Company lists · Data refreshed September 2026
Top 25 Nonprofit payment gateway software companies based in the United States
RevenueBase identified 260 nonprofit payment gateway software companies headquartered in the United States as of September 2026 and tracks 4,411 professional contacts across them, including 1,751 with verified work emails. Los Angeles is the largest hub.
This list covers nonprofit payment gateway software companies 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 14, 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.
The 25 largest nonprofit payment gateway software companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 461 contacts → | ||||
Strong evidence “NMI is powering the next generation of embedded payments with its modular payment acceptance platform and industry-leading gateway.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 2 | 336 contacts → | ||||
Indirect evidence “Fundraise Up is a technology company unlocking the world’s generosity potential by optimizing the way people give.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 3 | 301 contacts → | ||||
Partial evidence “Vanco serves a wide variety of community organizations and software vendors, each with their own needs.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 4 | 300 contacts → | ||||
Partial evidence “Echelon Payment Solutions Group Built by sales partners, for sales partners-merchant by merchant.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 5 | 252 contacts → | ||||
Partial evidence “Clover creates software for real people.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 6 | 217 contacts → | ||||
Partial evidence “Payment Solutions for Every Business 0% Processing Fee Program POS Systems • Local Sales & Support Helping businesses save more with every transaction.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 7 | 215 contacts → | ||||
Partial evidence “FreeWill builds technology to make the largest and most impactful charitable donations easier for donors to give and simpler for nonprofit organizations to receive.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 8 | 152 contacts → | ||||
Strong evidence “FlashBanc provides cloud-based electronic payments and social marketing software services to thousands of small, medium and large businesses, and has the Inc.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 9 | 149 contacts → | ||||
Indirect evidence “Donorbox is an all-in-one fundraising platform built to maximize every giving opportunity and strengthen donor loyalty.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 10 | 121 contacts → | ||||
Indirect evidence “Now a Payroc Company” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 11 | 86 contacts → | ||||
Partial evidence “We’re changing the way people think about payments.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 12 | 81 contacts → | ||||
Strong evidence “Greater Giving, a Global Payments company, works exclusively with schools and nonprofits across the United States and Canada-offering integrated technologies to help simplify…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 13 | 76 contacts → | ||||
Strong evidence “Segpay is a global payment platform, offering custom solutions including payment facilitator, direct merchant accounts and secure online payment gateway services.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 14 | 74 contacts → | ||||
Partial evidence “JOIN OUR TEAM WE ARE ALWAYS SEARCHING FOR TOP TALENT We are a local integrated portfolio of payment processing, risk management, and recovery solutions for merchant organizations…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 15 | 54 contacts → | ||||
Partial evidence “We power the payments that help grow your business.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 16 | 47 contacts → | ||||
Indirect evidence “GETTRX, powered by Global Electronic Technology, Inc, is a wholesale ISO with 32 years of experience in the merchant services space that has transformed into a premiere financial…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 17 | 40 contacts → | ||||
Partial evidence “Service First Processing (SFP) provides modern payment and financial automation solutions designed to help businesses simplify how money moves through their organization.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 18 | 40 contacts → | ||||
Indirect evidence “BankCard USA, is a credit card processing company that specializes in new or existing businesses.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 19 | 38 contacts → | ||||
Partial evidence “CharityEngine offers a complete nonprofit fundraising platform with the most built-in tools in the industry and our unique billing technology, SustainerIQ.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 20 | 37 contacts → | ||||
Partial evidence “Since 1996, Authorize.net has been a leading provider of payment management solutions, managing the submission of billions of transactions to the processing networks on behalf of…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 21 | 36 contacts → | ||||
Partial evidence “United Thinkers specializes in providing cutting-edge payment solutions, with a focus on empowering payment facilitators, payment aggregators, and other businesses seeking…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 22 | 25 contacts → | ||||
Indirect evidence “Revv is a donation and fundraising platform that was founded in 2014 by online fundraisers who couldn’t find another solution that suited their needs for raising money online.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 23 | 24 contacts → | ||||
Strong evidence “Inovio is the revolutionary payments gateway with seamless integration and global scalability that continuously evolves with the industry.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 24 | 22 contacts → | ||||
Strong evidence “eServices Technology is an innovative, agile software company built on the entrepreneurial spirit, providing digital payment solutions for first responders, nonprofits, schools…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 25 | 22 contacts → | ||||
Partial evidence “Anedot is the online giving platform trusted by nonprofits, churches, campaigns, and schools to raise more money and save time.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
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: nonprofit payment gateway software companies. 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 nonprofit payment gateway software companies.
- Partial evidence
- Its own public description names part of nonprofit payment gateway software companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name nonprofit payment gateway software companies. 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 260 nonprofit payment gateway software companies based in the United States
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Nonprofit payment gateway software companies based in the United States at a glance
As of Sep 14, 2026Companies by employee count
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 260 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 nonprofit payment gateway software companies, 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 “nonprofit payment gateway software companies”. 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 nonprofit payment gateway software companies), 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 nonprofit payment gateway software companies, 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, 1,751 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 14, 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.
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 nonprofit payment gateway software companies, 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 nonprofit payment gateway software companies are there based in the United States?
RevenueBase identified 260 nonprofit payment gateway software companies 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?
NMI, headquartered in Schaumburg, tops this list with the largest team on record.
Which city has the most nonprofit payment gateway software companies?
Los Angeles leads with 8 headquartered companies, followed by Chicago (7) and New York (7).
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 1,751 verified decision-maker contacts tracked across these 260 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 14, 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.
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