Company lists · Data refreshed September 2026

Top 25 Legacy system modernization firms based in Australia

Name: Legacy system modernization 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 607 companies tracked

RevenueBase identified 607 legacy system modernization firms headquartered in Australia as of September 2026 and tracks 11,868 professional contacts across them, including 3,674 with verified work emails. Melbourne is the largest hub.

This list covers legacy system modernization 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

607Companies

11,868Contacts tracked

3,674Verified emails

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The 25 largest legacy system modernization firms based in Australia

Ranked by team size

Top 25 of 607 legacy system modernization 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 legacy system modernization 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	Fujifilm Business Innovation Australia	Indirect evidence	Macquarie Park, AustraliaHQ checked Sep 20, 2026	1,001-5,000	2,299 contacts →
	Indirect evidence “At FUJIFILM Business Innovation Australia, we collaborate with customers to solve their most challenging problems with cutting-edge research and innovative technologies.” Source: RevenueBase Database · checked Sep 20, 2026
2	Accenture Australia	Indirect evidence	Melbourne Vic, AustraliaHQ checked Sep 20, 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 20, 2026
3	NRI Australia & NEW Zealand	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	1,001-5,000	711 contacts →
	Indirect 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 20, 2026
4	DXC Technology	Indirect evidence	Macquarie Park, AustraliaHQ checked Sep 20, 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 20, 2026
5	INK IT Solutions	Indirect evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	201-500	331 contacts →
	Indirect evidence “Most SAP partners sell implementations.” Source: RevenueBase Database · checked Sep 20, 2026
6	Adactin	Indirect evidence	Parramatta, AustraliaHQ checked Sep 20, 2026	201-500	221 contacts →
	Indirect evidence “At Adactin, we are a next-generation technology services provider delivering end-to-end digital transformation through deep expertise in Microsoft and AWS ecosystems, AI-powered…” Source: RevenueBase Database · checked Sep 20, 2026
7	Barhead, An Akkodis Company	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	10001+	177 contacts →
	Indirect 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 20, 2026
8	ADAPS	Indirect evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	201-500	156 contacts →
	Indirect evidence “Adaps is Australia’s oldest privately owned IT services company.” Source: RevenueBase Database · checked Sep 20, 2026
9	CPT Global	Indirect evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	51-200	154 contacts →
	Indirect evidence “CPT Global is your independent partner for achieving peak IT performance.” Source: RevenueBase Database · checked Sep 20, 2026
10	blackbook.ai	Indirect evidence	Brisbane City, AustraliaHQ checked Sep 20, 2026	51-200	142 contacts →
	Indirect evidence “Blackbook AI is a global technology consulting company specialising in AI, automation, data, and digital development.” Source: RevenueBase Database · checked Sep 20, 2026
11	Iotasol Product Engineering & Modernization Company	Indirect evidence	Docklands, AustraliaHQ checked Sep 20, 2026	51-200	141 contacts →
	Indirect evidence “Welcome to iotasol, your premier partner in modernizing product solutions across diverse industries.” Source: RevenueBase Database · checked Sep 20, 2026
12	Gibson Quai International GQI	Indirect evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	51-200	113 contacts →
	Indirect evidence “Your Trusted Partner in Digital Transformation and Communications Technology 30 Years of Innovation And Expertise GQI has been a trusted advisor and professional services provider…” Source: RevenueBase Database · checked Sep 20, 2026
13	Insighture	Indirect evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	51-200	108 contacts →
	Indirect evidence “Insighture is a multi-disciplinary technology consulting company based in Melbourne, Australia and Colombo, Sri Lanka.” Source: RevenueBase Database · checked Sep 20, 2026
14	Optimal Transnational Pty. LTD	Indirect evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	501-1,000	98 contacts →
	Indirect evidence “Optimal Virtual Employee is a rapidly growing IT consultancy.” Source: RevenueBase Database · checked Sep 20, 2026
15	DIUS	Indirect evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	51-200	91 contacts →
	Indirect evidence “It’s our ability to help clients navigate the new that continues to set us apart.” Source: RevenueBase Database · checked Sep 20, 2026
16	Wild Tech	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	51-200	77 contacts →
	Indirect evidence “With real-world experience, a global team, and the trust of local clients, we’re the end-to-end technology partner businesses rely on to turn bold ideas into powerful results.” Source: RevenueBase Database · checked Sep 20, 2026
17	SOCO	Indirect evidence	Brisbane, AustraliaHQ checked Sep 20, 2026	51-200	69 contacts →
	Indirect evidence “SOCO (ASX:SOC) is a multi-award-winning IT consultancy specialising in the delivery of digital solutions, business applications and integration projects.” Source: RevenueBase Database · checked Sep 20, 2026
18	DNX Solutions	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	51-200	66 contacts →
	Indirect evidence “DNX is an Australian modernisation transformation partner and trusted advisor helping organisations evolve with clarity and confidence.” Source: RevenueBase Database · checked Sep 20, 2026
19	Bailey Abbott	Indirect evidence	Unley, AustraliaHQ checked Sep 20, 2026	51-200	63 contacts →
	Indirect evidence “We’re a digital transformation and business improvement consultancy that brings amazing people together to explore the art of possible.” Source: RevenueBase Database · checked Sep 20, 2026
20	Gowide Solutions	Indirect evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	51-200	63 contacts →
	Indirect evidence “Enterprises are spending too much on digital delivery and getting too little in return.” Source: RevenueBase Database · checked Sep 20, 2026
21	Leonardo	Indirect evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	51-200	59 contacts →
	Indirect evidence “Leonardo, a UST company, operates in the Australia and New Zealand region.” Source: RevenueBase Database · checked Sep 20, 2026
22	Onsys Technologies	Indirect evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	11-50	58 contacts →
	Indirect evidence “Onsys Technologies is a Melbourne-based IT services and consulting company delivering intelligent, scalable, and cost-effective technology solutions to businesses across Australia…” Source: RevenueBase Database · checked Sep 20, 2026
23	DB Results Philippines	Indirect evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	201-500	56 contacts →
	Indirect evidence “DB Results Philippines Inc.” Source: RevenueBase Database · checked Sep 20, 2026
24	NUKON	Indirect evidence	Southbank, AustraliaHQ checked Sep 20, 2026	11-50	53 contacts →
	Indirect evidence “Nukon is a digital transformation consulting and delivery company that works to bring the worlds of operational technology and information technology together.” Source: RevenueBase Database · checked Sep 20, 2026
25	ISOFT	Indirect evidence	Bella Vista, AustraliaHQ checked Sep 20, 2026	501-1,000	53 contacts →
	Indirect evidence “With 24+ years of excellence, iSOFT is a trusted partner in digital transformation, delivering over projects for 500+ clients, including Fortune 500 companies, 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: legacy system modernization 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 legacy system modernization firms.
Partial evidence: Its own public description names part of legacy system modernization firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name legacy system modernization 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 607 legacy system modernization firms based in Australia

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Legacy system modernization firms based in Australia at a glance

As of Sep 20, 2026

31.0%Verified-email coverage

19.6Average contacts per company

1-10Median size (employees)

23.9%Largest-city concentration · Melbourne

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

314

11-50

195

51-200

201-500

501-1,000

1,001-5,000

10001+

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 607 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 legacy system modernization 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 “legacy system modernization 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 legacy system modernization 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 legacy system modernization 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, 3,674 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.

Legacy system modernization 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 legacy system modernization 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 legacy system modernization firms are there based in Australia?

RevenueBase identified 607 legacy system modernization 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?

Fujifilm Business Innovation Australia, headquartered in Macquarie Park, tops this list with the largest team on record.

Which city has the most legacy system modernization firms?

Melbourne leads with 145 headquartered companies, followed by Sydney (134) and Brisbane (38).

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 3,674 verified decision-maker contacts tracked across these 607 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.