Company lists · Data refreshed September 2026
Top 24 IT security monitoring services based in Chicago, United States
RevenueBase identified 51 company matches for IT security monitoring services associated with Chicago, United States as of September 2026 and tracks 1,849 professional contacts across them, including 986 with verified work emails. Across the United States, New York is the largest hub for this category (89 companies); Chicago has 51.
This list covers company matches for IT security monitoring services associated with Chicago, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 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 24 largest IT security monitoring services based in Chicago, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 874 contacts → | ||||
Exact match “Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 2 | 628 contacts → | ||||
Exact match “VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 3 | 69 contacts → | ||||
Exact match “Experiencing a security incident?” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 4 | 32 contacts → | ||||
Exact match “We’ve moved!” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 5 | 27 contacts → | ||||
Exact match “In today’s digitally connected world, cyber security plays a crucial role.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 6 | 9 contacts → | ||||
Exact match “HTA Technology Security Consulting (HTA) is a certified Woman-Owned, Small, Disadvantaged, Minority business with offices in Chicago, IL, and the Washington DC corridor.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 7 | 9 contacts → | ||||
Exact match “Data Defenders is at the forefront of Managed Cybersecurity Operations Providers (MCOP), specializing in safeguarding municipalities through our exclusive Regional Security…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 8 | 8 contacts → | ||||
Exact match “DataGuard Cybersecurity Without The Complexity DataGuard uses state-of-the-art industry resources to implement a multi-layer defense for each client’s unique cyber security needs.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 9 | 7 contacts → | ||||
Exact match “At Cyber Bark, we bring 100 years of collective experience to the table, serving businesses across the US from our base in Illinois.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 10 | 7 contacts → | ||||
Exact match “Amol Solutions strives to be a leader in cybersecurity services for organizations of all sizes.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 11 | 6 contacts → | ||||
Exact match “Clairos is a cybersecurity company that helps organizations build stronger, more manageable security programs through a practical, tailored approach.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 12 | 6 contacts → | ||||
Exact match “Dedicated, Full Service IT Management.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 13 | 5 contacts → | ||||
Exact match “Welcome to Network Aegis!” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 14 | 4 contacts → | ||||
Exact match “Urbane Security is an information security firm that provides specially tailored security and compliance solutions that empower the Fortune 500 to securely focus on their ultimate…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 15 | 4 contacts → | ||||
Exact match “There's nothing like the peace of mind that comes from knowing someone has your back.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 16 | 4 contacts → | ||||
Exact match “Apex IT and Cybersecurity Solutions Inc is a leading Technology and Cybersecurity services firm based in Chicago, IL.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 17 | 4 contacts → | ||||
Exact match “CyberMetis has collected some of the industry’s best minds and tools.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 18 | 3 contacts → | ||||
Exact match “Red Door Technologies has protected Chicago small businesses since 2009.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 19 | 3 contacts → | ||||
Exact match “We provide seeded contacts for simple, effective data leak monitoring, partner vetting and process validation solutions.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 20 | 2 contacts → | ||||
Exact match “Founded 2019 in Chicago by a team with industry expertise, ProtectedIT is a Managed Security Services Provider delivering remote infrastructure management, cloud adoption…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 21 | 2 contacts → | ||||
Exact match “B Suite Cyber Security is a leader in minimizing cyber breach risk and demonstrating compliance for the financial industry.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 22 | 1 contacts → | ||||
Exact match “We stop ChatGPT from stealing your secrets.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 23 | 1 contacts → | ||||
Exact match “WallScott Solutions is the Ultimate Provider for Network and Data Security in Compliance Regulated industries for Consumer Protection.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 24 | 1 contacts → | ||||
Exact match “We offer a wide spectrum of comprehensive IT services tailored to meet the unique needs of your business.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “IT security monitoring services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 24 of 51 IT security monitoring services based in Chicago, United States
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IT security monitoring services 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 51 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- 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
- Company records associated with Chicago, United States whose business descriptions match “IT security monitoring services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- 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 displayed company carries at least one verified work email. RevenueBase tracks 986 professional contacts with verified work emails across the full matched dataset. 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.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
IT security monitoring services by metro in the United States
- IT security monitoring services in New York89
- IT security monitoring services in Miami62
- IT security monitoring services in Houston56
- IT security monitoring services in Austin51
- IT security monitoring services in San Francisco50
- IT security monitoring services in Dallas46
- IT security monitoring services in Atlanta35
- IT security monitoring services in Tampa33
- IT security monitoring services in Phoenix30
- IT security monitoring services in San Diego30
- IT security monitoring services in Los Angeles29
- IT security monitoring services in Las Vegas27
- IT security monitoring services in Charlotte26
- IT security monitoring services in Denver26
- IT security monitoring services in Washington26
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “IT security monitoring services”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many IT security monitoring services are there based in Chicago, United States?
RevenueBase identified 51 company matches for IT security monitoring services associated with Chicago, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Trustwave, A Levelblue Company tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city in the United States has the most IT security monitoring services?
New York leads the United States with 89 company records, followed by Miami (62) and Houston (56). Chicago has 51.
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 986 professional contacts with verified work emails tracked across these 51 companies; direct dials are available where recorded.
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.
Ready to reach these companies? Verified emails and direct dials for all 51 IT security monitoring services based in Chicago, United States. Start with a free account, no credit card.
Download this list →Related lists
IT security monitoring services by geography
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- IT security monitoring services based in Mississauga, Canada
- IT security monitoring services based in Montreal, Canada
- IT security monitoring services based in Ottawa, Canada
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- IT security monitoring services based in Ahmedabad, India
- IT security monitoring services based in Bangalore, India
- IT security monitoring services based in Chennai, India
- IT security monitoring services based in Hyderabad, India
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.
More company lists
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- Lists A-Z
- New lists
- IT security monitoring services based in Curitiba, Brazil
- IT security monitoring services based in Rio De Janeiro, Brazil
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Company intelligence · public preview
Top 24 IT security monitoring services based in Chicago, United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 51 matching company records for IT security monitoring services based in Chicago, United States, with 1,849 tracked contacts and 986 verified work emails.
This public preview shows 24 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 21, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 24 IT security monitoring services based in Chicago, United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Trustwave, A Levelblue Companylevelblue.comHQ: Chicago, IL, United StatesReported employees: 501-1,000 | Chicago, IL, United States | 501-1,000 | Exact match | 874 contacts → |
“Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Vikingcloudvikingcloud.comHQ: Chicago, IL, United StatesReported employees: 1,001-5,000 | Chicago, IL, United States | 1,001-5,000 | Exact match | 628 contacts → |
“VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Entaraentaracorp.com HQ: Chicago, IL, United StatesReported employees: 51-200 | Chicago, IL, United States | 51-200 | Exact match | 69 contacts → |
“Experiencing a security incident?” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Onshore Security A Cybermaxx Companyonshore.comHQ: Chicago, IL, United StatesReported employees: 51-200 | Chicago, IL, United States | 51-200 | Exact match | 32 contacts → |
“We’ve moved!” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Abira Securityabirasecurity.comHQ: Chicago, IL, United StatesReported employees: 51-200 | Chicago, IL, United States | 51-200 | Exact match | 27 contacts → |
“In today’s digitally connected world, cyber security plays a crucial role.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Harrington Technology & Associates, INChta-inc.comHQ: Chicago, IL, United StatesReported employees: 11-50 | Chicago, IL, United States | 11-50 | Exact match | 9 contacts → |
“HTA Technology Security Consulting (HTA) is a certified Woman-Owned, Small, Disadvantaged, Minority business with offices in Chicago, IL, and the Washington DC corridor.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Data Defenders, LLCdata-defenders.comHQ: Chicago, IL, United StatesReported employees: 11-50 | Chicago, IL, United States | 11-50 | Exact match | 9 contacts → |
“Data Defenders is at the forefront of Managed Cybersecurity Operations Providers (MCOP), specializing in safeguarding municipalities through our exclusive Regional Security…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Dataguarddata-guard365.comHQ: Chicago, IL, United StatesReported employees: 51-200 | Chicago, IL, United States | 51-200 | Exact match | 8 contacts → |
“DataGuard Cybersecurity Without The Complexity DataGuard uses state-of-the-art industry resources to implement a multi-layer defense for each client’s unique cyber security needs.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Cyber Bark LLCcyberbark.comHQ: Chicago, United StatesReported employees: 51-200 | Chicago, United States | 51-200 | Exact match | 7 contacts → |
“At Cyber Bark, we bring 100 years of collective experience to the table, serving businesses across the US from our base in Illinois.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Amol Solutionsamolsolutions.comHQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 7 contacts → |
“Amol Solutions strives to be a leader in cybersecurity services for organizations of all sizes.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Clairosclairos.comHQ: Chicago, IL, United StatesReported employees: 51-200 | Chicago, IL, United States | 51-200 | Exact match | 6 contacts → |
“Clairos is a cybersecurity company that helps organizations build stronger, more manageable security programs through a practical, tailored approach.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Mayflower Technologies LLCmayflowertech.comHQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 6 contacts → |
“Dedicated, Full Service IT Management.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Network Aegisnetworkaegis.netHQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 5 contacts → |
“Welcome to Network Aegis!” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Urbane Securityurbanesecurity.comHQ: Chicago, IL, United StatesReported employees: 11-50 | Chicago, IL, United States | 11-50 | Exact match | 4 contacts → |
“Urbane Security is an information security firm that provides specially tailored security and compliance solutions that empower the Fortune 500 to securely focus on their ultimate…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Technoir Security Solutionstechnoirsolutions.comHQ: Chicago, IL, United StatesReported employees: 11-50 | Chicago, IL, United States | 11-50 | Exact match | 4 contacts → |
“There's nothing like the peace of mind that comes from knowing someone has your back.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Apex IT And Cybersecurity Solutionsapexcybersecurity.orgHQ: Chicago, IL, United StatesReported employees: 51-200 | Chicago, IL, United States | 51-200 | Exact match | 4 contacts → |
“Apex IT and Cybersecurity Solutions Inc is a leading Technology and Cybersecurity services firm based in Chicago, IL.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Cybermetiscybermetis.ioHQ: Chicago, IL, United StatesReported employees: 11-50 | Chicago, IL, United States | 11-50 | Exact match | 4 contacts → |
“CyberMetis has collected some of the industry’s best minds and tools.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  RED Door Technologiesreddoortechnologies.comHQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 3 contacts → |
“Red Door Technologies has protected Chicago small businesses since 2009.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Assumedassumed.comHQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 3 contacts → |
“We provide seeded contacts for simple, effective data leak monitoring, partner vetting and process validation solutions.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Protecteditprotectedit.netHQ: Chicago, IL, United StatesReported employees: 201-500 | Chicago, IL, United States | 201-500 | Exact match | 2 contacts → |
“Founded 2019 in Chicago by a team with industry expertise, ProtectedIT is a Managed Security Services Provider delivering remote infrastructure management, cloud adoption…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  B Suite Cyber Securitybsuite.ioHQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 2 contacts → |
“B Suite Cyber Security is a leader in minimizing cyber breach risk and demonstrating compliance for the financial industry.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Secureslicesecureslice.com HQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 1 contacts → |
“We stop ChatGPT from stealing your secrets.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Wallscott Solutionswallscottsolutions.comHQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 1 contacts → |
“WallScott Solutions is the Ultimate Provider for Network and Data Security in Compliance Regulated industries for Consumer Protection.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Gradient Solutionsgradient-solutions.comHQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 1 contacts → |
“We offer a wide spectrum of comprehensive IT services tailored to meet the unique needs of your business.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 24 of 51 company matches
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IT security monitoring services: dataset insights
September 21, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
51 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 51 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 21, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
IT security monitoring services by metro in the United States
- IT security monitoring services in New York89
- IT security monitoring services in Miami62
- IT security monitoring services in Houston56
- IT security monitoring services in Austin51
- IT security monitoring services in San Francisco50
- IT security monitoring services in Dallas46
- IT security monitoring services in Atlanta35
- IT security monitoring services in Tampa33
- IT security monitoring services in Phoenix30
- IT security monitoring services in San Diego30
- IT security monitoring services in Los Angeles29
- IT security monitoring services in Las Vegas27
- IT security monitoring services in Charlotte26
- IT security monitoring services in Denver26
- IT security monitoring services in Washington26
Questions about this company list
What does Exact match mean for IT security monitoring services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many IT security monitoring services did RevenueBase find based in Chicago, United States?
The saved snapshot records 51 matching company records, 1,849 tracked contacts and 986 verified emails. The public preview displays 24 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 21, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
IT security monitoring services by geography
- IT security monitoring services based in Curitiba, Brazil
- IT security monitoring services based in Rio De Janeiro, Brazil
- IT security monitoring services based in Sao Paulo, Brazil
- IT security monitoring services based in Calgary, Canada
- IT security monitoring services based in Mississauga, Canada
- IT security monitoring services based in Montreal, Canada
- IT security monitoring services based in Ottawa, Canada
- IT security monitoring services based in Toronto, Canada
- IT security monitoring services based in Ahmedabad, India
- IT security monitoring services based in Bangalore, India
- IT security monitoring services based in Chennai, India
- IT security monitoring services based in Hyderabad, India
Cite this list
RevenueBase Data Team. Top 24 IT security monitoring services based in Chicago, United States. Snapshot: September 21, 2026. https://revenuebase.ai/companies/it-security-monitoring-services/united-states/chicago.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
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- New lists
- IT security monitoring services based in Curitiba, Brazil
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Company intelligence · public preview
Top 24 IT security monitoring services based in Chicago, United States
RevenueBase records 51 matching company records for IT security monitoring services based in Chicago, United States, with 1,849 tracked contacts and 986 verified work emails.
This public preview shows 24 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 21, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 24 IT security monitoring services based in Chicago, United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Trustwave, A Levelblue Companylevelblue.com HQ: Chicago, IL, United StatesReported employees: 501-1,000 | Chicago, IL, United States | 501-1,000 | Exact match | 874 contacts → |
“Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Vikingcloudvikingcloud.com HQ: Chicago, IL, United StatesReported employees: 1,001-5,000 | Chicago, IL, United States | 1,001-5,000 | Exact match | 628 contacts → |
“VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Entaraentaracorp.com HQ: Chicago, IL, United StatesReported employees: 51-200 | Chicago, IL, United States | 51-200 | Exact match | 69 contacts → |
“Experiencing a security incident?” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Onshore Security A Cybermaxx Companyonshore.com HQ: Chicago, IL, United StatesReported employees: 51-200 | Chicago, IL, United States | 51-200 | Exact match | 32 contacts → |
“We’ve moved!” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Abira Securityabirasecurity.com HQ: Chicago, IL, United StatesReported employees: 51-200 | Chicago, IL, United States | 51-200 | Exact match | 27 contacts → |
“In today’s digitally connected world, cyber security plays a crucial role.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Harrington Technology & Associates, INChta-inc.com HQ: Chicago, IL, United StatesReported employees: 11-50 | Chicago, IL, United States | 11-50 | Exact match | 9 contacts → |
“HTA Technology Security Consulting (HTA) is a certified Woman-Owned, Small, Disadvantaged, Minority business with offices in Chicago, IL, and the Washington DC corridor.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Data Defenders, LLCdata-defenders.com HQ: Chicago, IL, United StatesReported employees: 11-50 | Chicago, IL, United States | 11-50 | Exact match | 9 contacts → |
“Data Defenders is at the forefront of Managed Cybersecurity Operations Providers (MCOP), specializing in safeguarding municipalities through our exclusive Regional Security…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Dataguarddata-guard365.com HQ: Chicago, IL, United StatesReported employees: 51-200 | Chicago, IL, United States | 51-200 | Exact match | 8 contacts → |
“DataGuard Cybersecurity Without The Complexity DataGuard uses state-of-the-art industry resources to implement a multi-layer defense for each client’s unique cyber security needs.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Cyber Bark LLCcyberbark.com HQ: Chicago, United StatesReported employees: 51-200 | Chicago, United States | 51-200 | Exact match | 7 contacts → |
“At Cyber Bark, we bring 100 years of collective experience to the table, serving businesses across the US from our base in Illinois.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Amol Solutionsamolsolutions.com HQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 7 contacts → |
“Amol Solutions strives to be a leader in cybersecurity services for organizations of all sizes.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Clairosclairos.com HQ: Chicago, IL, United StatesReported employees: 51-200 | Chicago, IL, United States | 51-200 | Exact match | 6 contacts → |
“Clairos is a cybersecurity company that helps organizations build stronger, more manageable security programs through a practical, tailored approach.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Mayflower Technologies LLCmayflowertech.com HQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 6 contacts → |
“Dedicated, Full Service IT Management.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Network Aegisnetworkaegis.net HQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 5 contacts → |
“Welcome to Network Aegis!” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Urbane Securityurbanesecurity.com HQ: Chicago, IL, United StatesReported employees: 11-50 | Chicago, IL, United States | 11-50 | Exact match | 4 contacts → |
“Urbane Security is an information security firm that provides specially tailored security and compliance solutions that empower the Fortune 500 to securely focus on their ultimate…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Technoir Security Solutionstechnoirsolutions.com HQ: Chicago, IL, United StatesReported employees: 11-50 | Chicago, IL, United States | 11-50 | Exact match | 4 contacts → |
“There's nothing like the peace of mind that comes from knowing someone has your back.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Apex IT And Cybersecurity Solutionsapexcybersecurity.org HQ: Chicago, IL, United StatesReported employees: 51-200 | Chicago, IL, United States | 51-200 | Exact match | 4 contacts → |
“Apex IT and Cybersecurity Solutions Inc is a leading Technology and Cybersecurity services firm based in Chicago, IL.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Cybermetiscybermetis.io HQ: Chicago, IL, United StatesReported employees: 11-50 | Chicago, IL, United States | 11-50 | Exact match | 4 contacts → |
“CyberMetis has collected some of the industry’s best minds and tools.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | RED Door Technologiesreddoortechnologies.com HQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 3 contacts → |
“Red Door Technologies has protected Chicago small businesses since 2009.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Assumedassumed.com HQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 3 contacts → |
“We provide seeded contacts for simple, effective data leak monitoring, partner vetting and process validation solutions.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Protecteditprotectedit.net HQ: Chicago, IL, United StatesReported employees: 201-500 | Chicago, IL, United States | 201-500 | Exact match | 2 contacts → |
“Founded 2019 in Chicago by a team with industry expertise, ProtectedIT is a Managed Security Services Provider delivering remote infrastructure management, cloud adoption…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | B Suite Cyber Securitybsuite.io HQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 2 contacts → |
“B Suite Cyber Security is a leader in minimizing cyber breach risk and demonstrating compliance for the financial industry.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Secureslicesecureslice.com HQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 1 contacts → |
“We stop ChatGPT from stealing your secrets.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Wallscott Solutionswallscottsolutions.com HQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 1 contacts → |
“WallScott Solutions is the Ultimate Provider for Network and Data Security in Compliance Regulated industries for Consumer Protection.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Gradient Solutionsgradient-solutions.com HQ: Chicago, IL, United StatesReported employees: 1-10 | Chicago, IL, United States | 1-10 | Exact match | 1 contacts → |
“We offer a wide spectrum of comprehensive IT services tailored to meet the unique needs of your business.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 24 of 51 company matches
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IT security monitoring services: dataset insights
September 21, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
51 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 51 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 21, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
IT security monitoring services by metro in the United States
- IT security monitoring services in New York89
- IT security monitoring services in Miami62
- IT security monitoring services in Houston56
- IT security monitoring services in Austin51
- IT security monitoring services in San Francisco50
- IT security monitoring services in Dallas46
- IT security monitoring services in Atlanta35
- IT security monitoring services in Tampa33
- IT security monitoring services in Phoenix30
- IT security monitoring services in San Diego30
- IT security monitoring services in Los Angeles29
- IT security monitoring services in Las Vegas27
- IT security monitoring services in Charlotte26
- IT security monitoring services in Denver26
- IT security monitoring services in Washington26
Questions about this company list
What does Exact match mean for IT security monitoring services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many IT security monitoring services did RevenueBase find based in Chicago, United States?
The saved snapshot records 51 matching company records, 1,849 tracked contacts and 986 verified emails. The public preview displays 24 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 21, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 24 IT security monitoring services based in Chicago, United States. Snapshot: September 21, 2026. https://revenuebase.ai/companies/it-security-monitoring-services/united-states/chicago.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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