Company lists · Data refreshed September 2026

Top 25 Underwater structural inspection equipment worldwide

RevenueBase identified 1,292 underwater structural inspection equipment worldwide as of September 2026 and tracks 24,162 professional contacts across them, including 4,892 with verified work emails. The United States is the largest market and Singapore the largest hub.

This list covers underwater structural inspection equipment worldwide, 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 22, 2026. Country and city lists for underwater structural inspection equipment follow the table.

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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 22, 2026 86% judged on-target in blind review
1,292Companies
24,162Contacts tracked
4,892Verified emails
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The 25 largest underwater structural inspection equipment worldwide

Ranked by team size
Top 25 of 1,292 underwater structural inspection equipment worldwide, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to underwater structural inspection equipment: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceBrazilHQ checked Sep 22, 2026n/a2,224 contacts →

Indirect evidence

“Rov company.”

Source: RevenueBase Database · checked Sep 22, 2026
2Indirect evidenceOslo, NorwayHQ checked Sep 22, 20261,001-5,0001,375 contacts →

Indirect evidence

“DeepOcean is a technology-driven, independent solution provider in the ocean space.”

Source: RevenueBase Database · checked Sep 22, 2026
3Partial evidenceAbu Dhabi, United Arab EmiratesHQ checked Sep 22, 2026201-5001,279 contacts →

Partial evidence

“(Underwater Engineering) S.A.L was established in 1976.”

Source: RevenueBase Database · checked Sep 22, 2026
4Partial evidenceHouston, TX, United StatesHQ checked Sep 22, 2026n/a789 contacts →

Partial evidence

“Energo Engineering is a KBR Company that provides the full package of structural integrity management (SIM) and advanced structural engineering services for offshore floating and…”

Source: RevenueBase Database · checked Sep 22, 2026
5Indirect evidenceMacaé, BrazilHQ checked Sep 22, 2026501-1,000624 contacts →

Indirect evidence

“A SISTAC é líder no segmento de inspeção, manutenção e reparo offshore na indústria de óleo e gás no Brasil, através de acesso com embarcações de apoio marítimo, mergulhadores…”

Source: RevenueBase Database · checked Sep 22, 2026
6Indirect evidenceSharjah, United Arab EmiratesHQ checked Sep 22, 2026501-1,000618 contacts →

Indirect evidence

“Unique Group is a leading specialist and integrated engineering solutions provider across the global subsea, renewables, oil and gas, and defence industries.”

Source: RevenueBase Database · checked Sep 22, 2026
7Indirect evidenceLagos, NigeriaHQ checked Sep 22, 2026201-500409 contacts →

Indirect evidence

“HydroDive provides a broad range of Marine Vessels, Air, Mixed Gas and Saturation Diving, ROV, AUV and Survey Services primarily to the offshore & inshore Petroleum Industry of…”

Source: RevenueBase Database · checked Sep 22, 2026
8Indirect evidenceDammam, Saudi ArabiaHQ checked Sep 22, 2026501-1,000404 contacts →

Indirect evidence

“This page is dedicated to Mermaid Subsea Saudi Arabia.”

Source: RevenueBase Database · checked Sep 22, 2026
9Partial evidenceCairo, EgyptHQ checked Sep 22, 2026501-1,000385 contacts →

Partial evidence

“MCS offers turnkey services in offshore inspection and asset integrity with its own designed and developed software products which digitally transform and improve inspection and…”

Source: RevenueBase Database · checked Sep 22, 2026
10Strong evidenceWesthill, United KingdomHQ checked Sep 22, 2026501-1,000368 contacts →

Strong evidence

“Established in 1985, Ashtead Technology has grown organically and through strategic acquisition to become the leading provider of equipment rental solutions, advanced underwater…”

Source: RevenueBase Database · checked Sep 22, 2026
11Indirect evidenceDordrecht, NetherlandsHQ checked Sep 22, 2026201-500364 contacts →

Indirect evidence

“N-Sea is an end-to-end subsea services provider.”

Source: RevenueBase Database · checked Sep 22, 2026
12Indirect evidenceAberdeen, United StatesHQ checked Sep 22, 2026201-500319 contacts →

Indirect evidence

“ROVOP is your global ROV specialist.”

Source: RevenueBase Database · checked Sep 22, 2026
13Partial evidenceSriracha, ThailandHQ checked Sep 22, 2026501-1,000318 contacts →

Partial evidence

“Mermaid Subsea today operates as a unified structured unit across markets offering customers a comprehensive range of subsea solutions through a highly competent technical and…”

Source: RevenueBase Database · checked Sep 22, 2026
14Indirect evidenceAbu Dhabi, United Arab EmiratesHQ checked Sep 22, 2026201-500267 contacts →

Indirect evidence

“SAFEEN Survey & Subsea Services is a premier provider of integrated offshore survey, diving and subsea engineering solutions across the UAE, GCC and globally.”

Source: RevenueBase Database · checked Sep 22, 2026
15Indirect evidenceDubai, United Arab EmiratesHQ checked Sep 22, 2026201-500238 contacts →

Indirect evidence

“Dulam International is a leading provider of subsea services to the oil and gas industry in the Middle East and Indian Subcontinent.”

Source: RevenueBase Database · checked Sep 22, 2026
16Partial evidenceWashougal, WA, United StatesHQ checked Sep 22, 202651-200236 contacts →

Partial evidence

“Ballard Marine Construction (Ballard) is a specialty marine and underwater contractor.”

Source: RevenueBase Database · checked Sep 22, 2026
17Indirect evidenceVästra Frölunda, SwedenHQ checked Sep 22, 2026201-500213 contacts →

Indirect evidence

“We collect and process information to visualise the conditions of the seabed.”

Source: RevenueBase Database · checked Sep 22, 2026
18Strong evidenceOrlando, FL, United StatesHQ checked Sep 22, 2026201-500212 contacts →

Strong evidence

“CUES is the world's leading manufacturer of closed circuit television video (CCTV) inspection, rehabilitation, pipe profiling equipment and pipeline inspection/asset management…”

Source: RevenueBase Database · checked Sep 22, 2026
19Partial evidenceEssex, CT, United StatesHQ checked Sep 22, 2026201-500190 contacts →

Partial evidence

“Since 1969, Underwater Construction Corporation (UCC) has been a leading provider of underwater services to commercial and government facilities.”

Source: RevenueBase Database · checked Sep 22, 2026
20Strong evidenceChennai, IndiaHQ checked Sep 22, 202651-200186 contacts →

Strong evidence

“Planys is an Indian deep tech start-up creating a paradigm shift in the underwater inspection industry and maritime warfare.”

Source: RevenueBase Database · checked Sep 22, 2026
21Indirect evidenceMiami, FL, United StatesHQ checked Sep 22, 2026201-500176 contacts →

Indirect evidence

“Welcome to Subsea Global Solutions where EVERY DAY our goal is to deliver unrivaled service.”

Source: RevenueBase Database · checked Sep 22, 2026
22Indirect evidenceLargo, United StatesHQ checked Sep 22, 2026201-500170 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 22, 2026
23Indirect evidenceDen Helder, NetherlandsHQ checked Sep 22, 202651-200160 contacts →

Indirect evidence

“Bluestream is now part of OEG's subsea service division.”

Source: RevenueBase Database · checked Sep 22, 2026
24Indirect evidencePuerto Montt, ChileHQ checked Sep 22, 2026501-1,000158 contacts →

Indirect evidence

“Instalación de centros de cultivo acuícola.”

Source: RevenueBase Database · checked Sep 22, 2026
25Indirect evidenceJakarta Selatan, IndonesiaHQ checked Sep 22, 202651-200152 contacts →

Indirect evidence

“Bintang Subsea - a DeepOcean Company - is a technology-driven, independent solution provider in the ocean space.”

Source: RevenueBase Database · checked Sep 22, 2026

Showing 25 of 1,292 underwater structural inspection equipment worldwide

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Underwater structural inspection equipment worldwide at a glance

As of Sep 22, 2026
20.2%Verified-email coverage
18.7Average contacts per company
11-50Median size (employees)
1.8%Largest-city concentration · Singapore
Sep 22, 2026Page data refreshed

Companies by employee count

1-10
606
11-50
469
51-200
163
201-500
27
501-1,000
13
1,001-5,000
6

Email recency is reported on each country list linked below.

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 underwater structural inspection equipment, 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.
Coverage
Every country. Country and city lists for underwater structural inspection equipment are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “underwater structural inspection equipment”. 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 underwater structural inspection equipment), 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 underwater structural inspection equipment, and records with no verified work email.
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, 4,892 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 22, 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.

Underwater structural inspection equipment by location

9 lists · largest first

Every Underwater structural inspection equipment list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 underwater structural inspection equipment, 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 underwater structural inspection equipment are there worldwide?

RevenueBase identified 1,292 underwater structural inspection equipment worldwide 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?

Free Lancer, headquartered in Worldwide, tops this list with the largest team on record.

Which country has the most underwater structural inspection equipment?

The United States leads with 186 companies, followed by the United Kingdom (144) and Brazil (65). Every underwater structural inspection equipment list by country and city is linked on this page.

Which city has the most underwater structural inspection equipment?

Singapore leads with 23 headquartered companies, followed by Aberdeen (22) and Rio De Janeiro (14).

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 4,892 verified decision-maker contacts tracked across these 1,292 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 22, 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.