Company lists · Data refreshed September 2026

Top 25 Investigative agencies based in Australia

RevenueBase identified 95 company matches for investigative agencies associated with Australia as of September 2026 and tracks 1,107 professional contacts across them, including 436 with verified work emails. Melbourne is the largest hub.

This list covers company matches for investigative 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 September 20, 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 Sep 20, 2026 How this list was built
95Companies
1,107Contacts tracked
436Verified emails
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The 25 largest investigative agencies based in Australia

Ranked by team size
Top 25 of 95 company matches for investigative agencies based in Australia, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 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 Sep 20, 202651-20083 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 · Sep 20, 2026 · View company records in RevenueBase
2Exact matchCarlton, AustraliaHQ recorded Sep 20, 202651-20059 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 · Sep 20, 2026 · View company records in RevenueBase
3Exact matchGold Coast, AustraliaHQ recorded Sep 20, 202651-20039 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4Exact matchSouth Melbourne, AustraliaHQ recorded Sep 20, 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 · Sep 20, 2026 · View company records in RevenueBase
5Exact matchBrisbane City, AustraliaHQ recorded Sep 20, 202611-5034 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 · Sep 20, 2026 · View company records in RevenueBase
6Exact matchPort Melbourne, AustraliaHQ recorded Sep 20, 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 · Sep 20, 2026 · View company records in RevenueBase
7Exact matchBrisbane, AustraliaHQ recorded Sep 20, 202611-5024 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 · Sep 20, 2026 · View company records in RevenueBase
8Exact matchMelbourne, AustraliaHQ recorded Sep 20, 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 · Sep 20, 2026 · View company records in RevenueBase
9Exact matchRingwood, AustraliaHQ recorded Sep 20, 20261-107 contacts →

Exact match

“CHS Investigations is an established corporate investigation company operating nationally with our head office in Victoria.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10Exact matchBrisbane, AustraliaHQ recorded Sep 20, 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 · Sep 20, 2026 · View company records in RevenueBase
11Exact matchMelbourne, AustraliaHQ recorded Sep 20, 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 · Sep 20, 2026 · View company records in RevenueBase
12Exact matchDrummoyne, AustraliaHQ recorded Sep 20, 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 · Sep 20, 2026 · View company records in RevenueBase
13Exact matchBalgowlah, AustraliaHQ recorded Sep 20, 20261-103 contacts →

Exact match

“IMS is a global investigations consulting & technology services company committed to robust investigation services and to helping clients to develop their investigative…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14Exact matchOran Park, AustraliaHQ recorded Sep 20, 202611-503 contacts →

Exact match

“At Investigative Services Group (ISG), we deliver high-quality factual investigations for insurers, legal professionals, and government panels across Australia.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15Exact matchAdelaide, AustraliaHQ recorded Sep 20, 20261-103 contacts →

Exact match

“Adelaide Security & Investigations (ASI) is a local business established in 2013.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16Exact matchAdelaide, AustraliaHQ recorded Sep 20, 202611-502 contacts →

Exact match

“Ramsey Investigation Services is an investigation company operating out of Adelaide, Australia.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17Exact matchSydney, AustraliaHQ recorded Sep 20, 20261-102 contacts →

Exact match

“For discerning clients requiring comprehensive solutions, Acclivity Lexidra stands apart.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18Exact matchBrisbane, AustraliaHQ recorded Sep 20, 20261-102 contacts →

Exact match

“Skip Tracing Australia delivers expert investigative services to law firms, liquidators, and corporate professionals across Australia.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19Exact matchBrisbane, AustraliaHQ recorded Sep 20, 202651-2002 contacts →

Exact match

“Verifact Investigations specialises in commercial investigations.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20Exact matchPerth, AustraliaHQ recorded Sep 20, 202611-502 contacts →

Exact match

“Modern but traditional; discreet but results driven;"creative" but legal.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21Exact matchEast Sydney, AustraliaHQ recorded Sep 20, 202611-502 contacts →

Exact match

“About Us Brosnans Investigation Services is a highly successful corporate investigations firm with more than 30 years experience.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22Exact matchCanberra, AustraliaHQ recorded Sep 20, 20261-102 contacts →

Exact match

“ForenSys is a specialist forensic and investigative capability advisory firm helping governments, law enforcement, border agencies, and private industry to design, implement, and…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23Exact matchDeakin, AustraliaHQ recorded Sep 20, 202611-501 contacts →

Exact match

“CPM Reviews specialises in conducting workplace investigations.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24Exact matchGeelong, AustraliaHQ recorded Sep 20, 20261-101 contacts →

Exact match

“We undertake independent, workplace investigations into matters relating to - Bullying, Sexual Harassment, Misconduct and Fraud.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25Exact matchKew, AustraliaHQ recorded Sep 20, 20261-101 contacts →

Exact match

“CPLM Investigations are known for getting the job done.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

Showing 25 of 95 investigative agencies based in Australia

See the full list, filter by size, metro and specialty, and access 436 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Investigative agencies based in Australia at a glance

As of Sep 20, 2026
39.4%Verified-email coverage
11.7Average contacts per company
1-10Median size (employees)
20.0%Largest-city concentration · Melbourne
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
51
11-50
24
51-200
13
201-500
5

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 95 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 “investigative 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 436 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 20, 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.

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

How many investigative agencies are there based in Australia?

RevenueBase identified 95 company matches for investigative agencies associated with Australia 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?

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 investigative agencies?

Melbourne leads with 19 company records, followed by Sydney (12) and Brisbane (5).

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 436 professional contacts with verified work emails tracked across these 95 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 20, 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.