Company lists · Data refreshed September 2026

Top 25 Investigative research firms based in Australia

Name: Investigative research 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 93 companies tracked

RevenueBase identified 93 investigative research firms headquartered in Australia as of September 2026 and tracks 693 professional contacts across them, including 286 with verified work emails. Sydney is the largest hub.

This list covers investigative research 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

93Companies

693Contacts tracked

286Verified emails

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The 25 largest investigative research firms based in Australia

Ranked by team size

Top 25 of 93 investigative research 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 investigative research 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	Partial evidence	Brisbane Cbd, AustraliaHQ checked Sep 20, 2026	51-200	83 contacts →
	Partial 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	Taverner Research Group	Partial evidence	Surry Hills, AustraliaHQ checked Sep 20, 2026	11-50	55 contacts →
	Partial evidence “Taverner Research is a full service customised market and social research provider specialising in both commercial and government work.” Source: RevenueBase Database · checked Sep 20, 2026
4	Brooksight Investigations	Partial evidence	Gold Coast, AustraliaHQ checked Sep 20, 2026	51-200	39 contacts →
	Partial evidence “Brooksight Investigations are one of the most respected investigation teams operating throughout Australia.” Source: RevenueBase Database · checked Sep 20, 2026
5	Detective Services DS	Partial evidence	South Melbourne, AustraliaHQ checked Sep 20, 2026	n/a	38 contacts →
	Partial 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	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	51-200	37 contacts →
	Partial 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	Clarity Workplace Solutions	Partial evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	51-200	32 contacts →
	Partial evidence “Experts in workplace behaviour investigations, factual investigations (personal injuries) and litigation support.” Source: RevenueBase Database · checked Sep 20, 2026
8	The Surefact Group	Partial evidence	Port Melbourne, AustraliaHQ checked Sep 20, 2026	51-200	29 contacts →
	Partial 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
9	Q Workplace Solutions PTY LTD	Partial evidence	Brisbane, AustraliaHQ checked Sep 20, 2026	11-50	24 contacts →
	Partial 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
10	Crnrstone	Indirect evidence	Waterloo, AustraliaHQ checked Sep 20, 2026	11-50	18 contacts →
	Indirect evidence “CRNRSTONE has been acquired by Pureprofile.” Source: RevenueBase Database · checked Sep 20, 2026
11	The Market Intelligence CO	Partial evidence	Alexandria, AustraliaHQ checked Sep 20, 2026	11-50	17 contacts →
	Partial evidence “The Market Intelligence Co.(TMIC) specialises in customised business to business and industrial market research.” Source: RevenueBase Database · checked Sep 20, 2026
12	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
13	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
14	Peoplecheck PTY LTD	Indirect evidence	Boolaroo, AustraliaHQ checked Sep 20, 2026	11-50	10 contacts →
	Indirect evidence “PeopleCheck is a team of background checking professionals that provide independent, premium, customised background checking solutions for clients across various industries.” Source: RevenueBase Database · checked Sep 20, 2026
15	Asia Pacific Security Group	Partial evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	11-50	7 contacts →
	Partial 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
16	CHS Investigations	Partial evidence	Ringwood, AustraliaHQ checked Sep 20, 2026	1-10	7 contacts →
	Partial evidence “CHS Investigations is an established corporate investigation company operating nationally with our head office in Victoria.” Source: RevenueBase Database · checked Sep 20, 2026
17	Sharmans Investigations And Process Serving	Partial evidence	Toowong, AustraliaHQ checked Sep 20, 2026	11-50	6 contacts →
	Partial evidence “Sharmans Investigations and Process Serving “Sharmans” are a member of the Sharmans (Australia) group of businesses, providing strategic Investigation and Legal Support Services…” Source: RevenueBase Database · checked Sep 20, 2026
18	Henderson Horrocks Risk Services	Partial evidence	Adelaide, AustraliaHQ checked Sep 20, 2026	11-50	6 contacts →
	Partial evidence “Henderson Horrocks is a proudly SA owned and operated Investigations Firm.” Source: RevenueBase Database · checked Sep 20, 2026
19	Worksite Investigations	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	5 contacts →
	Partial evidence “Worksite are a diverse investigative team with extensive experience in private investigations, specialising across multiple areas including workers’ compensation claims, public…” Source: RevenueBase Database · checked Sep 20, 2026
20	AIS International Criminal Screening Group	Partial evidence	Surfers Paradise, AustraliaHQ checked Sep 20, 2026	11-50	5 contacts →
	Partial evidence “Our Criminal Screening Services combine the very best in investigative screening resources with specialised vetting processes and system security to limit the risk to your…” Source: RevenueBase Database · checked Sep 20, 2026
21	Precise Investigation Corporate Risk & Investigation Services	Partial evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	11-50	4 contacts →
	Partial 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
22	Lyonswood Investigations & Forensics	Partial evidence	Drummoyne, AustraliaHQ checked Sep 20, 2026	1-10	4 contacts →
	Partial 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
23	Nemesis Consultancy Group	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	1-10	4 contacts →
	Partial evidence “Nemesis Consultancy Group, founded in 2008, is an Australian-owned firm specialising in workplace and specialist investigations, surveillance, online investigations and hostile…” Source: RevenueBase Database · checked Sep 20, 2026
24	Interview Management Solutions	Partial evidence	Balgowlah, AustraliaHQ checked Sep 20, 2026	1-10	3 contacts →
	Partial 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
25	Investigative Services Group	Partial evidence	Oran Park, AustraliaHQ checked Sep 20, 2026	11-50	3 contacts →
	Partial 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

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 research 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 investigative research firms.
Partial evidence: Its own public description names part of investigative research firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name investigative research 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 25 of 93 investigative research firms based in Australia

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Investigative research firms based in Australia at a glance

As of Sep 20, 2026

41.3%Verified-email coverage

7.5Average contacts per company

1-10Median size (employees)

18.3%Largest-city concentration · Sydney

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

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 93 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 research 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 “investigative research 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 investigative research 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 investigative research 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, 286 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 research 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 investigative research firms are there based in Australia?

RevenueBase identified 93 investigative research 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 investigative research firms?

Sydney leads with 17 headquartered companies, followed by Melbourne (13) 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 286 verified decision-maker contacts tracked across these 93 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.