Company lists · Data refreshed September 2026

Top 25 Subsea services companies based in Canada

Name: Subsea services companies based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 99 companies tracked

RevenueBase identified 99 subsea services companies headquartered in Canada as of September 2026 and tracks 2,128 professional contacts across them, including 628 with verified work emails. Dartmouth is the largest hub.

This list covers subsea services companies headquartered in Canada, 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.

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

99Companies

2,128Contacts tracked

628Verified emails

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The 25 largest subsea services companies based in Canada

Ranked by team size

Top 25 of 99 subsea services companies based in Canada, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to subsea services companies: 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	NDT Global	Strong evidence	Québec, QC, CanadaHQ checked Sep 22, 2026	1,001-5,000	783 contacts →
	Strong evidence “NDT Global is the leading provider of inline diagnostic solutions, advanced data insights, subsea inspection, and integrity management services that safeguard energy-sector…” Source: RevenueBase Database · checked Sep 22, 2026
2	Atlantic Towing	Indirect evidence	Saint John, NB, CanadaHQ checked Sep 22, 2026	501-1,000	194 contacts →
	Indirect evidence “Atlantic Towing is a leading provider of Offshore Supply, Port and Coastal marine services, operating in the North Atlantic, South Atlantic, Arctic and Pacific Coastal regions, as…” Source: RevenueBase Database · checked Sep 22, 2026
3	Techno Canada INC	Indirect evidence	Edmonton, AB, CanadaHQ checked Sep 22, 2026	201-500	190 contacts →
	Indirect evidence “Techno Canada Inc.(TCI), a company incorporated in Alberta, provides a diverse range of high quality oil field services across the Oil & Gas upstream value chain to a global…” Source: RevenueBase Database · checked Sep 22, 2026
4	Reliance Offshore, A Subsidiary Of I. H. Mathers	Strong evidence	St John’s, NL, CanadaHQ checked Sep 22, 2026	201-500	64 contacts →
	Strong evidence “Reliance Offshore is the offshore & marine personnel subsidiary of the I.” Source: RevenueBase Database · checked Sep 22, 2026
5	Siem Offshore Canada	Indirect evidence	Dartmouth, NS, CanadaHQ checked Sep 22, 2026	51-200	55 contacts →
	Indirect evidence “Siem Offshore manages a harsh-weather fleet of offshore support vessels servicing major offshore energy companies.” Source: RevenueBase Database · checked Sep 22, 2026
6	Canada Pump & Power	Indirect evidence	Fort Saskatchewan, AB, CanadaHQ checked Sep 22, 2026	51-200	52 contacts →
	Indirect evidence “Canada Pump & Power is a leading provider of industrial marine services and products, specializing in four core areas: DIVE – PUMP – BARGE – DREDGE.” Source: RevenueBase Database · checked Sep 22, 2026
7	Inversa Systems	Indirect evidence	Fredericton, NB, CanadaHQ checked Sep 22, 2026	11-50	35 contacts →
	Indirect evidence “Inversa Systems, is an engineering company that provides asset integrity management products and solutions using diagnostic information created by its unique condition assessment…” Source: RevenueBase Database · checked Sep 22, 2026
8	Ocean Floor Geophysics	Indirect evidence	Burnaby, BC, CanadaHQ checked Sep 22, 2026	11-50	28 contacts →
	Indirect evidence “Now an OceanSight company!” Source: RevenueBase Database · checked Sep 22, 2026
9	International Submarine Engineering LTD	Indirect evidence	Port Coquitlam, BC, CanadaHQ checked Sep 22, 2026	51-200	27 contacts →
	Indirect evidence “About International Submarine Engineering Ltd.” Source: RevenueBase Database · checked Sep 22, 2026
10	Canpac Marine Services INC	Indirect evidence	North Vancouver, BC, CanadaHQ checked Sep 22, 2026	51-200	26 contacts →
	Indirect evidence “Canpac Marine Services Inc, is based in the Port of Vancouver, Canada and has been providing marine services to inland, coastal, and offshore sectors since 1965.” Source: RevenueBase Database · checked Sep 22, 2026
11	ASI Marine	Indirect evidence	Stoney Creek, ON, CanadaHQ checked Sep 22, 2026	51-200	25 contacts →
	Indirect evidence “ASI Marine (ASI) delivers customized, data-driven solutions for underwater surveys, inspections, maintenance, tunneling, and mussel monitoring & control.” Source: RevenueBase Database · checked Sep 22, 2026
12	MVC Océan INC	Indirect evidence	Trois-rivières, QC, CanadaHQ checked Sep 22, 2026	51-200	25 contacts →
	Indirect evidence “MVC Océan has been carrying out maritime and underwater projects since 1970.” Source: RevenueBase Database · checked Sep 22, 2026
13	Subc Imaging	Indirect evidence	Clarenville, NL, CanadaHQ checked Sep 22, 2026	11-50	25 contacts →
	Indirect evidence “Harshest Conditions.” Source: RevenueBase Database · checked Sep 22, 2026
14	Dominion Diving LTD	Strong evidence	Dartmouth, NS, CanadaHQ checked Sep 22, 2026	11-50	23 contacts →
	Strong evidence “Founded in 1969, Dominion Diving Limited has advanced to become the largest professional diving, ROV and subsea services company in Canada.” Source: RevenueBase Database · checked Sep 22, 2026
15	Canfish Services INC	Indirect evidence	Nisku, AB, CanadaHQ checked Sep 22, 2026	11-50	19 contacts →
	Indirect evidence “Canfish Services is proud to have the expertise required to provide technical support and equipment for all levels of fishing and pipe recovery well repair requirements.” Source: RevenueBase Database · checked Sep 22, 2026
16	Seaforth Geosurveys INC	Indirect evidence	Dartmouth, NS, CanadaHQ checked Sep 22, 2026	11-50	17 contacts →
	Indirect evidence “For more than 30 years, Seaforth has embraced innovation and adapted through change to deliver reliable offshore survey, geotechnical, and site characterisation solutions in the…” Source: RevenueBase Database · checked Sep 22, 2026
17	Shark Marine Technologies INC	Indirect evidence	St.catharines, ON, CanadaHQ checked Sep 22, 2026	11-50	16 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
18	Indyco INC	Indirect evidence	Brossard, QC, CanadaHQ checked Sep 22, 2026	51-200	15 contacts →
	Indirect evidence “INDYCO est une entreprise spécialisée en génie civil maritime et environnemental, incluant la réalisation de travaux sous-marins spécialisés.” Source: RevenueBase Database · checked Sep 22, 2026
19	Divex Marine INC	Indirect evidence	Mont-st-hilaire, QC, CanadaHQ checked Sep 22, 2026	11-50	15 contacts →
	Indirect evidence “En affaires depuis 1963, Divex Marine se spécialise dans le service de travaux sous-marins destinés à appuyer les entreprises maritimes, les firmes d'ingénierie, les organismes…” Source: RevenueBase Database · checked Sep 22, 2026
20	Seamor Marine LTD	Indirect evidence	Nanaimo, BC, CanadaHQ checked Sep 22, 2026	11-50	13 contacts →
	Indirect evidence “SEAMOR Marine are pioneers in the global Inspection Class underwater ROV market, tracing our roots back to the first prototype, developed in 1989.” Source: RevenueBase Database · checked Sep 22, 2026
21	Rov3d	Strong evidence	St John’s, NL, CanadaHQ checked Sep 22, 2026	1-10	12 contacts →
	Strong evidence “Whitecap Scientific is the home of ROV3D, a software solution dedicated to giving you the answers you need about your subsea assets.” Source: RevenueBase Database · checked Sep 22, 2026
22	Deepsix Subsea International	Strong evidence	Kelowna, BC, CanadaHQ checked Sep 22, 2026	11-50	10 contacts →
	Strong evidence “Deepsix was established with a vision to deliver subsea and hyperbaric services in Western Canada and beyond.” Source: RevenueBase Database · checked Sep 22, 2026
23	Omnitech Electronics INC	Strong evidence	Dartmouth, NS, CanadaHQ checked Sep 22, 2026	11-50	9 contacts →
	Strong evidence “Omnitech Electronics Incorporated provides specialized engineering services with expertise in electronics, software design, and subsea hardware.” Source: RevenueBase Database · checked Sep 22, 2026
24	Dean Construction Company	Indirect evidence	Lasalle, ON, CanadaHQ checked Sep 22, 2026	11-50	8 contacts →
	Indirect evidence “Large scale marine contractor specializing in heavy marine construction with a focus on pipeline deployments, pile driving, shoreline protection, full construction of water…” Source: RevenueBase Database · checked Sep 22, 2026
25	Services Subaquatiques BLM INC	Indirect evidence	Lévis, QC, CanadaHQ checked Sep 22, 2026	11-50	7 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026

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: subsea services 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 subsea services companies.
Partial evidence: Its own public description names part of subsea services companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name subsea services 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 subsea services companies based in Canada

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Subsea services companies based in Canada at a glance

As of Sep 22, 2026

29.5%Verified-email coverage

21.5Average contacts per company

11-50Median size (employees)

7.1%Largest-city concentration · Dartmouth

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Canada, so it is reported there. Company counts and contact totals on this page are exact for Canada, over 99 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 subsea services 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 Canada whose own description of what they do matches “subsea services 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 subsea services 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 subsea services companies, and records with no verified work email. Companies headquartered outside Canada 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, 628 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.

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 subsea services 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 subsea services companies are there based in Canada?

RevenueBase identified 99 subsea services companies headquartered in Canada 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?

NDT Global, headquartered in Quebec, tops this list with the largest team on record.

Which city has the most subsea services companies?

Dartmouth leads with 7 headquartered companies, followed by Calgary (6) and North Vancouver (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 628 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 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.