Company lists · Data refreshed September 2026
Top 25 Vessel security companies based in the United States
RevenueBase identified 99 vessel security companies headquartered in the United States as of September 2026 and tracks 2,484 professional contacts across them, including 248 with verified work emails and 716 with mobile numbers. San Diego is the largest hub.
This list covers vessel security companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 14, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest vessel security companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 484 contacts → | ||||
Partial evidence “American Guard Services is an established, reliable and accredited security protection firm.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 2 | 275 contacts → | ||||
Partial evidence “Welcome to Doyle Security Services (DSS) where a team of responsive security professionals stands ready to meet your needs in this ever-changing business environment.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 3 | 191 contacts → | ||||
Partial evidence “Top Guard Security provides uniformed unarmed and armed private security officer services and believes in a balanced approach to private security services management.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 4 | 118 contacts → | ||||
Partial evidence “MPS Security, a division of National Business Investigations, Inc.(NBI), is a full-service security firm providing Executive Protection and Residential Security Team protection.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 5 | 113 contacts → | ||||
Partial evidence “ISS Action has been at the vanguard of the security services since it opened its doors in 1991.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 6 | 103 contacts → | ||||
Partial evidence “TSS is a private security firm specializing in customer service, partnership focused cruise terminal, cargo facility and port authority security services, as well as crew…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 7 | 96 contacts → | ||||
Partial evidence “OUR MISSION The goal of Premier Security Solutions is to deflect and deter unlawful activity, create a safe environment for your campus, corporation, agricultural site, private…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 8 | 80 contacts → | ||||
Partial evidence “DPS Certificate of Private Security License Number B00257 Whether you own or operate a business, securing and protecting your assets against theft and vandalism is a vital part of…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 9 | 72 contacts → | ||||
Partial evidence “Execushield Inc, headquartered in California, provides professional security services to both American and international clients.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 10 | 65 contacts → | ||||
Partial evidence “Maritime Security Services.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 11 | 40 contacts → | ||||
Partial evidence “Six Maritime is a service disabled, veteran-owned maritime security and training company specializing in advanced waterfront protection, autonomous systems integration, and…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 12 | 40 contacts → | ||||
Partial evidence “We provide security management & risk mitigation services for businesses.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 13 | 35 contacts → | ||||
Indirect evidence “Westar Marine Services has been catering to the San Francisco Maritime Community since it was founded in 1976.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 14 | 35 contacts → | ||||
Partial evidence “Pinnacle Security & Investigation Inc.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 15 | 31 contacts → | ||||
Partial evidence “ESPADA is a proven international security and logistics company that provides superior service in all types of environments.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 16 | 22 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 17 | 19 contacts → | ||||
Partial evidence “Palmetto Yacht Management (PYM) delivers white-glove vessel transportation supported by a full-service concierge model designed for high-value clients, dealers, and OEM partners.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 18 | 18 contacts → | ||||
Partial evidence “Halo Security Group is a Chicago-based professional security services company providing comprehensive and reliable protection for businesses, residential communities, and…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 19 | 16 contacts → | ||||
Indirect evidence “In 2009, Meridian.us was formed to provide a cost-effective solution to combating piracy.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 20 | 16 contacts → | ||||
Strong evidence “Since March of 2011, Seaguard Security LLC (SGS) has specialized in providing affordable armed security solutions for vessels operating in high-risk waters including the Gulf of…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 21 | 14 contacts → | ||||
Partial evidence “Personal Protective Services Inc is a security and investigations company based out of Oakland, California.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 22 | 13 contacts → | ||||
Indirect evidence “OUR COMMITMENT TO OUR CUSTOMERS Seamar aspires to deliver a safe and efficient marine service to our customers, year in and year out.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 23 | 9 contacts → | ||||
Partial evidence “BlackStone Security Group is a veteran- and minority-owned security firm founded in 2018, proudly certified as a Service-Disabled Veteran-Owned Small Business (SDVOSB) and…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 24 | 8 contacts → | ||||
Partial evidence “We offer a wide range of services including but not limited to: armed/unarmed guards, maritime escort & security services, rover patrols, and walkthroughs.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 25 | 8 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: vessel security companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names vessel security companies.
- Partial evidence
- Its own public description names part of vessel security companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name vessel security companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 99 vessel security companies based in the United States
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Vessel security companies based in the United States at a glance
As of Sep 14, 2026Companies by employee count
Freshness & accuracy
How recently the business emails were verified and the company information checked
Email last verified
Median 16.5dCompany record updated
Median 78.0dHow 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 vessel security companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “vessel security companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names vessel security companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among vessel security companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 248 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 14, 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.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names vessel security companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many vessel security companies are there based in the United States?
RevenueBase identified 99 vessel security companies headquartered in the 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?
American Guard Services, INC, headquartered in Gardena, tops this list with the largest team on record.
Which city has the most vessel security companies?
San Diego leads with 3 headquartered companies, followed by Baltimore (2) and Chicago (2).
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 248 verified decision-maker contacts tracked across these 99 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 14, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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