Company lists · Data refreshed September 2026

Top 25 Big IT consulting firms based in Australia

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

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 2,537 companies tracked

RevenueBase identified 2,537 big IT consulting firms headquartered in Australia as of September 2026 and tracks 32,704 professional contacts across them, including 11,992 with verified work emails and 2,072 with mobile numbers. Sydney is the largest hub.

This list covers big IT consulting 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 23, 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 23, 2026 86% judged on-target in blind review

2,537Companies

32,704Contacts tracked

11,992Verified emails

2,072Mobile numbers

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The 25 largest big IT consulting firms based in Australia

Ranked by team size

Top 25 of 2,537 big IT consulting firms based in Australia, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to big IT consulting 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	Accenture Australia	Indirect evidence	Melbourne Vic, AustraliaHQ checked Sep 23, 2026	10001+	2,146 contacts →
	Indirect evidence “Accenture is a leading global professional services company that helps the world’s leading businesses, governments and other organisations build their digital core, optimise their…” Source: RevenueBase Database · checked Sep 23, 2026
2	NCS Group Australia	Indirect evidence	Sydney, AustraliaHQ checked Sep 23, 2026	1,001-5,000	802 contacts →
	Indirect evidence “NCS in Australia is reinventing technology services from the inside out.” Source: RevenueBase Database · checked Sep 23, 2026
3	Atturra	Partial evidence	Sydney, AustraliaHQ checked Sep 23, 2026	1,001-5,000	801 contacts →
	Partial evidence “Atturra (ASX: ATA) is one of Australia's leading advisory and IT solutions providers, focused on providing end-to-end transformation services to its clients.” Source: RevenueBase Database · checked Sep 23, 2026
4	Nexon Asia Pacific	Partial evidence	Sydney, AustraliaHQ checked Sep 23, 2026	501-1,000	777 contacts →
	Partial evidence “Nexon Asia Pacific (Nexon) is an award-winning digital consulting and managed services partner for mid-market, enterprise, and government organisations across Australia.” Source: RevenueBase Database · checked Sep 23, 2026
5	NRI Australia & NEW Zealand	Partial evidence	Sydney, AustraliaHQ checked Sep 23, 2026	1,001-5,000	711 contacts →
	Partial evidence “As a trusted end-to-end digital partner, we design, build, and manage IT solutions that turn bold visions into reality and set new standards of excellence for our clients.” Source: RevenueBase Database · checked Sep 23, 2026
6	Axiom Technologies	Partial evidence	Melbourne, AustraliaHQ checked Sep 23, 2026	1,001-5,000	552 contacts →
	Partial evidence “Axiom Technologies was founded to meet technological needs for Australia's medium & large scale enterprises providing end to end IT solution which delivers tailored solutions…” Source: RevenueBase Database · checked Sep 23, 2026
7	Synergy Group	Partial evidence	Canberra, AustraliaHQ checked Sep 23, 2026	201-500	425 contacts →
	Partial evidence “Challengers at heart, we are pragmatic explorers seeking to uncover what could be, so it can be.” Source: RevenueBase Database · checked Sep 23, 2026
8	Hcltech	Indirect evidence	North Sydney, AustraliaHQ checked Sep 23, 2026	10001+	369 contacts →
	Indirect evidence “HCLTech is a global technology company, home to more than 226,600 people across 60 countries, delivering industry-leading capabilities centred around AI, digital, engineering…” Source: RevenueBase Database · checked Sep 23, 2026
9	Ac3	Indirect evidence	Haymarket, AustraliaHQ checked Sep 23, 2026	201-500	365 contacts →
	Indirect evidence “AC3 is a leading Australian-owned and operated technology services provider helping organisations across government, healthcare, financial services, and critical infrastructure…” Source: RevenueBase Database · checked Sep 23, 2026
10	DXC Technology	Indirect evidence	Macquarie Park, AustraliaHQ checked Sep 23, 2026	10001+	360 contacts →
	Indirect evidence “DXC Technology (NYSE: DXC) is a leading enterprise technology and innovation partner delivering software, services, and solutions to global enterprises and public sector…” Source: RevenueBase Database · checked Sep 23, 2026
11	INK IT Solutions	Indirect evidence	Melbourne, AustraliaHQ checked Sep 23, 2026	201-500	331 contacts →
	Indirect evidence “Most SAP partners sell implementations.” Source: RevenueBase Database · checked Sep 23, 2026
12	Davidson	Indirect evidence	Brisbane City, AustraliaHQ checked Sep 23, 2026	501-1,000	305 contacts →
	Indirect evidence “As a proudly Australian company, over 30 years Davidson has evolved into a leader in enhancing workplace performance.” Source: RevenueBase Database · checked Sep 23, 2026
13	Silicon Stack	Indirect evidence	Richmond, AustraliaHQ checked Sep 23, 2026	201-500	262 contacts →
	Indirect evidence “Silicon Stack® is a rapidly expanding Australian enterprise headquartered in Melbourne, with an extensive clientele spanning Australia, NZ, Europe, North America, and Asia.” Source: RevenueBase Database · checked Sep 23, 2026
14	Finity	Indirect evidence	The Rocks, AustraliaHQ checked Sep 23, 2026	201-500	253 contacts →
	Indirect evidence “We are a trusted partner of tech start-ups through to large scale organisations.” Source: RevenueBase Database · checked Sep 23, 2026
15	Fujifilm Microchannel	Indirect evidence	North Sydney, AustraliaHQ checked Sep 23, 2026	201-500	235 contacts →
	Indirect evidence “FUJIFILM MicroChannel is an award-winning business technology solutions provider Empowering 1400+ customers to Innovate Better across Australia, New Zealand, Fiji, Singapore and…” Source: RevenueBase Database · checked Sep 23, 2026
16	Terra Firma Business Consulting	Indirect evidence	Melbourne, AustraliaHQ checked Sep 23, 2026	201-500	235 contacts →
	Indirect evidence “At Terra Firma, we understand that success is all about sustaining long-term relationships.” Source: RevenueBase Database · checked Sep 23, 2026
17	Professional Advantage	Indirect evidence	124 Walker Street, AustraliaHQ checked Sep 23, 2026	201-500	234 contacts →
	Indirect evidence “Helping organisations achieve more with technology.” Source: RevenueBase Database · checked Sep 23, 2026
18	DB Results	Partial evidence	Melbourne, AustraliaHQ checked Sep 23, 2026	201-500	224 contacts →
	Partial evidence “DB Results is a profit-for-purpose digital business consulting and technology company.” Source: RevenueBase Database · checked Sep 23, 2026
19	The Missing Link	Indirect evidence	North Sydney, AustraliaHQ checked Sep 23, 2026	201-500	222 contacts →
	Indirect evidence “For over 28 years, The Missing Link has been a trusted technology partner to enterprise, government and high-growth businesses across Australia.” Source: RevenueBase Database · checked Sep 23, 2026
20	UNICO	Indirect evidence	Melbourne, AustraliaHQ checked Sep 23, 2026	51-200	215 contacts →
	Indirect evidence “Unico is an Australian privately owned and operated technology services company making technology innovation simple.” Source: RevenueBase Database · checked Sep 23, 2026
21	Serole Technologies	Partial evidence	Sydney, AustraliaHQ checked Sep 23, 2026	201-500	190 contacts →
	Partial evidence “Serole Technologies is a leading provider of end-to-end IT services and solutions for Large Enterprises to Small to Medium companies.” Source: RevenueBase Database · checked Sep 23, 2026
22	Seisma	Indirect evidence	Melbourne, AustraliaHQ checked Sep 23, 2026	501-1,000	185 contacts →
	Indirect evidence “We make technology work for people, not the other way around.” Source: RevenueBase Database · checked Sep 23, 2026
23	Barhead, An Akkodis Company	Partial evidence	Sydney, AustraliaHQ checked Sep 23, 2026	10001+	177 contacts →
	Partial evidence “Barhead, an Akkodis company, is an award-winning consulting firm focused on leveraging Microsoft’s Technology Stack to deliver business solutions.” Source: RevenueBase Database · checked Sep 23, 2026
24	Intuit Technologies	Partial evidence	Hobart, AustraliaHQ checked Sep 23, 2026	51-200	172 contacts →
	Partial evidence “Intuit Technologies is a Tasmanian-owned national IT services provider, with offices across Tasmania, Victoria, and Queensland.” Source: RevenueBase Database · checked Sep 23, 2026
25	Protiviti Australia	Partial evidence	Melbourne, AustraliaHQ checked Sep 23, 2026	5,001-10,000	172 contacts →
	Partial evidence “Protiviti is a global business consulting firm that delivers deep expertise, objective insights, a tailored approach and unparalleled collaboration to help leaders confidently…” Source: RevenueBase Database · checked Sep 23, 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: big IT consulting 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 big IT consulting firms.
Partial evidence: Its own public description names part of big IT consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name big IT consulting 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 2,537 big IT consulting firms based in Australia

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Big IT consulting firms based in Australia at a glance

As of Sep 23, 2026

36.7%Verified-email coverage

6.3%Mobile-number coverage

12.9Average contacts per company

1-10Median size (employees)

20.8%Largest-city concentration · Sydney

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

1,483

11-50

760

51-200

207

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 25.0d

9,0890–30

2,68331–60

14161–90

490–180

75180+

Company record updated

Median 86.0d

00–30

2,95531–60

16,86361–90

10,94890–180

1,938180+

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 big IT consulting 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 “big IT consulting 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 big IT consulting 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 big IT consulting 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, 11,992 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 23, 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.

Big IT consulting firms by metro

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 big IT consulting 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 big IT consulting firms are there based in Australia?

RevenueBase identified 2,537 big IT consulting 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?

Accenture Australia, headquartered in Melbourne, tops this list with the largest team on record.

Which city has the most big IT consulting firms?

Sydney leads with 528 headquartered companies, followed by Melbourne (509) and Brisbane (144).

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 11,992 verified decision-maker contacts tracked across these 2,537 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 23, 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.