Company lists · Data refreshed September 2026

Top 13 Infosec pr firms based in Sydney, Australia

Name: Infosec pr firms based in Sydney, Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 27 companies tracked

RevenueBase identified 27 infosec pr firms headquartered in Sydney, Australia as of September 2026 and tracks 306 professional contacts across them, including 182 with verified work emails. Across Australia, Sydney is the largest hub for this category.

This list covers infosec pr firms headquartered in Sydney, 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 28, 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 28, 2026 86% judged on-target in blind review

27Companies

306Contacts tracked

182Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 13 largest infosec pr firms based in Sydney, Australia

Ranked by team size

Top 13 of 27 infosec pr firms based in Sydney, Australia, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to infosec pr 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	SEC Newgate Australia	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	51-200	110 contacts →
	Indirect evidence “SEC Newgate Australia is Australia’s largest full-service strategic communications firm for complex issues.” Source: RevenueBase Database · checked Sep 28, 2026
2	Thrive PR Communications	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 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 28, 2026
3	Seccom Global	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	41 contacts →
	Indirect evidence “Seccom Global - The Cyber Security Company Providing excellence in service to educate, connect and protect your business Founded in 2003, Seccom Global is recognised as a leader…” Source: RevenueBase Database · checked Sep 28, 2026
4	Wilkinson Group	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	12 contacts →
	Partial evidence “Wilkinson Group is a Sydney communications agency, specialising in crisis PR.” Source: RevenueBase Database · checked Sep 28, 2026
5	Cyberhub Group	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	9 contacts →
	Indirect evidence “CyberHub was established with the aim of making Cyber Security more available to companies of all sizes.” Source: RevenueBase Database · checked Sep 28, 2026
6	kbi.digital	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	8 contacts →
	Indirect evidence “KBI is a marketing and media company, servicing the security and emerging tech industry.” Source: RevenueBase Database · checked Sep 28, 2026
7	P&l Corporate Communications	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “For over 10 years, P&L Corporate Communications has partnered blue chip Australian and global clients, raising their profile and enhancing their corporate reputation.” Source: RevenueBase Database · checked Sep 28, 2026
8	The PR HUB	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “The PR Hub is an Australian strategic communications firm working with ambitious founders, CEOs and leadership teams whose businesses are growing, but whose external profile has…” Source: RevenueBase Database · checked Sep 28, 2026
9	PR Deadlines	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “Established on the pillars of executive journalism, PR Deadlines has flourished over the past two decades into a premier PR agency, distinguishing itself in the realms of…” Source: RevenueBase Database · checked Sep 28, 2026
10	Sphere Public Relations	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “We are dedicated to raising the profile of dynamic brands in the pure tech and martech sectors, to create clever communications and content that raises their profile, widens their…” Source: RevenueBase Database · checked Sep 28, 2026
11	Sense Of Security	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	3 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
12	Brand Comms Bureau	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Brand Comms Bureau is a full-stack media strategy, public relations, marketing, content and events agency servicing companies across ANZ, Asia, the US and Europe working in…” Source: RevenueBase Database · checked Sep 28, 2026
13	AMY Boyce Communications & PR	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “At ABC PR, we help finance and corporate businesses become credible, consistent voices in the market across earned and owned media.” Source: RevenueBase Database · checked Sep 28, 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: infosec pr 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 infosec pr firms.
Partial evidence: Its own public description names part of infosec pr firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infosec pr 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 13 of 27 infosec pr firms based in Sydney, Australia

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 182 reachable decision-makers.

Free signup · no credit card

View the full list →

Infosec pr firms based in Sydney, Australia at a glance

As of Sep 28, 2026

59.5%Verified-email coverage

11.3Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole Australia list rather than for Sydney, so it is reported there. Company counts and contact totals on this page are exact for Sydney, over 27 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 infosec pr 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 Sydney, Australia whose own description of what they do matches “infosec pr 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 infosec pr 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 infosec pr firms, and records with no verified work email. Companies headquartered outside Sydney 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, 182 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 28, 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 infosec pr 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 infosec pr firms are there based in Sydney, Australia?

RevenueBase identified 27 infosec pr firms headquartered in Sydney, 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?

SEC Newgate Australia, headquartered in Sydney, tops this list with the largest team on record.

Which city in Australia has the most infosec pr firms?

Sydney leads Australia with 27 headquartered companies, followed by Melbourne (17) and Brisbane (12).

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 182 verified decision-maker contacts tracked across these 27 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 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 27 infosec pr firms based in Sydney, Australia. Start with a free account, no credit card.

Download this list →

Related lists

Infosec pr firms by geography

Browse the directory

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.