Company lists · Data refreshed September 2026

Top 25 HR software professional services based in Chicago, United States

Name: HR software professional services based in Chicago, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 26, 2026 107 companies tracked

RevenueBase identified 107 HR software professional services headquartered in Chicago, United States as of September 2026 and tracks 1,633 professional contacts across them, including 717 with verified work emails. New York is the largest hub.

This list covers HR software professional services headquartered in Chicago, 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 26, 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 26, 2026 86% judged on-target in blind review

107Companies

1,633Contacts tracked

717Verified emails

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The 25 largest HR software professional services based in Chicago, United States

Ranked by team size

Top 25 of 107 HR software professional services based in Chicago, United States, ranked by team size, largest first. Data refreshed Sep 26, 2026. RevenueBase Smart Search rates how each company's information relates to HR software professional services: 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	Topbloc	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	501-1,000	756 contacts →
	Indirect evidence “Everforth TopBloc leverages proprietary automation to deploy Workday’s Human Capital Management, Payroll, and Financials business services quickly and efficiently, reducing…” Source: RevenueBase Database · checked Sep 26, 2026
2	Advanced Resources	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	n/a	223 contacts →
	Indirect evidence “Over our 30+ year history, Advanced Resources has supported thousands of clients as they tackle their human capital challenges by providing staffing, direct hire, and consulting…” Source: RevenueBase Database · checked Sep 26, 2026
3	Advanced Group	Partial evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	501-1,000	125 contacts →
	Partial evidence “Advanced Group provides expertise in talent acquisition and management, outsourcing, and professional services.” Source: RevenueBase Database · checked Sep 26, 2026
4	RJ Reliance, INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	11-50	34 contacts →
	Indirect evidence “RJ Reliance is the leading client-focused Human Capital Management solution and service partner.” Source: RevenueBase Database · checked Sep 26, 2026
5	Instant Technology	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	51-200	25 contacts →
	Indirect evidence “We are Instant Technology.” Source: RevenueBase Database · checked Sep 26, 2026
6	Arlington Resources	Partial evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	11-50	24 contacts →
	Partial evidence “Arlington Resources specializes in the placement of Human Resources Professionals for direct hire, contract and temporary services.” Source: RevenueBase Database · checked Sep 26, 2026
7	Launchways	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	11-50	21 contacts →
	Indirect evidence “Simple, strategic solutions for Human Resources, Payroll, Employee Benefits, and Business Insurance.” Source: RevenueBase Database · checked Sep 26, 2026
8	Work Friendly	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	11-50	20 contacts →
	Indirect evidence “Work Friendly is the people infrastructure platform for growing companies.” Source: RevenueBase Database · checked Sep 26, 2026
9	Katalyst Group	Partial evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	11-50	13 contacts →
	Partial evidence “Katalyst Group is a boutique executive search and project resources firm specializing in the representation of corporate finance, accounting, and human resources professionals.” Source: RevenueBase Database · checked Sep 26, 2026
10	Global IQ	Partial evidence	Chicago, United StatesHQ checked Sep 26, 2026	11-50	10 contacts →
	Partial evidence “Global Data \| Global Insights Global IQ is a full suite data-as-a-service provider to meet your HR needs as well as analytics to help you plan for the future and consulting to…” Source: RevenueBase Database · checked Sep 26, 2026
11	Crucial Hire	Partial evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	11-50	10 contacts →
	Partial evidence “We are experts in the placement of Human Resources professionals, providing contract, contingency and retained services to start-ups, growth companies, and the Fortune We have a…” Source: RevenueBase Database · checked Sep 26, 2026
12	Vantage Solutions LLC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	1-10	9 contacts →
	Indirect evidence “At Vantage Solutions, we believe that business success is driven by people.” Source: RevenueBase Database · checked Sep 26, 2026
13	Evolvehr	Partial evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	11-50	8 contacts →
	Partial evidence “Founded in 2006, EvolveHR partners with US companies to support their HR needs and drive their people growth.” Source: RevenueBase Database · checked Sep 26, 2026
14	RTR HR And Staffing Services, LLC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	1-10	8 contacts →
	Partial evidence “RTR HR and Staffing Services, LLC connects clients to a strong HR and Staffing team.” Source: RevenueBase Database · checked Sep 26, 2026
15	HR PRO	Partial evidence	Chicago, United StatesHQ checked Sep 26, 2026	1-10	8 contacts →
	Partial evidence “Implementing the highest caliber integrity based human resources solutions and support, to drive top tier business outcomes, by a network of best in class hr pro’s, without the…” Source: RevenueBase Database · checked Sep 26, 2026
16	Marketstaff INC	Indirect evidence	Chicago, United StatesHQ checked Sep 26, 2026	1-10	7 contacts →
	Indirect evidence “Marketstaff, Inc.” Source: RevenueBase Database · checked Sep 26, 2026
17	Northstone INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	1-10	6 contacts →
	Indirect evidence “Northstone is premier relationship centered human capital consulting firm headquartered in Chicago with offices in Chicago & Milwaukee.” Source: RevenueBase Database · checked Sep 26, 2026
18	JMS HR Group	Partial evidence	Chicago, United StatesHQ checked Sep 26, 2026	1-10	6 contacts →
	Partial evidence “Pragmatic HR Advisory Services for Immediate Results.” Source: RevenueBase Database · checked Sep 26, 2026
19	HRC Advanced	Partial evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	1-10	5 contacts →
	Partial evidence “We offer a full range of customized HR services designed to alleviate the burden of HR on business resources while partnering with clients to drive business performance through…” Source: RevenueBase Database · checked Sep 26, 2026
20	Sirius Human Capital Company	Partial evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	11-50	5 contacts →
	Partial evidence “We provide our clients with direct hire recruitment, HR consulting, and strategic talent acquisition HR services to help you navigate through a turbulent candidate driven market.” Source: RevenueBase Database · checked Sep 26, 2026
21	Canary HR Consulting	Strong evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	1-10	4 contacts →
	Strong evidence “We are a boutique HR Consulting firm that is committed to providing professional and creative HR support.” Source: RevenueBase Database · checked Sep 26, 2026
22	Cognos HR	Strong evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	11-50	4 contacts →
	Strong evidence “We're a Human Resources services and consulting firm that specializes in serving startups, SMBs and non-profit organizations; whether it's payroll, employee benefits, HR software…” Source: RevenueBase Database · checked Sep 26, 2026
23	TA Resources LLC	Indirect evidence	Chicago, United StatesHQ checked Sep 26, 2026	1-10	3 contacts →
	Indirect evidence “At TA Resources, we recognize the challenge Small Businesses face when staffing and retaining talent, and we know the most important driver of success for any business is its…” Source: RevenueBase Database · checked Sep 26, 2026
24	V Elizabeth Talent Acquisition Solutions	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	11-50	3 contacts →
	Indirect evidence “V Elizabeth Talent Acquisition Solutions is a diversity retained executive search firm headquartered in Gary, IN and Chicago, IL.” Source: RevenueBase Database · checked Sep 26, 2026
25	Preston Hunter INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 26, 2026	1-10	3 contacts →
	Indirect evidence “Preston Hunter, Inc.” Source: RevenueBase Database · checked Sep 26, 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: HR software professional services. 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 HR software professional services.
Partial evidence: Its own public description names part of HR software professional services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name HR software professional services. 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 107 HR software professional services based in Chicago, United States

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HR software professional services based in Chicago, United States at a glance

As of Sep 26, 2026

43.9%Verified-email coverage

15.3Average contacts per company

1-10Median size (employees)

217.8%Largest-city concentration · New York

Sep 26, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for Chicago, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 107 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 HR software professional services, 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 Chicago, United States whose own description of what they do matches “HR software professional services”. 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 HR software professional services), 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 HR software professional services, and records with no verified work email. Companies headquartered outside Chicago 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, 717 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 26, 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.

HR software professional services by metro in the United States

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 HR software professional services, 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 HR software professional services are there based in Chicago, United States?

RevenueBase identified 107 HR software professional services headquartered in Chicago, 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?

Topbloc, headquartered in Chicago, tops this list with the largest team on record.

Which city has the most HR software professional services?

New York leads with 233 headquartered companies, followed by Atlanta (175) and Houston (114).

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 717 verified decision-maker contacts tracked across these 107 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 26, 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.