Best Sustainability Tech Companies in Washington, United States
The 199 best Sustainability Tech companies in Washington, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Porch Group.
Our analysis of 84 Sustainability Tech companies
$19.4b in tracked funding; 85% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Sustainability Tech companies in Washington
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | Porch Group Provides software & service to home improvement industries | $718M | 38 mo ago | 1,800 | Matt Ehrlichman Founder | Cart FunctionalitySquarespace CommerceSquarespace+13 | — | — |
| 2 | Adaptive Biotechnologies Provider of clinical diagnostics, and drug discovery for immune diseases | $419M | 100 mo ago | 609 609 → 654 (+7%) · sector median +44% | Harlan Robins co-founder and chief Scientific Officer | WordPress Block EditorWordPressApple iCloud Mail+28 | 351 patents Immune repertoire sequencing for diagnostics, vaccine response, and engineered T‑cell therapies | 3 partnerships |
| 3 | CytoDyn Developer of humanized monoclonal antibodies for the treatment and prevention of HIV infection 32Funding top 17%Growth top 35%Patents top 36%Innovation top 44% All 10 signals ▾Fundingtop 17% Growthtop 35% Patentstop 36% Innovationtop 44% Moatbottom 49% Globalbottom 36% Techbottom 35% Newsbottom 26% Marketbottom 25% Fin. healthbottom 24% Funding: Raised $250M across 23 rounds · 23 rounds over 17 yrs (1.4/yr) Growth: Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 32/100 | $250M | 3 mo ago | 12 12 → 23 (+92%) · sector median +44% | — | Apple iCloud MailMicrosoft 365Bootstrap+8 | 107 patents CCR5-targeted biologics for HIV, cancer, NAFLD/NASH and immune‑modulating therapies | 1 partnership |
| 4 | INENTEC Technology developer for conversion of wastes to energy | $230M | 66 mo ago | 25 25 → 28 (+12%) · sector median +44% | Daniel Cohn Co-Founder | WixSentryBootstrap+12 | 81 patents Electromagnetic fluidized‑bed high‑temp processing for hydrogen, carbon capture, and PFAS destruction | — |
| 5 | Icosavax Developer of computationally designed VLP vaccines for treating multiple infections | $152M | 62 mo ago | 60 | Adam Simpson Founder & CEO | — | 123 patents Recombinant influenza neuraminidase tetramer nanoparticle vaccine antigens | 1 partnership · 1 award |
| 6 | LevelTen Energy Online renewable energy PPA marketplace | $137M | 23 mo ago | 146 | Bryce Smith Founder & CEO | Webflow EcommerceWebflowAsana+24 | — | 1 job opening |
| 7 | WSHFC Housing finance commission focused on developments | $122M | 84 mo ago | 97 | — | PleskWindows ServerMicrosoft ASP.NET+5 | — | 1 job opening |
| 8 | Curevo Developer of vaccines for the treatment of various diseases 29Funding top 25%Talent top 41%Moat top 43%Patents top 48% All 9 signals ▾Fundingtop 25% Talenttop 41% Moattop 43% Patentstop 48% Techtop 50% Innovationbottom 45% Globalbottom 39% Marketbottom 22% Newsbottom 18% Funding: Raised $86.0M across 3 rounds · 3 rounds over 4 yrs (0.8/yr) Talent: Analyst team rating 4/5 · 1 named leader on record rank vs industry peers · Fliar Intelligence Index 29/100 | $86M | 15 mo ago | 8 | George Simeon CEO | WordPress Block EditorElementorWordPress+29 | 3 patents Herpes zoster and combination vaccine formulations for immunogenic protection | — |
| 9 | Omnidian Provider of monitoring and maintenance solutions for solar PV systems | $81M | 13 mo ago | 192 | David Kenny Co-Founder & Chief Operating Officer | WordPress Block EditorwpBakeryWordPress+41 | — | — |
| 10 | Lumen Developer of biological drugs for the treatment of infectious diseases | $68M | 32 mo ago | 67 | Brian Finrow CEO & Founder | WordPressApple iCloud MailMicrosoft 365+20 | — | — |
| 11 | Theraclone Sciences Discovering human monoclonal antibodies for safe and effective therapeutic product development | $61M | 133 mo ago | 19 | Clifford J Stocks CEO | — | 225 patents Broadly neutralizing HIV‑1 envelope (Env) trimer monoclonal antibody therapeutics | — |
| 12 | Deako Manufacturer of modular smart lighting systems and related accessories | $61M | 23 mo ago | 21 | — | Cart FunctionalityWordPressMySQL+47 | 30 patents Patents concentrated in computing, sensing & instrumentation | 1 launch |
| 13 | WISErg Provider of technological solutions that convert food waste into premium organic liquid fertilizers | $57M | 101 mo ago | 41 | — | — | 24 patents Organic waste stabilization, pathogen mitigation, and microbial detection technologies | — |
| 14 | Cardeas Pharma Developer of inhaled antibiotics for DR gram negative infections | $49M | 134 mo ago | 2 | — | — | — | — |
| 15 | Optimum Energy SaaS-driven HVAC optimization software for commercial spaces | $41M | 115 mo ago | 47 47 → 106 (+126%) · sector median +44% | Larry Stapleton CEO & President | WordPressApple iCloud MailMicrosoft 365+28 | 75 patents Patents concentrated in mechanical & energy engineering | 5 job openings |
| 16 | Tune Therapeutics Developer of cell and gene therapy by using the epigenomic platform | $40M | 39 mo ago | 89 | Akira Matsuno Co-Founder | WordPress Block EditorWordPressMySQL+29 | — | — |
| 17 | Inspectify Provider of SaaS-driven inspection management services for professionals and homeowners | $33M | 20 mo ago | 34 34 → 75 (+121%) · sector median +44% | Josh Jensen Co-Founder & CEO | Cart FunctionalityRubyTrix+33 | — | 1 launch |
| 18 | Membrion Developer of membranes for the flow battery market | $32M | 12 mo ago | 29 | Greg Newbloom President & CEO | — | 39 patents Ceramic ion‑exchange membranes for selective capture and separation of chemicals | — |
| 19 | HDT Bio Developer of immunotherapy for the treatment of cancer & infectious diseases | $31M | 13 mo ago | 32 32 → 54 (+69%) · sector median +44% | — | WordPressApple iCloud MailMicrosoft 365+21 | — | 1 award |
| 20 | Mirabilis Medica Developer of medical devices for the treatment of uterine fibroids | $29M | 86 mo ago | 8 | — | — | — | — |
| 21 | Carbitex Provider of carbon-fibre induced materials for the fashion industry 48Product top 25%Funding top 32%Moat top 32%Innovation top 33% All 11 signals ▾Producttop 25% Fundingtop 32% Moattop 32% Innovationtop 33% Patentstop 33% Growthtop 40% Talentbottom 49% Techbottom 42% Newsbottom 37% Marketbottom 35% Globalbottom 33% Product: 7 distinct product lines · Company stage: Series C Funding: Raised $28.0M across 6 rounds · 6 rounds over 10 yrs (0.6/yr) rank vs industry peers · Fliar Intelligence Index 48/100 | $28M | 20 mo ago | 43 43 → 26 (-40%) · sector median +44% | Junus Khan Founder & President | Webflow EcommerceWebflowcore-js+13 | 43 patents Anisotropic fiber‑reinforced composites for puncture‑resistant footwear inserts | — |
| 22 | Evrnu Provider of sustainable fabrics from recycled cloths | $27M | 26 mo ago | 22 | Christopher Stanev Co-Founder & President | Node.jsTailwind CSSReact+9 | — | — |
| 23 | Powerit Solutions Demand response solutions | $26M | 145 mo ago | 22 | Kevin Klustner CEO & Board Director | — | 4 patents Smart power demand management and automated charging systems for electrical grids | — |
| 24 | Etubics Therapeutic vaccines for cancer | $23M | 141 mo ago | 14 | — | — | 160 patents Manufacturing adenoviral vectors for multi‑vaccine and cancer immunotherapy applications | — |
| 25 | APANA Sensors and cloud-based analytics platform for water leak detection | $19M | 86 mo ago | 17 | — | — | 31 patents Low‑power IoT smart metering with centralized data collection and consumption analytics | — |
| 26 | Nori Provider of carbon dioxide removal marketplace | $19M | 38 mo ago | 43 | Paul Gambill Co-Founder & CEO | — | — | — |
| 27 | StormSensor Developer of IoT enabled solution to track and prevent stormwater pollution or flooding | $19M | 54 mo ago | 30 | — | — | 14 patents Real-time stormwater flow and depth sensing with tidal decoupling for flood risk modeling | — |
| 28 | InBios Innovating immunodiagnostics for infectious diseases, improving global health outcomes | $18M | 13 mo ago | 73 | Estela Raychaudhuri CEO & President | WordPressMySQLPHP+25 | 24 patents Rapid lateral flow immunoassays for detecting viral and parasitic infectious diseases | — |
| 29 | Climate Vault Provider of solutions for organizations and project developers to mitigate emissions | $16M | 22 mo ago | 41 | — | — | — | — |
| 30 | Ridwell Provider of convenient hard-to-recycle item pickup services | $15M | 6 mo ago | 177 177 → 99 (-44%) · sector median +44% | Ryan Metzger Co-Founder & CEO | SanityApple iCloud MailGoogle Workspace+26 | — | — |
| 31 | Green Canopy NODE Developer of green building communities | $15M | 55 mo ago | 33 33 → 34 (+3%) · sector median +44% | Andy Wolverton Co-Founder | Squarespace CommerceSquarespaceTypeScript+23 | — | — |
| 32 | PowerLight Wireless power delivery systems using laser beams to transmit electricity | $12M | 9 mo ago | 33 | Tom Nugent co-founder | WordPressMySQLPHP+22 | 41 patents Integrated solar PV mounting, tracking, and building‑integrated roofing/shingle systems. | — |
| 33 | Allumia IoT and AI-driven energy management solutions | $10M | 51 mo ago | 37 | Quintin Barnes Co-Founder & VP | — | — | 1 partnership |
| 34 | Peregrine Hydrogen Green hydrogen production | $8M | 11 mo ago | 6 | Stefan Omelchenko Co-Founder / VP of Operations and Strategy | — | 20 patents Efficient sulfur‑dioxide depolarized electrolysis for low‑carbon hydrogen and sulfuric acid production | — |
| 35 | Oscilla Power Provider of wave energy harvesting system | $7M | 46 mo ago | 20 | Balky Nair President and CEO | WixSentryBootstrap+12 | 147 patents Wave energy conversion systems and marine vehicle power integration | 1 award |
| 36 | Housing Kitsap Developer of affordable houses | $6M | 9 mo ago | — | — | DudaFacebook LoginBootstrap+19 | — | — |
| 37 | FlexCharging Provider of electric vehicle charging solutions | $6M | 44 mo ago | 15 | Brian Grunkemeyer Founder & CEO | — | 18 patents Smart electric vehicle charging control and grid demand‑response scheduling systems | — |
| 38 | Iasis Molecular Sciences Molecular solutions provider, launching soon with subscription-based updates | $5M | 20 mo ago | 2 | — | — | — | — |
| 39 | Myno Carbon Provider of bio-char from carbon removal facilities | $5M | 36 mo ago | 13 | Thor Kallestad Founder & CEO | WordPressMySQLPHP+36 | — | — |
| 40 | Abacus Bioscience Developer of immunotherapeutics for treating cancer and viral diseases | $4M | 40 mo ago | 7 | Edward Clark Founder and Chair | GoDaddy Website BuilderReactRequireJS+6 | — | — |
| 41 | Molecule Works Provider of water treatment solutions | $4M | 22 mo ago | — | Wei Liu CEO | — | — | — |
| 42 | Cutsforth Provider of asset monitoring, brush rigging, and electrical system maintenance services | $4M | 13 mo ago | 79 | Dustin Cutsforth Owner | CIO | WordPressApple iCloud MailMicrosoft 365+26 | 185 patents Electrical machine component health monitoring and brush assembly hardware. | — |
| 43 | Vor Systems AI-enabled transaction platform for energy asset transactions | $3M | 3 mo ago | — | Victor Shao Co-Founder & CEO | — | — | — |
| 44 | Violett Manufacturer of air disinfection devices using ultraviolet light and filtration | $3M | 29 mo ago | 21 | Branden Doyle Co-Founder & CEO | — | 7 patents Photonic air purification chambers and UV cyclonic fluid dosing for medical sterilization | — |
| 45 | Homeostasis Developer of technology converting industrial carbon dioxide emissions into carbon materials | $1M | 15 mo ago | — | Makoto Hamamoto Eyre Cofounder + CEO | — | — | — |
| 46 | ClearSign Provider of combustion efficiency enhancement technology solutions | $1M | 16 mo ago | 16 16 → 23 (+44%) · sector median +44% | — | WordPressMySQLPHP+25 | — | 1 launch |
| 47 | Voltair Developer of autonomous drone systems for power grid and wildfire monitoring | $500K | 5 mo ago | — | Ronan Nopp Co-Founder & CEO | Framer SitesThree.jsReact+5 | — | — |
| 48 | Silurian AI Foundation models for simulating Earth's systems | $500K | 24 mo ago | — | Nikhil Shankar Co-Founder | — | — | 1 partnership |
| 49 | Briotech Developer of hypochlorous disinfection solution | $490K | 14 mo ago | 27 27 → 43 (+59%) · sector median +44% | Cynthia Varela Founder | Cart FunctionalityShopifyBootstrap+14 | 32 patents On‑site generation of pure hypochlorous acid for disinfection and sustainable packaging | 1 launch |
| 50 | FarmHQ Smart irrigation control system | $325K | 10 mo ago | 8 | — | WordPressMySQLPHP+33 | — | — |
Top 12 Sustainability Tech companies in Washington
#1
Public · Vancouver, Washington · founded 2002 · 12 employees$249.7Mraised▾
Developer of humanized monoclonal antibodies for the treatment and prevention of HIV infection. It offers lead candidate, PRO 140,for HIV with demonstrated antiviral activity in men. PRO 140 blocks the HIV co-receptor CCR5 on T-cells that prevent viral entry.
- Mar 2026Post IPO$17.5M
- Jan 2026Post IPO$18.6M
- Apr 2022Post IPO$1.9M
- Dec 2021Post IPO$11.4M
#2
Series C · Seattle, Washington · founded 2015 · 192 employees$81.5Mraised▾
Provider of monitoring and maintenance solutions for solar PV systems. It specializes in developing monitoring systems for domestic solar PV systems. It offers a day-to-day monitoring system that is used for risk management and project management of the installed photovoltaic system. Also, provides repair service and maintenance for solar energy system through signed contracts.
- Apr 2025Series C$87M
- Oct 2023Series B$25M
- Sep 2021Series B$36.4M
- Jun 2019Series A$15M
#3
Series B · Seattle, Washington · founded 2018 · 177 employees$15Mraised▾
Provider of convenient hard-to-recycle item pickup services. The company collects hard-to-recycle materials, such as plastic film, batteries, and light bulbs, directly from customers' homes. Using provided bags, customers store these items until bi-weekly pickup. Collected materials are then recycled or reused by vetted partners, diverting waste from landfills. The service aims to simplify the recycling process for consumers and promote sustainable waste management practices.
- Nov 2025Series B$15M
#4
Series B · Seattle, Washington · founded 2016 · 29 employees$32.2Mraised▾
Developer of membranes for the flow battery market. The company is engaged in the development of high-performance membranes to reduce the cost and improve the performance of flow batteries. Its first membrane is built for redox flow batteries, other potential use cases include pharmaceutical purification, fuel cells, and reverse osmosis.
- Jun 2025Series B$20M
- Feb 2025Series B$1M
- Nov 2024Series B$1.9M
- Aug 2023Series B$12.5M
#5
Series B · Seattle, Washington · founded 2017 · 8 employees$86Mraised▾
Developer of vaccines for the treatment of various diseases. The company's product pipeline includes CRV-101, for Herpes Zoster, CRV0-102 used against chicken pox. Other products of the company include CRV-201 used against the respiratory syncytial virus.
- Mar 2025Series B$110M
- Nov 2022Series A$26M
- Jan 2022Series A$60M
#6
Seed · Seattle, Washington · founded 2025$3Mraised▾
AI-enabled transaction platform for energy asset transactions. It streamline transactions and financing for complex renewable energy assets, such as M&A, project finance, and tax equity deals. It processes massive document volumes to extract key insights like site risks, offtake details, and market dynamics, enabling faster due diligence for buyers, sellers, IPPs, lenders, and advisors.
- Mar 2026Seed$3M
#7
Seed · Seattle, Washington · founded 2018 · 32 employees$30.6Mraised▾
HDT Bio is a developer of immunotherapy for the treatment of cancer & infectious diseases. It enhances the body's immunity power to fight against cancer disease. It increases tumor junctions and improves the disruptive capability. It helps in the tumor penetrance and therefore improves the efficacy, of diverse therapeutics including chemotherapeutics like Paclitaxel, Doxil, Cisplatin, antibodies, oncolytic viruses, and cell therapies. It helps in the treatment of breast cancer, ovarian cancer, and many more. It also provides solutions for pathogen agnostic therapeutics that offer solutions against gram-positive and gram-negative bacteria.
- May 2025Grant (prize money)$2.7M
- May 2025Grant (prize money)$1.6M
- May 2025Grant (prize money)$2.2M
- Apr 2025Grant (prize money)$2M
#8
Series D · Seattle, Washington · founded 2016 · 146 employees$137.3Mraised▾
Online renewable energy PPA marketplace. It offers a renewable energy transaction platform connecting power buyers to PPAs from utility-scale wind, solar, and storage projects. The PPA product enables customers of various sizes to access the financial security of fixed-price renewables, economic benefits of at-scale projects, portfolio advantages of geographic & resource diversity, and sophisticated analysis of respected wholesale market experts.
- Jul 2024Series D$65M
- Nov 2023Series C$10M
- Aug 2021Series C$35M
- Jun 2019Series B$20.5M
#9
Series A · Kent, Washington · founded 2007 · 33 employees$12.2Mraised▾
PowerLight is developing wireless power delivery systems using laser beams to transmit electricity without wires, for applications. They have developed a two-part hardware system, consisting of a transmitter and a receiver. The mobile transmitter is capable of delivering tens to thousands of watts of DC power to electric drones (fixed wing or VTOL), over a distance of hundreds of feet to miles away. This ground-to-air recharging will both power the drone and charge the on-board battery while in flight. The transmitter may be based in an SUV, van or other mobile platform or on a static platform or building. The receiver is mounted on the drone and tied into its power system. Winner of 2009 NASA-sponsored Power Beaming competition.
#10
Funding Raised · Seattle, Washington · founded 1996 · 73 employees$18Mraised▾
Innovating immunodiagnostics for infectious diseases, improving global health outcomes. This biotechnology company specializes in the design, development, and manufacture of high-quality immunodiagnostic devices for infectious diseases and biothreats. They strive to improve health outcomes globally by providing superior quality products that are accurate, easy to use, and cost-effective. Their team of scientists and engineers have extensive experience in developing and manufacturing in vitro diagnostic tests, with expertise in infectious diseases. They offer reliable and practical solutions for challenging infectious disease diagnoses. They develop proprietary technologies used to create rapid and ELISA-based immunodiagnostic assays. They also specialize in the development and manufacture of highly specific and well-characterized antibodies and antigens for use in infectious disease research. They are a total solution company with expertise in all facets of the product pipeline, from discovery to application, partnering with private companies, federal laboratories, and academia to bring customers the best scientific solutions for their diagnostic needs. They offer assay development
- May 2025Grant (prize money)$2M
- May 2024Grant (prize money)$1000K
- Nov 2022Grant (prize money)$100K
- Mar 2020Grant (prize money)$598K
#11
Funding Raised · Silverdale, Washington · founded 1982$6.4Mraised▾
Developer of affordable houses
- Sep 2025Grant (prize money)$563.7K
- May 2025Grant (prize money)$513.6K
- Dec 2014Grant (prize money)$611.1K
- Dec 2011Grant (prize money)—
#12
Series A · Seattle, Washington · founded 2023 · 6 employees$7.8Mraised▾
Green hydrogen production. It provides thermodynamic and dual production approach solutions for the production of hydrogen.
- Jul 2025Series A$7.5M
- Jul 2024Grant (prize money)$500K
- Sep 2023Seed$7.8M
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 Washington is moving
A read on the academic research around Climate Adaptation in Washington — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 46 papers.
University of Washington and Washington State University lead Washington's climate-adaptation research, focusing predominantly on flood risk and health impacts, with a contested, concern-heavy tone (25 concern vs. 17 advancement).
- University of Washington26
- Washington State University7
- Washington University in St. Louis4
- Western Washington University3
- University of Washington Bothell3
- Climate change8
- Resilience (materials science)5
- Psychological resilience5
- Flood myth4
- Risk perception4
- Climate change3→9
- Psychological resilience1→3
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.