380 firms sell human-led integrity due diligence worldwide — only 12 disclose revenue

Asked (summary):

Provide a comprehensive list of all firms offering integrity due diligence services, with company size, website URL and estimated revenue, plus anything else relevant for sizing this market and its players.

A broad live-web scan surfaced 380 candidate firms globally that explicitly advertise bespoke, human-led integrity, investigative, reputational or enhanced due diligence — a discovery set out of an unknown total universe, not an authoritative registry. Of the 380, 285 have a discovered website, 154 a headquarters, 46 a public employee figure and only 12 a public revenue estimate; evidence spans 221 service-source hosts, with no single source page behind more than 3.4% of rows.

Every firm found, sized by evidence, coloured by what the public record discloses

Each circle is one firm; area reflects supporting pages found in the scan (1–173). Colour shows the deepest public scale data available — the shrinking green-to-grey gradient is the market-sizing problem itself. Hover or tap a circle for the firm’s facts.

Revenue estimate public (12) Employee size only (34) Headquarters only (112) Name and services only (222)

Diversified giants dominate disclosed scale — Deloitte reports US$70.5B company-wide revenue and 470,000 staff, figures that describe the whole firm, not its diligence practice. worldmetrics.org

Pure-play specialists that do disclose are far smaller: Nardello & Co. at an estimated $22M with ~100 staff, K2 Integrity at ~$50M with 201–500. fortariscapital.com

Kroll, the largest independent specialist found, reports $1.5B+ revenue and 5,001–10,000 employees. revenuebase.ai

368 of 380 firms publish no revenue figure at all — sparse disclosure is itself the key sizing finding; summing whole-company revenues would overstate this service market. chambers.com

The full long-list: 380 candidate firms

Employee and revenue figures are third-party estimates describing the whole company, not the integrity-due-diligence practice. Blank cells mean no public figure was found — never zero. Borderline enhanced-due-diligence providers remain in the list as candidates for validation.

Company	Website	Headquarters	Employees (est.)	Revenue (est., whole company)	Ownership	Founded	Service scope	Pages	Sources

Method: live-web discovery scan of firms explicitly advertising bespoke, human-led integrity, investigative, reputational or enhanced due diligence, business or corporate intelligence, or transaction-focused background investigations; 380 canonicalized firms, one row each. Software-only KYC/AML vendors, consumer background-check sites, and firms described only as law, audit, cybersecurity, physical security or pre-employment screening were excluded; some borderline providers remain as validation candidates. Coverage audit: 285 websites, 154 headquarters, 46 employee observations, 12 revenue estimates, 221 distinct service-source hosts; the most-used service URL supports 13 rows (3.4%). Employee and revenue figures are third-party, company-level estimates. Next-stage sizing: validate the set, fill employee gaps, split pure-play from diversified firms, estimate each firm’s diligence share, and triangulate with project volumes and price points. Long service descriptions are truncated in the table for space.

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