Company lists · Data refreshed September 2026
Top 25 HR systems based in Chicago, United States
RevenueBase identified 83 HR systems headquartered in Chicago, United States as of September 2026 and tracks 7,732 professional contacts across them, including 2,406 with verified work emails. New York is the largest hub.
This list covers HR systems 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 21, 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.
The 25 largest HR systems based in Chicago, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 7,413 contacts → | ||||
Indirect evidence “The City of Chicago is the third largest city in the United States, with a population of nearly three million people.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 34 contacts → | ||||
Indirect evidence “RJ Reliance is the leading client-focused Human Capital Management solution and service partner.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 24 contacts → | ||||
Indirect evidence “Arlington Resources specializes in the placement of Human Resources Professionals for direct hire, contract and temporary services.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 10 contacts → | ||||
Indirect 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 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 9 contacts → | ||||
Indirect evidence “At Vantage Solutions, we believe that business success is driven by people.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 8 contacts → | ||||
Partial evidence “RTR HR and Staffing Services, LLC connects clients to a strong HR and Staffing team.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 7 contacts → | ||||
Indirect evidence “Marketstaff, Inc.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 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 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 6 contacts → | ||||
Partial evidence “Pragmatic HR Advisory Services for Immediate Results.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 4 contacts → | ||||
Partial evidence “We are a boutique HR Consulting firm that is committed to providing professional and creative HR support.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 4 contacts → | ||||
Partial 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 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 3 contacts → | ||||
Indirect evidence “Most small and midsize businesses are told they have two choices: hand everything over to a PEO and lose their identity, or settle for a payroll vendor that doesn’t actually solve…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 3 contacts → | ||||
Indirect evidence “We help start-ups and small growing organizations maneuver through the challenging world of Human Resources by focusing on the engagement of the employees, minimizing company…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 2 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 1 contacts → | ||||
Indirect evidence “I focus my work with small to midsize companies and start-ups across a wide range of industries-from automotive and medical to marketing, manufacturing, education, and apparel.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 1 contacts → | ||||
Partial evidence “At 22 North HR, we help leaders navigate the most emotionally complex, high-stakes chapters of business by delivering executive-level HR services, leadership development, and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 1 contacts → | ||||
Partial evidence “Strategic HR advisory and interim support for organizations navigating growth and change.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1 contacts → | ||||
Partial evidence “Strategic HR partner to companies up to employees.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 contacts → | ||||
Partial evidence “People Core Strategies provides HR consulting and advisory services to organizations looking to drive business results by optimizing the capability of their people and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 contacts → | ||||
Partial evidence “We help growing startups rethink the meaning of “HR” and the role it plays within their business.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
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 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 HR systems.
- Partial evidence
- Its own public description names part of HR systems, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name HR 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 83 HR systems based in Chicago, United States
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HR systems based in Chicago, United States at a glance
As of Sep 21, 2026Companies by employee count
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 83 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 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 Chicago, United States whose own description of what they do matches “HR 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 HR 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 HR systems, 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, 2,406 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 21, 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 systems by metro in the United States
- HR systems in New York180
- HR systems in Atlanta135
- HR systems in Los Angeles92
- HR systems in Houston87
- HR systems in Chicago83
- HR systems in Dallas70
- HR systems in Miami65
- HR systems in Austin64
- HR systems in Denver61
- HR systems in San Francisco61
- HR systems in Charlotte56
- HR systems in Boston50
- HR systems in San Diego48
- HR systems in Phoenix47
- HR systems in Washington43
- HR systems in Tampa41
- HR systems in Philadelphia39
- HR systems in Orlando35
- HR systems in Columbus31
- HR systems in Portland31
- HR systems in Raleigh29
- HR systems in Irvine28
- HR systems in Seattle28
- HR systems in Minneapolis27
- HR systems in Nashville27
- HR systems in San Jose26
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 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 HR systems are there based in Chicago, United States?
RevenueBase identified 83 HR systems 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?
City Of Chicago, headquartered in Chicago, tops this list with the largest team on record.
Which city has the most HR systems?
New York leads with 180 headquartered companies, followed by Atlanta (135) and Los Angeles (92).
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 2,406 verified decision-maker contacts tracked across these 83 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 21, 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.
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