Company lists · Data refreshed September 2026
Top 25 Maritime security compliance firms based in the United States
RevenueBase identified 208 maritime security compliance firms headquartered in the United States as of September 2026 and tracks 2,426 professional contacts across them, including 545 with verified work emails. Houston is the largest hub.
This list covers maritime security compliance firms 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 28, 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 maritime security compliance firms 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 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 125 contacts → | ||||
Partial evidence “ABS Wavesight™ is a maritime software-as-a-service (SaaS) company, built on the foundation of ABS, one of the world's leading ship classification organizations with a 160+ year…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 112 contacts → | ||||
Indirect evidence “Established in 1993, the International Register of Shipping (INTLREG) is an independent classification society working with the objective of safeguarding life, property and the…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 89 contacts → | ||||
Indirect evidence “NCB is an independent, not-for-profit organization dedicated to safeguarding life and cargo through safer, smarter supply chains.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 84 contacts → | ||||
Partial evidence “BSI Consulting offers comprehensive world-class solutions in environmental, health, safety (EHS), supply chain security, and sustainability.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 65 contacts → | ||||
Strong evidence “Maritime Security Services.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 49 contacts → | ||||
Partial evidence “Gallagher Marine Systems (GMS) is the industry’s most comprehensive source of full-service, in-depth, compliance support.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 45 contacts → | ||||
Partial evidence “ERGONAV GROUP is an International privately-owned Corporation active in the Maritime Sector, focusing on Environmental Testing & Inspections.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 45 contacts → | ||||
Partial evidence “TBS Safety is your trusted partner in building safer, stronger operations across the maritime industry and beyond.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 41 contacts → | ||||
Partial evidence “Since 1968, Sabine Surveyors has provided the maritime industry with a wide array of services through our highly trained, educated, competent, and dedicated staff of marine…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 40 contacts → | ||||
Strong 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 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 35 contacts → | ||||
Partial evidence “Westar Marine Services has been catering to the San Francisco Maritime Community since it was founded in 1976.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 31 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 31 contacts → | ||||
Indirect evidence “Fathom Resources (Fathom), is a marine service provider established in 2002 with offices located in New Bedford, Massachusetts and Middletown, Rhode Island.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 30 contacts → | ||||
Partial evidence “Offshore Technical Compliance is rapidly positioning itself as the global offshore industry’s leader in supplying compliance-related services.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 28 contacts → | ||||
Indirect evidence “DLS Marine is a worldwide marine surveying firm that has served the industry for over 50 years with offices in New Orleans, Houston, Tampa and Norfolk.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 22 contacts → | ||||
Partial evidence “Global Trade & Security Solutions Excellence in the Public & Private Sector A proud V3-certified company ISOA Women, Peace, and Security Certified Company Since 1993, the experts…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 20 contacts → | ||||
Partial evidence “Founded in 1983, Maritime Professional Training (MPT) is the largest private maritime training school in the United States, serving more than students per year, providing training…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 19 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 16 contacts → | ||||
Indirect evidence “In 2009, Meridian.us was formed to provide a cost-effective solution to combating piracy.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 16 contacts → | ||||
Partial 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 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 15 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 13 contacts → | ||||
Partial evidence “MM-SEAS is a team of nearly 30 maritime professionals, credentialing specialists, and engineers working to make USCG licensing something no mariner, office team, or instructor has…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 13 contacts → | ||||
Partial evidence “CRS Class is a marine classification society promoting safer shipping and cleaner seas through state-of-the-art technology and expert classification services, focusing on maritime…” Source: RevenueBase Database · checked Sep 28, 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: maritime security compliance firms. 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 maritime security compliance firms.
- Partial evidence
- Its own public description names part of maritime security compliance firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name maritime security compliance firms. 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 208 maritime security compliance firms based in the United States
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Maritime security compliance firms based in the United States at a glance
As of Sep 28, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 208 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among maritime security compliance firms, 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 “maritime security compliance firms”. 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 maritime security compliance firms), 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 maritime security compliance firms, 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, 545 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 28, 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 maritime security compliance firms, 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 maritime security compliance firms are there based in the United States?
RevenueBase identified 208 maritime security compliance firms 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 maritime security compliance firms?
Houston leads with 15 headquartered companies, followed by Fort Lauderdale (7) and Miami (5).
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 545 verified decision-maker contacts tracked across these 208 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 28, 2026.
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Maritime security compliance firms by geography
- Maritime security compliance firms based in Singapore, Singapore
- Maritime security compliance firms based in London, United Kingdom
- Maritime security compliance firms based in Australia
- Maritime security compliance firms based in Brazil
- Maritime security compliance firms based in France
- Maritime security compliance firms based in Germany
- Maritime security compliance firms based in Greece
- Maritime security compliance firms based in India
- Maritime security compliance firms based in Italy
- Maritime security compliance firms based in the Netherlands
- Maritime security compliance firms based in Singapore
- Maritime security compliance firms based in Türkiye
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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