Company lists · Data refreshed September 2026
Top 10 Security and access control companies based in Chicago, United States
RevenueBase identified 37 security and access control companies headquartered in Chicago, United States as of September 2026 and tracks 1,421 professional contacts across them, including 252 with verified work emails. New York is the largest hub.
This list covers security and access control companies 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, how directly it supports the match, and when it was last checked. Data refreshed September 6, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 10 largest security and access control companies based in Chicago, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,138 | ||||
“At Titan Security Group, we understand that each client is unique, with specific security needs shaped by the type of property and its location.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 61 | ||||
“Prudential Defense Solutions is a full‑service security provider offering professional guard services, door staff, and government‑contractor.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | 18 | ||||
“Halo Security Group is a Chicago-based professional security services company providing comprehensive and reliable protection for businesses, residential communities, and…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | 14 | ||||
“Founded out of Sound Specialists and bringing over 30 years of client success and systems integration expertise to the commercial market, our mission is to bring white-glove…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | Skynet Security SystemsPartial evidence | 11 | |||
“SkyNet Security Systems was founded by a group of highly experienced and innovative security professionals who care about their clients.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | Vintech Systems INCPartial evidence | 9 | |||
“Established in 2006, VinTech is a Chicago-based, full-service, electronic security solutions provider.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | 7 | ||||
“Full Service Security Provider, Alarm Response, Patrol, Armed Security, Unarmed Security, Off Duty Police, Alarm Installation and Monitoring, CCTV Cameras, Access Control.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | RigilityIndirect evidence | 4 | |||
“At Rigility, We install, maintain, and repair commercial surveillance camera systems nationwide ranging from 4K surveillance cameras for small businesses to enterprise-grade…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | 3 | ||||
“We sell, install & service electronic equipment for commercial, residential and industrial.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | Chicago Building Services, INCIndirect evidence | 1 | |||
Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 10 of 37 security and access control companies based in Chicago, United States
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Security and access control companies based in Chicago, United States at a glance
As of Sep 6, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 37 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 security and access control companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “security and access control companies”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among security and access control companies, 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 an evidence 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, 252 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 6, 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.
Security and access control companies by metro in the United States
- Security and access control companies in New York112
- Security and access control companies in Houston109
- Security and access control companies in Miami74
- Security and access control companies in Los Angeles71
- Security and access control companies in Dallas63
- Security and access control companies in Atlanta49
- Security and access control companies in Phoenix45
- Security and access control companies in Austin38
- Security and access control companies in Las Vegas38
- Security and access control companies in Chicago37
- Security and access control companies in Indianapolis37
- Security and access control companies in Tampa33
- Security and access control companies in Charlotte31
- Security and access control companies in San Antonio31
- Security and access control companies in Brooklyn30
- Security and access control companies in Denver27
- Security and access control companies in Jacksonville27
- Security and access control companies in San Diego27
- Security and access control companies in Orlando25
- Security and access control companies in San Jose25
Frequently asked
How many security and access control companies are there based in Chicago, United States?
RevenueBase identified 37 security and access control companies 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?
Titan Security Group, headquartered in Chicago, tops this list with the largest team on record.
Which city has the most security and access control companies?
New York leads with 112 headquartered companies, followed by Houston (109) and Miami (74).
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 252 verified decision-maker contacts tracked across these 37 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 6, 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 SmartSearch, 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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