Company lists · Data verified August 2026

Top 25 Carbon accounting software companies based in Australia

Name: Carbon accounting software companies based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 105 companies tracked

There are 105 carbon accounting software companies headquartered in Australia (RevenueBase, August 2026). RevenueBase tracks 628 professional contacts across them, including 223 with verified work emails and 43 with mobile numbers. Sydney is the largest hub.

This list covers carbon accounting software companies 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.

105Companies

628Contacts tracked

223Verified emails

43Mobile numbers

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The 25 largest carbon accounting software companies based in Australia

Ranked by team size

Top 25 of 105 carbon accounting software companies 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	Optima Technology	Melbourne	11-50	46	14
2	Core Markets	Melbourne	11-50	35	25
3	Vela Sustainability Technologies	Brisbane	201-500	30	3
4	CLIMA	Sydney	11-50	24	2
5	Generate Zero	Sydney	11-50	22	13
6	Buildings Alive	Sydney	11-50	16	10
7	Informed 365	Currumbin Valley	11-50	16	7
8	Clear Carbon	Perth	1-10	15	8
9	Kinesis	Sydney	11-50	15	7
10	Netnada	Sydney	11-50	15	6
11	2xe	North Adelaide	11-50	14	12
12	Flintpro	Canberra	11-50	14	6
13	Avarni	Sydney	11-50	13	4
14	The Lever Room	Melbourne	1-10	12	8
15	Super Smart Energy	West Perth	11-50	12	6
16	Ruminati	Gundagai	1-10	11	8
17	The Mullion Group	Canberra	11-50	11	5
18	Sensand	Melbourne	11-50	9	6
19	Noco2 Carbon Reduction Institute	Sydney	11-50	9	4
20	Climate Zero	Albert Park	11-50	8	5
21	Greener	Sydney	1-10	8	2
22	Empauer	Richmond	201-500	7	5
23	Isystain	Brisbane City	11-50	7	4
24	Carbonhalo	Hobart	11-50	7	3
25	N0de	Melbourne	1-10	7	1

Showing 25 of 105 carbon accounting software companies based in Australia

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Carbon accounting software companies based in Australia at a glance

As of Aug 28, 2026

1-10Median size (employees)

SydneyLargest hub · 31 HQs

43Contacts with mobile numbers

2Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

Carbon accounting software companies by metro

Metro	Companies
Carbon accounting software companies in Sydney	31
Carbon accounting software companies in Melbourne	18
Carbon accounting software companies in Brisbane	7
Carbon accounting software companies in Canberra	5
Carbon accounting software companies in Perth	5
Carbon accounting software companies in Adelaide	4
Carbon accounting software companies in Salisbury	1

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 “carbon accounting software companies”, 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; 2 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 carbon accounting software companies are there based in Australia?

There are 105 carbon accounting software companies headquartered in Australia as of August 2026 (RevenueBase).

What is the largest company on this list?

Optima Technology, headquartered in Melbourne, tops this list with the largest team on record.

Which city has the most carbon accounting software companies?

Sydney leads with 31 headquartered companies, followed by Melbourne (18) and Brisbane (7).

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 223 verified decision-maker contacts tracked across these 105 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.