Company lists · Data refreshed September 2026
Top 25 Root cause analysis consulting firms based in the United States
RevenueBase identified 119 root cause analysis consulting firms headquartered in the United States as of September 2026 and tracks 689 professional contacts across them, including 296 with verified work emails and 293 with mobile numbers. Houston is the largest hub.
This list covers root cause analysis consulting firms 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 6, 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 root cause analysis consulting firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | Kepner-TregoeIndirect evidence | 133 | |||
“For over 60 years, Kepner-Tregoe has empowered thousands of companies to solve millions of problems.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 86 | ||||
“Rios Partners provides management consulting services to commercial, non-profit, and government clients in the Washington, D.C.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | ShaininStrong evidence | 74 | |||
“In 1947, Dorian Shainin developed the concept of the "Red X," or the dominant hidden root cause for process variations and their resulting problems.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | SologicIndirect evidence | 29 | |||
“Sologic provides RCA and FMEA technology, training, and expertise to solve problems and reduce risk.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | QSG Quality Support Group Excellence In Training & ConsultingIndirect evidence | 27 | |||
“VISIT OUR WEBSITE: Quality Support Group Inc.(QSG) has been helping organizations achieve their core objectives since 1993.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | Reliability Center, INCStrong evidence | 23 | |||
“Reliability Center, Inc, helps make Root Cause Analysis better, faster, and easier-from single sites to global enterprises.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | ThinkreliabilityIndirect evidence | 21 | |||
“Why we do what we do We improve organizational cultures one person-one mindset-at a time.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | 21 | ||||
“Every company has a culture.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | Vertex11Indirect evidence | 19 | |||
“Challenges are rarely binary.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | 13 | ||||
“We are a management consulting firm that pushes back and challenges your approach because we only care about what’s best for your business.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | WD Associates, INCIndirect evidence | 12 | |||
“Clients that come to WD know they have challenges, and look for us to help them determine the key gaps and strategies to improve their performance.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | Forensic IT INCStrong evidence | 10 | |||
“At Forensic IT, we focus on the Root Cause of issues and use data to drive the decisions in everything we do.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | Street Link ServicesIndirect evidence | 7 | |||
“Our unique team of strategists help teams and companies overcome their biggest business challenges.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | 7 | ||||
“For more than three decades Conger-Elsea has been recognized as the trusted global leader for premier, CERTIFIED TRAINING and CONSULTING solutions and services for:(RCA) Root…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | 7 | ||||
“Multi-faceted consultant and coach with significant human-resources experience who applies expertise in cross- functional process improvement to achieve meaningful organizational…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | 6 | ||||
“At BusinessWhys, we help companies drive ROI by focusing on the WHY.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | VPI StrategiesIndirect evidence | 5 | |||
“WE GET IT.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | The Morphing GroupIndirect evidence | 5 | |||
“When strategy is clear but execution is stuck, we find out why, and help fix it.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | 4 | ||||
“ForceBuilders diagnoses what's really going on inside software organizations and builds what fixes it.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | Lean QA Consulting & TrainingIndirect evidence | 4 | |||
“Suppose it is tempting, if the only tool you have is a hammer, to treat everything as if it were a nail."- Abraham Maslow.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | Integral Concepts, INCPartial evidence | 3 | |||
“ABOUT US Integral Concepts’ professionals provide consulting and training services to companies around the world.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 22 | SynthesusIndirect evidence | 3 | |||
“An orchestra is comprised of many parts, from the strings and woodwinds to the brass and percussion.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | Failsafe Network, INCIndirect evidence | 3 | |||
“Failures happen.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | 3 | ||||
“Elderberry Consulting Value Added Partner in Highly Regulated Industries • We are a group of inquisitive passionate Subject Matter Experts (SME)- Cost and Quality Engineers -…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | Peak Catalyst GroupStrong evidence | 3 | |||
“At PCG we are experts in identifying root causes of issues and creating clear strategic roadmaps to more efficient business practices.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 119 root cause analysis consulting firms based in the United States
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Root cause analysis consulting firms based in the United States at a glance
As of Sep 6, 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 root cause analysis consulting firms, 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 “root cause analysis consulting firms”. 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 root cause analysis consulting firms, 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, 296 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 6, 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 root cause analysis consulting firms are there based in the United States?
RevenueBase identified 119 root cause analysis consulting firms 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?
Kepner-Tregoe, headquartered in Princeton, tops this list with the largest team on record.
Which city has the most root cause analysis consulting firms?
Houston leads with 8 headquartered companies, followed by Boston (3) and Denver (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 296 verified decision-maker contacts tracked across these 119 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 6, 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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