Best Sustainability Tech Companies in Sydney, Australia
The 116 best Sustainability Tech companies in Sydney, Australia in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Symphony.
Our analysis of 293 Sustainability Tech companies
$38.4b in tracked funding; 83% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Sustainability Tech companies in Sydney
| # | Company | Disclosed funding | Last round | Stage | Employees | Founder | Tech stack | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | Symphony Energy transition infrastructure platform 35Moat top 22%Funding top 23%Talent bottom 49%Market bottom 37% All 5 signals ▾Moattop 22% Fundingtop 23% Talentbottom 49% Marketbottom 37% Globalbottom 36% Moat: Editorial + unicorn rating 8/10 · Soonicorn Funding: Raised $300M across 2 rounds · 2 rounds over 2 yrs (1.0/yr) rank vs industry peers · Fliar Intelligence Index 35/100 | $300M | 23 mo ago | Series A | — | Steven Butler Founder & CEO | — | 1 partnership |
| 2 | Brighte Provider of payment facility solution in the solar financing segment 67Tech top 16%Funding top 26%Moat top 28%Growth top 35% All 10 signals ▾Techtop 16% Fundingtop 26% Moattop 28% Growthtop 35% Producttop 35% Markettop 46% Talentbottom 49% Fin. healthbottom 48% Newsbottom 46% Globalbottom 37% Tech: 49 technologies across 7/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 Funding: Raised $207M across 8 rounds · 8 rounds over 10 yrs (0.8/yr) rank vs industry peers · Fliar Intelligence Index 67/100 | $207M | 7 mo ago | Series C | 125 | Katherine Mcconnell Founder & CEO | SentryReactEmotion+19 | 1 partnership · 3 awards |
| 3 | Willow Provider of a SaaS and AI-driven digital twin platform for commercial spaces | $110M | 42 mo ago | Series A | 321 | Joshua Ridley Co-Founder | WordPressApple iCloud MailMySQL+24 | 1 partnership · 1 award |
| 4 | SpeeDx Provider of qPCR-based molecular diagnostics platform | $78M | 39 mo ago | Series C | 113 | Alison Todd Co-Founder | WordPressMySQLPHP+41 | 5 partnerships |
| 5 | Neara Developer of physics-enabled digital twin software for utility network management 62Funding top 19%Growth top 35%Tech top 35%News top 37% All 8 signals ▾Fundingtop 19% Growthtop 35% Techtop 35% Newstop 37% Moattop 39% Talentbottom 49% Marketbottom 48% Globalbottom 48% Funding: Raised $61.6M across 5 rounds · 5 rounds over 5 yrs (1.0/yr) Growth: Web rank 10,000,000 → 5,000,000 YoY · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 62/100 | $62M | 4 mo ago | Series D | 71 | Daniel Danilatos Founder & CEO | WordPressMySQLPHP+38 | — |
| 6 | Recce Developer of antibiotics for drug-resistant bacteria and cancer treatments | $41M | 12 mo ago | Public | — | James Graham CEO | WordPressMySQLPHP+26 | 4 partnerships |
| 7 | CIMET Provider of white-label platform for customer experience management | $27M | 51 mo ago | Series B | 80 | Ankit Jain Founder & CEO | Apple iCloud MailMicrosoft 365Node.js+14 | — |
| 8 | Topelia Developer of antiviral triple therapy for coronavirus infection | $25M | 56 mo ago | Series A | — | David Fox CEO | — | — |
| 9 | Unleash live AI based platform offering image and video analytics solutions | $13M | 57 mo ago | Series A | 28 | Hanno Blankenstein CEO and Co-founder | Cart FunctionalitySquarespace CommerceSquarespace+27 | 5 job openings |
| 10 | Pathzero Provider of solutions to calculate carbon emission | $12M | 42 mo ago | Series A | 50 | Charbel Ayoub Co-Founder & CTO | — | — |
| 11 | Licella Provider of patented hydrothermal liquefaction technology | $12M | 11 mo ago | Seed | 34 | — | WordPressMySQLPHP+19 | — |
| 12 | Okra Solar P2P Solar power sharing platform | $10M | 33 mo ago | Series A | 31 | Afnan Hannan Co-Founder & Software Engineer | WebflowGSAPAmazon Web Services+10 | 1 launch · 1 partnership |
| 13 | CIM SaaS & AI-driven building analytics platform for commercial properties | $10M | 45 mo ago | Series A | 82 | David Walsh Founder & CEO | WebflowGSAPMicrosoft Clarity+21 | 3 launchs · 2 partnerships |
| 14 | Switch Automation Provider of IoT and SaaS-driven building energy management solutions | $9M | 74 mo ago | Series A | 62 | Deb Noller Co-Founder & CEO | — | — |
| 15 | Wattwatchers SaaS and IoT-based meter energy consumption monitoring devices | $9M | 56 mo ago | Series B | 24 | Gavin Dietz CEO & MD | WordPressMySQLPHP+35 | — |
| 16 | VAPAR Developer of ML based platform for assessing the condition of sewer pipes | $7M | 28 mo ago | Series A | 20 | — | WordPressMySQLPHP+27 | 1 job opening · 3 partnerships |
| 17 | Avarni Cloud-based platform to offset and manage carbon emissions | $5M | 31 mo ago | Series A | 21 | Anuj Paudel Co-Founder and Co-CEO | — | 1 launch |
| 18 | HydGene Renewables Provider of hydrogen and renewable energy | $4M | 36 mo ago | Seed | 7 | Louise Brown Co-Founder & CEO | WixSentryApple iCloud Mail+13 | 1 partnership |
| 19 | Greener Provider of solutions to offset the carbon footprint | $4M | 43 mo ago | Series A | — | Tom Ferrier Founder | — | — |
| 20 | Lleaf Provider of light diffusers for indoor farms and greenhouses 6Funding bottom 46%Global bottom 38%Market bottom 20% All 3 signals ▾Fundingbottom 46% Globalbottom 38% Marketbottom 20% Funding: Raised $3.5M across 1 rounds · 1 rounds over 4 yrs (0.2/yr) Global: Investors from 3 countries beyond Australia rank vs industry peers · Fliar Intelligence Index 6/100 | $4M | 45 mo ago | Seed | 5 | — | — | — |
| 21 | RecycleSmart Provider of waste collection solution | $2M | 11 mo ago | Seed | 15 | Marco Galletti CTO and Co-Founder | Cart FunctionalitySquarespace CommerceSquarespace+29 | 1 job opening · 1 partnership · 1 expansion |
| 22 | Fulcrum3D Developer of measurement techniques for wind and solar systems | $2M | 87 mo ago | Funding Raised | — | Martin Poole Co-Founder | — | — |
| 23 | Trace Provider of solutions to offset carbon footprint | $2M | 28 mo ago | Seed | 15 | Joanna Auburn Co-Founder | Webflow EcommerceWebflowReact+34 | — |
| 24 | Enosi Blockchain-based platform offering clean energy traceability solution | $1M | 56 mo ago | Seed | 13 | — | Cart FunctionalitySquarespace CommerceSquarespace+21 | 1 partnership |
| 25 | Fugu Provider of carbon capture solution | $1M | 23 mo ago | Seed | — | Mac Thompson Co-Founder | — | 1 expansion |
| 26 | Algenie Provider of technology for algae production 14Talent top 28%Tech bottom 41%Funding bottom 36%Market bottom 25% All 5 signals ▾Talenttop 28% Techbottom 41% Fundingbottom 36% Marketbottom 25% Globalbottom 25% Talent: 3 named leaders on record · 3 C-suite/founder profiles curated Tech: 10 technologies across 3/8 capability areas · Cloud: Cloudflare rank vs industry peers · Fliar Intelligence Index 14/100 | $1M | 21 mo ago | Seed | — | Mathieu Pernice Co-Founder | Framer SitesReactCloudflare+7 | 1 job opening |
| 27 | Vyro Online platform for buying electric cars | $1M | 49 mo ago | Seed | 7 | — | — | — |
| 28 | Objective Enterprise content management and data governance solution | $647K | 137 mo ago | Public | 347 | — | Craft CMSSentryApple iCloud Mail+28 | — |
| 29 | CarbonHQ Online platform for carbon project management | $600K | 28 mo ago | Seed | — | Eugene Datsky Co-Founder | — | 1 partnership |
Top 12 Sustainability Tech companies in Sydney
#1
Series C · Sydney, New South Wales · founded 2015 · 125 employees$206.5Mraised▾
Brighte provides payment facility solutions in the solar financing segment. It works on credit analysis and customer payables which follow solar financing and provides consumers with affordable payment plans to pay for solar and smart home technology with 'zero interest'. It provides zero-interest loans and variable repayment terms to customers for buying a product from one of the empanelled vendors by granting instant loan decisions. Its marketplace includes solar systems, flooring, roofing, pool heating system, guttering, etc.
- Nov 2025Grant (prize money)$26M
- Dec 2020Series C$100M
- Oct 2019Series B$10.6M
- Jul 2019Conventional Debt$130M
#2
Series D · Sydney, New South Wales · founded 2016 · 71 employees$61.6Mraised▾
Developer of physics-enabled digital twin software for utility network management. The software simulates network behavior under various conditions, such as severe weather and design changes. It identifies vulnerabilities and validates potential remediation solutions. The software also generates reports to quantify network needs and measure outcomes.
- Feb 2026Series D$63.5M
- Oct 2024Series C$31M
- Sep 2023Series B$10M
- May 2022Series B$14M
#3
Public · Sydney, New South Wales · founded 2007$40.8Mraised▾
Developer of antibiotics for drug-resistant bacteria and cancer treatments. The company's pipeline includes RECCE 327 (R327) as an intravenous and topical therapy that is being developed for the treatment of serious and potentially life-threatening infections due to Gram-positive and Gram-negative bacteria, including their superbug forms; RECCE 435 (R435) as an orally administered therapy for bacterial infections; and RECCE 529 (R529) for viral infections.
- Jun 2025Post IPO$4.8M
- Apr 2025Post IPO$10.1M
- Sep 2020Post IPO$20.1M
- Oct 2019Post IPO$4.6M
#4
Series A · Sydney, New South Wales · founded 2024$300Mraised▾
Energy transition infrastructure platform. It orchestrates on the ground expertise with institutional capital markets to accelerate the transition.
- Jul 2024Series A$202M
- Jul 2024Conventional Debt$126.6M
#5
Seed · Sydney, New South Wales · founded 2005 · 34 employees$11.5Mraised▾
Provider of patented hydrothermal liquefaction technology. It delivers low-carbon solutions through its advanced technology, enabling the sustainable transformation of waste feedstocks into biofuels, biochemicals, and recycled materials. Its patented technology, the Catalytic Hydrothermal Reactor (Cat-HTR), offers a game-changing approach to waste conversion. Licella partners with industry leaders to develop innovative solutions for a lower carbon future.
- Jul 2025Seed—
- Feb 2025Grant (prize money)$8M
- Aug 2023Seed—
- May 2022Grant (prize money)$3.5M
#6
Seed · Sydney, New South Wales · founded 2019 · 15 employees$2.1Mraised▾
Provider of waste collection solution. Users can book a pickup for waste collection from the app. It provides recycling services for e-waste, clothing, and soft plastics. Its mobile app is available for both ios and android devices.
- Jul 2025Seed$1M
- May 2024Seed$1.1M
- Jul 2023Seed$1M
#7
Series C · Sydney, New South Wales · founded 2009 · 113 employees$78Mraised▾
Provider of qPCR-based molecular diagnostics platform. The company's products include multiplexed assays for HSV-1 and -2, VZV, and Syphilis, and detecting the presence of Mycoplasma genitalium as well as antibiotic resistance. The products are based on plexZyme technology where primers amplify target nucleic acid sequences and produce an amplicon.
- Feb 2023Series C$26M
- May 2021Grant (prize money)—
- Sep 2020Grant (prize money)—
- Feb 2020Series B$15M
#8
Series A · Sydney, New South Wales · founded 2017 · 321 employees$109.7Mraised▾
Provider of a SaaS and AI-driven digital twin platform for commercial spaces. It offers services such as project designing, 3D model creation, digital engineering, maintenance manuals with sensor IoT data, creating smart building features, and more. The solution enables users to perform predictive maintenance, track maintenance requests, get access to energy consumption data, analyze it, and more. It also offers community management solutions such as booking common facilities, inventory management, sending notifications, tracking & responding to tenant requests, and emergency management, among others.
- Dec 2022Angel$28.8M
- Sep 2021Series A$43M
- 2019Series A$37.9M
#9
Series A · Sydney, New South Wales · founded 2017 · 20 employees$7.3Mraised▾
Developer of ML-based platform for assessing the condition of sewer pipes. The company claims that the platform leverages machine learning and data science to unearth bottlenecks in piped infrastructure thereby reducing the associated cost/time, double-handling of data, and variability of assessments.
- Feb 2024Grant (prize money)$195.1K
- Jan 2024Series A$5M
- Jun 2022Seed$1.8M
- Aug 2020Grant (prize money)$490K
#10
Seed · Sydney, New South Wales · founded 2023$1.1Mraised▾
Provider of technology for algae production. The platform enables the cultivation of algae, which can be used to produce clean energy, bioplastics, and feed supplements.
- Sep 2024Seed$1.1M
#11
Series A · Sydney, New South Wales · founded 2016 · 31 employees$9.9Mraised▾
P2P Solar power sharing platform. The system can also integrate existing installations into the common grid. It offers solutions where excess power generated post-sharing that was wasted previously can be used to power productive uses and supply powerless neighbors.
- Sep 2023Series A$7.8M
- Sep 2023Conventional Debt$4.2M
- Dec 2022Conventional Debt$4.5M
- Jun 2022Seed$2.1M
#12
Seed · Sydney, New South Wales · founded 2023$1.1Mraised▾
Provider of carbon capture solution. It sucks carbon dioxide out of the air, and ship it to industrial users around the planet. It uses renewable energy to capture carbon and convert them into sustainable aviation fuel, methanol, methane and other emerging e-fuel.
- Jul 2024Seed$1.1M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Sustainability Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Climate Adaptation in Sydney is moving
A read on the academic research around Climate Adaptation in Sydney — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 71 papers.
UNSW Sydney, Western Sydney University, and UTS lead Sydney's climate-adaptation research, focusing predominantly on flood risk and disaster resilience, with a cautious, concern-dominated tone.
- UNSW Sydney21
- Western Sydney University21
- University of Technology Sydney14
- The University of Sydney13
- University of Sydney4
- Flood myth4
- Climate risk2
- Water resource management2
- Flood mitigation2
- Climate change2
- Climate change2→7
- Climate change4→20
- Flood myth2→7
- Resilience (materials science)2→7
- Environmental planning1→5
- Climate risk1→5
Common questions
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.