Company lists · Data refreshed September 2026
Top 8 Security firms based in Baltimore, United States
RevenueBase identified 35 company matches for security firms associated with Baltimore, United States as of September 2026 and tracks 479 professional contacts across them, including 36 with verified work emails. Across the United States, New York is the largest hub for this category (190 companies); Baltimore has 35.
This list covers company matches for security firms associated with Baltimore, 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 14, 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 8 largest security firms based in Baltimore, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 68 contacts → | ||||
Exact match “DMAC Security is a professional security services provider offering armed and unarmed guards, mobile patrol, fire watch, and surveillance solutions.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 2 | 53 contacts → | ||||
Exact match “ICS is a locally-owned, private security company providing trustworthy, proactive, hands-on protection services to people and businesses in Maryland, Virginia, and Washington, DC.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 3 | 12 contacts → | ||||
Exact match “At Easter's Lock & Security Solutions, we're dedicated to providing our customers with fast, dependable service at reasonable rates, just as we have since 1953.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 4 | 7 contacts → | ||||
Exact match “VDS offers the most advanced mobile security solutions on the market.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 5 | 5 contacts → | ||||
Exact match “American Blackbird is a group of highly experienced senior electronic security professionals.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 6 | 5 contacts → | ||||
Exact match “Mix and match devices from four categories: alarm sensors, security cameras, door/elevator/gate access, and visitor entry.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 7 | 3 contacts → | ||||
Exact match “On Site Police dba On Site Protection is full service security staffing company based out of Baltimore, Maryland since its founding in 2019.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase | |||||
| 8 | 1 contacts → | ||||
Exact match “Headquartered in Baltimore, Maryland and servicing the DC, Northern Virginia and Maryland areas, Alpha Cameras and Security is an independently owned and operated security system…” Recorded in the RevenueBase company graph · Sep 14, 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 “security firms”. 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 8 of 35 security firms based in Baltimore, United States
See the full list, filter by size, metro and specialty, and access 36 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Security firms based in Baltimore, United States at a glance
As of Sep 14, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for Baltimore, so it is reported there. Company counts and contact totals on this page are exact for Baltimore, over 35 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 Baltimore, United States whose business descriptions match “security firms” 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 36 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 14, 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.
Security firms by metro in the United States
- Security firms in New York190
- Security firms in Los Angeles168
- Security firms in Houston156
- Security firms in Miami125
- Security firms in Dallas85
- Security firms in Atlanta83
- Security firms in Chicago77
- Security firms in Phoenix71
- Security firms in Austin67
- Security firms in Las Vegas58
- Security firms in Charlotte49
- Security firms in Orlando49
- Security firms in Tampa47
- Security firms in Denver46
- Security firms in San Diego46
- Security firms in San Antonio42
- Security firms in San Francisco41
- Security firms in Indianapolis34
- Security firms in Jacksonville33
- Security firms in San Jose33
- Security firms in Seattle33
- Security firms in Fort Lauderdale32
- Security firms in Sacramento32
- Security firms in Washington32
- Security firms in Philadelphia27
- Security firms in Portland26
- Security firms in Beverly Hills25
- Security firms in Boston25
- Security firms in Memphis25
- Security firms in Raleigh25
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 “security firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many security firms are there based in Baltimore, United States?
RevenueBase identified 35 company matches for security firms associated with Baltimore, 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?
Dmac Security 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 security firms?
New York leads the United States with 190 company records, followed by Los Angeles (168) and Houston (156). Baltimore has 35.
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 36 professional contacts with verified work emails tracked across these 35 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 14, 2026.
Ready to reach these companies? Verified emails and direct dials for all 35 security firms based in Baltimore, United States. Start with a free account, no credit card.
Download this list →Related lists
Security firms by geography
- Security firms based in the United States
- Security firms based in the United Kingdom
- Security firms based in Brazil
- Security firms based in France
- Security firms based in Canada
- Security firms based in Germany
- Security firms based in Italy
- Security firms based in Australia
- Security firms based in the Netherlands
- Security firms based in South Africa
- Security firms based in Mexico
- Security firms based in Spain
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
Company intelligence · public preview
Top 8 security firms based in Baltimore, 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 35 matching company records for security firms based in Baltimore, United States, with 479 tracked contacts and 36 verified work emails.
This public preview shows 8 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 14, 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 8 security firms based in Baltimore, 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 |  Dmac Securitydmacsecurity.netHQ: Baltimore, MD, United StatesReported employees: 201-500 | Baltimore, MD, United States | 201-500 | Exact match | 68 contacts → |
“DMAC Security is a professional security services provider offering armed and unarmed guards, mobile patrol, fire watch, and surveillance solutions.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  ICS Security Servicesicsprotection.comHQ: Baltimore, MD, United StatesReported employees: 51-200 | Baltimore, MD, United States | 51-200 | Exact match | 53 contacts → |
“ICS is a locally-owned, private security company providing trustworthy, proactive, hands-on protection services to people and businesses in Maryland, Virginia, and Washington, DC.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Easter's Lock & Security Solutionseasterslock.comHQ: Baltimore, MD, United StatesReported employees: 11-50 | Baltimore, MD, United States | 11-50 | Exact match | 12 contacts → |
“At Easter's Lock & Security Solutions, we're dedicated to providing our customers with fast, dependable service at reasonable rates, just as we have since 1953.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Vision Detection Systems LLCvisiondetectionsystems.comHQ: Baltimore, MD, United StatesReported employees: 11-50 | Baltimore, MD, United States | 11-50 | Exact match | 7 contacts → |
“VDS offers the most advanced mobile security solutions on the market.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  American Blackbirdamblackbird.comHQ: Baltimore, MD, United StatesReported employees: 1-10 | Baltimore, MD, United States | 1-10 | Exact match | 5 contacts → |
“American Blackbird is a group of highly experienced senior electronic security professionals.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Saberin Securitysaberinsecurity.comHQ: Baltimore, MD, United StatesReported employees: 1-10 | Baltimore, MD, United States | 1-10 | Exact match | 5 contacts → |
“Mix and match devices from four categories: alarm sensors, security cameras, door/elevator/gate access, and visitor entry.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  On Site Policeonsitepolice.comHQ: Baltimore, MD, United StatesReported employees: 51-200 | Baltimore, MD, United States | 51-200 | Exact match | 3 contacts → |
“On Site Police dba On Site Protection is full service security staffing company based out of Baltimore, Maryland since its founding in 2019.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Alpha Cameras And Securityalphasecuritycameras.comHQ: Baltimore, MD, United StatesReported employees: 1-10 | Baltimore, MD, United States | 1-10 | Exact match | 1 contacts → |
“Headquartered in Baltimore, Maryland and servicing the DC, Northern Virginia and Maryland areas, Alpha Cameras and Security is an independently owned and operated security system…” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 8 of 35 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
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Security firms: dataset insights
September 14, 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
35 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 Baltimore, so it is reported there. Company counts and contact totals on this page are exact for Baltimore, over 35 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 14, 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 ↗
Security firms by metro in the United States
- Security firms in New York190
- Security firms in Los Angeles168
- Security firms in Houston156
- Security firms in Miami125
- Security firms in Dallas85
- Security firms in Atlanta83
- Security firms in Chicago77
- Security firms in Phoenix71
- Security firms in Austin67
- Security firms in Las Vegas58
- Security firms in Charlotte49
- Security firms in Orlando49
- Security firms in Tampa47
- Security firms in Denver46
- Security firms in San Diego46
- Security firms in San Antonio42
- Security firms in San Francisco41
- Security firms in Indianapolis34
- Security firms in Jacksonville33
- Security firms in San Jose33
- Security firms in Seattle33
- Security firms in Fort Lauderdale32
- Security firms in Sacramento32
- Security firms in Washington32
- Security firms in Philadelphia27
- Security firms in Portland26
- Security firms in Beverly Hills25
- Security firms in Boston25
- Security firms in Memphis25
- Security firms in Raleigh25
Questions about this company list
What does Exact match mean for security firms?
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 security firms did RevenueBase find based in Baltimore, United States?
The saved snapshot records 35 matching company records, 479 tracked contacts and 36 verified emails. The public preview displays 8 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 14, 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
Security firms by geography
- Security firms based in the United States
- Security firms based in the United Kingdom
- Security firms based in Brazil
- Security firms based in France
- Security firms based in Canada
- Security firms based in Germany
- Security firms based in Italy
- Security firms based in Australia
- Security firms based in the Netherlands
- Security firms based in South Africa
- Security firms based in Mexico
- Security firms based in Spain
Cite this list
RevenueBase Data Team. Top 8 security firms based in Baltimore, United States. Snapshot: September 14, 2026. https://revenuebase.ai/companies/security-firms/united-states/baltimore.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
Company intelligence · public preview
Top 8 security firms based in Baltimore, United States
RevenueBase records 35 matching company records for security firms based in Baltimore, United States, with 479 tracked contacts and 36 verified work emails.
This public preview shows 8 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 14, 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 8 security firms based in Baltimore, 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 | Dmac Securitydmacsecurity.net HQ: Baltimore, MD, United StatesReported employees: 201-500 | Baltimore, MD, United States | 201-500 | Exact match | 68 contacts → |
“DMAC Security is a professional security services provider offering armed and unarmed guards, mobile patrol, fire watch, and surveillance solutions.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | ICS Security Servicesicsprotection.com HQ: Baltimore, MD, United StatesReported employees: 51-200 | Baltimore, MD, United States | 51-200 | Exact match | 53 contacts → |
“ICS is a locally-owned, private security company providing trustworthy, proactive, hands-on protection services to people and businesses in Maryland, Virginia, and Washington, DC.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Easter's Lock & Security Solutionseasterslock.com HQ: Baltimore, MD, United StatesReported employees: 11-50 | Baltimore, MD, United States | 11-50 | Exact match | 12 contacts → |
“At Easter's Lock & Security Solutions, we're dedicated to providing our customers with fast, dependable service at reasonable rates, just as we have since 1953.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Vision Detection Systems LLCvisiondetectionsystems.com HQ: Baltimore, MD, United StatesReported employees: 11-50 | Baltimore, MD, United States | 11-50 | Exact match | 7 contacts → |
“VDS offers the most advanced mobile security solutions on the market.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | American Blackbirdamblackbird.com HQ: Baltimore, MD, United StatesReported employees: 1-10 | Baltimore, MD, United States | 1-10 | Exact match | 5 contacts → |
“American Blackbird is a group of highly experienced senior electronic security professionals.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Saberin Securitysaberinsecurity.com HQ: Baltimore, MD, United StatesReported employees: 1-10 | Baltimore, MD, United States | 1-10 | Exact match | 5 contacts → |
“Mix and match devices from four categories: alarm sensors, security cameras, door/elevator/gate access, and visitor entry.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | On Site Policeonsitepolice.com HQ: Baltimore, MD, United StatesReported employees: 51-200 | Baltimore, MD, United States | 51-200 | Exact match | 3 contacts → |
“On Site Police dba On Site Protection is full service security staffing company based out of Baltimore, Maryland since its founding in 2019.” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Alpha Cameras And Securityalphasecuritycameras.com HQ: Baltimore, MD, United StatesReported employees: 1-10 | Baltimore, MD, United States | 1-10 | Exact match | 1 contacts → |
“Headquartered in Baltimore, Maryland and servicing the DC, Northern Virginia and Maryland areas, Alpha Cameras and Security is an independently owned and operated security system…” Recorded description excerpt · September 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 8 of 35 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Security firms: dataset insights
September 14, 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
35 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 Baltimore, so it is reported there. Company counts and contact totals on this page are exact for Baltimore, over 35 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 14, 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 ↗
Security firms by metro in the United States
- Security firms in New York190
- Security firms in Los Angeles168
- Security firms in Houston156
- Security firms in Miami125
- Security firms in Dallas85
- Security firms in Atlanta83
- Security firms in Chicago77
- Security firms in Phoenix71
- Security firms in Austin67
- Security firms in Las Vegas58
- Security firms in Charlotte49
- Security firms in Orlando49
- Security firms in Tampa47
- Security firms in Denver46
- Security firms in San Diego46
- Security firms in San Antonio42
- Security firms in San Francisco41
- Security firms in Indianapolis34
- Security firms in Jacksonville33
- Security firms in San Jose33
- Security firms in Seattle33
- Security firms in Fort Lauderdale32
- Security firms in Sacramento32
- Security firms in Washington32
- Security firms in Philadelphia27
- Security firms in Portland26
- Security firms in Beverly Hills25
- Security firms in Boston25
- Security firms in Memphis25
- Security firms in Raleigh25
Questions about this company list
What does Exact match mean for security firms?
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 security firms did RevenueBase find based in Baltimore, United States?
The saved snapshot records 35 matching company records, 479 tracked contacts and 36 verified emails. The public preview displays 8 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 14, 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
Security firms by geography
- Security firms based in the United States
- Security firms based in the United Kingdom
- Security firms based in Brazil
- Security firms based in France
- Security firms based in Canada
- Security firms based in Germany
- Security firms based in Italy
- Security firms based in Australia
- Security firms based in the Netherlands
- Security firms based in South Africa
- Security firms based in Mexico
- Security firms based in Spain
Cite this list
RevenueBase Data Team. Top 8 security firms based in Baltimore, United States. Snapshot: September 14, 2026. https://revenuebase.ai/companies/security-firms/united-states/baltimore.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗