Company lists · Data refreshed September 2026

Top 25 Human resources information systems based in the United States

Name: Human resources information systems 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 669 companies tracked

RevenueBase identified 669 human resources information systems headquartered in the United States as of September 2026 and tracks 177,750 professional contacts across them, including 67,711 with verified work emails. San Francisco is the largest hub.

This list covers human resources information systems 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

669Companies

177,750Contacts tracked

67,711Verified emails

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The 25 largest human resources information systems based in the United States

Ranked by team size

Top 25 of 669 human resources information systems 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 human resources information systems: 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	ADP	Indirect evidence	Roseland, NJ, United StatesHQ checked Sep 20, 2026	10001+	84,166 contacts →
	Indirect evidence “Designing better ways to work through cutting-edge products, premium services and exceptional experiences that enable people to reach their full potential.” Source: RevenueBase Database · checked Sep 20, 2026
2	Paychex	Indirect evidence	Rochester, NY, United StatesHQ checked Sep 20, 2026	10001+	17,911 contacts →
	Indirect evidence “As the future of work continues to evolve, Paychex leads the way by making complex HR, payroll, and benefits brilliantly simple.” Source: RevenueBase Database · checked Sep 20, 2026
3	Paycom	Indirect evidence	Oklahoma City, OK, United StatesHQ checked Sep 20, 2026	5,001-10,000	7,002 contacts →
	Indirect evidence “Paycom (NYSE:PAYC) automates the entire employee life cycle in a truly single HR and payroll software.” Source: RevenueBase Database · checked Sep 20, 2026
4	DEEL	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	5,001-10,000	6,510 contacts →
	Indirect evidence “Deel is one platform for payroll, HR, benefits, mobility, performance, and device management across 150+ countries.” Source: RevenueBase Database · checked Sep 20, 2026
5	Rippling	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	6,303 contacts →
	Partial evidence “Rippling is a workforce management system that eliminates the friction from running a business.” Source: RevenueBase Database · checked Sep 20, 2026
6	Paylocity	Indirect evidence	Schaumburg, IL, United StatesHQ checked Sep 20, 2026	5,001-10,000	6,153 contacts →
	Indirect evidence “Paylocity (NASDAQ: PCTY) is an award-winning provider of cloud-based HR, payroll and spend management software solutions.” Source: RevenueBase Database · checked Sep 20, 2026
7	Dayforce	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 20, 2026	5,001-10,000	5,902 contacts →
	Indirect evidence “Dayforce is as a global leader in HCM technology focused on improving work for thousands of customers and millions of employees around the world.” Source: RevenueBase Database · checked Sep 20, 2026
8	GUSTO	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	3,543 contacts →
	Indirect evidence “Gusto has been growing the small business economy for 15+ years.” Source: RevenueBase Database · checked Sep 20, 2026
9	Paycor	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,615 contacts →
	Indirect evidence “Paycor’s HR, payroll, and talent platform connects leaders to people, data, and expertise.” Source: RevenueBase Database · checked Sep 20, 2026
10	SAP Successfactors	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,948 contacts →
	Partial evidence “SAP SuccessFactors is SAP’s cloud human capital management (HCM) suite built for Autonomous HCM-powered by AI and guided by people.” Source: RevenueBase Database · checked Sep 20, 2026
11	Kronos Incorporated	Indirect evidence	Lowell, MA, United StatesHQ checked Sep 20, 2026	5,001-10,000	1,889 contacts →
	Indirect evidence “Built from the merger of Ultimate Software & Kronos Inc, we are now UKG.” Source: RevenueBase Database · checked Sep 20, 2026
12	Bamboohr	Indirect evidence	Draper, UT, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,812 contacts →
	Indirect evidence “For 16 years, BambooHR has embarked on a mission to help organizations and their employees build better workplaces and achieve their unique missions.” Source: RevenueBase Database · checked Sep 20, 2026
13	HIBOB	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,669 contacts →
	Indirect evidence “HiBob is on a mission to transform how organizations operate in the modern world of work with its HR platform,"Bob." Leading the way for the future workplace, Bob offers…” Source: RevenueBase Database · checked Sep 20, 2026
14	Isolved	Strong evidence	Charlotte, NC, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,657 contacts →
	Strong evidence “isolved® isolved is a Workforce Capital Management company, the next evolution of HCM, where human workers and AI agents are governed together on a single system of record, with…” Source: RevenueBase Database · checked Sep 20, 2026
15	Avature	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,535 contacts →
	Indirect evidence “Pioneer of CRM technology for recruiting, Avature is a highly configurable enterprise SaaS platform for talent acquisition and talent management that drives innovation in the HCM…” Source: RevenueBase Database · checked Sep 20, 2026
16	Darwinbox	Indirect evidence	San Mateo, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,504 contacts →
	Indirect evidence “Darwinbox is a new-age, agile HCM Suite that enables enterprises and growing businesses to automate their day-to-day HR processes, deliver actionable insights and build better…” Source: RevenueBase Database · checked Sep 20, 2026
17	SSS	Partial evidence	Littleton, CO, United StatesHQ checked Sep 20, 2026	n/a	1,376 contacts →
	Partial evidence “Employee Based Systems (EBS) is a innovative HRMS software development, implementation training, support, and services company specializing in helping companies improve…” Source: RevenueBase Database · checked Sep 20, 2026
18	Keka HR	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 20, 2026	501-1,000	1,182 contacts →
	Indirect evidence “Keka is a leading unified HR and payroll platform that helps organizations run people operations with consistency, compliance, and operational clarity.” Source: RevenueBase Database · checked Sep 20, 2026
19	Saba Software	Indirect evidence	Dublin, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,086 contacts →
	Indirect evidence “At Saba, we know that every organization has the potential to be a great place to work, and no matter what your business does, or who you serve, or what you sell, success starts…” Source: RevenueBase Database · checked Sep 20, 2026
20	Ultimate Software	Indirect evidence	Weston, FL, United StatesHQ checked Sep 20, 2026	5,001-10,000	1,084 contacts →
	Indirect evidence “Built from the merger of Ultimate Software & Kronos Inc, we are now UKG.” Source: RevenueBase Database · checked Sep 20, 2026
21	Coadvantage	Indirect evidence	Bradenton, FL, United StatesHQ checked Sep 20, 2026	201-500	586 contacts →
	Indirect evidence “CoAdvantage is now CoAd.” Source: RevenueBase Database · checked Sep 20, 2026
22	Electronic Commerce, Inc. Eci, INC	Indirect evidence	Elkhart, IN, United StatesHQ checked Sep 20, 2026	201-500	583 contacts →
	Indirect evidence “As a leading HCM technology and services provider, Vibe HCM Inc.” Source: RevenueBase Database · checked Sep 20, 2026
23	Lattice	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	501-1,000	562 contacts →
	Indirect evidence “Our mission is to make work meaningful.” Source: RevenueBase Database · checked Sep 20, 2026
24	Prismhr	Strong evidence	Chandler, AZ, United StatesHQ checked Sep 20, 2026	201-500	436 contacts →
	Strong evidence “PrismHR creates exceptional software and services, empowering human resource outsourcing service providers such as Professional Employer Organizations (PEOs) and HR outsourcers to…” Source: RevenueBase Database · checked Sep 20, 2026
25	Workable	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	201-500	393 contacts →
	Indirect evidence “Workable is an all-in-one HR platform that helps businesses find great candidates, hire faster, and manage their teams more effectively.” 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: human resources information systems. 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 human resources information systems.
Partial evidence: Its own public description names part of human resources information systems, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name human resources information systems. 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 669 human resources information systems based in the United States

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Human resources information systems based in the United States at a glance

As of Sep 20, 2026

38.1%Verified-email coverage

265.7Average contacts per company

11-50Median size (employees)

3.1%Largest-city concentration · San Francisco

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

211

11-50

252

51-200

132

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 669 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 human resources information systems, 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 “human resources information systems”. 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 human resources information systems), 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 human resources information systems, 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, 67,711 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 human resources information systems, 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 human resources information systems are there based in the United States?

RevenueBase identified 669 human resources information systems 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?

ADP, headquartered in Roseland, tops this list with the largest team on record.

Which city has the most human resources information systems?

San Francisco leads with 21 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 67,711 verified decision-maker contacts tracked across these 669 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.