Company lists · Data verified August 2026

Top 25 Consulting firms based in Australia

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 8,292 companies tracked

There are 8,292 consulting firms headquartered in Australia (RevenueBase, August 2026). RevenueBase tracks 72,895 professional contacts across them, including 29,764 with verified work emails and 7,616 with mobile numbers. Sydney is the largest hub.

This list covers consulting firms headquartered in Australia, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

8,292Companies

72,895Contacts tracked

29,764Verified emails

7,616Mobile numbers

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The 25 largest consulting firms based in Australia

Ranked by team size

Top 25 of 8,292 consulting firms based in Australia, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Ey-Parthenon	Sydney	10001+	16,982	8,009
2	Rider Levett Bucknall RLB	Sydney	1,001-5,000	3,282	9
3	Nihilent	South Melbourne	1,001-5,000	1,722	575
4	Linesight	Melbourne	1,001-5,000	1,709	1,246
5	Lycopodium	Newcastle	1,001-5,000	1,132	636
6	Nous Group	Brisbane	501-1,000	697	531
7	Kordamentha	Townsville	501-1,000	601	402
8	Moore Australia	Monto	501-1,000	589	3
9	Mcgrathnicol	Sydney	201-500	509	409
10	Partners In Performance, Part Of Accenture	Brisbane	501-1,000	484	244
11	TTW	North Sydney	201-500	463	334
12	SW Accountants & Advisors	Perth	201-500	444	280
13	Acor Consultants	Darwin City	501-1,000	429	257
14	Synergy Group	Barton	201-500	421	249
15	Mercer Australia	Melbourne	1,001-5,000	411	230
16	MPI	Kalgoorlie	201-500	366	22
17	Clearsulting	Sydney	201-500	364	250
18	Bluerock	Melbourne	201-500	316	205
19	Davidson	Symonston	501-1,000	300	138
20	Finity	Melbourne	201-500	253	214
21	Terra Firma Business Consulting	Melbourne	201-500	232	92
22	PMY Group	Melbourne	201-500	197	97
23	Fiftyfive5, Part Of Accenture Song	Sydney	201-500	170	106
24	Partum Engineering	Hobart	201-500	150	87
25	HPX Group	Perth	201-500	72	53

Showing 25 of 8,292 consulting firms based in Australia

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Consulting firms based in Australia at a glance

As of Aug 28, 2026

1-10Median size (employees)

SydneyLargest hub · 1793 HQs

7,616Contacts with mobile numbers

189Emails re-verified in last 30 days

Companies by employee count

1-10

6,574

11-50

1,375

51-200

230

201-500

501-1,000

1,001-5,000

10001+

Consulting firms by metro

Metro	Companies
Consulting firms in Sydney	1793
Consulting firms in Melbourne	1558
Consulting firms in Brisbane	737
Consulting firms in Perth	470
Consulting firms in Adelaide	279
Consulting firms in Canberra	163
Consulting firms in Gold Coast	81

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “consulting firms”, with match quality audited by blind human judging, and headquartered in Australia.
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: Contact records re-verify on a rolling cadence; 189 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many consulting firms are there based in Australia?

There are 8,292 consulting firms headquartered in Australia as of August 2026 (RevenueBase).

What is the largest company on this list?

Ey-Parthenon, headquartered in Sydney, tops this list with the largest team on record.

Which city has the most consulting firms?

Sydney leads with 1793 headquartered companies, followed by Melbourne (1558) and Brisbane (737).

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 29,764 verified decision-maker contacts tracked across these 8,292 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.