-service transaction processing business in Latin America, providing a broad range of merchant acquiring, payment processing and…”

Source: company website · checked Sep 5, 2026
6
ElavonIndirect evidence
Atlanta, GA, United StatesHQ checked Sep 5, 20261,001-5,0002,885

“Elavon, a wholly owned subsidiary of U.S.”

Source: company website · checked Sep 5, 2026
7
BottomlineIndirect evidence
Portsmouth, NH, United StatesHQ checked Sep 5, 20261,001-5,0002,548

“At Bottomline, we help businesses pay and get paid.”

Source: company website · checked Sep 5, 2026
8
Shift4Indirect evidence
Center Valley, PA, United StatesHQ checked Sep 5, 20261,001-5,0002,138

“Shift4 (NYSE: FOUR) powers the experience economy, enabling businesses to deliver the moments that matter.”

Source: company website · checked Sep 5, 2026
9
Opus TechnologiesPartial evidence
Alpharetta, GA, United StatesHQ checked Sep 5, 2026501-1,0001,011

“Opus is a trusted engineering partner to payment providers, banks, and fintechs navigating change in a real-time, digital-first world.”

Source: company website · checked Sep 5, 2026
10
Wholesale PaymentsPartial evidence
Lubbock, TX, United StatesHQ checked Sep 5, 2026201-500483

“Founded in 2007, Wholesale Payments is one of the nation's largest privately held merchant services providers, providing credit card processing, POS solutions, and…”

Source: company website · checked Sep 5, 2026
11
EVO Payments, INCIndirect evidence
Atlanta, GA, United StatesHQ checked Sep 5, 20261,001-5,000434
Source: company website · checked Sep 5, 2026
12
REPAYPartial evidence
Atlanta, GA, United StatesHQ checked Sep 5, 2026201-500430

“REPAY, established in 2006, is a full-service payment technology and processing provider that enables the expedient and secure collection of payments through any channel at any…”

Source: company website · checked Sep 5, 2026
13
Corecard Software, INCPartial evidence
Norcross, GA, United StatesHQ checked Sep 5, 20261,001-5,000409

“CoreCard is a leading issuer-processor and provider of card management and transaction processing systems.”

Source: company website · checked Sep 5, 2026
14
HypercomPartial evidence
Suite 300, AZ, United StatesHQ checked Sep 5, 20261,001-5,000361

“Hypercom Corporation is one of the largest global providers of complete electronic payment solutions and value-added services at the point-of-transaction.”

Source: company website · checked Sep 5, 2026
15
MontranIndirect evidence
New York, NY, United StatesHQ checked Sep 5, 2026501-1,000332

“For over 45 years, Montran has helped financial institutions operate and modernize critical financial infrastructure in more than 90 countries worldwide.”

Source: company website · checked Sep 5, 2026
16
Jetpay NOW NCR Payment SolutionsIndirect evidence
Allentown, United StatesHQ checked Sep 5, 2026n/a331

“Acquired by NCR Corporation 12/2018.”

Source: company website · checked Sep 5, 2026
17
VizypayPartial evidence
Waukee, IA, United StatesHQ checked Sep 5, 202651-200327

“VizyPay is revolutionizing the payments industry by offering a credit card processing model that focuses on powerful payment solutions, real human customer support, and simple…”

Source: company website · checked Sep 5, 2026
18
PAX Technology, Inc. North AmericaIndirect evidence
Jacksonville, FL, United StatesHQ checked Sep 5, 2026201-500319

“Founded in 2001, PAX Technology, Inc.”

Source: company website · checked Sep 5, 2026
19
Electronic Merchant SystemsIndirect evidence
Cleveland, OH, United StatesHQ checked Sep 5, 2026201-500306

“Our mission is to be the industry leader in merchant services by providing an innovative suite of business solutions, a high level of quality service, and having professional…”

Source: company website · checked Sep 5, 2026
20
TALUSPartial evidence
Dallas, TX, United StatesHQ checked Sep 5, 202651-200299

“Talus is the premier choice for small business payment processing.”

Source: company website · checked Sep 5, 2026
21
Riverside PaymentsPartial evidence
Vancouver, WA, United StatesHQ checked Sep 5, 2026201-500270

“At Riverside Payments, our mission is clear: to provide the best payment solutions at the best price, coupled with unparalleled nationwide service.”

Source: company website · checked Sep 5, 2026
22
CardconnectPartial evidence
King Of Prussia, PA, United StatesHQ checked Sep 5, 20265,001-10,000263

“CardConnect, a Fiserv company, is a leading payment technology provider empowering ISOs, agents, and businesses with innovative, secure, and scalable payment solutions.”

Source: company website · checked Sep 5, 2026
23
PAYAPartial evidence
Atlanta, GA, United StatesHQ checked Sep 5, 2026201-500196

“Paya, a Nuvei Company, is a leading provider of integrated payment and frictionless commerce solutions that help customers accept and make payments, expedite receipt of money, and…”

Source: company website · checked Sep 5, 2026
24
Electronic PaymentsPartial evidence
Calverton, NY, United StatesHQ checked Sep 5, 2026501-1,000184

“Electronic Payments is an industry leader in developing and delivering innovative payment processing and point of sale solutions to companies nationwide.”

Source: company website · checked Sep 5, 2026
25
Clai Payments TechnologiesPartial evidence
Houston, TX, United StatesHQ checked Sep 5, 202651-200176

“We are experts in the supply of payment solutions for more than 30 years, owning 8 regional offices in the continent.”

Source: company website · checked Sep 5, 2026

Showing 25 of 1,750 payment systems consulting firms based in the United States

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Payment systems consulting firms based in the United States at a glance

As of Sep 5, 2026
11-50Median size (employees)
New YorkLargest hub · 66 HQs
20,035Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
833
11-50
585
51-200
235
201-500
49
501-1,000
17
1,001-5,000
19
5,001-10,000
4
10001+
3

Verified emails by last verification

0–30
15,513
31–60
999
61–90
8
90–180
9
180+
167

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 payment systems consulting firms, 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 “payment systems consulting firms”. 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 payment systems consulting 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 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, 16,696 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 5, 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.

Payment systems consulting firms by metro

Frequently asked

How many payment systems consulting firms are there based in the United States?

RevenueBase identified 1,750 payment systems consulting 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?

First Data Corporation, headquartered in United States, tops this list with the largest team on record.

Which city has the most payment systems consulting firms?

New York leads with 66 headquartered companies, followed by Miami (35) and Atlanta (30).

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 16,696 verified decision-maker contacts tracked across these 1,750 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 5, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,750 payment systems consulting firms based in the United States. Start with a free account, no credit card.

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Related lists

Browse: Companies home · All United States lists · All Payment systems consulting firms lists · New lists

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.

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