Company lists · Data refreshed September 2026

Top 25 Oil and gas inspection services worldwide

Name: Oil and gas inspection services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 5,462 companies tracked

RevenueBase identified 5,462 oil and gas inspection services worldwide as of September 2026 and tracks 142,751 professional contacts across them, including 26,503 with verified work emails and 0 with mobile numbers. The United States is the largest market and Houston the largest hub.

This list covers oil and gas inspection services 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 17, 2026. Country and city lists for oil and gas inspection services 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 17, 2026 86% judged on-target in blind review

5,462Companies

142,751Contacts tracked

26,503Verified emails

0Mobile numbers

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The 25 largest oil and gas inspection services worldwide

Ranked by team size

Top 25 of 5,462 oil and gas inspection services worldwide, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to oil and gas inspection services: 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	Pt. Sucofindo	Indirect evidence	South Jakarta, IndonesiaHQ checked Sep 17, 2026	5,001-10,000	4,881 contacts →
	Indirect evidence “SUCOFINDO was established in 1956 as a joint venture company between the Government of the Republic of Indonesia and SGS, Geneve, Switzerland.” Source: RevenueBase Database · checked Sep 17, 2026
2	PT Elnusa TBK	Strong evidence	Jakarta Selatan, IndonesiaHQ checked Sep 17, 2026	1,001-5,000	3,932 contacts →
	Strong evidence “We are the one and only national company that possesses combined competencies in oil & gas services: seismic, drilling and oilfield.” Source: RevenueBase Database · checked Sep 17, 2026
3	Amspec Group	Partial evidence	Cranbury, NJ, United StatesHQ checked Sep 17, 2026	5,001-10,000	3,447 contacts →
	Partial evidence “The AmSpec Group has been relied upon in the testing, inspection, and certification (TIC) sector for several decades.” Source: RevenueBase Database · checked Sep 17, 2026
4	Mistras Group	Strong evidence	Princeton Junction, NJ, United StatesHQ checked Sep 17, 2026	5,001-10,000	2,887 contacts →
	Strong evidence “MISTRAS Group, Inc.(NYSE: MG) is a global leader in technology-enabled industrial asset integrity solutions, serving critical industries including oil & gas, aerospace & defense…” Source: RevenueBase Database · checked Sep 17, 2026
5	OCYAN	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 17, 2026	1,001-5,000	2,427 contacts →
	Indirect evidence “A OCYAN atua há décadas na prestação de serviços para o setor de óleo e gás upstream, estruturando suas operações em três frentes de atuação.” Source: RevenueBase Database · checked Sep 17, 2026
6	PT Surveyor Indonesia	Indirect evidence	Jakarta Selatan, IndonesiaHQ checked Sep 17, 2026	5,001-10,000	2,309 contacts →
	Indirect evidence “Surveyor Indonesia didirikan pada tanggal 1 Agustus 1991.” Source: RevenueBase Database · checked Sep 17, 2026
7	TUV India Pvt. LTD	Indirect evidence	Mumbai, IndiaHQ checked Sep 17, 2026	1,001-5,000	2,277 contacts →
	Indirect evidence “TUV India Pvt.” Source: RevenueBase Database · checked Sep 17, 2026
8	Oilserv	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 17, 2026	1,001-5,000	2,249 contacts →
	Indirect evidence “OiLSERV is a provider of an expanding range of oilfield services, including well logging, well testing, production enhancement, drilling services, surface production management…” Source: RevenueBase Database · checked Sep 17, 2026
9	Applus Europe	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	1,001-5,000	1,670 contacts →
	Partial evidence “Applus+ is a worldwide leader in the testing, inspection, and certification sector.” Source: RevenueBase Database · checked Sep 17, 2026
10	PMI	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 17, 2026	n/a	1,308 contacts →
	Indirect evidence “Training and Development Solutions” Source: RevenueBase Database · checked Sep 17, 2026
11	Cudd Energy Services	Strong evidence	The Woodlands, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,285 contacts →
	Strong evidence “Cudd offers a broad range of technical and specialized oilfield services to companies engaged in the exploration and production of oil and natural gas worldwide.” Source: RevenueBase Database · checked Sep 17, 2026
12	Aries Marine And Engineering Services	Partial evidence	United Arab EmiratesHQ checked Sep 17, 2026	1,001-5,000	1,216 contacts →
	Partial evidence “Aries is the largest Engineering, Inspection & Maintenance firm in the Middle East.” Source: RevenueBase Database · checked Sep 17, 2026
13	Irisndt	Indirect evidence	Edmonton, AB, CanadaHQ checked Sep 17, 2026	10001+	1,212 contacts →
	Indirect evidence “One of the largest independent Asset Integrity companies.” Source: RevenueBase Database · checked Sep 17, 2026
14	Hertel	Indirect evidence	Rotterdam, NetherlandsHQ checked Sep 17, 2026	5,001-10,000	1,167 contacts →
	Indirect evidence “Hertel is a leading international, multi-disciplinary, industrial services company.” Source: RevenueBase Database · checked Sep 17, 2026
15	Tuboscope	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	10001+	1,008 contacts →
	Indirect evidence “For more than 85 years, Tuboscope™ has provided the industry with tubular expertise and an integrated suite of value-added solutions.” Source: RevenueBase Database · checked Sep 17, 2026
16	Applied Technical Services, LLC	Partial evidence	Marietta, GA, United StatesHQ checked Sep 17, 2026	1,001-5,000	890 contacts →
	Partial evidence “Applied Technical Services assists commercial and industrial clients by providing inspection, testing, consulting engineering, and calibration services.” Source: RevenueBase Database · checked Sep 17, 2026
17	Camin Cargo Control INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	877 contacts →
	Partial evidence “At CAMIN, we provide inspection, laboratory testing, and additive treatment solutions to the Petroleum Industry.” Source: RevenueBase Database · checked Sep 17, 2026
18	NDT Global	Partial evidence	Québec, QC, CanadaHQ checked Sep 17, 2026	1,001-5,000	783 contacts →
	Partial 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 17, 2026
19	Tulsa Inspection Resources, LLC	Partial evidence	Tulsa, OK, United StatesHQ checked Sep 17, 2026	1,001-5,000	770 contacts →
	Partial evidence “Core capabilities include: Inspection Services (Chief, CWI, NACE/AMPP, Utility, Environmental, Safety, Poly, etc), Non-Destructive Examination (Ultrasonic Testing (UT), Phased…” Source: RevenueBase Database · checked Sep 17, 2026
20	Techocean Engineering Solutions	Strong evidence	Macaé, BrazilHQ checked Sep 17, 2026	501-1,000	751 contacts →
	Strong evidence “Techocean is a supplier of engineering services focused on the oil & gas industry, creating solutions for steel fabrications as Platforms, Piping Lines, Several Structures and…” Source: RevenueBase Database · checked Sep 17, 2026
21	Deep Industries Limited	Strong evidence	Ahmedabad, IndiaHQ checked Sep 17, 2026	501-1,000	714 contacts →
	Strong evidence “Deep Industries Limited started in the year 1991, with a primary objective of catering the ever increasing demand for Oil and Gas Industry.” Source: RevenueBase Database · checked Sep 17, 2026
22	Oceaneering Asset Integrity	Partial evidence	Bergen, NorwayHQ checked Sep 17, 2026	5,001-10,000	680 contacts →
	Partial evidence “Oceaneering Asset Integrity is one of the largest providers of Integrity and Inspection Services in the world.” Source: RevenueBase Database · checked Sep 17, 2026
23	Sistac	Indirect evidence	Macaé, BrazilHQ checked Sep 17, 2026	501-1,000	624 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 17, 2026
24	OES Asset Integrity Management	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 17, 2026	201-500	618 contacts →
	Indirect evidence “At OES we believe in delivering a service that maintain our clients assets, improves efficiency and protects both people and equipment.” Source: RevenueBase Database · checked Sep 17, 2026
25	Saybolt International	Strong evidence	Vlaardingen, NetherlandsHQ checked Sep 17, 2026	1,001-5,000	594 contacts →
	Strong evidence “Saybolt is the trade name for Core Laboratories' laboratory analyses, independent field inspections, and monitoring and verification programs for crude oil and its derived…” Source: RevenueBase Database · checked Sep 17, 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: oil and gas inspection services. 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 oil and gas inspection services.
Partial evidence: Its own public description names part of oil and gas inspection services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oil and gas inspection services. 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 5,462 oil and gas inspection services worldwide

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Oil and gas inspection services worldwide at a glance

As of Sep 17, 2026

18.6%Verified-email coverage

26.1Average contacts per company

11-50Median size (employees)

3.4%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

2,033

11-50

1,980

51-200

917

201-500

315

501-1,000

1,001-5,000

5,001-10,000

10001+

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 oil and gas inspection services, 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: 31 countries, largest first: the United States, Brazil, Nigeria, the United Kingdom, India, Canada, the United Arab Emirates, Malaysia, Italy, Indonesia and 21 more. Country and city lists for oil and gas inspection services are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “oil and gas inspection services”. 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 oil and gas inspection services), 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 oil and gas inspection services, 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, 26,503 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 17, 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.

Oil and gas inspection services by location

32 lists · largest first

Every Oil and gas inspection services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Oil and gas inspection services based in Rio De Janeiro, Brazil58

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 oil and gas inspection services, 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 oil and gas inspection services are there worldwide?

RevenueBase identified 5,462 oil and gas inspection services 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?

Pt. Sucofindo, headquartered in South Jakarta, tops this list with the largest team on record.

Which country has the most oil and gas inspection services?

The United States leads with 1,235 companies, followed by Brazil (506) and Nigeria (352). Every oil and gas inspection services list by country and city is linked on this page.

Which city has the most oil and gas inspection services?

Houston leads with 184 headquartered companies, followed by Port Harcourt (118) and Dubai (90).

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 26,503 verified decision-maker contacts tracked across these 5,462 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 17, 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.