Company lists · Data refreshed September 2026

Top 25 Due diligence service providers worldwide

RevenueBase identified 397 company matches for due diligence service providers worldwide as of September 2026 and tracks 3,293 professional contacts across them, including 1,156 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for due diligence service providers worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 19, 2026. Country and city lists for due diligence service providers follow the table.

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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 19, 2026 How this list was built
397Companies
3,293Contacts tracked
1,156Verified emails
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The 25 largest due diligence service providers worldwide

Ranked by team size
Top 25 of 397 company matches for due diligence service providers worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchHowell, NJ, United StatesHQ recorded Sep 19, 2026n/a241 contacts →

Exact match

“We know you work hard to get the best deal possible.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2Exact matchTampa, FL, United StatesHQ recorded Sep 19, 202651-200181 contacts →

Exact match

“Maximizing Value.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 19, 202651-200159 contacts →

Exact match

“By leveraging cutting-edge technology and experienced analysts, Neotas are going beyond and setting new standards in Due Diligence, Staff Screening, and Compliance.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4Exact matchParis, FranceHQ recorded Sep 19, 202651-200101 contacts →

Exact match

“Exelmans est un Cabinet de conseil et d’audit spécialisé dans la due diligence financière.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5Exact matchGold River, CA, United StatesHQ recorded Sep 19, 202651-20077 contacts →

Exact match

“CREtelligent’s Radius Platform is the world's first 24/7 "CRE Due Diligence Storefront." CREtelligent provides almost every due diligence service CRE buyers, lenders and sellers…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6Exact matchNew York, NY, United StatesHQ recorded Sep 19, 202651-20075 contacts →

Exact match

“Blue Heron Research Partners is an international leader in qualitative due diligence.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7Exact matchMedford, OR, United StatesHQ recorded Sep 19, 202611-5067 contacts →

Exact match

“Ashland Partners & Company LLP is a PCAOB registered, specialty CPA firm providing due diligence solutions to the investment management industry.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8Exact matchCincinnati, OH, United StatesHQ recorded Sep 19, 202611-5062 contacts →

Exact match

“Live investigator-led analysis is the best way to minimize regulatory, reputational and financial risks.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9Exact matchSanta Monica, CA, United StatesHQ recorded Sep 19, 202651-20049 contacts →

Exact match

“Ironsides is an M&A advisory firm focused exclusively on providing transaction services including financial and accounting due diligence, tax due diligence and structuring…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10Exact matchHong KongHQ recorded Sep 19, 202651-20048 contacts →

Exact match

“Blackpeak is dedicated to uncovering critical risks for our clients worldwide.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11Exact matchAmsterdam, NetherlandsHQ recorded Sep 19, 202611-5047 contacts →

Exact match

“SINCERIUS is frontrunner in data-driven due diligence.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12Exact matchLos Angeles, CA, United StatesHQ recorded Sep 19, 20261,001-5,00047 contacts →

Exact match

“On the leading edge of innovation in commercial real estate transactions, GRS an NV5 Company is one of the largest national provider CRE due diligence services.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13Exact matchNew York, NY, United StatesHQ recorded Sep 19, 202651-20042 contacts →

Exact match

“Hilton Global Associates is a professional investigative research firm providing expert due diligence and unparalleled client service.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14Exact matchHong KongHQ recorded Sep 19, 202651-20039 contacts →

Exact match

“The Search Group (TSG) specializes in due diligence and business intelligence.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15Exact matchUnited StatesHQ recorded Sep 19, 202651-20038 contacts →

Exact match

“We provide real results, real quick.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16Exact matchSan Francisco, CA, United StatesHQ recorded Sep 19, 202611-5037 contacts →

Exact match

“CDS is now part of CrossCountry Consulting.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17Exact matchUnited StatesHQ recorded Sep 19, 202611-5032 contacts →

Exact match

“Providing mortgage review and due diligence services”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18Exact matchColumbia, MD, United StatesHQ recorded Sep 19, 202611-5027 contacts →

Exact match

“Our law firm combines highly specialized legal expertise with business and financial acumen, which allows us to provide our clients with focused intelligence and due diligence on…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Sep 19, 202611-5024 contacts →

Exact match

“Ground Truth Intelligence is the global due diligence platform designed for an ever-changing world.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20Exact matchMumbai, IndiaHQ recorded Sep 19, 202611-5023 contacts →

Exact match

“Founded in 2017, Clearview Consulting Partners (Clearview) specializes in Due Diligence support in typical Mergers & Acquisitions (M&A) and Venture Capital/ Private Equity (VC/PE)…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21Exact matchEden Prairie, MN, United StatesHQ recorded Sep 19, 202611-5022 contacts →

Exact match

“FactRight is the premier source of credible perspective and advice for wealth managers seeking access to alternative investments.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22Exact matchDallas/fort Worth, MI, United StatesHQ recorded Sep 19, 202611-5020 contacts →

Exact match

“SCA Transaction Services LLC provides accounting due diligence and other transaction advisory services to private equity groups, lenders and corporations.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23Exact matchBerlin, GermanyHQ recorded Sep 19, 202611-5020 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24Exact matchArlington, VA, United StatesHQ recorded Sep 19, 202611-5019 contacts →

Exact match

“We have helped dozens of clients gain insight into critical areas of concern by thoroughly reviewing their target company’s information and asking intelligent questions.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25Exact matchOmaha, NE, United StatesHQ recorded Sep 19, 202611-5018 contacts →

Exact match

“Mick Law is a specialty firm comprised of transactional attorneys with MBAs and finance backgrounds, each of whom possesses a concentrated area of expertise and in-depth knowledge.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

Showing 25 of 397 due diligence service providers worldwide

See the full list, filter by size, metro and specialty, and access 1,156 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Due diligence service providers worldwide at a glance

As of Sep 19, 2026
35.1%Verified-email coverage
8.3Average contacts per company
1-10Median size (employees)
5.3%Largest-city concentration · London
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
269
11-50
98
51-200
24
201-500
3
1,001-5,000
2

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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.
Coverage
Every country. Country and city lists for due diligence service providers are linked below.
What qualifies
Company records worldwide whose business descriptions match “due diligence service providers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 1,156 professional contacts with verified work emails across the full matched dataset. 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 19, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Due diligence service providers by location

2 lists · largest first

Every Due diligence service providers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “due diligence service providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many due diligence service providers are there worldwide?

RevenueBase identified 397 company matches for due diligence service providers worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Gparency tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most due diligence service providers?

The United States leads with 137 companies, followed by the United Kingdom (28). Every due diligence service providers list by country and city is linked on this page.

Which city has the most due diligence service providers?

London leads with 21 company records, followed by New York (14) and Sao Paulo (10).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,156 professional contacts with verified work emails tracked across these 397 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 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.