Company lists · Data refreshed September 2026

Top 25 Invoice payment solutions based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 384 companies tracked

RevenueBase identified 384 invoice payment solutions headquartered in the United States as of September 2026 and tracks 26,701 professional contacts across them, including 10,484 with verified work emails. San Francisco is the largest hub.

This list covers invoice payment solutions 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 20, 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 20, 2026 86% judged on-target in blind review

384Companies

26,701Contacts tracked

10,484Verified emails

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The 25 largest invoice payment solutions based in the United States

Ranked by team size

Top 25 of 384 invoice payment solutions based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to invoice payment solutions: 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	RAMP	Indirect evidence	New York, FL, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,123 contacts →
	Indirect evidence “Ramp is an all-in-one financial operations platform designed to save businesses time and money.” Source: RevenueBase Database · checked Sep 20, 2026
2	Blackline	Indirect evidence	Woodland Hills, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,947 contacts →
	Indirect evidence “BlackLine (Nasdaq: BL) is building the trust infrastructure for the AI era of finance: a future where intelligence and integrity rise together across the work of finance.” Source: RevenueBase Database · checked Sep 20, 2026
3	Avidxchange, INC	Strong evidence	Charlotte, NC, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,810 contacts →
	Strong evidence “AvidXchange is the AI-powered accounts payable (AP) and payments solution built for mid-market businesses.” Source: RevenueBase Database · checked Sep 20, 2026
4	Fleetcor	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	5,001-10,000	1,589 contacts →
	Indirect evidence “FLEETCOR Technologies rebranded as Corpay on March 25, 2024.” Source: RevenueBase Database · checked Sep 20, 2026
5	Flywire	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,194 contacts →
	Partial evidence “Flywire Corporation (Nasdaq: FLYW) is a global payments enablement and software company.” Source: RevenueBase Database · checked Sep 20, 2026
6	Trevipay	Strong evidence	Overland Park, KS, United StatesHQ checked Sep 20, 2026	501-1,000	845 contacts →
	Strong evidence “TreviPay, The Pay by Invoice CompanyTM, is a fully managed B2B payments platform for global brands.” Source: RevenueBase Database · checked Sep 20, 2026
7	Billtrust	Indirect evidence	Nashville, TN, United StatesHQ checked Sep 20, 2026	501-1,000	833 contacts →
	Indirect evidence “If you’re a finance pro ready to transform accounts receivable, or a bold thinker looking to do meaningful work, Billtrust is where you belong.” Source: RevenueBase Database · checked Sep 20, 2026
8	MELIO	Partial evidence	New York, United StatesHQ checked Sep 20, 2026	501-1,000	652 contacts →
	Partial evidence “Join over businesses simplifying bill payments and optimizing cash flow with Melio.” Source: RevenueBase Database · checked Sep 20, 2026
9	Fullsteam	Indirect evidence	Auburn, AL, United StatesHQ checked Sep 20, 2026	1,001-5,000	633 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 20, 2026
10	Versapay	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	201-500	389 contacts →
	Partial evidence “Versapay is the platform that rewires AR by removing barriers from collecting and reconciling B2B payments, providing end-to-end cash flow clarity, ensuring businesses can manage…” Source: RevenueBase Database · checked Sep 20, 2026
11	Fortis	Partial evidence	Plano, TX, United StatesHQ checked Sep 20, 2026	201-500	359 contacts →
	Partial evidence “Payments shouldn’t live outside your business systems.” Source: RevenueBase Database · checked Sep 20, 2026
12	Tradeshift	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	501-1,000	359 contacts →
	Indirect evidence “Leading AP automation software \| Reduce processing cost by 90%\| For large and mid-sized companies \| Our customers include DHL, Danone, HSBC, Kuehne + Nagel, and Air France KLM.” Source: RevenueBase Database · checked Sep 20, 2026
13	Stampli	Partial evidence	Mountain View, CA, United StatesHQ checked Sep 20, 2026	201-500	343 contacts →
	Partial evidence “Stampli helps finance teams achieve stress-free finance by through a Procure-to-Pay solution that works for you.” Source: RevenueBase Database · checked Sep 20, 2026
14	Finally	Indirect evidence	Miami, FL, United StatesHQ checked Sep 20, 2026	201-500	331 contacts →
	Indirect evidence “Finally is a fast growing fintech company whose mission is to help small & medium sized businesses automate their accounting and finance.” Source: RevenueBase Database · checked Sep 20, 2026
15	Celero Commerce	Partial evidence	Nashville, TN, United StatesHQ checked Sep 20, 2026	201-500	313 contacts →
	Partial evidence “Celero Commerce offers payment processing services, business management software, and data intelligence to small and medium-sized businesses, in one holistic platform.” Source: RevenueBase Database · checked Sep 20, 2026
16	Paystand	Partial evidence	Santa Cruz, CA, United StatesHQ checked Sep 20, 2026	201-500	241 contacts →
	Partial evidence “Paystand's on a mission to create a more open financial system, starting with B2B payments.” Source: RevenueBase Database · checked Sep 20, 2026
17	Slice Merchant Services	Strong evidence	Holmdel, NJ, United StatesHQ checked Sep 20, 2026	201-500	217 contacts →
	Strong 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 20, 2026
18	Ebizcharge	Partial evidence	Irvine, CA, United StatesHQ checked Sep 20, 2026	201-500	210 contacts →
	Partial evidence “EBizCharge is the leading all-in-one integrated payment platform that helps businesses facilitate electronic payment processing, enhance transaction security, and increase client…” Source: RevenueBase Database · checked Sep 20, 2026
19	rev.io	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	51-200	192 contacts →
	Partial evidence “Rev.io is the only provider to seamlessly integrate native communication billing, professional service automation (PSA), and payment processing-delivering a comprehensive…” Source: RevenueBase Database · checked Sep 20, 2026
20	Global Payex	Partial evidence	Rockville, MD, United StatesHQ checked Sep 20, 2026	51-200	189 contacts →
	Partial evidence “Global PayEX is a B2B payments modernization-focused SaaS company which offers AI powered cloud platform for working capital optimization in B2B AR (accounts receivable) & AP…” Source: RevenueBase Database · checked Sep 20, 2026
21	Pairsoft	Indirect evidence	Miami, FL, United StatesHQ checked Sep 20, 2026	51-200	172 contacts →
	Indirect evidence “PairSoft, one of the strongest financial automation platforms for mid-market and enterprise organizations, comprises a product lineup that natively integrates with Microsoft…” Source: RevenueBase Database · checked Sep 20, 2026
22	Recvue	Indirect evidence	Palo Alto, CA, United StatesHQ checked Sep 20, 2026	201-500	166 contacts →
	Indirect evidence “RecVue empowers enterprises to modernize their billing and revenue operations at speed and scale by harnessing previously untapped revenue potential and leveraging front-office…” Source: RevenueBase Database · checked Sep 20, 2026
23	Merchante	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	201-500	152 contacts →
	Indirect evidence “MerchantE provides a financial technology platform that drives digital commerce and supports the money management needs of growing businesses.” Source: RevenueBase Database · checked Sep 20, 2026
24	Flashbanc, LLC	Partial evidence	Boca Raton, FL, United StatesHQ checked Sep 20, 2026	501-1,000	152 contacts →
	Partial 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 20, 2026
25	TABS	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	148 contacts →
	Indirect evidence “Tabs is an AI-native revenue platform for modern finance and accounting teams.” Source: RevenueBase Database · checked Sep 20, 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: invoice payment solutions. 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 invoice payment solutions.
Partial evidence: Its own public description names part of invoice payment solutions, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name invoice payment solutions. 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 384 invoice payment solutions based in the United States

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Invoice payment solutions based in the United States at a glance

As of Sep 20, 2026

39.3%Verified-email coverage

69.5Average contacts per company

11-50Median size (employees)

5.7%Largest-city concentration · San Francisco

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

134

11-50

130

51-200

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 384 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 invoice payment solutions, 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 “invoice payment solutions”. 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 invoice payment solutions), 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 invoice payment solutions, 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, 10,484 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 20, 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 invoice payment solutions, 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 invoice payment solutions are there based in the United States?

RevenueBase identified 384 invoice payment solutions 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?

RAMP, headquartered in Miami, tops this list with the largest team on record.

Which city has the most invoice payment solutions?

San Francisco leads with 22 headquartered companies, followed by New York (16) and Atlanta (15).

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 10,484 verified decision-maker contacts tracked across these 384 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 20, 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.