Company lists · Data refreshed September 2026

Top 24 Investigation firms based in Australia

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 226 companies tracked

RevenueBase identified 226 investigation firms headquartered in Australia as of September 2026 and tracks 1,231 professional contacts across them, including 420 with verified work emails. Sydney is the largest hub.

This list covers investigation firms 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

226Companies

1,231Contacts tracked

420Verified emails

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The 24 largest investigation firms based in Australia

Ranked by team size

Top 24 of 226 investigation firms 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 investigation firms: 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	Credit Collection Services Group PTY LTD	Strong evidence	Sydney, AustraliaHQ checked Sep 20, 2026	51-200	38 contacts →
	Strong evidence “Credit Collection Services Group (CCSG) is a professional full service debt recovery, law firm and investigations company.” Source: RevenueBase Database · checked Sep 20, 2026
5	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
6	Quantumcorp Australia	Strong evidence	Sydney, AustraliaHQ checked Sep 20, 2026	51-200	37 contacts →
	Strong evidence “Quantumcorp provides a full range of investigation services to insurers, self-insurers, insurance lawyers, claims management companies, and large employers.” Source: RevenueBase Database · checked Sep 20, 2026
7	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
8	Fbis International	Indirect evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	51-200	33 contacts →
	Indirect evidence “FBIS International Issues Management Pty Ltd For the past 19 years FBIS International Issues Management has investigated and resolved business issues and threats with complete…” Source: RevenueBase Database · checked Sep 20, 2026
9	Clarity Workplace Solutions	Strong evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	51-200	32 contacts →
	Strong evidence “Experts in workplace behaviour investigations, factual investigations (personal injuries) and litigation support.” Source: RevenueBase Database · checked Sep 20, 2026
10	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
11	ANSIC	Strong evidence	Bowen Hills, AustraliaHQ checked Sep 20, 2026	51-200	29 contacts →
	Strong evidence “ANSIC is an Australian-based security, investigation & risk management firm, with recognised global capabilities and affiliates.” Source: RevenueBase Database · checked Sep 20, 2026
12	Worthington Clark	Indirect evidence	Bowral, AustraliaHQ checked Sep 20, 2026	11-50	28 contacts →
	Indirect evidence “Worthington Clark is a professional genealogy and asset research firm.” Source: RevenueBase Database · checked Sep 20, 2026
13	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
14	Condor By Distillery Software	Strong evidence	Canberra, AustraliaHQ checked Sep 20, 2026	11-50	21 contacts →
	Strong evidence “Condor (by Distillery Software) is a specialised enterprise-grade investigation and intelligence management solution for government agencies and the private sector in Australia…” Source: RevenueBase Database · checked Sep 20, 2026
15	Wise Mcgrath	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	51-200	15 contacts →
	Indirect evidence “Wise McGrath is a leading commercial services company which specialises in delivering an innovative range of integrated support services across industries where compliance and…” Source: RevenueBase Database · checked Sep 20, 2026
16	Nova Security Group	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	201-500	15 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
17	IFW Global	Strong evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	14 contacts →
	Strong evidence “IFW Global is an international private intelligence firm, specialising in cybercrime investigations, asset recovery and financial crime intelligence.” Source: RevenueBase Database · checked Sep 20, 2026
18	Curbymclintock PTY Limited	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	1-10	11 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
19	Duxton Hill	Indirect evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	1-10	11 contacts →
	Indirect evidence “We are Fraud, Corruption, Professional Misconduct & Financial Crime Specialists.” Source: RevenueBase Database · checked Sep 20, 2026
20	Fire Forensics PTY LTD	Strong evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	10 contacts →
	Strong evidence “We at Fire Forensics are the leading experts in fire and explosion investigation in Australia and abroad.” Source: RevenueBase Database · checked Sep 20, 2026
21	AISM	Strong evidence	Silverwater, AustraliaHQ checked Sep 20, 2026	51-200	10 contacts →
	Strong evidence “Australian Investigation Security Management (AISM) is an Australian leader in legal investigations, security and technology services with a single-minded focus on quality…” Source: RevenueBase Database · checked Sep 20, 2026
22	Tawfik	Indirect evidence	Bundall, AustraliaHQ checked Sep 20, 2026	1-10	10 contacts →
	Indirect evidence “TAWFIK is a specialist materials & forensic engineering firm which has been retained by legal firms, government agencies, financiers, and insurers to investigate contentious…” Source: RevenueBase Database · checked Sep 20, 2026
23	Complete Corporate Services Australia	Strong evidence	Brisbane, AustraliaHQ checked Sep 20, 2026	1-10	8 contacts →
	Strong evidence “Complete Corporate Services is a specialist firm providing Risk Management, Investigation, Debt Collection & Creditor Management, and Insurance Investigation & Assessing services…” Source: RevenueBase Database · checked Sep 20, 2026
24	Cavalry Scout	Indirect evidence	Brisbane City, AustraliaHQ checked Sep 20, 2026	1-10	8 contacts →
	Indirect evidence “Revealed upon launch -)” 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: investigation firms. 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 investigation firms.
Partial evidence: Its own public description names part of investigation firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name investigation firms. 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 24 of 226 investigation firms based in Australia

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Investigation firms based in Australia at a glance

As of Sep 20, 2026

34.1%Verified-email coverage

5.4Average contacts per company

1-10Median size (employees)

16.4%Largest-city concentration · Sydney

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

154

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 226 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 investigation firms, 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 “investigation firms”. 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 investigation firms), 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 investigation firms, 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, 420 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.

Investigation firms by metro

Investigation firms in Sydney37
Investigation firms in Melbourne35

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 investigation firms, 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 investigation firms are there based in Australia?

RevenueBase identified 226 investigation firms 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 investigation firms?

Sydney leads with 37 headquartered companies, followed by Melbourne (35) and Perth (14).

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 420 verified decision-maker contacts tracked across these 226 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.