Company lists · Data refreshed September 2026
Top 25 Nuclear power plant software companies based in the United States
RevenueBase identified 136 nuclear power plant software companies headquartered in the United States as of September 2026 and tracks 19,074 professional contacts across them, including 1,246 with verified work emails and 7,074 with mobile numbers. Charlotte is the largest hub.
This list covers nuclear power plant software 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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.
The 25 largest nuclear power plant software companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | Westinghouse Electric CompanyPartial evidence | 10,898 | |||
“Westinghouse Electric Company is the world's leading supplier of safe and innovative nuclear technology.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,254 | ||||
“EnergySolutions is an international nuclear services company headquartered in Salt Lake City, Utah, and Charlotte, North Carolina, with operations across the United States and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 404 | ||||
“GSE Solutions supports nuclear power and clean-energy fleets worldwide through integrated engineering services and software that strengthen operational performance.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | Sonic SystemsStrong evidence | 245 | |||
“Founded in 1977 Sonic Systems International (SSI) is a full-service quality-consulting firm serving the nuclear power generation utility industry.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | Paragon Energy SolutionsPartial evidence | 234 | |||
“Paragon tackles the most difficult challenges of the nuclear industry-those faced by the current operating fleet as well as the next generation of advanced reactors.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | HI Tech SolutionsStrong evidence | 129 | |||
“Hi Tech Solutions provides services to the nuclear power generation industry in four main areas: outage services (plant outages and reactor maintenance), nuclear fuel cycle…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 119 | ||||
“Aalo Atomics designs and builds factory-manufactured nuclear power plants for data centers, industry, and cities.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 118 | ||||
“At Atkins Nuclear Solutions US, we offer client solutions crafted by the best engineers and specialists in the industry, served with truly exceptional customer service.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | NAC InternationalPartial evidence | 116 | |||
“NAC International Inc.(NAC) is an industry-leading provider of engineering, consulting, and nuclear fuel management solutions for nuclear facility operators, fuel cycle companies…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | HukariascendentStrong evidence | 104 | |||
“HukariAscendent is a technical consulting and engineering company specializing in comprehensive engineering and technical services associated with the nuclear industry and power…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | GCR INCStrong evidence | 101 | |||
“Nuclear and Power Generation and Water Solution data management systems backed by a team of industry experts.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | TrinoorIndirect evidence | 79 | |||
“Welcome to Trinoor At Trinoor, we are the leading innovators behind TAShelix, a state-of-the-art Enterprise Digitization Platform engineered to transform the operations of…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 63 | ||||
“Dominion Engineering, Inc, a division of Allied Power, has over 40 years of experience delivering innovative field service equipment and technology to support nuclear utilities…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | Zachry Nuclear Engineering, INCIndirect evidence | 61 | |||
Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 47 | ||||
“EXCEL has evolved over the last four decades to meet the needs of the nuclear energy industry.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 46 | ||||
“Endevor is a growing software company that creates simple software to solve complex problems.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | Renuke ServicesStrong evidence | 45 | |||
“Managing the transition to 21st century Utilities including Commercial and DOE Nuclear Power, Fossil and Hydro Power, Electrical and Gas Transmissions & Distribution and other…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 42 | ||||
“Analysis and Measurement Services Corporation (AMS) is a nuclear engineering consulting firm and recognized market leader in providing the worldwide nuclear power industry with…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | Transco Products INCIndirect evidence | 42 | |||
Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | Master-Lee Energy Services CorporationStrong evidence | 38 | |||
“Established in 1987, Master-Lee Energy Services was founded to provide the commercial Nuclear Power Industry with engineering, reactor services, decontamination, Reactor Coolant…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | Paschal Solutions, INCPartial evidence | 36 | |||
“At Paschal Solutions, we are more than engineers-we are problem solvers, innovators, and trusted partners in providing nuclear safety and specialized nuclear engineering technical…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | Wmg, INCIndirect evidence | 33 | |||
“Founded in 1979 and now an EnergySolutions company, WMG, Inc.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | Studsvik ScandpowerStrong evidence | 32 | |||
“Studsvik Scandpower Group is a subsidiary of Studsvik AB (STO:SVIK), and specializes in nuclear engineering simulation software that enables nuclear engineers to design nuclear…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 31 | ||||
“EnerSys Corporation is an oil & gas software and services company focused on delivering operational excellence for oil & gas pipeline control rooms.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | 24 | ||||
“At Eichrom Technologies, we help our customers in nuclear industries to change the way they think.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 136 nuclear power plant software companies based in the United States
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Nuclear power plant software companies based in the United States at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
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 nuclear power plant software companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “nuclear power plant software companies”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among nuclear power plant software 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 an evidence 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, 1,246 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 5, 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
How many nuclear power plant software companies are there based in the United States?
RevenueBase identified 136 nuclear power plant software 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?
Westinghouse Electric Company, headquartered in Cranberry Township, tops this list with the largest team on record.
Which city has the most nuclear power plant software companies?
Charlotte leads with 5 headquartered companies, followed by Idaho Falls (4) and Austin (3).
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 1,246 verified decision-maker contacts tracked across these 136 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 5, 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 SmartSearch, 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.
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