NOT ARTIFICIAL INTELLIGENCE.
DILIGENCE INTELLIGENCE.

For over 20 years, Castle Hall has supported institutional investors with independent, decision-grade due diligence across the alternative investment industry.
Today, we combine deep expertise with intelligent technology to deliver faster, more consistent insight across the full diligence lifecycle.

Speak to our team

Request a demo

WHO WE ARE

Castle Hall is a leading independent provider of operational due diligence, supporting allocators and asset managers globally.

With more than 10,000 diligence reviews completed, we bring structure, consistency, and clarity to complex investment decisions - across hedge funds, private equity, private debt, and real assets.
Our approach is built on independence, proven frameworks, and a clear objective: 

to deliver diligence you can rely on.

Speak to our team

THE REALITY OF DUE DILIGENCE TODAY

Due diligence has never been more important, or more complex. The challenge is no longer access to information. It’s turning that information into clear, decision-ready insight.

Learn more

80%

of managers have operational gaps  they are not aware of

Allocators are moving diligence earlier in the investment process

Research is becoming faster, but often less reliable

Teams are under increasing pressure to do more, with less

What we do

We support clients across the full due diligence lifecycle, from early-stage research through to full operational diligence and ongoing monitoring.

Our work is designed to remove friction, reduce uncertainty, and support better decision-making at every stage.

FOR ALLOCATORS

We help institutional investors assess risk, validate operations, and make confident investment decisions.

Full operational due diligence – OpsReview
Access to ~2000 ODD library - DiligenceLibrary
Accelerated early-stage screening through verified data – DDX Verification
Manager and service provider research - KYGP, KYSP
Portfolio monitoring and ongoing oversight – DiligenceProfessional

FOR MANAGERS

We help fund managers understand and strengthen their operational standing, and communicate it clearly to investors.

Independent operational assessments – DDX Benchmark
Peer benchmarking and gap analysis
Pre-emptive diligence preparation
Verified outputs to support investor conversations – DDX Verification
Increased confidence throughout fundraising

FOR SERVICE PROVIDERS

We support firms across the investment ecosystem in assessing counterparties and strengthening their positioning.

Counterparty and client due diligence
Market benchmarking and positioning
Ongoing monitoring and risk visibility

The Full Diligence Cycle

We deliver due diligence through a combination of expert-led reviews and technology-enabled platforms.

Operational due diligence

Full operational due diligence reports (OpsReview)
DDX Verification - standardised, shareable diligence outputs
DDX Benchmark - independent operational assessments and peer comparison

DDX: due diligence exchange

A centralised platform for accessing and sharing diligence data across managers, funds, and service providers.

Search across thousands of entities
Standardised, verified information
Faster, more efficient early-stage screening

DILIGENCEPROFESSIONAL

A portfolio monitoring and diligence management platform for institutional investors.

Centralised reporting and document repository
Portfolio-wide risk visibility
Ongoing monitoring and oversight

DILIGENCEINTELLIGENCE

Next-generation research and intelligence capabilities designed to support faster, more structured early-stage diligence.

Built on Castle Hall’s analytical frameworks and expertise, DiligenceIntelligence will deliver clear, decision-ready outputs - without the noise.

DUE DILIGENCE. SOLVED.

Independent
No conflicts, no bias

Proven
20+ years of operational due diligence expertise

Comprehensive
Full lifecycle coverage

Consistent
Structured frameworks and repeatable methodologies

Technology-enabled
Improving speed without compromising quality

NOT ARTIFICIAL INTELLIGENCE.
DILIGENCE INTELLIGENCE.