Company lists · Data verified August 2026

Top 25 List building services based in Chicago, United States

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 218 companies tracked

There are 218 list building services headquartered in Chicago, United States (RevenueBase, August 2026). RevenueBase tracks 4,287 professional contacts across them, including 2,426 with verified work emails and 2,111 with mobile numbers. New York is the largest hub.

This list covers list building 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. Data current as of August 28, 2026.

218Companies

4,287Contacts tracked

2,426Verified emails

2,111Mobile numbers

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The 25 largest list building services based in Chicago, United States

Ranked by team size

Top 25 of 218 list building services based in Chicago, United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Clayco	Chicago, IL	1,001-5,000	1,725	1,239
2	Bulley & Andrews	Chicago, IL	201-500	334	194
	RevenueBasePublisher of this directory	Boston, MA	n/a	n/a	Try free
3	Newground	Chicago, IL	51-200	260	161
4	Mchugh Construction	Chicago, IL	51-200	228	66
5	Sheehan Nagle Hartray Architects, A Woolpert Company	Chicago, IL	51-200	153	62
6	Reed Construction	Chicago, IL	51-200	125	59
7	The Concord Group	Chicago, IL	51-200	102	71
8	Hartshorne Plunkard Architecture	Chicago, IL	51-200	69	49
9	J.C. Anderson	Chicago, IL	51-200	69	26
10	Partners By Design	Chicago, IL	51-200	63	37
11	Fitzgerald	Chicago, IL	11-50	56	30
12	Synergy Construction Group, LLC	Chicago, IL	11-50	41	13
13	Studio GC Architecture Interiors	Chicago, IL	11-50	39	32
14	STR Partners LLC	Chicago, IL	11-50	37	34
15	Wright Heerema Architects	Chicago, IL	11-50	29	21
16	WMA Consulting Engineers	Chicago, IL	51-200	23	4
17	Zimmerman Weintraub Associates LLC	Chicago, IL	11-50	22	16
18	O'kelly Kasprak Architecture And Design	Chicago, IL	11-50	19	11
19	Senga Architects INC	Chicago, IL	11-50	18	10
20	Studio Arq, LLC	Chicago, IL	11-50	16	8
21	MEPIS	Chicago, IL	11-50	14	10
22	Environs Development, INC	Chicago, IL	11-50	14	10
23	EN Masse Architecture And Design	Chicago, IL	11-50	12	8
24	Hbra Architects, INC	Chicago, IL	11-50	12	3
25	Bldg Projects	Chicago, IL	11-50	11	8

Showing 25 of 218 list building services based in Chicago, United States

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List building services based in Chicago, United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 626 HQs

2,111Contacts with mobile numbers

14Emails re-verified in last 30 days

Companies by employee count

1-10

126

11-50

51-200

201-500

1,001-5,000

List building services by metro in the United States

Metro	Companies
List building services in New York	626
List building services in Houston	288
List building services in Los Angeles	236
List building services in Chicago	218
List building services in Miami	200
List building services in Austin	187
List building services in Dallas	178
List building services in Atlanta	167

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “list building services”, with match quality audited by blind human judging, and headquartered in Chicago, United States.
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: Contact records re-verify on a rolling cadence; 14 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many list building services are there based in Chicago, United States?

There are 218 list building services headquartered in Chicago, United States as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most list building services?

New York leads with 626 headquartered companies, followed by Houston (288) and Los Angeles (236).

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 2,426 verified decision-maker contacts tracked across these 218 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.