72 indexable Sustainability Tech companies headquartered in Vienna, Austria, ranked by total equity funding and recent funding momentum. Combined disclosed equity funding of $863.7M across 21 funded companies.
| # | Company | Funding | Valuation | Stage | Latest round | Employees | Founded | Momentum |
|---|---|---|---|---|---|---|---|---|
| 1 |
GROPYUS
Developer of green buildings |
$251M | — | Series D | Series D Mar 2026 | 400 | 2019 | ↑ Active |
| 2 |
Sequestra
Platform that recycles industrial waste materials, enabling the reduction of global carbon emissions |
$8M | — | Seed | Seed Mar 2026 | — | 2024 | ↑ Active |
| 3 |
ecop
Developer of industrial rotation heat pump technology for waste heat recovery |
$23.2M | — | Series B | Series B May 2025 | 11 | 2007 | ↑ Active |
| 4 |
EcoNetix
Provider of carbon emission reduction solution |
$5.3M | — | Seed | Seed Sep 2025 | — | 2023 | ↑ Active |
| 5 |
Wohnio
Provider of heating optimization solutions for residential and commercial properties |
$1.3M | — | Seed | Seed Sep 2025 | — | 2023 | ↑ Active |
| 6 |
HOOKIPA Pharma
Developer of immunotherapies for the treatment of infectious diseases and cancer |
$133.7M | — | Public | Post IPO Dec 2023 | 132 | 2011 | — |
| 7 |
Enspired
Alternative investment platform focused on trading energy assets |
$36.2M | — | Series B | Series B May 2024 | 59 | 2020 | — |
| 8 |
Nabriva
Developer of pleuromutilin class of antibiotics for MDR infections |
$193.1M | — | Public | Conventional Debt Dec 2018 | 39 | 2006 | — |
| 9 |
Themis Bioscience
Prophylactic vaccines for infectious diseases |
$82.5M | — | Acqui-Hired | Series D Sep 2019 | 40 | 2009 | — |
| 10 |
HYDROGRID
Intelligent IoT solution for optimizing and controlling hydropower plants |
$8.5M | — | Series A | Series A Dec 2023 | — | 2016 | — |
| 11 |
Arkeon
Developer of protein ingredients through carbon-capture |
$13.8M | — | Seed | Seed Jan 2023 | 35 | 2021 | — |
| 12 |
Intercell
Developer of vaccines for infectious diseases (merged with Vivalis {France} to form Valneva in 2012) |
$78.6M | — | Acquired | Series B Feb 2011 | — | 1998 | — |
| 13 |
crystalsol
Developer of flexible photovoltaic films |
$11.1M | — | Series A | Grant (prize money) Sep 2020 | 11 | 2008 | — |
| 14 |
imd Biotech
Developer of diagnostic equipment for biomolecule detection and measurement |
$430.8K | — | Seed | Angel May 2024 | — | 2020 | — |
| 15 |
Marinomed
Developer of drugs for immunology, allergy and infectious diseases |
$6.3M | — | Public | Post IPO Oct 2021 | 44 | 2006 | — |
| 16 |
EveliQure Biotechnologies
Developing a vaccine against Diarrhea using a proprietary technology platform |
$5.5M | — | Funding Raised | Grant (prize money) Sep 2019 | 7 | 2012 | — |
| 17 |
Wowflow
SaaS-driven maintenance management software for owners and property managers |
$1.4M | — | Seed | Seed Aug 2022 | 13 | 2012 | — |
| 18 |
PhagoMed
Company developing alternatives to antibiotics through their expertise in phage therapy |
$1.7M | — | Acquired | Seed Jul 2019 | 14 | 2016 | — |
| 19 |
Ivary
At-home diagnostic kits to assess the ovarian reserve |
$1.3M | — | Deadpooled | Seed Feb 2017 | — | 2014 | — |
| 20 |
Grid Singularity
Decentralized energy data exchange platform |
$454K | — | Funding Raised | Grant (prize money) Oct 2021 | 17 | 2016 | — |
| 21 |
Carbon Recovery
Provider of used tire recycling technology solutions |
$380.1K | — | Seed | Seed Jul 2018 | — | 2017 | — |
| 22 |
CellEctric Biosciences
Developer of a technology for detection of sepsis |
— | — | Funding Raised | Grant (prize money) Jun 2024 | 15 | 2021 | — |
| 23 |
Balun Energy
Provider of energy management solution |
— | — | Seed | Seed Jan 2024 | — | 2023 | — |
| 24 |
Sense Seven
Provider of inspection systems using acoustic emission and artificial intelligence |
— | — | Seed | Seed Mar 2023 | 8 | 2021 | — |
| 25 |
nista
Provider of energy efficiency as a service |
— | — | Seed | Seed Jan 2022 | 21 | 2020 | — |
| 26 |
GREENPASS
Provider of SaaS platform for climate-proof real estate and portfolio management |
— | — | Seed | Seed Jan 2022 | 23 | 2018 | — |
| 27 |
QuantaRed
Provider of oil in water detection solutions |
— | — | Funding Raised | Dec 2019 | 8 | 1999 | — |
| 28 |
HAKOM
Provider of time series management software and services. It develops and offers software solutions for the analysis, prediction, and visualization of time series data. The company also provides professional services and support for its software, including cloud-based and on-premises options. Its technology is designed for scalability and interoperability with various data sources and formats. The focus is on enabling clients to derive actionable insights from their time series data. |
— | — | Acquired | Grant (prize money) Nov 2018 | — | 1991 | — |
| 29 |
Twingz
Monitoring, control and optimization of energy consumption |
— | — | Seed | Seed Apr 2016 | 8 | 2010 | — |
| 30 |
Origimm
Biotech company focused on antigen and drug target discovery for prevention and treatment of dermatological/infectious conditions |
— | — | Acqui-Hired | Seed May 2014 | 12 | 2014 | — |
| 31 |
BRIDGE Energy
Provider of products for energy and resource optimization |
— | — | Series A | Series A Jun 2006 | — | 2006 | — |
| 32 |
Alteso
AI-driven platform offering photovoltaic performance optimization solutions |
— | — | Funding Raised | — | 13 | 2014 | — |
| 33 |
Aspire Innova
Developer of vaccines against infectious diseases |
— | — | Unfunded | — | — | 2022 | — |
| 34 |
Austrianni
Developing drugs and vaccines to treat Tuberculosis |
— | — | Unfunded | — | — | 2015 | — |
| 35 |
BrightComSol
Developer of a technology to mix perovskite quantum dots with polymers |
— | — | Funding Raised | — | 5 | 2020 | — |
| 36 |
BTM Energy
Provider of web-based smart metering, energy management, and benchmarking solutions |
— | — | Unfunded | — | — | 2006 | — |
| 37 |
Circe
Developer of biodegradable polymers |
— | — | Unfunded | — | — | 2018 | — |
| 38 |
colibrie
Provider of software for managing energy communities |
— | — | Funding Raised | — | — | 2016 | — |
| 39 |
Covirabio
Developer of a technology platform for infectious diseases diagnosis |
— | — | Unfunded | — | 6 | 2020 | — |
| 40 |
Crowd4Climate
Debt crowdfunding platform for climate protection projects |
— | — | Unfunded | — | — | 2015 | — |
| 41 |
Crowd4Energy
P2P lending and investment platform for energy projects |
— | — | Unfunded | — | — | 2016 | — |
| 42 |
digidrip
Provider of sensor-based irrigation systems for plants |
— | — | Unfunded | — | — | — | — |
| 43 |
EcoX
Provider of innovative energy management solutions |
— | — | Unfunded | — | — | 2024 | — |
| 44 |
EfficientIO
Provider of software solutions for energy management |
— | — | Unfunded | — | — | 2021 | — |
| 45 |
FONTUS
Provider of water bottle that converts atmospheric air into water |
— | — | Unfunded | — | — | 2016 | — |
| 46 |
FSIGHT
Platform to forecast the electricity consumption |
— | — | Acqui-Hired | — | 20 | 2014 | — |
| 47 |
Hydrox Systems
Provider of hydrogen generation kits for reducing fuel emissions |
— | — | Unfunded | — | — | 2010 | — |
| 48 |
I-AM
Asset manager specializing in ESG and impact strategies, including microfinance investments |
— | — | Acquired | — | — | 2006 | — |
| 49 |
Lavis
Provider of digital laundry rooms for property, offering an app for residents to pay, monitor machine availability, and make reservations |
— | — | Unfunded | — | — | 2020 | — |
| 50 |
Luke Roberts
Bidirectional multi color smart lamp for homes |
— | — | Unfunded | — | — | 2014 | — |
Gropyus is a developer of green buildings. It uses timber-based materials in its buildings.
Platform that recycles industrial waste materials, enabling the reduction of global carbon emissions. Its technology allows for carbonation of mineral materials,enabling the removal of carbon dioxide from the atmosphere.
Developer of industrial rotation heat pump technology for waste heat recovery. It provides rotation heat pumps utilizing a patented technology for industrial applications. The heat pumps recover waste heat and efficiently elevate it to high temperatures for industrial processes, district heating, and cooling. The technology offers flexibility in applications such as heat boosting and combined heating/cooling processe
Provider of carbon emission reduction solution. It measures and reports carbon emissions digitally by implementing IoT system that uses sensors, satellite imaging, weather data, and AI algorithms.
Provider of heating optimization solutions for residential and commercial properties. The company offers services to digitize and decarbonize heating systems. It facilitates the transition to green energy systems. The company provides portfolio oversight, continuous optimization, and early detection of system defects.
Developer of immunotherapies for the treatment of infectious diseases and cancer. The company uses a proprietary arenavirus platform to develop a product pipeline that inlcudes HB-201 and HB-202 for the treatment of Human Papillomavirus-16 positive (HPV16+) cancers.
Alternative investment platform focused on trading energy assets. It provides AI-driven solutions to optimize power portfolio. It provides solutions to direct market access with power trading services based on data, self-learning models, and cutting-edge technology.
Nabriva Therapeutics is developing pleuromutilin class of antibiotics for MDR infections. Its lead product candidate is Lefamulin for treating acute bacterial skin and skin structure infections (phase II); intravenous and oral formulations for the treatment of community-acquired bacterial pneumonia (CABP) (FDA approved); for pediatric indications (phase I), STI, osteomyelitis, HABP/VABP, and prosthetic joined infecti
Themis Bioscience is focussed on developing prophylactic vaccines for infectious diseases. It is using its proprietary Themaxyn platform to identify and advance its vaccine candidates at various stages of development. It has initial vaccine candidates currently in development for chikungunya and dengue fever. The company has developed cancer therapies using a measles vector, such as adding different tumour killing an
Intelligent IoT solution for optimizing and controlling hydropower plants.The solution include real time predictive production planning, monitoring, and decision support tools for hydropower plant operators and traders. The software integrates machine learning algorithms to enable hydropower operators to react in real time to weather events, minimize water losses, and maximize power market revenues.
Developer of protein ingredients through carbon capture. The technique is carbon-negative, independent of agricultural land, and employs industrial CO₂ as a feedstock. It provides a sustainable alternative to traditional protein synthesis.
Intercell was developing vaccines for infectious diseases. It developed antigens and adjuvants for vaccines. In Dec 2012, Vivalis acquired Intercell for $174M, and the combined entity was renamed Valneva. The company had a vaccine for Japanese encephalitis in the market at the time of its acquisition.
INiTS
Europa
Austria Wirtschaftsservice
Arax Capital Partners
FFG
aws Grunderfonds
Amazon Web Services
ClimateLaunchpad
EIT Health
Global Life Science Ventures
HBM Partners
PUSH
Rankings are computed by Radar (Fliar BI) from the Radar company master and are updated periodically. Funding and momentum scores use disclosed equity-funding data only. Figures may lag private rounds. Last updated 2026-06-23.
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