Company lists · Data refreshed September 2026

Top 25 Downhole diagnostics software companies worldwide

Name: Downhole diagnostics software companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 1,722 companies tracked

RevenueBase identified 1,722 downhole diagnostics software companies worldwide as of September 2026 and tracks 201,235 professional contacts across them, including 60,864 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers downhole diagnostics software companies 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 28, 2026. Country and city lists for downhole diagnostics software companies 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 28, 2026 86% judged on-target in blind review

1,722Companies

201,235Contacts tracked

60,864Verified emails

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The 25 largest downhole diagnostics software companies worldwide

Ranked by team size

Top 25 of 1,722 downhole diagnostics software companies worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to downhole diagnostics software 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	SLB	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 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 28, 2026
2	Halliburton	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	10001+	53,380 contacts →
	Indirect evidence “We collaborate and engineer solutions to maximize asset value for our customers.” Source: RevenueBase Database · checked Sep 28, 2026
3	NOV	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	10001+	29,577 contacts →
	Indirect evidence “NOV delivers technology-driven solutions to empower the global energy industry.” Source: RevenueBase Database · checked Sep 28, 2026
4	KEY Energy Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,755 contacts →
	Indirect evidence “Headquartered in Houston, Texas, Key Energy Services provides a wide array of leading edge energy production solutions and services.” Source: RevenueBase Database · checked Sep 28, 2026
5	Geolog International	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 28, 2026	1,001-5,000	1,685 contacts →
	Indirect evidence “Every year, drilling teams make decisions worth millions of dollars on incomplete information.” Source: RevenueBase Database · checked Sep 28, 2026
6	EV	Indirect evidence	Norwich, United KingdomHQ checked Sep 28, 2026	n/a	1,589 contacts →
	Indirect evidence “EV specialise in delivering visual analysis that provides timely insight to well and pipeline operators, helping them to understand and resolve their most complex issues.” Source: RevenueBase Database · checked Sep 28, 2026
7	Core Laboratories	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,500 contacts →
	Indirect evidence “With over 70 offices in more than 50 countries located in major oil-producing provinces, Core Laboratories provides services to the world's major, national, and independent oil…” Source: RevenueBase Database · checked Sep 28, 2026
8	ANTON	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 28, 2026	5,001-10,000	1,407 contacts →
	Indirect evidence “Anton Oilfield Services Group (hereinafter as “Anton”) is the world's leading integrated oilfield technology service company that provides clients with a full range of products…” Source: RevenueBase Database · checked Sep 28, 2026
9	Welltec	Indirect evidence	Allerød, DenmarkHQ checked Sep 28, 2026	501-1,000	1,043 contacts →
	Indirect evidence “Welltec® is a global technology company that develops and provides efficient, hi-tech solutions for the energy industry.” Source: RevenueBase Database · checked Sep 28, 2026
10	NDT Global	Partial evidence	Québec, QC, CanadaHQ checked Sep 28, 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 28, 2026
11	LMKR	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	501-1,000	777 contacts →
	Indirect evidence “Founded in 1994 and built on a strong geoscience and data management footprint, LMKR has evolved into a premier technology company expanding its reach to Clean Energy…” Source: RevenueBase Database · checked Sep 28, 2026
12	PASON	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 28, 2026	501-1,000	629 contacts →
	Indirect evidence “Pason is the leading global provider of specialized data management systems for land-based and offshore rigs worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
13	IFS Energy & Resources	Partial evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	201-500	466 contacts →
	Partial evidence “IFS Energy and Resources is the world’s largest independent provider of software and data solutions exclusively serving the upstream oil and gas, mining, and resource industries.” Source: RevenueBase Database · checked Sep 28, 2026
14	NTS Amega Global	Indirect evidence	Dubai, OK, United Arab EmiratesHQ checked Sep 28, 2026	501-1,000	451 contacts →
	Indirect evidence “NTS Amega Global is a market leader in repair, rental and manufacturing solutions supporting energy markets around the world.” Source: RevenueBase Database · checked Sep 28, 2026
15	OIL Field Instrumentation India Pvt. LTD	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	501-1,000	445 contacts →
	Indirect evidence “OFI-was founded in 1992 as an OEM for Mud Logging units / Mud logging services provider.” Source: RevenueBase Database · checked Sep 28, 2026
16	Thru Tubing Solutions	Partial evidence	Newcastle, OK, United StatesHQ checked Sep 28, 2026	501-1,000	428 contacts →
	Partial evidence “Only Thru Tubing Solutions offers the specialized downhole equipment and services to deliver the results you need, right when you need them.” Source: RevenueBase Database · checked Sep 28, 2026
17	Nextcomm Corporation	Partial evidence	United StatesHQ checked Sep 28, 2026	10001+	410 contacts →
	Partial evidence “Established in 2017 as an engineering consulting and software company, NextComm focuses on computer software operations.” Source: RevenueBase Database · checked Sep 28, 2026
18	Global Geophysical Services	Indirect evidence	Missouri City, TX, United StatesHQ checked Sep 28, 2026	201-500	396 contacts →
	Indirect evidence “GGS provides an integrated suite of Geoscience solutions to the global oil and gas industry including high-resolution RG-3D Reservoir Grade® seismic data acquisition, Multi Client…” Source: RevenueBase Database · checked Sep 28, 2026
19	Petrolink	Indirect evidence	United KingdomHQ checked Sep 28, 2026	201-500	362 contacts →
	Indirect evidence “Petrolink is an independent, neutral, wellsite data solutions company providing services in major oil and gas regions worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
20	DUG	Partial evidence	West Perth, AustraliaHQ checked Sep 28, 2026	201-500	314 contacts →
	Partial evidence “DUG is an ASX-listed technology company, headquartered in Australia, that specialises in analytical software development, big-data services and reliable, green, high-performance…” Source: RevenueBase Database · checked Sep 28, 2026
21	TGT Diagnostics	Partial evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 28, 2026	201-500	290 contacts →
	Partial evidence “TGT Diagnostics is a global leader in through-barrier diagnostics for energy production and storage.” Source: RevenueBase Database · checked Sep 28, 2026
22	China National Logging Corporation Cnpc	Indirect evidence	United StatesHQ checked Sep 28, 2026	1,001-5,000	278 contacts →
	Indirect evidence “China National Logging Corporation (CNLC), a subsidiary of CNPC Services & Engineering Ltd, solely on behalf of CNPC providing well bore technical services in international…” Source: RevenueBase Database · checked Sep 28, 2026
23	Katalyst Data Management	Indirect evidence	Calgary, CanadaHQ checked Sep 28, 2026	201-500	270 contacts →
	Indirect evidence “Katalyst Data Management provides subsurface data management and digital transformation solutions for the oil and gas industry.” Source: RevenueBase Database · checked Sep 28, 2026
24	Seeq Corporation	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	51-200	268 contacts →
	Partial evidence “Seeq Corporation develops software and services that accelerate industrial process analytics on industrial process data.” Source: RevenueBase Database · checked Sep 28, 2026
25	Computer Modelling Group	Partial evidence	Calgary, AB, CanadaHQ checked Sep 28, 2026	201-500	267 contacts →
	Partial evidence “Innovators in Simulation Technology CMG is a global software and consulting company that combines science and technology with deep industry expertise to solve complex subsurface…” Source: RevenueBase Database · checked Sep 28, 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: downhole diagnostics software 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 downhole diagnostics software companies.
Partial evidence: Its own public description names part of downhole diagnostics software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name downhole diagnostics software 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 1,722 downhole diagnostics software companies worldwide

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Downhole diagnostics software companies worldwide at a glance

As of Sep 28, 2026

30.2%Verified-email coverage

116.9Average contacts per company

11-50Median size (employees)

11.9%Largest-city concentration · Houston

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

746

11-50

629

51-200

238

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 downhole diagnostics software 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.
Coverage: Every country. Country and city lists for downhole diagnostics software companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “downhole diagnostics software 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 downhole diagnostics software 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 downhole diagnostics software companies, 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, 60,864 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.

Downhole diagnostics software companies by location

13 lists · largest first

Every Downhole diagnostics software companies 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 downhole diagnostics software 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 downhole diagnostics software companies are there worldwide?

RevenueBase identified 1,722 downhole diagnostics software companies 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 downhole diagnostics software companies?

The United States leads with 598 companies, followed by Canada (180) and the United Kingdom (136). Every downhole diagnostics software companies list by country and city is linked on this page.

Which city has the most downhole diagnostics software companies?

Houston leads with 205 headquartered companies, followed by Calgary (118) and Aberdeen (28).

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 60,864 verified decision-maker contacts tracked across these 1,722 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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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.