Company lists · Data refreshed November 2026

Top 24 Investigation agencies based in Australia

RevenueBase identified 161 company matches for investigation agencies associated with Australia as of November 2026 and tracks 1,293 professional contacts across them, including 458 with verified work emails. Sydney is the largest hub.

This list covers company matches for investigation agencies associated with Australia, 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 November 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
161Companies
1,293Contacts tracked
458Verified emails
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The 24 largest investigation agencies based in Australia

Ranked by team size
Top 24 of 161 company matches for investigation agencies based in Australia, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 matchBrisbane Cbd, AustraliaHQ recorded Nov 6, 202651-20073 contacts →

Exact match

“With a history dating back to 1979, Risk & Security Management is Australia’s leading provider of mercantile and investigation services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchCarlton, AustraliaHQ recorded Nov 6, 202651-20066 contacts →

Exact match

“For decades, LKA Group has provided the highest level of service to all clients, from small business to multinational corporations and governments.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchGold Coast, AustraliaHQ recorded Nov 6, 202651-20041 contacts →

Exact match

“Brooksight Investigations are one of the most respected investigation teams operating throughout Australia.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchSydney, AustraliaHQ recorded Nov 6, 202651-20041 contacts →

Exact match

“Quantumcorp provides a full range of investigation services to insurers, self-insurers, insurance lawyers, claims management companies, and large employers.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchSouth Melbourne, AustraliaHQ recorded Nov 6, 2026n/a38 contacts →

Exact match

“Detective Services (DS) owned & operated by e Mark Grover in Melbourne, one of Australia's most sought after successful private investigators, having worked in the investigation &…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchBrisbane City, AustraliaHQ recorded Nov 6, 202611-5035 contacts →

Exact match

“Comtrac’s AI-assisted investigation management system streamlines casework, allowing you to map exhibits to the key elements of an offence or breach and quickly generate briefs of…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchMelbourne, AustraliaHQ recorded Nov 6, 202651-20030 contacts →

Exact match

“Experts in workplace behaviour investigations, factual investigations (personal injuries) and litigation support.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchPort Melbourne, AustraliaHQ recorded Nov 6, 202651-20029 contacts →

Exact match

“The SureFact Group P/L is a privately owned Investigation’s Company providing tailored solutions to Insurance Companies, Large Corporate Organisations, Small to Medium Employers…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchCanberra, AustraliaHQ recorded Nov 6, 202611-5029 contacts →

Exact match

“Condor (by Distillery Software) is a specialised enterprise-grade investigation and intelligence management solution for government agencies and the private sector in Australia…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchBrisbane, AustraliaHQ recorded Nov 6, 202611-5027 contacts →

Exact match

“We are one of Australia’s largest and most experienced independent firms exclusively dedicated to the conduct of respectful and rigorous workplace investigation services that meet…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchBlackburn North, AustraliaHQ recorded Nov 6, 202651-20023 contacts →

Exact match

“At Oracle Investigation Services, our aptitude is one of expertise, integrity and pursuit of the truth.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchSilverwater, AustraliaHQ recorded Nov 6, 202651-20011 contacts →

Exact match

“Australian Investigation Security Management (AISM) is an Australian leader in legal investigations, security and technology services with a single-minded focus on quality…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchSydney, AustraliaHQ recorded Nov 6, 20261-1010 contacts →

Exact match

“At CurbyMcLintock, we utilise the skills of our multidisciplinary team of investigators, forensic technologists, forensic accountants and data analysts to help our clients find a…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchToowong, AustraliaHQ recorded Nov 6, 202611-507 contacts →

Exact match

“Sharmans Investigations and Process Serving “Sharmans” are a member of the Sharmans (Australia) group of businesses, providing strategic Investigation and Legal Support Services…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchMelbourne, AustraliaHQ recorded Nov 6, 202611-507 contacts →

Exact match

“Asia Pacific Security Group (APSG) is a privately owned investigations and security firm providing specialised services to Government, corporate and private clients.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchAdelaide, AustraliaHQ recorded Nov 6, 202611-506 contacts →

Exact match

“Henderson Horrocks is a proudly SA owned and operated Investigations Firm.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchSydney, AustraliaHQ recorded Nov 6, 202611-505 contacts →

Exact match

“Worksite are a diverse investigative team with extensive experience in private investigations, specialising across multiple areas including workers’ compensation claims, public…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchBrisbane, AustraliaHQ recorded Nov 6, 20261-105 contacts →

Exact match

“Established in 1961, the Institute of Mercantile Agents Limited (IMA) represents collectors, investigators and field agents (process servers and field call agents) throughout…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchSydney, AustraliaHQ recorded Nov 6, 20261-105 contacts →

Exact match

“Nemesis Consultancy Group, founded in 2008, is an Australian-owned firm specialising in workplace and specialist investigations, surveillance, online investigations and hostile…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchDeakin, AustraliaHQ recorded Nov 6, 202611-504 contacts →

Exact match

“CPM Reviews specialises in conducting workplace investigations.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchBerwick, AustraliaHQ recorded Nov 6, 20261-104 contacts →

Exact match

“At Proof Integrity Solutions we pride ourselves on providing clients with efficient, high quality and professional services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchMelbourne, AustraliaHQ recorded Nov 6, 202611-504 contacts →

Exact match

“Precise Investigation is a leading Private Investigation firm that has faithfully served Australian businesses, families and individuals for over 30 years.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchDrummoyne, AustraliaHQ recorded Nov 6, 20261-104 contacts →

Exact match

“A Trusted Forensic Investigator Firm When you need proof beyond doubt, you can rely on Lyonswood Investigations and Forensics Group, a professional and government-licensed private…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchBrisbane City, AustraliaHQ recorded Nov 6, 202611-504 contacts →

Exact match

“ICETS is a registered training organisation (RTO 31398) who specialises in nationally recognised investigation course programs that integrate the legislation, policy & procedures…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 24 of 161 investigation agencies based in Australia

See the full list, filter by size, metro and specialty, and access 458 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Investigation agencies based in Australia at a glance

As of Nov 6, 2026
35.4%Verified-email coverage
8.0Average contacts per company
1-10Median size (employees)
17.4%Largest-city concentration · Sydney
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
94
11-50
41
51-200
17
201-500
4

Email recency for this list is measured worldwide rather than for Australia, so it is reported there. Company counts and contact totals on this page are exact for Australia, over 161 companies.

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.
What qualifies
Company records associated with Australia whose business descriptions match “investigation agencies” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 458 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 November 6, 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.

Investigation agencies by metro

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 “investigation agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many investigation agencies are there based in Australia?

RevenueBase identified 161 company matches for investigation agencies associated with Australia as of November 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?

Risk & Security Management tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most investigation agencies?

Sydney leads with 28 company records, followed by Melbourne (27) and Adelaide (8).

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 458 professional contacts with verified work emails tracked across these 161 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 November 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.