Company lists · Data refreshed September 2026

Top 25 Invoicing and accounting software companies based in the United States

Name: Invoicing and accounting 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 28, 2026 93 companies tracked

RevenueBase identified 93 invoicing and accounting software companies headquartered in the United States as of September 2026 and tracks 3,226 professional contacts across them, including 230 with verified work emails. Houston is the largest hub.

This list covers invoicing and accounting 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 28, 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 28, 2026 86% judged on-target in blind review

93Companies

3,226Contacts tracked

230Verified emails

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The 25 largest invoicing and accounting software companies based in the United States

Ranked by team size

Top 25 of 93 invoicing and accounting software companies based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to invoicing and accounting 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	Digits	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	51-200	84 contacts →
	Strong evidence “AI-native accounting software, that works for you!” Source: RevenueBase Database · checked Sep 28, 2026
2	Accountmate Software Corporation	Strong evidence	Petaluma, CA, United StatesHQ checked Sep 28, 2026	11-50	47 contacts →
	Strong evidence “AccountMate Software Corporation Founded in 1984, AccountMate develops and markets fully modifiable business accounting software.” Source: RevenueBase Database · checked Sep 28, 2026
3	Cougar Mountain Software	Strong evidence	Boise, ID, United StatesHQ checked Sep 28, 2026	11-50	42 contacts →
	Strong evidence “Founded in 1982, Cougar Mountain Software provides business accounting software and hardware solutions for more than retail, wholesale, nonprofit and service based businesses…” Source: RevenueBase Database · checked Sep 28, 2026
4	Passport Software, INC	Strong evidence	Northfield, IL, United StatesHQ checked Sep 28, 2026	11-50	27 contacts →
	Strong evidence “Passport Software develops comprehensive business and accounting software in the small and medium-sized business markets.” Source: RevenueBase Database · checked Sep 28, 2026
5	KICK	Strong evidence	Palo Alto, CA, United StatesHQ checked Sep 28, 2026	11-50	26 contacts →
	Strong evidence “Kick is accounting software that does the work for you.” Source: RevenueBase Database · checked Sep 28, 2026
6	RED Wing Software	Strong evidence	Red Wing, MN, United StatesHQ checked Sep 28, 2026	11-50	25 contacts →
	Strong evidence “Red Wing Software develops and supports accounting, payroll, and financial management software for small-to-mid-sized businesses, agribusinesses, nonprofits, and municipals across…” Source: RevenueBase Database · checked Sep 28, 2026
7	Invoice Home INC	Strong evidence	Austin, TX, United StatesHQ checked Sep 28, 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 28, 2026
8	Invoice Maker LLC	Indirect evidence	Tampa, FL, United StatesHQ checked Sep 28, 2026	1-10	23 contacts →
	Indirect evidence “We are a mobile invoice-management application for small businesses.” Source: RevenueBase Database · checked Sep 28, 2026
9	Timesolv Corporation	Partial evidence	Eagan, MN, United StatesHQ checked Sep 28, 2026	11-50	22 contacts →
	Partial evidence “We are developers of time billing software.” Source: RevenueBase Database · checked Sep 28, 2026
10	Crystal Computer Consulting	Partial evidence	Janesville, WI, United StatesHQ checked Sep 28, 2026	11-50	19 contacts →
	Partial evidence “Crystal Computer Consulting was founding in 1990, with the original mission to build customized business management and accounting packages for small to medium businesses.” Source: RevenueBase Database · checked Sep 28, 2026
11	Outsourced Accounting Services, LLC	Partial evidence	Port Charlotte, OR, United StatesHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “Outsourced Accounting Services provides client-focused services to address all of your firms accounting needs.” Source: RevenueBase Database · checked Sep 28, 2026
12	ESM Digital Solutions	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “ESM is a global technology consulting and RegTech company delivering SAP Consulting, Global E-Invoicing, Peppol connectivity, and digital compliance solutions.” Source: RevenueBase Database · checked Sep 28, 2026
13	Finoptimal	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	12 contacts →
	Partial evidence “We build apps for our accounting firm to close the books continuously, and now you can use those apps too.” Source: RevenueBase Database · checked Sep 28, 2026
14	Avise INC	Strong evidence	New York, United StatesHQ checked Sep 28, 2026	11-50	11 contacts →
	Strong evidence “Avise is modern accounting software that solves for QuickBooks limitations, that accountants love using, and that businesses can scale on (avoiding an ERP implementation).” Source: RevenueBase Database · checked Sep 28, 2026
15	Twinpeaks Online	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 28, 2026	1-10	10 contacts →
	Strong evidence “TwinPeaks Online provides software and web based management and accounting applications to businesses all over the world.” Source: RevenueBase Database · checked Sep 28, 2026
16	Zarmoney Accounting Software	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	11-50	6 contacts →
	Strong evidence “ZarMoney isn’t your typical off-the-shelf accounting software – it was built carefully and meticulously through several years of development to be the next-generation cloud…” Source: RevenueBase Database · checked Sep 28, 2026
17	Depositfix	Partial evidence	Frisco, TX, United StatesHQ checked Sep 28, 2026	11-50	5 contacts →
	Partial evidence “DepositFix integrates payments, invoicing, and A/R automation into CRMs and QuickBooks, helping mid-size businesses streamline cash flow and eliminate manual work.” Source: RevenueBase Database · checked Sep 28, 2026
18	Less Accounting	Strong evidence	DE, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Strong evidence “Stop using accounting software made for accountants and use software that was created for you.” Source: RevenueBase Database · checked Sep 28, 2026
19	Invoice Ninja	Partial evidence	Fort Myers, FL, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “Invoice Ninja is a leading source-code available suite of apps focusing on SMB invoicing & payments.” Source: RevenueBase Database · checked Sep 28, 2026
20	Cloudbooks	Strong evidence	St. Petersburg, FL, United StatesHQ checked Sep 28, 2026	11-50	5 contacts →
	Strong evidence “Cloudbooks is an easy-to-use online invoicing software with time tracking that helps you send invoices for your projects and customer expenses, receive payments and track the…” Source: RevenueBase Database · checked Sep 28, 2026
21	Accounting Business Solutions	Strong evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Strong evidence “Accounting Business Solutions is a respected accounting and business management software solution provider.” Source: RevenueBase Database · checked Sep 28, 2026
22	Invoiceasap	Partial evidence	Oakland, CA, United StatesHQ checked Sep 28, 2026	11-50	4 contacts →
	Partial evidence “InvoiceASAP is revolutionizing the business accounting and mobile services industries.” Source: RevenueBase Database · checked Sep 28, 2026
23	Billment	Strong evidence	Nashville, TN, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Strong evidence “A Billing and Payments solution that seamlessly integrates with your accounting software.” Source: RevenueBase Database · checked Sep 28, 2026
24	Invoicesherpa	Indirect evidence	Sacramento, CA, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “Inspired by our experience with countless businesses facing cash flow problems we knew there was a better way to get paid for their efforts.” Source: RevenueBase Database · checked Sep 28, 2026
25	Mallow	Indirect evidence	St. George, UT, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Other invoice tools take 3%+ of your revenue.” Source: RevenueBase Database · checked Sep 28, 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: invoicing and accounting 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 invoicing and accounting software companies.
Partial evidence: Its own public description names part of invoicing and accounting software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name invoicing and accounting 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 93 invoicing and accounting software companies based in the United States

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Invoicing and accounting software companies based in the United States at a glance

As of Sep 28, 2026

7.1%Verified-email coverage

34.7Average contacts per company

1-10Median size (employees)

5.4%Largest-city concentration · Houston

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

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 93 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 invoicing and accounting 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 “invoicing and accounting 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 invoicing and accounting 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 invoicing and accounting 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, 230 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 28, 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 invoicing and accounting 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 invoicing and accounting software companies are there based in the United States?

RevenueBase identified 93 invoicing and accounting 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?

Digits, headquartered in San Francisco, tops this list with the largest team on record.

Which city has the most invoicing and accounting software companies?

Houston leads with 5 headquartered companies, followed by San Francisco (4) and Atlanta (3).

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 230 verified decision-maker contacts tracked across these 93 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 28, 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.