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, how directly it supports the match, 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 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 4, 2026 86% judged on-target in blind review

234Companies

11,762Contacts tracked

3,881Verified emails

3,721Mobile numbers

Unlock all 234 companies Free signup · no credit card · 500 free credits

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. Evidence rates how directly each company's own description names invoice payment software companies: 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.
#	Company	Headquarters	Employees	Contacts
1	BilltrustIndirect evidence	Nashville, NJ, United StatesHQ checked Sep 4, 2026	501-1,000	825
	“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: company website · checked Sep 4, 2026
2	FullsteamPartial evidence	Auburn, GA, United StatesHQ checked Sep 4, 2026	1,001-5,000	624
	“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: company website · checked Sep 4, 2026
3	FortisPartial evidence	Plano, TX, United StatesHQ checked Sep 4, 2026	201-500	358
	“Payments shouldn’t live outside your business systems.” Source: company website · checked Sep 4, 2026
4	Celero CommerceStrong evidence	Nashville, TN, United StatesHQ checked Sep 4, 2026	201-500	310
	“Celero Commerce offers payment processing services, business management software, and data intelligence to small and medium-sized businesses, in one holistic platform.” Source: company website · checked Sep 4, 2026
5	Stax PaymentsPartial evidence	Orlando, FL, United StatesHQ checked Sep 4, 2026	201-500	291
	“Stax Payments is a leading, high-growth payments technology firm specializing in integrated payments, recurring billing, and SMB processing.” Source: company website · checked Sep 4, 2026
6	EbizchargePartial evidence	Irvine, CA, United StatesHQ checked Sep 4, 2026	201-500	205
	“EBizCharge is the leading all-in-one integrated payment platform that helps businesses facilitate electronic payment processing, enhance transaction security, and increase client…” Source: company website · checked Sep 4, 2026
7	GET BeyondIndirect evidence	Princeton, NJ, United StatesHQ checked Sep 4, 2026	501-1,000	185
	“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: company website · checked Sep 4, 2026
8	Ipayment, INCPartial evidence	Westlake Village, MA, United StatesHQ checked Sep 4, 2026	201-500	135
	“iPayment is a trusted provider of payment processing solutions in the U.S.” Source: company website · checked Sep 4, 2026
9	Thryv-Business-AdvisorsIndirect evidence	Dallas, TX, United StatesHQ checked Sep 4, 2026	n/a	98
	“Running a small business can feel overwhelming.” Source: company website · checked Sep 4, 2026
10	Bill360Partial evidence	Tampa, FL, United StatesHQ checked Sep 4, 2026	51-200	97
	“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: company website · checked Sep 4, 2026
11	PropelrPartial evidence	Wayne, PA, United StatesHQ checked Sep 4, 2026	51-200	85
	“We’re changing the way people think about payments.” Source: company website · checked Sep 4, 2026
12	PayzliPartial evidence	Tampa, FL, United StatesHQ checked Sep 4, 2026	51-200	70
	“Payzli, living up to its tagline "for the joy of business," is at the cutting edge of payment technology.” Source: company website · checked Sep 4, 2026
13	Skyline PaymentsPartial evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	57
	“Skyline Payments powers B2B transactions for small and midsize businesses, directly integrating payments into ERP, accounting, and eCommerce systems.” Source: company website · checked Sep 4, 2026
14	PaysimplePartial evidence	Denver, CO, United StatesHQ checked Sep 4, 2026	51-200	53
	“Businesses come to PaySimple with a simple, but important need – a better way to accept payments.” Source: company website · checked Sep 4, 2026
15	BNG PaymentsPartial evidence	Fargo, ND, United StatesHQ checked Sep 4, 2026	51-200	47
	“BNG Payments is now part of Kaseya, the leading security and IT management company.” Source: company website · checked Sep 4, 2026
16	RebillyPartial evidence	Austin, TX, United StatesHQ checked Sep 4, 2026	11-50	45
	“We’ve solved payments so you don’t have to.” Source: company website · checked Sep 4, 2026
17	Zapro AIPartial evidence	Portland, OR, United StatesHQ checked Sep 4, 2026	11-50	28
	“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: company website · checked Sep 4, 2026
18	Invoice Home INCStrong evidence	Austin, TX, United StatesHQ checked Sep 4, 2026	11-50	24
	“Invoice Home is a leading invoice generating software designed for the invoicing needs of small businesses, freelancers, and entrepreneurs worldwide.” Source: company website · checked Sep 4, 2026
19	Invoice Maker LLCPartial evidence	Tampa, FL, United StatesHQ checked Sep 4, 2026	1-10	23
	“We are a mobile invoice-management application for small businesses.” Source: company website · checked Sep 4, 2026
20	KastenberryPartial evidence	Kansas City, MO, United StatesHQ checked Sep 4, 2026	11-50	22
	“KastenBerry is a boutique payments company in the heart of the US delivering world-class merchant services with the integrity.” Source: company website · checked Sep 4, 2026
21	Eservices Payment TechnologyStrong evidence	Pittsburgh, PA, United StatesHQ checked Sep 4, 2026	11-50	22
	“eServices Technology is an innovative, agile software company built on the entrepreneurial spirit, providing digital payment solutions for first responders, nonprofits, schools…” Source: company website · checked Sep 4, 2026
22	DenefitsStrong evidence	Irvine, CA, United StatesHQ checked Sep 4, 2026	201-500	22
	“Denefits is a business payment software platform built to help companies make it easier for customers to move forward.” Source: company website · checked Sep 4, 2026
23	Infinity Data CorpPartial evidence	Sharon, MA, United StatesHQ checked Sep 4, 2026	51-200	21
	“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: company website · checked Sep 4, 2026
24	Vivid CommerceIndirect evidence	Sausalito, CA, United StatesHQ checked Sep 4, 2026	11-50	20
	“Vivid Commerce is the platform for connected commerce.” Source: company website · checked Sep 4, 2026
25	PrahsysPartial evidence	The Woodlands, TX, United StatesHQ checked Sep 4, 2026	11-50	20
	“Prahsys is a payment processing platform founded on the idea that SaaS companies and their subscribers deserve better.” Source: company website · checked Sep 4, 2026

Showing 25 of 234 invoice payment software companies based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 3,881 reachable decision-makers.

Free signup · no credit card

See all 234 companies

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

As of Sep 4, 2026

1-10Median size (employees)

AtlantaLargest hub · 8 HQs

3,721Contacts with mobile numbers

Sep 4, 2026Data 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+

Verified emails by last verification

0–30

31–60

315

61–90

2,099

90–180

1,457

180+

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 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 “invoice payment software companies”. 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 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 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, 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

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.

Ready to reach these companies? Verified emails and direct dials for all 234 invoice payment software companies based in the United States. Start with a free account, no credit card.

Get the full list

Related lists

Invoice payment software companies by geography

Browse the directory

Browse: Companies home · All United States lists · All Invoice payment software companies 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.