Company lists · Data refreshed September 2026

Top 25 Internal communications agencies based in Australia

Name: Internal communications agencies based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 496 companies tracked

RevenueBase identified 496 internal communications agencies headquartered in Australia as of September 2026 and tracks 6,148 professional contacts across them, including 2,150 with verified work emails. Sydney is the largest hub.

This list covers internal communications agencies 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

496Companies

6,148Contacts tracked

2,150Verified emails

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The 25 largest internal communications agencies based in Australia

Ranked by team size

Top 25 of 496 internal communications agencies 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 internal communications agencies: 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	Jimjam Ideas	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	n/a	621 contacts →
	Partial evidence “JIMJAM Ideas is an award winning integrated communications agency that believes CONNECTED IDEAS to be the key to powerful and transformative marketing.” Source: RevenueBase Database · checked Sep 20, 2026
2	OMD Australia	Partial evidence	South Eveleigh, AustraliaHQ checked Sep 20, 2026	501-1,000	523 contacts →
	Partial evidence “OMD Australia is proud to be part of the OMD global network, the world's largest leading marketing and communications agency.” Source: RevenueBase Database · checked Sep 20, 2026
3	SBM Marketing Communications	Partial evidence	Silverwater, AustraliaHQ checked Sep 20, 2026	51-200	147 contacts →
	Partial evidence “At SBM, we understand the power of marketing and effective communications.” Source: RevenueBase Database · checked Sep 20, 2026
4	Think HQ	Partial evidence	South Melbourne, AustraliaHQ checked Sep 20, 2026	51-200	108 contacts →
	Partial evidence “Jen Sharpe founded Think HQ in 2010, on the belief that communications can be harnessed as a force of positive impact.” Source: RevenueBase Database · checked Sep 20, 2026
5	EVH	Partial evidence	Darlinghurst, AustraliaHQ checked Sep 20, 2026	11-50	83 contacts →
	Partial evidence “Creative communications for established and emerging luxury, lifestyle, design, fashion and wellness brands An independent agency founded and based in Sydney with operations in…” Source: RevenueBase Database · checked Sep 20, 2026
6	Thrive PR Communications	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	51-200	73 contacts →
	Indirect evidence “Thrive is the largest independent, Australian-owned public relations agency that exists to help its people, partners and the community grow vigorously, flourish and be successful.” Source: RevenueBase Database · checked Sep 20, 2026
7	UMM	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	71 contacts →
	Indirect evidence “UMM crafts brand stories to motivate action.” Source: RevenueBase Database · checked Sep 20, 2026
8	Icon Agency	Partial evidence	Cremorne, AustraliaHQ checked Sep 20, 2026	51-200	62 contacts →
	Partial evidence “ICON is a full-service, award-winning creative communications agency inspired by independent thinking, guided by an interdisciplinary approach.” Source: RevenueBase Database · checked Sep 20, 2026
9	Cassette	Partial evidence	Cremorne, AustraliaHQ checked Sep 20, 2026	11-50	61 contacts →
	Partial evidence “At Cassette, creativity intersects with communications strategy, and integrated campaigns are delivered via memorable and compelling content.” Source: RevenueBase Database · checked Sep 20, 2026
10	Mango Communications	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	61 contacts →
	Partial evidence “Mango is a marketing communications agency offering public relations, social media, content creation and experiential expertise.” Source: RevenueBase Database · checked Sep 20, 2026
11	Purple	Partial evidence	Perth, AustraliaHQ checked Sep 20, 2026	11-50	54 contacts →
	Partial evidence “Purple is one of Australia’s leading marketing and communications agencies – using insight, impact, influence and innovation to drive positive change for our clients, our people…” Source: RevenueBase Database · checked Sep 20, 2026
12	Phillips Group	Indirect evidence	Brisbane, AustraliaHQ checked Sep 20, 2026	11-50	54 contacts →
	Indirect evidence “At Phillips Group, we see beyond the obvious – that’s what sets us apart.” Source: RevenueBase Database · checked Sep 20, 2026
13	Mahlab	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	51-200	49 contacts →
	Partial evidence “Mahlab is a business communications house headquartered in Asia Pacific, with almost 30 years’ experience in telling complex stories that create real and positive impact for…” Source: RevenueBase Database · checked Sep 20, 2026
14	ID Collective	Partial evidence	St Kilda, AustraliaHQ checked Sep 20, 2026	11-50	49 contacts →
	Partial evidence “iD Collective is a results-driven and solution-focused creative communications agency, working as an extension of your team.” Source: RevenueBase Database · checked Sep 20, 2026
15	BPR	Partial evidence	Adelaide, AustraliaHQ checked Sep 20, 2026	n/a	49 contacts →
	Partial evidence “BPR is a boutique Adelaide marketing communications agency specialising in strategic brand management, events and results driven public relations.” Source: RevenueBase Database · checked Sep 20, 2026
16	Herd MSL	Indirect evidence	Pyrmont, AustraliaHQ checked Sep 20, 2026	51-200	47 contacts →
	Indirect evidence “Herd MSL has offices in Sydney, Australia and Auckland, New Zealand.” Source: RevenueBase Database · checked Sep 20, 2026
17	Dentsu QLD	Partial evidence	Brisbane, AustraliaHQ checked Sep 20, 2026	51-200	42 contacts →
	Partial evidence “dentsu Qld is a leading marketing and communications specialist agency known for delivering best-in-class integrated services and solutions in media, CXM, creative and public…” Source: RevenueBase Database · checked Sep 20, 2026
18	Rapid Media	Partial evidence	Newstead, AustraliaHQ checked Sep 20, 2026	11-50	42 contacts →
	Partial evidence “Rapid Media is a full-service communications agency offering media, digital and creative solutions to clients across a range of industries including retail, FMCG and e-commerce to…” Source: RevenueBase Database · checked Sep 20, 2026
19	Make IT Happen	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	41 contacts →
	Partial evidence “We’re an independent full service creative and marketing agency based in Sydney specialising in brand, demand and digital communications.” Source: RevenueBase Database · checked Sep 20, 2026
20	AJF	Indirect evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	51-200	40 contacts →
	Indirect evidence “AJF Partnership is one of Australia's largest independent agencies with a staff of over 110 in our Melbourne office.” Source: RevenueBase Database · checked Sep 20, 2026
21	Wild Hive	Indirect evidence	Springwood, AustraliaHQ checked Sep 20, 2026	11-50	38 contacts →
	Indirect evidence “Wild Hive is a community of creatively inspired individuals who share a passion for people and a mission to share our clients’ vision with their audience.” Source: RevenueBase Database · checked Sep 20, 2026
22	Honner	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	36 contacts →
	Partial evidence “Honner, A FINN Partners Company is a specialist communications consultancy for the financial and corporate sectors across Australia and the Asia-Pacific.” Source: RevenueBase Database · checked Sep 20, 2026
23	ALT Shift	Partial evidence	Fitzroy, AustraliaHQ checked Sep 20, 2026	11-50	35 contacts →
	Partial evidence “An independent communications agency that gets our clients noticed.” Source: RevenueBase Database · checked Sep 20, 2026
24	Sefiani, Part Of Clarity Global	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	35 contacts →
	Partial evidence “Sefiani is a leading Australian communications agency that has built, enhanced and protected corporate and brand reputations over two decades.” Source: RevenueBase Database · checked Sep 20, 2026
25	Marketforce A Member Of Clemenger Bbdo Network	Partial evidence	West Perth, AustraliaHQ checked Sep 20, 2026	51-200	33 contacts →
	Partial evidence “Marketforce is a Brand & Media Marketing Communications Agency.” 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: internal communications agencies. 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 internal communications agencies.
Partial evidence: Its own public description names part of internal communications agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name internal communications agencies. 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 496 internal communications agencies based in Australia

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Internal communications agencies based in Australia at a glance

As of Sep 20, 2026

35.0%Verified-email coverage

12.4Average contacts per company

1-10Median size (employees)

20.0%Largest-city concentration · Sydney

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

326

11-50

140

51-200

201-500

501-1,000

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 496 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 internal communications agencies, 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 “internal communications agencies”. 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 internal communications agencies), 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 internal communications agencies, 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, 2,150 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.

Internal communications agencies 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 internal communications agencies, 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 internal communications agencies are there based in Australia?

RevenueBase identified 496 internal communications agencies 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?

Jimjam Ideas, headquartered in Sydney, tops this list with the largest team on record.

Which city has the most internal communications agencies?

Sydney leads with 99 headquartered companies, followed by Melbourne (64) and Brisbane (37).

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 2,150 verified decision-maker contacts tracked across these 496 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.