Best Environment Tech Companies in Seattle, United States
The 63 best Environment Tech companies in Seattle, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Porch Group.
Our analysis of 83 Environment Tech companies
$16.0b in tracked funding; 90% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Environment Tech companies in Seattle
| # | 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 | LevelTen Energy Online renewable energy PPA marketplace | $137M | 23 mo ago | 146 | Bryce Smith Founder & CEO | Webflow EcommerceWebflowAsana+24 | — | 1 job opening |
| 3 | Omnidian Provider of monitoring and maintenance solutions for solar PV systems | $81M | 14 mo ago | 192 | David Kenny Co-Founder & Chief Operating Officer | WordPress Block EditorwpBakeryWordPress+41 | — | — |
| 4 | Deako Manufacturer of modular smart lighting systems and related accessories | $61M | 23 mo ago | 21 | — | Cart FunctionalityWordPressMySQL+47 | 3 patents Smart building energy management with networked occupancy prediction and load control | 1 launch |
| 5 | Optimum Energy SaaS-driven HVAC optimization software for commercial spaces | $41M | 115 mo ago | 47 47 → 106 (+126%) | Larry Stapleton CEO & President | WordPressApple iCloud MailMicrosoft 365+28 | 75 patents Patents concentrated in mechanical & energy engineering | 5 job openings |
| 6 | Inspectify Provider of SaaS-driven inspection management services for professionals and homeowners | $33M | 20 mo ago | 34 34 → 75 (+121%) | Josh Jensen Co-Founder & CEO | Cart FunctionalityRubyTrix+33 | — | 1 launch |
| 7 | 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 | — |
| 8 | Evrnu Provider of sustainable fabrics from recycled cloths | $27M | 27 mo ago | 22 | Christopher Stanev Co-Founder & President | Node.jsTailwind CSSReact+9 | — | — |
| 9 | 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 | — |
| 10 | Nori Provider of carbon dioxide removal marketplace | $19M | 38 mo ago | 43 | Paul Gambill Co-Founder & CEO | — | — | — |
| 11 | 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 | — |
| 12 | Climate Vault Provider of solutions for organizations and project developers to mitigate emissions | $16M | 22 mo ago | 41 | — | — | — | — |
| 13 | Ridwell Provider of convenient hard-to-recycle item pickup services | $15M | 7 mo ago | 177 177 → 99 (-44%) | Ryan Metzger Co-Founder & CEO | SanityApple iCloud MailGoogle Workspace+26 | — | — |
| 14 | Calico Energy Connectivity platform for integration of all small grid appliances | $13M | 104 mo ago | 24 24 → 29 (+21%) | Matthew Haak Co- Founder & Director | — | — | — |
| 15 | Wally Provider of connected water leak detectors | $13M | 136 mo ago | 11 | Shwetak Patel Co-Founder | — | 2 patents Personalized marketing systems for generating and delivering targeted offers | — |
| 16 | Allumia IoT and AI-driven energy management solutions | $10M | 51 mo ago | 37 | Quintin Barnes Co-Founder & VP | — | — | 1 partnership |
| 17 | Drift Offering solutions for energy trading and tracking | $9M | 104 mo ago | 3 | Ed McKenzie Co-Founder | — | — | — |
| 18 | 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 | — |
| 19 | 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 |
| 20 | Optio3 IoT based web platform to monitor energy consumption in commercial buildings | $6M | 73 mo ago | 15 | — | — | — | — |
| 21 | Vor Systems AI-enabled transaction platform for energy asset transactions | $3M | 3 mo ago | — | Victor Shao Co-Founder & CEO | — | — | — |
| 22 | Buildpulse SaaS-driven analytics solutions for buildings | $3M | 97 mo ago | 17 | — | — | 8 patents Automated sensor discovery, classification, and airflow control for HVAC building automation systems. | — |
| 23 | Scope 5 ESG reporting and sustainability software, data integration, and consulting services | $2M | 94 mo ago | 14 | — | WordPressMySQLPHP+28 | 44 patents Variable travel valve timing mechanisms for internal combustion engines | — |
| 24 | Microplanet Technology Voltage regulation products for utilities | $1M | 149 mo ago | — | Brett Ironside CEO | — | 7 patents Electronic power conversion and control systems for regulated power electronics | — |
| 25 | Optimum Energy Online platform offering HVAC management solutions | $1M | 188 mo ago | 47 | — | — | 75 patents Advanced HVAC energy optimization and predictive free‑cooling for building grid integration | — |
| 26 | ClearSign Provider of combustion efficiency enhancement technology solutions | $1M | 16 mo ago | 16 16 → 23 (+44%) | — | WordPressMySQLPHP+25 | — | 1 launch |
| 27 | Ario Healthy lighting solutions mimicking natural light for better health and well-being | $1M | 116 mo ago | 3 | — | — | — | — |
| 28 | BlueDot Photonics Manufacturer of nanotech-enabled solar panels and photonic devices | $1M | 61 mo ago | 2 | Matthew Crane Co-Founder | — | — | — |
| 29 | LumiSands Develop silicon nano-materials to replace REE phosphors in LEDs | $180K | 161 mo ago | — | Chang Ching Tu Founder & CEO | — | — | — |
Top 12 Environment Tech companies in Seattle
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
Series B · Seattle, Washington · founded 2015 · 21 employees$60.7Mraised▾
Manufacturer of modular smart lighting systems and related accessories. The company provides smart switches, dimmers, plugs, and simple switches, including motion sensor, nightlight, timer, and ceiling fan controllers. It also offers whole-home solutions, backplates, and faceplates. The company's lighting systems allow users to personalize lighting based on lifestyle.
- Jun 2024Series B$3.4M
- Oct 2022Series B$13.4M
- Mar 2021Series B$12.5M
- May 2020Series B$751.1K
#8
Series B · Seattle, Washington · founded 2019 · 34 employees$32.8Mraised▾
Provider of SaaS-driven inspection management services for professionals and homeowners. Solutions are provided for inspectors, real estate professionals, and home buyers. Users can book home inspections by providing the address or the location of the house.
- Sep 2024Series B$15.5M
- Jul 2023Series A$5.8M
- Nov 2021Series A$11.4M
- Aug 2020Seed$150K
#9
Public · Seattle, Washington · founded 2013 · 1800 employees$718.3Mraised▾
Provides software & service to home improvement industries. It provides an inspection support network, home inspection software, an online marketplace to book professional movers to pack, load, and haul their goods, roofing software, concierge service & more.
- Apr 2023Post IPO$333.3M
- Sep 2021Post IPO$385M
#10
Series A · Seattle, Washington · founded 2020 · 41 employees$15.9Mraised▾
Provider of solutions for organizations and project developers to mitigate emissions. The company offers options for compliance market reductions, super pollutant mitigation, and durable carbon removals. It vets carbon removal projects ensuring permanence, additionality, and transparency. The company aims to align near-term action with long-term net zero goals.
- Jul 2024Series A$3.3M
- Apr 2024Series A$3.2M
- Mar 2023Series A$9.4M
#11
Series B · Seattle, Washington · founded 2014 · 22 employees$27.2Mraised▾
Provider of sustainable fabrics from recycled cloths. The offering includes regenerative cellulose-based fibers, regenerative polyester, and bioengineered fibers. The company claims the products are made by diverting textiles from landfills preventing greenhouse gas emissions. It is also an alternative to nylon, polyester, and more.
- Mar 2024Series B$375K
- Aug 2023Series B$2.7M
- Mar 2023Series B$200K
- Oct 2021Series B$15M
#12
Public · Seattle, Washington · founded 2008 · 16 employees$1.2Mraised▾
Provider of combustion efficiency enhancement technology solutions. The company offers Duplex and Electrodynamic Combustion Control platform technologies that enhance the performance of combustion systems in a broad range of markets, including the chemical, petrochemical, refinery, power, and commercial boiler industries. Additionally, it offers retrofit strategies for superior emissions control and improved performance during combustion.
- Jan 2025Grant (prize money)$400K
- Jun 2024Post IPO$4.3M
- Apr 2024Post IPO$5M
- Jun 2022Grant (prize money)$1.9M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Environment Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Environmental Monitoring is moving in the United States
A read on the academic research around Environmental Monitoring — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 3,039 United States-affiliated papers.
- United States Geological Survey157
- Cary Institute of Ecosystem Studies112
- Environmental Protection Agency84
- National Research Council79
- National Park Service76
- Software deployment2→31
- Pollution3→27
- Air quality index1→25
- Water quality10→34
- Air pollution3→25
- Air quality index14→60
- Air pollution8→51
- Pollutant4→32
- Sampling (signal processing)14→42
- Water quality23→48
- Human health1→32
- Pollution4→33
- Air quality index6→31
- Pollutant6→28
- Biodiversity1→22
Where environmental monitoring is researched across United States
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Who's filing environmental monitoring patents in the United States
United States environmental monitoring patent filing is accelerating — 450 filings from 343 assignees (2016–2025), led by LEEO, Valencell, United Parcel Service; annual filings 47→49.
- LEEO41
- Valencell25
- United Parcel Service21
- Honeywell INT20
- Apple18
- Venturedyne18
- Pillar TECH17
- IND Scient16
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.