Company lists · Data refreshed September 2026

Top 25 Investigative agencies based in Australia

Name: Investigative agencies based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 95 companies tracked

RevenueBase identified 95 investigative agencies headquartered in 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 investigative agencies headquartered in Australia, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

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 investigative agencies based in Australia, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to investigative agencies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Risk & Security Management	Strong evidence	Brisbane Cbd, AustraliaHQ checked Sep 20, 2026	51-200	83 contacts →
	Strong evidence “With a history dating back to 1979, Risk & Security Management is Australia’s leading provider of mercantile and investigation services.” Source: RevenueBase Database · checked Sep 20, 2026
2	LKA Group	Indirect evidence	Carlton, AustraliaHQ checked Sep 20, 2026	51-200	59 contacts →
	Indirect evidence “For decades, LKA Group has provided the highest level of service to all clients, from small business to multinational corporations and governments.” Source: RevenueBase Database · checked Sep 20, 2026
3	Brooksight Investigations	Strong evidence	Gold Coast, AustraliaHQ checked Sep 20, 2026	51-200	39 contacts →
	Strong evidence “Brooksight Investigations are one of the most respected investigation teams operating throughout Australia.” Source: RevenueBase Database · checked Sep 20, 2026
4	Detective Services DS	Strong evidence	South Melbourne, AustraliaHQ checked Sep 20, 2026	n/a	38 contacts →
	Strong evidence “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 &…” Source: RevenueBase Database · checked Sep 20, 2026
5	Comtrac	Strong evidence	Brisbane City, AustraliaHQ checked Sep 20, 2026	11-50	34 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
6	The Surefact Group	Strong evidence	Port Melbourne, AustraliaHQ checked Sep 20, 2026	51-200	29 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
7	Q Workplace Solutions PTY LTD	Strong evidence	Brisbane, AustraliaHQ checked Sep 20, 2026	11-50	24 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
8	Asia Pacific Security Group	Strong evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	11-50	7 contacts →
	Strong evidence “Asia Pacific Security Group (APSG) is a privately owned investigations and security firm providing specialised services to Government, corporate and private clients.” Source: RevenueBase Database · checked Sep 20, 2026
9	CHS Investigations	Strong evidence	Ringwood, AustraliaHQ checked Sep 20, 2026	1-10	7 contacts →
	Strong evidence “CHS Investigations is an established corporate investigation company operating nationally with our head office in Victoria.” Source: RevenueBase Database · checked Sep 20, 2026
10	Institute Of Mercantile Agents IMA	Indirect evidence	Brisbane, AustraliaHQ checked Sep 20, 2026	1-10	5 contacts →
	Indirect evidence “Established in 1961, the Institute of Mercantile Agents Limited (IMA) represents collectors, investigators and field agents (process servers and field call agents) throughout…” Source: RevenueBase Database · checked Sep 20, 2026
11	Precise Investigation Corporate Risk & Investigation Services	Strong evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	11-50	4 contacts →
	Strong evidence “Precise Investigation is a leading Private Investigation firm that has faithfully served Australian businesses, families and individuals for over 30 years.” Source: RevenueBase Database · checked Sep 20, 2026
12	Lyonswood Investigations & Forensics	Strong evidence	Drummoyne, AustraliaHQ checked Sep 20, 2026	1-10	4 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
13	Interview Management Solutions	Strong evidence	Balgowlah, AustraliaHQ checked Sep 20, 2026	1-10	3 contacts →
	Strong evidence “IMS is a global investigations consulting & technology services company committed to robust investigation services and to helping clients to develop their investigative…” Source: RevenueBase Database · checked Sep 20, 2026
14	Investigative Services Group	Strong evidence	Oran Park, AustraliaHQ checked Sep 20, 2026	11-50	3 contacts →
	Strong evidence “At Investigative Services Group (ISG), we deliver high-quality factual investigations for insurers, legal professionals, and government panels across Australia.” Source: RevenueBase Database · checked Sep 20, 2026
15	Adelaide Security & Investigations	Strong evidence	Adelaide, AustraliaHQ checked Sep 20, 2026	1-10	3 contacts →
	Strong evidence “Adelaide Security & Investigations (ASI) is a local business established in 2013.” Source: RevenueBase Database · checked Sep 20, 2026
16	Ramsey Investigation Services	Strong evidence	Adelaide, AustraliaHQ checked Sep 20, 2026	11-50	2 contacts →
	Strong evidence “Ramsey Investigation Services is an investigation company operating out of Adelaide, Australia.” Source: RevenueBase Database · checked Sep 20, 2026
17	Acclivity Lexidra	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	1-10	2 contacts →
	Indirect evidence “For discerning clients requiring comprehensive solutions, Acclivity Lexidra stands apart.” Source: RevenueBase Database · checked Sep 20, 2026
18	Skiptracing Australia PTY LTD	Strong evidence	Brisbane, AustraliaHQ checked Sep 20, 2026	1-10	2 contacts →
	Strong evidence “Skip Tracing Australia delivers expert investigative services to law firms, liquidators, and corporate professionals across Australia.” Source: RevenueBase Database · checked Sep 20, 2026
19	Verifact Investigations	Strong evidence	Brisbane, AustraliaHQ checked Sep 20, 2026	51-200	2 contacts →
	Strong evidence “Verifact Investigations specialises in commercial investigations.” Source: RevenueBase Database · checked Sep 20, 2026
20	In Depth Investigations	Indirect evidence	Perth, AustraliaHQ checked Sep 20, 2026	11-50	2 contacts →
	Indirect evidence “Modern but traditional; discreet but results driven;"creative" but legal.” Source: RevenueBase Database · checked Sep 20, 2026
21	Brosnans Investigation Services	Strong evidence	East Sydney, AustraliaHQ checked Sep 20, 2026	11-50	2 contacts →
	Strong evidence “About Us Brosnans Investigation Services is a highly successful corporate investigations firm with more than 30 years experience.” Source: RevenueBase Database · checked Sep 20, 2026
22	Forensys	Strong evidence	Canberra, AustraliaHQ checked Sep 20, 2026	1-10	2 contacts →
	Strong evidence “ForenSys is a specialist forensic and investigative capability advisory firm helping governments, law enforcement, border agencies, and private industry to design, implement, and…” Source: RevenueBase Database · checked Sep 20, 2026
23	CPM Reviews PTY LTD	Strong evidence	Deakin, AustraliaHQ checked Sep 20, 2026	11-50	1 contacts →
	Strong evidence “CPM Reviews specialises in conducting workplace investigations.” Source: RevenueBase Database · checked Sep 20, 2026
24	Independent Investigations	Strong evidence	Geelong, AustraliaHQ checked Sep 20, 2026	1-10	1 contacts →
	Strong evidence “We undertake independent, workplace investigations into matters relating to - Bullying, Sexual Harassment, Misconduct and Fraud.” Source: RevenueBase Database · checked Sep 20, 2026
25	Cplm Investigations	Strong evidence	Kew, AustraliaHQ checked Sep 20, 2026	1-10	1 contacts →
	Strong evidence “CPLM Investigations are known for getting the job done.” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: investigative agencies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names investigative agencies.
Partial evidence: Its own public description names part of investigative agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name investigative agencies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 95 investigative agencies based in Australia

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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

11-50

51-200

201-500

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

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among investigative agencies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Australia whose own description of what they do matches “investigative agencies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names investigative agencies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among investigative agencies, and records with no verified work email. Companies headquartered outside Australia are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 436 across the full list. 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.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names investigative agencies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many investigative agencies are there based in Australia?

RevenueBase identified 95 investigative agencies headquartered in Australia as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Risk & Security Management, headquartered in Brisbane Cbd, tops this list with the largest team on record.

Which city has the most investigative agencies?

Melbourne leads with 19 headquartered companies, 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 the top results, verified emails and direct dials included. Upgrading unlocks all 436 verified decision-maker contacts tracked across these 95 companies.

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 Smart Search, 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.