Company lists · Data refreshed September 2026

Top 25 Oil and gas IT services worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 27,889 companies tracked

RevenueBase identified 27,889 oil and gas IT services worldwide as of September 2026 and tracks 1,339,955 professional contacts across them, including 256,114 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers oil and gas IT 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 21, 2026. Country and city lists for oil and gas IT 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 21, 2026 86% judged on-target in blind review

27,889Companies

1,339,955Contacts tracked

256,114Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest oil and gas IT services worldwide

Ranked by team size

Top 25 of 27,889 oil and gas IT services worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to oil and gas IT 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	SLB	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	10001+	76,561 contacts →
	Indirect evidence “SLB is a global technology company that has driven energy innovation for more than a century.” Source: RevenueBase Database · checked Sep 21, 2026
2	Halliburton	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	10001+	53,380 contacts →
	Indirect evidence “We collaborate and engineer solutions to maximize asset value for our customers.” Source: RevenueBase Database · checked Sep 21, 2026
3	Saipem	Indirect evidence	Milan, ItalyHQ checked Sep 21, 2026	10001+	34,095 contacts →
	Indirect evidence “Saipem is a global leader in the engineering and construction of major projects for the energy and infrastructure sectors, both offshore and onshore.” Source: RevenueBase Database · checked Sep 21, 2026
4	NOV	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	10001+	29,577 contacts →
	Indirect evidence “NOV delivers technology-driven solutions to empower the global energy industry.” Source: RevenueBase Database · checked Sep 21, 2026
5	Weatherford	Indirect evidence	Dublin, TX, IrelandHQ checked Sep 21, 2026	10001+	28,428 contacts →
	Indirect evidence “Weatherford International plc (Nasdaq: WFRD) is a leading global energy services company.” Source: RevenueBase Database · checked Sep 21, 2026
6	Petronas	Indirect evidence	Kuala Lumpur, MalaysiaHQ checked Sep 21, 2026	10001+	28,095 contacts →
	Indirect evidence “Petroliam Nasional Berhad (PETRONAS) is a leading global energy company committed to powering society’s progress in a responsible and sustainable manner.” Source: RevenueBase Database · checked Sep 21, 2026
7	Mcdermott International, LTD	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	10001+	20,135 contacts →
	Indirect evidence “McDermott is a premier provider of engineering and construction solutions to the energy industry.” Source: RevenueBase Database · checked Sep 21, 2026
8	OXY	Strong evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	10001+	16,245 contacts →
	Strong evidence “Oxy is an international energy company that produces, markets and transports oil and natural gas to maximize value and provide resources fundamental to life.” Source: RevenueBase Database · checked Sep 21, 2026
9	Conocophillips	Strong evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	10001+	15,828 contacts →
	Strong evidence “We are a global oil and gas company tasked with an important job-to safely find and deliver energy for the world.” Source: RevenueBase Database · checked Sep 21, 2026
10	Aker Solutions	Indirect evidence	Fornebu, NorwayHQ checked Sep 21, 2026	10001+	15,774 contacts →
	Indirect evidence “Aker Solutions is a global engineering and technology company known for delivering complex energy projects with trusted quality and predictable results.” Source: RevenueBase Database · checked Sep 21, 2026
11	OIL And Natural GAS Corporation LTD	Strong evidence	New Delhi, IndiaHQ checked Sep 21, 2026	10001+	15,722 contacts →
	Strong evidence “Maharatna ONGC is the largest producer of crude oil and natural gas in India, contributing around 70 per cent of Indian domestic production.” Source: RevenueBase Database · checked Sep 21, 2026
12	Petrofac	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	5,001-10,000	13,261 contacts →
	Indirect evidence “We are a leading international service provider to the energy industry, with a diverse client portfolio including many of the world’s leading energy companies.” Source: RevenueBase Database · checked Sep 21, 2026
13	Petroleum Development Oman	Strong evidence	Muscat, OmanHQ checked Sep 21, 2026	5,001-10,000	12,478 contacts →
	Strong evidence “We are the leading exploration and production company in the Sultanate of Oman that delivers the majority of the country's crude oil production and natural gas supply, but above…” Source: RevenueBase Database · checked Sep 21, 2026
14	Technip Former Company	Indirect evidence	United KingdomHQ checked Sep 21, 2026	10001+	11,255 contacts →
	Indirect evidence “Technip is a former company that was separated into two independent companies: TechnipFMC and Technip Energies, which now operate with no capital ties.” Source: RevenueBase Database · checked Sep 21, 2026
15	Ecopetrol	Indirect evidence	Bogota, ColombiaHQ checked Sep 21, 2026	10001+	10,937 contacts →
	Indirect evidence “Ecopetrol (NYSE: EC) es la compañía más grande en Colombia y uno de los principales grupos de energía de Latinoamérica.” Source: RevenueBase Database · checked Sep 21, 2026
16	Tecnicas Reunidas	Strong evidence	Madrid, SpainHQ checked Sep 21, 2026	10001+	10,588 contacts →
	Strong evidence “TR is an international general contractor engaged in the engineering and construction of industrial facilities in the fields of-Oil & Gas -Refining & Petrochemical -Power…” Source: RevenueBase Database · checked Sep 21, 2026
17	Sulzer	Indirect evidence	Winterthur, SwitzerlandHQ checked Sep 21, 2026	10001+	8,220 contacts →
	Indirect evidence “Sulzer is a global leader in critical applications for core infrastructure and processes for large essential industries around the world.” Source: RevenueBase Database · checked Sep 21, 2026
18	EXPRO	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	5,001-10,000	6,466 contacts →
	Indirect evidence “Long recognized for extraordinary performance, superb safety and long-standing partnerships, and now incorporating Frank’s International, Expro is focused on enabling our…” Source: RevenueBase Database · checked Sep 21, 2026
19	Nabors Industries	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	10001+	5,865 contacts →
	Indirect evidence “Nabors Industries is a leading provider of advanced technology for the energy industry.” Source: RevenueBase Database · checked Sep 21, 2026
20	Woodside Energy	Indirect evidence	Perth, AustraliaHQ checked Sep 21, 2026	1,001-5,000	5,559 contacts →
	Indirect evidence “We aim to thrive through the global energy transition with a low-cost, lower-carbon, profitable, resilient and diversified portfolio.” Source: RevenueBase Database · checked Sep 21, 2026
21	Perenco	Indirect evidence	Londres, United KingdomHQ checked Sep 21, 2026	5,001-10,000	5,220 contacts →
	Indirect evidence “Founded over thirty years ago, Perenco is an independent hydrocarbon producer involved in the entire lifecycle of projects, from exploration to decommissioning.” Source: RevenueBase Database · checked Sep 21, 2026
22	MODEC	Strong evidence	Chuo-ku, JapanHQ checked Sep 21, 2026	5,001-10,000	5,077 contacts →
	Strong evidence “MODEC has been a leading provider of solutions for the floating offshore oil and gas market for over 50 years.” Source: RevenueBase Database · checked Sep 21, 2026
23	Aesa A-Evangelista SA	Indirect evidence	Canning, IndiaHQ checked Sep 21, 2026	5,001-10,000	5,012 contacts →
	Indirect evidence “Since 1948 we specialize in projects for the energy industry.” Source: RevenueBase Database · checked Sep 21, 2026
24	ENOC	Strong evidence	Dubai, United Arab EmiratesHQ checked Sep 21, 2026	5,001-10,000	4,897 contacts →
	Strong evidence “Emirates National Oil Company Group (ENOC) is a leading integrated global oil and gas player operating across the energy sector value chain.” Source: RevenueBase Database · checked Sep 21, 2026
25	Bonatti	Indirect evidence	Parma, United StatesHQ checked Sep 21, 2026	5,001-10,000	4,895 contacts →
	Indirect evidence “Bonatti is an International Contractor providing services to energy industry with over 75 years of experience.” Source: RevenueBase Database · checked Sep 21, 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 IT 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 IT services.
Partial evidence: Its own public description names part of oil and gas IT 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 IT 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 27,889 oil and gas IT services worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 256,114 reachable decision-makers.

Free signup · no credit card

View the full list →

Oil and gas IT services worldwide at a glance

As of Sep 21, 2026

19.1%Verified-email coverage

48.0Average contacts per company

11-50Median size (employees)

3.5%Largest-city concentration · Houston

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

9,397

11-50

9,863

51-200

5,028

201-500

1,838

501-1,000

757

1,001-5,000

670

5,001-10,000

128

10001+

128

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 oil and gas IT 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: Every country. Country and city lists for oil and gas IT services are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “oil and gas IT 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 IT 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 IT 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, 256,114 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 21, 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 IT services by location

117 lists · largest first

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

Countries

Cities

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 IT 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 IT services are there worldwide?

RevenueBase identified 27,889 oil and gas IT 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?

SLB, headquartered in Houston, tops this list with the largest team on record.

Which country has the most oil and gas IT services?

The United States leads with 5,030 companies, followed by India (1,692) and Nigeria (1,559). Every oil and gas IT services list by country and city is linked on this page.

Which city has the most oil and gas IT services?

Houston leads with 968 headquartered companies, followed by Calgary (468) and Dubai (418).

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 256,114 verified decision-maker contacts tracked across these 27,889 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 21, 2026.

Ready to reach these companies? Verified emails and direct dials for all 27,889 oil and gas IT services worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.