Company lists · Data refreshed September 2026

Top 25 Invoice and billing software developers based in the United States

Name: Invoice and billing software developers 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 158 companies tracked

RevenueBase identified 158 invoice and billing software developers headquartered in the United States as of September 2026 and tracks 4,782 professional contacts across them, including 1,010 with verified work emails. San Francisco is the largest hub.

This list covers invoice and billing software developers 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

158Companies

4,782Contacts tracked

1,010Verified emails

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The 25 largest invoice and billing software developers based in the United States

Ranked by team size

Top 25 of 158 invoice and billing software developers 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 invoice and billing software developers: 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	Fullsteam	Partial evidence	Auburn, AL, United StatesHQ checked Sep 28, 2026	1,001-5,000	633 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 28, 2026
2	Profitsolv	Strong evidence	West Palm Beach, FL, United StatesHQ checked Sep 28, 2026	201-500	168 contacts →
	Strong evidence “ProfitSolv is a comprehensive suite of billing, payments, and software solutions for legal, accounting, and other professional services firms including consulting, architecture…” Source: RevenueBase Database · checked Sep 28, 2026
3	Recvue	Partial evidence	Palo Alto, CA, United StatesHQ checked Sep 28, 2026	201-500	166 contacts →
	Partial 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 28, 2026
4	Bill360	Partial evidence	Tampa, FL, United StatesHQ checked Sep 28, 2026	51-200	100 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 28, 2026
5	Biller Genie	Indirect evidence	Orlando, FL, United StatesHQ checked Sep 28, 2026	51-200	83 contacts →
	Indirect evidence “At Biller Genie, we are a team of dreamers on a mission to provide an automated, cloud-based accounts receivable platform that seamlessly integrates existing business processes…” Source: RevenueBase Database · checked Sep 28, 2026
6	Symtrax	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	51-200	75 contacts →
	Indirect evidence “Symtrax delivers solutions that streamline AP/AR processing, ensure compliance, and integrate seamlessly with the ERP systems of mid-sized and large companies.” Source: RevenueBase Database · checked Sep 28, 2026
7	Skyline Payments	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	51-200	56 contacts →
	Indirect 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 28, 2026
8	Ordway	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	55 contacts →
	Indirect evidence “Ordway is a high-growth SaaS company based in Washington DC.” Source: RevenueBase Database · checked Sep 28, 2026
9	Paysimple	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	51-200	53 contacts →
	Indirect evidence “Businesses come to PaySimple with a simple, but important need – a better way to accept payments.” Source: RevenueBase Database · checked Sep 28, 2026
10	Kansys	Strong evidence	Olathe, KS, United StatesHQ checked Sep 28, 2026	51-200	36 contacts →
	Strong evidence “Kansys is a provider of billing software and services that help communications and enterprise businesses monetize complex business at scale.” Source: RevenueBase Database · checked Sep 28, 2026
11	Subscript	Strong evidence	San Francisco, United StatesHQ checked Sep 28, 2026	11-50	29 contacts →
	Strong evidence “It's time to wave goodbye to old-school billing and analytics software.” Source: RevenueBase Database · checked Sep 28, 2026
12	Zapro AI	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 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 28, 2026
13	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
14	Invoice Maker LLC	Partial evidence	Tampa, FL, United StatesHQ checked Sep 28, 2026	1-10	23 contacts →
	Partial evidence “We are a mobile invoice-management application for small businesses.” Source: RevenueBase Database · checked Sep 28, 2026
15	Timesolv Corporation	Strong evidence	Eagan, MN, United StatesHQ checked Sep 28, 2026	11-50	22 contacts →
	Strong evidence “We are developers of time billing software.” Source: RevenueBase Database · checked Sep 28, 2026
16	Crystal Computer Consulting	Indirect evidence	Janesville, WI, United StatesHQ checked Sep 28, 2026	11-50	19 contacts →
	Indirect 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
17	Chargeover	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 28, 2026	1-10	16 contacts →
	Partial evidence “Get paid faster in recurring billing or a subscription-based business.” Source: RevenueBase Database · checked Sep 28, 2026
18	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
19	Invoice2go	Partial evidence	Redwood City, CA, United StatesHQ checked Sep 28, 2026	51-200	14 contacts →
	Partial evidence “Invoice2go from BILL is a mobile invoicing solution that helps small business owners run and grow their business their way.” Source: RevenueBase Database · checked Sep 28, 2026
20	MAROO	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	11-50	11 contacts →
	Partial evidence “We help small and medium business owners to create professionally looking invoices, e-sign contracts, pay their freelancers and organize their accounting and taxes - all in one…” Source: RevenueBase Database · checked Sep 28, 2026
21	Skynova	Indirect evidence	West Chester, PA, United StatesHQ checked Sep 28, 2026	1-10	10 contacts →
	Indirect evidence “Skynova is as SaaS company, established in 2011, providing web-based business tools to small businesses.” Source: RevenueBase Database · checked Sep 28, 2026
22	Cone YC S22	Indirect evidence	San Fransisco, United StatesHQ checked Sep 28, 2026	1-10	9 contacts →
	Indirect evidence “Cone is changing the way accounting and professional services firms manage their work.” Source: RevenueBase Database · checked Sep 28, 2026
23	Connectbooster	Strong evidence	Fargo, ND, United StatesHQ checked Sep 28, 2026	11-50	9 contacts →
	Strong evidence “ConnectBooster, a Kaseya company, is a software platform that eliminates monthly accounting tasks, slashes payment fees, and automatically cuts the time from sending invoices to…” Source: RevenueBase Database · checked Sep 28, 2026
24	Mima Business INC	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 28, 2026	11-50	8 contacts →
	Indirect evidence “Introducing Mima Business Inc- Your Ultimate Business Management Solution!” Source: RevenueBase Database · checked Sep 28, 2026
25	Gulf Management Systems, INC	Indirect evidence	Clearwater, FL, United StatesHQ checked Sep 28, 2026	11-50	7 contacts →
	Indirect evidence “Gulf Management Systems offers fast, affordable payment solutions for any business.” 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: invoice and billing software developers. 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 and billing software developers.
Partial evidence: Its own public description names part of invoice and billing software developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name invoice and billing software developers. 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 158 invoice and billing software developers based in the United States

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Invoice and billing software developers based in the United States at a glance

As of Sep 28, 2026

21.1%Verified-email coverage

30.3Average contacts per company

1-10Median size (employees)

5.1%Largest-city concentration · San Francisco

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 158 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 and billing software developers, 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 and billing software developers”. 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 and billing software developers), 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 and billing software developers, 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, 1,010 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 invoice and billing software developers, 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 and billing software developers are there based in the United States?

RevenueBase identified 158 invoice and billing software developers 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?

Fullsteam, headquartered in Auburn, tops this list with the largest team on record.

Which city has the most invoice and billing software developers?

San Francisco leads with 8 headquartered companies, followed by Austin (5) and Houston (5).

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 1,010 verified decision-maker contacts tracked across these 158 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.