Company lists · Data refreshed September 2026

Top 25 Prompt engineering services companies based in the United States

Name: Prompt engineering services companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 719 companies tracked

RevenueBase identified 719 prompt engineering services companies headquartered in the United States as of September 2026 and tracks 12,114 professional contacts across them, including 4,351 with verified work emails. Houston is the largest hub.

This list covers prompt engineering services companies headquartered in the United States, 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.

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

719Companies

12,114Contacts tracked

4,351Verified emails

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The 25 largest prompt engineering services companies based in the United States

Ranked by team size

Top 25 of 719 prompt engineering services companies based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to prompt engineering 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	Recon Management Services, INC	Partial evidence	Sulphur, LA, United StatesHQ checked Sep 17, 2026	501-1,000	420 contacts →
	Partial evidence “ReCon was established in 1995 and has matured as a high quality and competitive engineering consulting firm providing engineering design and project management services to the…” Source: RevenueBase Database · checked Sep 17, 2026
2	Sterling Engineering	Partial evidence	Westchester, IL, United StatesHQ checked Sep 17, 2026	501-1,000	402 contacts →
	Partial evidence “Sterling is an award-winning professional engineering consulting and technical staffing company.” Source: RevenueBase Database · checked Sep 17, 2026
3	M&s Engineering	Partial evidence	Spring Branch, TX, United StatesHQ checked Sep 17, 2026	201-500	319 contacts →
	Partial evidence “Full Service Firm M&S Engineering is a professional engineering services firm whose mission is to provide our clients with quality, efficient services at the greatest overall…” Source: RevenueBase Database · checked Sep 17, 2026
4	C&i Engineering	Partial evidence	Louisville, KY, United StatesHQ checked Sep 17, 2026	201-500	313 contacts →
	Partial evidence “Chemical & Industrial Engineering, Inc.(C&I) is a full-service Engineering, Design & Procurement firm, providing hands-on design expertise for increasing capacity, improving…” Source: RevenueBase Database · checked Sep 17, 2026
5	Dynamic Engineering Consultants, PC	Partial evidence	Lake Como, NJ, United StatesHQ checked Sep 17, 2026	201-500	293 contacts →
	Partial evidence “Full Service Land Development and Consulting Dynamic Engineering Consultants, PC provides comprehensive Professional Engineering and related services to the Land Development…” Source: RevenueBase Database · checked Sep 17, 2026
6	Nexus Engineering Group	Partial evidence	Cleveland, OH, United StatesHQ checked Sep 17, 2026	201-500	255 contacts →
	Partial evidence “Nexus Engineering Group is a full-service engineering, procurement, and construction management (EPCm) firm headquartered in Cleveland, Ohio with offices in Toledo, Ohio, Midland…” Source: RevenueBase Database · checked Sep 17, 2026
7	BSI Engineering	Partial evidence	Mason, OH, United StatesHQ checked Sep 17, 2026	201-500	247 contacts →
	Partial evidence “BSI Engineering is a full-service engineering consulting firm dedicated to delivering innovative, efficient, and effective solutions across various industries.” Source: RevenueBase Database · checked Sep 17, 2026
8	Waldemar S. Nelson & Co., INC	Indirect evidence	New Orleans, LA, United StatesHQ checked Sep 17, 2026	201-500	211 contacts →
	Indirect evidence “For over a half century our professional staff - in meeting technical, schedule, budget, and regulatory requirements - has successfully completed projects in the U.S.” Source: RevenueBase Database · checked Sep 17, 2026
9	Krazan & Associates, INC	Indirect evidence	Clovis, CA, United StatesHQ checked Sep 17, 2026	201-500	197 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
10	Ryzen Solutions	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 17, 2026	201-500	169 contacts →
	Indirect evidence “Since Ryzen Solutions has become a trusted provider to Silicon Valley’s growing product development community.” Source: RevenueBase Database · checked Sep 17, 2026
11	Ford, Bacon & Davis, LLC	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 17, 2026	501-1,000	161 contacts →
	Partial evidence “Ford, Bacon & Davis, LLC is a privately owned, multi-discipline Engineering, Procurement and Construction (EPC) company, with 8 offices across the United States.” Source: RevenueBase Database · checked Sep 17, 2026
12	Todd & Sargent, INC	Indirect evidence	Ames, IA, United StatesHQ checked Sep 17, 2026	51-200	144 contacts →
	Indirect evidence “Todd & Sargent is a design-build industrial construction contractor with more than 90 years of experience building the facilities that feed, fuel, and supply the world.” Source: RevenueBase Database · checked Sep 17, 2026
13	KCL Engineering	Indirect evidence	West Des Moines, IA, United StatesHQ checked Sep 17, 2026	51-200	122 contacts →
	Indirect evidence “Our focus on empowerment, flexibility, and opportunity creates a workplace of happy employees who provide superior customer service, deliver high-quality projects, and delight…” Source: RevenueBase Database · checked Sep 17, 2026
14	RPA Engineering	Partial evidence	Wyomissing, PA, United StatesHQ checked Sep 17, 2026	51-200	116 contacts →
	Partial evidence “RPA Engineering is a professional engineering consulting firm offering mechanical, electrical, structural, and automations systems engineering discipline services, including…” Source: RevenueBase Database · checked Sep 17, 2026
15	KDM Engineering	Partial evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	114 contacts →
	Partial evidence “Founded upon a vision of challenging and changing the energy infrastructure to help light up the world, KDM specializes in engineering consulting and design, program and project…” Source: RevenueBase Database · checked Sep 17, 2026
16	Mid-South Engineering	Partial evidence	Hot Springs, AR, United StatesHQ checked Sep 17, 2026	51-200	111 contacts →
	Partial evidence “Mid-South Engineering Company was founded in 1969 by four engineers with a common vision - to be a complete engineering service provider focused on total dedication to the client.” Source: RevenueBase Database · checked Sep 17, 2026
17	Superior Engineering, LLC	Partial evidence	Hammond, IN, United StatesHQ checked Sep 17, 2026	51-200	107 contacts →
	Partial evidence “Since 1962, Superior Engineering has been recognized as a premier provider of professional engineering services.” Source: RevenueBase Database · checked Sep 17, 2026
18	Orion Engineers Constructors	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 17, 2026	51-200	97 contacts →
	Partial evidence “Orion has the ability to meet your every engineering need from determining the feasibility of your project right through to full EPC, commissioning and startup of industrial…” Source: RevenueBase Database · checked Sep 17, 2026
19	Novus Labs	Indirect evidence	Hillsboro, OR, United StatesHQ checked Sep 17, 2026	51-200	97 contacts →
	Indirect evidence “Novus Labs is a new kind of solutions provider.” Source: RevenueBase Database · checked Sep 17, 2026
20	Sloan Global	Indirect evidence	Braintree, MA, United StatesHQ checked Sep 17, 2026	201-500	97 contacts →
	Indirect evidence “Sloan Global, Inc was founded on the principles of honesty, integrity, and safety.” Source: RevenueBase Database · checked Sep 17, 2026
21	Specialized Engineering Solutions, INC	Partial evidence	Omaha, NE, United StatesHQ checked Sep 17, 2026	51-200	95 contacts →
	Partial evidence “Specialized Engineering Solutions (SES) is a full-service, specialty, engineering firm providing Mechanical, Electrical, Plumbing, Fire Protection, Technology, Lighting Design…” Source: RevenueBase Database · checked Sep 17, 2026
22	Select Engineering INC	Partial evidence	Tulsa, OK, United StatesHQ checked Sep 17, 2026	51-200	95 contacts →
	Partial evidence “Select Engineering, Inc, is a privately-held company with offices in Tulsa,OK and Houston,TX.” Source: RevenueBase Database · checked Sep 17, 2026
23	Gulf States Engineering, INC	Partial evidence	Mobile, AL, United StatesHQ checked Sep 17, 2026	51-200	89 contacts →
	Partial evidence “At Gulf States Engineering, Inc.(GSE), we offer comprehensive services encompassing every stage of an engineering project's life cycle.” Source: RevenueBase Database · checked Sep 17, 2026
24	Becht Engineering Bt, INC	Partial evidence	Warren, NJ, United StatesHQ checked Sep 17, 2026	51-200	85 contacts →
	Partial evidence “For 60 years, Becht Engineering BT, Inc, has been supporting our “Building Technologies” clientele by providing mechanical, electrical, plumbing, fire protection (MEP & FP)…” Source: RevenueBase Database · checked Sep 17, 2026
25	Chemstress	Indirect evidence	Akron, OH, United StatesHQ checked Sep 17, 2026	51-200	81 contacts →
	Indirect evidence “Why Chemstress?” 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: prompt engineering 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 prompt engineering services companies.
Partial evidence: Its own public description names part of prompt engineering services companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name prompt engineering 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 719 prompt engineering services companies based in the United States

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Prompt engineering services companies based in the United States at a glance

As of Sep 17, 2026

35.9%Verified-email coverage

16.8Average contacts per company

1-10Median size (employees)

4.2%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

387

11-50

231

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 719 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 prompt engineering 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 the United States whose own description of what they do matches “prompt engineering 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 prompt engineering 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 prompt engineering services companies, and records with no verified work email. Companies headquartered outside United States 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, 4,351 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.

Prompt engineering services companies by metro

Prompt engineering services companies in Houston30

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 prompt engineering 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 prompt engineering services companies are there based in the United States?

RevenueBase identified 719 prompt engineering services companies headquartered in the United States 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?

Recon Management Services, INC, headquartered in Sulphur, tops this list with the largest team on record.

Which city has the most prompt engineering services companies?

Houston leads with 30 headquartered companies, followed by New York (15) and Miami (11).

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 4,351 verified decision-maker contacts tracked across these 719 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.