Company lists · Data refreshed September 2026

Top 25 Invoice payment software companies based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 234 companies tracked

RevenueBase identified 234 invoice payment software companies headquartered in the United States as of September 2026 and tracks 11,762 professional contacts across them, including 3,881 with verified work emails and 3,721 with mobile numbers. Atlanta is the largest hub.

This list covers invoice payment 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 4, 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 4, 2026 86% judged on-target in blind review

234Companies

11,762Contacts tracked

3,881Verified emails

3,721Mobile numbers

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The 25 largest invoice payment software companies based in the United States

Ranked by team size

Top 25 of 234 invoice payment software companies based in the United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. RevenueBase Smart Search rates how each company's information relates to invoice payment software companies: 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	Billtrust	Indirect evidence	Nashville, NJ, United StatesHQ checked Sep 4, 2026	501-1,000	825 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 4, 2026
2	Fullsteam	Partial evidence	Auburn, GA, United StatesHQ checked Sep 4, 2026	1,001-5,000	624 contacts →
	Partial 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 4, 2026
3	Fortis	Partial evidence	Plano, TX, United StatesHQ checked Sep 4, 2026	201-500	358 contacts →
	Partial evidence “Payments shouldn’t live outside your business systems.” Source: RevenueBase Database · checked Sep 4, 2026
4	Celero Commerce	Strong evidence	Nashville, TN, United StatesHQ checked Sep 4, 2026	201-500	310 contacts →
	Strong 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 4, 2026
5	Stax Payments	Partial evidence	Orlando, FL, United StatesHQ checked Sep 4, 2026	201-500	291 contacts →
	Partial evidence “Stax Payments is a leading, high-growth payments technology firm specializing in integrated payments, recurring billing, and SMB processing.” Source: RevenueBase Database · checked Sep 4, 2026
6	Ebizcharge	Partial evidence	Irvine, CA, United StatesHQ checked Sep 4, 2026	201-500	205 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 4, 2026
7	GET Beyond	Indirect evidence	Princeton, NJ, United StatesHQ checked Sep 4, 2026	501-1,000	185 contacts →
	Indirect evidence “Get Beyond strives to help owners of small and mid-size businesses save time and reduce costs by simplifying their complex back office operations.” Source: RevenueBase Database · checked Sep 4, 2026
8	Ipayment, INC	Partial evidence	Westlake Village, MA, United StatesHQ checked Sep 4, 2026	201-500	135 contacts →
	Partial evidence “iPayment is a trusted provider of payment processing solutions in the U.S.” Source: RevenueBase Database · checked Sep 4, 2026
9	Thryv-Business-Advisors	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 4, 2026	n/a	98 contacts →
	Indirect evidence “Running a small business can feel overwhelming.” Source: RevenueBase Database · checked Sep 4, 2026
10	Bill360	Partial evidence	Tampa, FL, United StatesHQ checked Sep 4, 2026	51-200	97 contacts →
	Partial evidence “Get paid an average of 36% faster than your existing accounts receivable (AR) processes with the only AR automation and digital invoicing platform built for B2B companies.” Source: RevenueBase Database · checked Sep 4, 2026
11	Propelr	Partial evidence	Wayne, PA, United StatesHQ checked Sep 4, 2026	51-200	85 contacts →
	Partial evidence “We’re changing the way people think about payments.” Source: RevenueBase Database · checked Sep 4, 2026
12	Payzli	Partial evidence	Tampa, FL, United StatesHQ checked Sep 4, 2026	51-200	70 contacts →
	Partial evidence “Payzli, living up to its tagline "for the joy of business," is at the cutting edge of payment technology.” Source: RevenueBase Database · checked Sep 4, 2026
13	Skyline Payments	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	57 contacts →
	Partial evidence “Skyline Payments powers B2B transactions for small and midsize businesses, directly integrating payments into ERP, accounting, and eCommerce systems.” Source: RevenueBase Database · checked Sep 4, 2026
14	Paysimple	Partial evidence	Denver, CO, United StatesHQ checked Sep 4, 2026	51-200	53 contacts →
	Partial evidence “Businesses come to PaySimple with a simple, but important need – a better way to accept payments.” Source: RevenueBase Database · checked Sep 4, 2026
15	BNG Payments	Partial evidence	Fargo, ND, United StatesHQ checked Sep 4, 2026	51-200	47 contacts →
	Partial evidence “BNG Payments is now part of Kaseya, the leading security and IT management company.” Source: RevenueBase Database · checked Sep 4, 2026
16	Rebilly	Partial evidence	Austin, TX, United StatesHQ checked Sep 4, 2026	11-50	45 contacts →
	Partial evidence “We’ve solved payments so you don’t have to.” Source: RevenueBase Database · checked Sep 4, 2026
17	Zapro AI	Partial evidence	Portland, OR, United StatesHQ checked Sep 4, 2026	11-50	28 contacts →
	Partial evidence “At Zapro, we are committed to revolutionizing the procurement and invoicing landscape by providing innovative, user-friendly, and reliable solutions for businesses of all sizes.” Source: RevenueBase Database · checked Sep 4, 2026
18	Invoice Home INC	Strong evidence	Austin, TX, United StatesHQ checked Sep 4, 2026	11-50	24 contacts →
	Strong evidence “Invoice Home is a leading invoice generating software designed for the invoicing needs of small businesses, freelancers, and entrepreneurs worldwide.” Source: RevenueBase Database · checked Sep 4, 2026
19	Invoice Maker LLC	Partial evidence	Tampa, FL, United StatesHQ checked Sep 4, 2026	1-10	23 contacts →
	Partial evidence “We are a mobile invoice-management application for small businesses.” Source: RevenueBase Database · checked Sep 4, 2026
20	Kastenberry	Partial evidence	Kansas City, MO, United StatesHQ checked Sep 4, 2026	11-50	22 contacts →
	Partial evidence “KastenBerry is a boutique payments company in the heart of the US delivering world-class merchant services with the integrity.” Source: RevenueBase Database · checked Sep 4, 2026
21	Eservices Payment Technology	Strong evidence	Pittsburgh, PA, United StatesHQ checked Sep 4, 2026	11-50	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 4, 2026
22	Denefits	Strong evidence	Irvine, CA, United StatesHQ checked Sep 4, 2026	201-500	22 contacts →
	Strong evidence “Denefits is a business payment software platform built to help companies make it easier for customers to move forward.” Source: RevenueBase Database · checked Sep 4, 2026
23	Infinity Data Corp	Partial evidence	Sharon, MA, United StatesHQ checked Sep 4, 2026	51-200	21 contacts →
	Partial evidence “Infinity Data is a pioneering technology company that offers an enhanced B2B payment processing platform, providing comprehensive tools for managing the receipt of payments for…” Source: RevenueBase Database · checked Sep 4, 2026
24	Vivid Commerce	Indirect evidence	Sausalito, CA, United StatesHQ checked Sep 4, 2026	11-50	20 contacts →
	Indirect evidence “Vivid Commerce is the platform for connected commerce.” Source: RevenueBase Database · checked Sep 4, 2026
25	Prahsys	Partial evidence	The Woodlands, TX, United StatesHQ checked Sep 4, 2026	11-50	20 contacts →
	Partial evidence “Prahsys is a payment processing platform founded on the idea that SaaS companies and their subscribers deserve better.” Source: RevenueBase Database · checked Sep 4, 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 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 invoice payment software companies.
Partial evidence: Its own public description names part of invoice payment software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name invoice payment 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 234 invoice payment software companies based in the United States

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Invoice payment software companies based in the United States at a glance

As of Sep 4, 2026

33.0%Verified-email coverage

31.6%Mobile-number coverage

50.3Average contacts per company

1-10Median size (employees)

3.4%Largest-city concentration · Atlanta

Sep 4, 2026Page data refreshed

Companies by employee count

1-10

123

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

31531–60

2,09961–90

1,45790–180

10180+

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 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 “invoice payment 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 invoice payment 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 invoice payment 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, 3,881 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 4, 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 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 invoice payment software companies are there based in the United States?

RevenueBase identified 234 invoice payment 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?

Billtrust, headquartered in Hamilton Township, tops this list with the largest team on record.

Which city has the most invoice payment software companies?

Atlanta leads with 8 headquartered companies, followed by New York (8) and Dallas (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 3,881 verified decision-maker contacts tracked across these 234 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 4, 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.