Radar Companies Environment · San Francisco
Radar · Environment in San Francisco

Best Environment Companies in San Francisco, United States

The 114 best Environment companies in San Francisco, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Recurrent Energy.

114companies tracked
$2.7Bdisclosed funding
0unicorns
48have raised
FLIAR INTELLIGENCE · ENVIRONMENT × SAN FRANCISCO

Our analysis of 90 Environment companies

$38.2b in tracked funding; 89% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.

90companies analysed
89%cloud-native stacks
2025funding peak (by rounds)
3unicorns
2015median founding year
772kcombined LinkedIn audience
57%of audience held by top 3
6companies hiring publicly (12 mo)

Ranked: Best Environment companies in San Francisco

#CompanyDisclosed fundingLast roundEmployeesFoundedFounderWeb popularityPatents & IP focusRecent signals
1Recurrent Energy
Developer of utility-scale solar projects
74Funding top 24%Tech top 28%Growth top 35%Product top 37%
All 10 signals ▾
Fundingtop 24%
Techtop 28%
Growthtop 35%
Producttop 37%
Newstop 38%
Innovationtop 40%
Partnerstop 42%
Moattop 48%
Marketbottom 48%
Globalbottom 39%
Funding: Raised $585M across 9 rounds · 9 rounds over 19 yrs (0.5/yr)
Tech: 42 technologies across 5/8 capability areas · Cloud: Amazon S3, Amazon Web Services
rank vs industry peers · Fliar Intelligence Index 74/100
$585M13 mo ago1102006Top 5M
2Longroad Energy
Developer of utility-scale wind and solar power projects
53Talent top 38%Innovation top 40%Product top 40%Funding top 41%
All 10 signals ▾
Talenttop 38%
Innovationtop 40%
Producttop 40%
Fundingtop 41%
Techtop 44%
Growthtop 45%
Moattop 48%
Marketbottom 44%
Globalbottom 39%
Newsbottom 24%
Talent: 2 named leaders on record · 2 C-suite/founder profiles curated
Innovation: 2 product lines
rank vs industry peers · Fliar Intelligence Index 53/100
$500M30 mo ago153
153 → 232 (+52%)
2016Michael Alvarez
Co-Founder and COO
Top 10M1 internship
3Inertia
Developer of technology pursuing commercialization of fusion energy production
67Funding top 22%Talent top 28%Tech bottom 39%Global bottom 33%
All 4 signals ▾
Fundingtop 22%
Talenttop 28%
Techbottom 39%
Globalbottom 33%
Funding: Raised $450M across 1 rounds · 1 rounds over 1 yrs (1.0/yr)
Talent: 3 named leaders on record · 3 C-suite/founder profiles curated
rank vs industry peers · Fliar Intelligence Index 67/100
$450M4 mo ago2024Andrea Kritcher
Co-Founder
Top 5M1 partnership
4Sunrun
Provider of solar energy services for residential
$297M103 mo ago8,360
8,360 → 10,543 (+26%)
2007Mary Powell
CEO
Top 500k54 patents
Solar photovoltaic mounting hardware and integrated clamp/track systems for panel installation
3 partnerships · 1 award
5Pattern Energy Group
Renewable Energy focused IPP
76Innovation top 20%Funding top 26%Product top 26%Fin. health top 29%
All 10 signals ▾
Innovationtop 20%
Fundingtop 26%
Producttop 26%
Fin. healthtop 29%
Markettop 36%
Growthtop 45%
Techtop 48%
Moattop 48%
Newsbottom 38%
Globalbottom 37%
Innovation: 5 product lines
Funding: Raised $256M across 1 rounds · 1 rounds over 8 yrs (0.1/yr)
rank vs industry peers · Fliar Intelligence Index 76/100
$256M12 mo ago4912013Top 5M
6Spruce
Provider of solar financing services for residential units
$205M85 mo ago14020155 patents
Secure proximity authentication, foldable pet bedding, and DVD/web multimedia authoring technologies.
1 job opening
7MBA Polymers
Provider of recycle plastic services
$153M148 mo ago441992Top 10M85 patents
Advanced recycling and purification technologies for durable‑goods and electronic plastics
8Mission Clean Energy
Developer of solar energy projects
62Funding top 35%Talent bottom 49%Global bottom 48%
All 3 signals ▾
Fundingtop 35%
Talentbottom 49%
Globalbottom 48%
Funding: Raised $55.0M across 1 rounds · 1 rounds over 1 yrs (1.0/yr)
Talent: 1 named leader on record · 1 C-suite/founder profile curated
rank vs industry peers · Fliar Intelligence Index 62/100
$55M15 mo ago312022Max Bakker
CEO
1 job opening
9Renewable Properties
Financial advisory for solar projects development
$45M69 mo ago332017Top 10M2 job openings · 1 expansion
10ECOtality
Retailer of solar products, energy efficient products, and buying guides
$41M156 mo ago291989Don Karner
Co-Founder
Top 50M16 patents
Electric vehicle charging stations and power management systems for EV battery charging
11Aro Homes
Provider of constructing carbon negative green building services
$21M43 mo ago262021Scott Voulgaris
Co-Founder
Top 10M
12Sparq
Innovative microinverter technology transforming solar energy with efficiency, reliability, and…
$14M140 mo ago12009Praveen Jain
CEO and Director of Board
Top 10M8 patents
Wearable safety alerts and performance sensors for emergency response and athletic monitoring
13Ulltrasolar Technology
Enhancing solar power plant performance with innovative QuantumBoost technology
$13M60 mo ago112010Santosh Kumar
Founder and CEO
14Marathon Fusion
Developer of nuclear energy projects
10Funding bottom 49%Tech bottom 47%Talent bottom 45%Global bottom 38%
All 5 signals ▾
Fundingbottom 49%
Techbottom 47%
Talentbottom 45%
Globalbottom 38%
Marketbottom 10%
Funding: Raised $10.9M across 3 rounds · 3 rounds over 4 yrs (0.8/yr)
Tech: 14 technologies across 3/8 capability areas · Cloud: Vercel
rank vs industry peers · Fliar Intelligence Index 10/100
$11M23 mo ago32022Kyle Schiller
CEO
Top 50M1 job opening · 3 internships
153Degrees
Energy Services Company
$10M46 mo ago2552007Dan Kalafatas
Co-Founder
Top 5M5 patents
Linked database integration platforms and social network analysis tools
2 launchs
16Soma
Provider of drinking water services
$10M117 mo ago152012Top 10M
17Earth Force
Provider of environmental management services
$9M42 mo ago152022Justin Dawe
Founder and CEO
Top 50M
18ECO2 Plastics
Provider of plastics recycling services
$6M202 mo ago2007Rod Rougelot
CEO
19Mirion
Provider of radiation detection, measurement, analysis and monitoring products and services
$4M33 mo ago2,8722006Thomas Logan
Founder & CEO
Top 5M28 patents
Radiation detection and personal dosimetry instrumentation for nuclear safety.
1 internship · 1 partnership · 1 award
20Aikido Technologies
Developer of innovative floating wind technologies for clean energy solutions
$4M23 mo ago2022Sam Kanner
Co-Founder & CEO
Top 10M
21Aether Energy
Provider of an AI-powered platform for solar and roofing installers
$3M19 mo ago2023Shelby Bons
Co-Founder & CTO
Top 50M
22BANQloop
Provider of waste management services
$3M47 mo ago112019James Boskovic
Founder & CEO
2 patents
Modular waste container systems for efficient collection and transport
23Nuance Energy
Solar racking solutions and project installers
$3M107 mo ago142013Top 50M
24Plant PV
Technology for improving solar panel efficiency
$2M132 mo ago52010192 patents
Development of novel ornamental petunia, calibrachoa, and salvia cultivars
25Noria Energy
Developer of solar energy projects
19Talent top 38%Funding bottom 39%Global bottom 29%Market bottom 28%
All 4 signals ▾
Talenttop 38%
Fundingbottom 39%
Globalbottom 29%
Marketbottom 28%
Talent: 2 named leaders on record · 2 C-suite/founder profiles curated
Funding: Raised $2.1M across 2 rounds · 2 rounds over 4 yrs (0.5/yr)
rank vs industry peers · Fliar Intelligence Index 19/100
$2M9 mo ago202018Jairo Criollo
Co-Founder
26CPI
Provider of climate finance and policy analysis to support climate action
$2M15 mo ago1672009Thomas Heller
Founder
Top 5M10 patents
Patents concentrated in computing, sensing & instrumentation
2 job openings
27ChargeWheel
Provider of EV charging solutions for electric vehicles
$1M86 mo ago32017Top 50M
28Green Horizon
Provider of eco-friendly modular homes
$950K189 mo ago2009James Pope
Owner
29Powertree Services
Provider of integrated solar, EV charging, and energy storage solutions
$760K157 mo ago2013Stacey Reineccius
CEO
24 patents
Adaptive EV charging hardware and grid‑integrated energy management systems
30SRECTrade
Provider of environmental commodity management, transaction, and technology solutions
$500K181 mo ago54
54 → 27 (-50%)
2007Top 500k
31Solactron
Thin film solar technology company delivering high-efficiency, low-cost solar solutions
$350K160 mo ago22013Jehad Abushama
Founder & CEO
32Nebia
Manufacturer of water filtration, showers, and other products
$340K96 mo ago202013Carlos Gomez Andonaegui
Co-Founder
25 patents
Advanced water flow control and pressure‑compensating showerhead technologies
33DirtSat
Platform providing satellite data and AI for biosolar and storage
$300K36 mo ago22021Christine Tiballi
Founder & CEO
4 patents
IoT-enabled rooftop farming platforms integrating smart‑city sensor data for precision agriculture
34UBA Biologix
Provider of industrial waste water treatment services
$250K108 mo ago92015Kagiso Ubane
Founder & CEO
35Northgate Environmental Management
Provider of water management services
$192K41 mo ago42
42 → 51 (+21%)
1999
36Maverick Bioworks
Provider of biology solutions to industrial and ecological problems
$125K48 mo ago2022Eric Herrera
Co-Founder & CEO
37SolarGaps
Smart solar blinds generating renewable energy and reducing electricity bills
$100K84 mo ago142015Yevgen Erik
CEO
Top 10M

Top 12 Environment companies in San Francisco

#1
Series A · San Francisco, California · founded 2024
$450Mraised

Developer of technology pursuing commercialization of fusion energy production. The company focuses on a direct path to commercial energy using a diode-pumped, solid state laser driving an indirect drive target with Deuterium-Tritium fuel. It aims to retire risk areas in laser design, target fabrication, and power plant design. The company plans to construct a demonstrator fusion power plant.

Fliar Intelligence Index™ 67how this company ranks against its industry peers
Funding
top 22%
Talent
top 28%
Tech
bottom 39%
Global
bottom 33%
Funding: Raised $450M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) · Last round Series A (Feb 2026)
Talent: 3 named leaders on record · 3 C-suite/founder profiles curated
Tech: 8 technologies across 3/8 capability areas · Cloud: Cloudflare · Security: Http/3
Audience (LinkedIn): 5k LinkedIn followers
Activity (LinkedIn): 1 partnerships (incl. LLNL) announced in 12 mo
Funding rounds
  • Feb 2026Series A$450M
Founders & team
Andrea KritcherCo-FounderMike DunneCo-Founder & CTOJeff LawsonCo-Founder & CEO
Investors
Bessemer Venture Partners, Threshold, Long Journey Ventures, Google Ventures
Tech stack
Apple Icloud MailAstroCloudflareGoogle WorkspaceHttp/3Open Graph
#2
Acquired · San Francisco, California · founded 2006 · 110 employees
$585Mraised

Recurrent Energy provides solar power and develops and owns locally-sited solar power systems. The company offers their model via a Power Purchase Agreement (PPA) or Feed-in Tariffs (FiT). In return, their utility, commercial, and government customers achieve energy independence, predictable pricing, and enhanced sustainability.

Fliar Intelligence Index™ 74how this company ranks against its industry peers
Funding
top 24%
Tech
top 28%
Growth
top 35%
Product
top 37%
News
top 38%
Innovation
top 40%
Funding: Raised $585M across 9 rounds · 9 rounds over 19 yrs (0.5/yr) · Last round Conventional Debt (Apr 2025)
Tech: 42 technologies across 5/8 capability areas · Cloud: Amazon S3, Amazon Web Services · Devops: Nginx
Growth: Fresh capital in last 24 mo
Audience (LinkedIn): 109k LinkedIn followers — 14.1% of this cohort's audience · 95 engagements/post (1.8× cohort median)
Funding rounds
  • Apr 2025Conventional Debt$415M
  • Jul 2024Conventional Debt$54.3M
  • Apr 2024Conventional Debt$118.2M
  • Jan 2024Series C$500M
Investors
European Investment Bank, Nomura, Investec, BlackRock, Hudson Clean Energy Partners, Natixis
Tech stack
Amazon S3Amazon Web ServicesAngularAnt DesignApple Icloud MailBluehost
#3
Acquired · San Francisco, California · founded 2013 · 491 employees
$256.1Mraised

Pattern Energy is an independent power company focusing on developing wind power resources. The company owns and operates wind power projects in the United States, Canada and Chile. As on Oct 2015, the total owned capacity is 2,282 MW. The company went public on 26 Sep 2013.

Fliar Intelligence Index™ 76how this company ranks against its industry peers
Innovation
top 20%
Funding
top 26%
Product
top 26%
Fin. health
top 29%
Market
top 36%
Growth
top 45%
Innovation: 5 product lines
Funding: Raised $256M across 1 rounds · 1 rounds over 8 yrs (0.1/yr) · Last round Post IPO (Jun 2025)
Product: 5 distinct product lines · Company stage: Acquired
Audience (LinkedIn): 133k LinkedIn followers — 17.3% of this cohort's audience
Funding rounds
  • Jun 2025Post IPO
  • Oct 2019Post IPO$256.1M
  • Nov 2018Series A
Investors
PSP Investments, CBRE Caledon, CAAT, APG
Tech stack
Apple Icloud MailCloudflareCloudflare Bot ManagementCookiebotDocusignFlickity
#4
Acquired · San Francisco, California · founded 2022 · 31 employees
$55Mraised

Developer of solar energy projects

Fliar Intelligence Index™ 62how this company ranks against its industry peers
Funding
top 35%
Talent
bottom 49%
Global
bottom 48%
Funding: Raised $55.0M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) · Last round Series C (Mar 2025)
Talent: 1 named leader on record · 1 C-suite/founder profile curated
Global: Investors from 1 country beyond United States
Audience (LinkedIn): 6k LinkedIn followers
Hiring (LinkedIn): 1 hiring post in 12 mo (public) · hiring: Director, Senior Director of Development
Activity (LinkedIn): 1 partnerships (incl. rPlus Energies team) announced in 12 mo
Funding rounds
  • Mar 2025Series C$55M
Founders & team
Max BakkerCEO
Investors
Orsted
#5
Series B · San Francisco, California · founded 2016 · 153 employees
$500Mraised

Developer of utility-scale wind and solar power projects

Fliar Intelligence Index™ 53how this company ranks against its industry peers
Talent
top 38%
Innovation
top 40%
Product
top 40%
Funding
top 41%
Tech
top 44%
Growth
top 45%
Talent: 2 named leaders on record · 2 C-suite/founder profiles curated
Innovation: 2 product lines
Product: 2 distinct product lines · Company stage: Series B
Audience (LinkedIn): 24k LinkedIn followers — 3.1% of this cohort's audience · 110 engagements/post (2.0× cohort median)
Funding rounds
  • Nov 2023Conventional Debt$600M
  • Aug 2022Series B$500M
  • Jul 2019Series A
  • Oct 2016Series A
Founders & team
Michael AlvarezCo-Founder and COOPaul GaynorCEO & Co-Founder
Investors
IIP, PenSam, Barclays, HSBC, MEAG, Infratil
Tech stack
Amazon SesAmazon Web ServicesApple Icloud MailCdnjsCloudflareCloudflare Bot Management
#6
Seed · San Francisco, California · founded 2018 · 20 employees
$2.1Mraised

Developer of solar energy projects

Fliar Intelligence Index™ 19how this company ranks against its industry peers
Talent
top 38%
Funding
bottom 39%
Global
bottom 29%
Market
bottom 28%
Talent: 2 named leaders on record · 2 C-suite/founder profiles curated
Funding: Raised $2.1M across 2 rounds · 2 rounds over 4 yrs (0.5/yr) · Last round Grant (prize money) (Sep 2025)
Global: Single-market focus (United States)
Audience (LinkedIn): 2k LinkedIn followers
Funding rounds
  • Sep 2025Grant (prize money)$978.7K
  • Apr 2025Grant (prize money)$1.1M
  • Jan 2022Seed
Founders & team
Jairo CriolloCo-FounderJon WankCEO
Investors
Greenbacker, OSTI
#7
Seed · San Francisco, California · founded 2022 · 3 employees
$10.9Mraised

Developer of renewable energy technology intended for the deployment of fusion power plants. The company's technology supports the evaluation of metal foil pumps in nuclear fusion systems that propel the novel technology into pilot plants, enabling businesses to generate energy that is both clean and abundant.

Fliar Intelligence Index™ 10how this company ranks against its industry peers
Funding
bottom 49%
Tech
bottom 47%
Talent
bottom 45%
Global
bottom 38%
Market
bottom 10%
Funding: Raised $10.9M across 3 rounds · 3 rounds over 4 yrs (0.8/yr) · Last round Seed (Jul 2024)
Tech: 14 technologies across 3/8 capability areas · Cloud: Vercel · Security: Hsts
Talent: 1 named leader on record
Audience (LinkedIn): 5k LinkedIn followers
Hiring (LinkedIn): 1 hiring post in 12 mo (public) · hiring: Research Scientist, Bleet Design
Funding rounds
  • Jul 2024Seed$5.9M
  • Sep 2023Grant (prize money)$449.1K
  • Dec 2022Seed$5M
  • 2022Seed
Founders & team
Kyle SchillerCEO
Investors
1517 Fund, Anglo American, Übermorgen Ventures, Shared Future Fund, Climate Capital, OSTI
Tech stack
Google WorkspaceHstsNext.JsNext.Js App RouterNode.JsOpen Graph
#8
Funding Raised · San Francisco, California · founded 2009 · 167 employees
$1.9Mraised

Provider of climate finance and policy analysis to support climate action. The organization offers expertise to governments, businesses, and financial institutions, assisting them in aligning economic growth with climate change mitigation. It delivers insights into climate finance flows and offers advisory services. The company provides research and recommendations on various topics, including adaptation and resilience, blended finance, climate finance needs, decarbonization, energy access, and sustainable agriculture. It also develops tools and trackers to monitor climate finance and promote transparency.

LinkedIn Pulse recent public activity · Jul 2026
Audience: 160k LinkedIn followers — 20.7% of this cohort's audience
Hiring: 2 hiring posts in 12 mo (public) · momentum +2 · hiring: enthousiasm
Funding rounds
  • Mar 2025Grant (prize money)$1.9M
Founders & team
Thomas HellerFounderBarbara BuchnerGlobal Managing Director
Investors
U.S. Department of State
Tech stack
CloudflareCloudflare Bot ManagementComplianzCore-JsDatatablesDreamhost
#9
Seed · San Francisco, California · founded 2023
$3Mraised

Provider of an AI-powered platform for solar and roofing installers. The platform facilitates the design, sales, and payment processes for building installers. It offers solutions for residential solar, commercial solar, and roofing projects. The platform automates residential solar designs, provides shading engine for production estimates, and streamlines deal management. It also provides a building API, CAD engine, deal pipeline management, analytics, and proposal editing capabilities. The aim is to simplify operations with a single application for solar and roofing installers.

Funding rounds
  • Oct 2024Seed$2.5M
  • 2024Seed$500K
Founders & team
Shelby BonsCo-Founder & CTOZayne SagarCo-Founder & CEO
Investors
Y Combinator, Amino Capital, Climate Capital, Collab Fund
Tech stack
EmotionGoogle WorkspaceHighlight.JsHstsJsdelivrMui
#10
Series A · San Francisco, California · founded 2022
$4Mraised

Developer of innovative floating wind technologies for clean energy solutions.

LinkedIn Pulse recent public activity · Jul 2026
Audience: 2k LinkedIn followers
Funding rounds
  • Jul 2024Grant (prize money)$275K
  • Jun 2024Series A$4M
Founders & team
Sam KannerCo-Founder & CEOJames ReevesCo-FounderBingbin YuCo-Founder
Investors
Azolla Ventures, Propeller, Anthropocene Ventures, Cisco, Sabanc Climate Tech, National Science Foundation
Tech stack
CloudflareCookieyesHstsHttp/3JqueryJsdelivr
#11
Public · San Francisco, California · founded 2007 · 8360 employees
$297Mraised

Provider of solar energy services for residential

LinkedIn Pulse recent public activity · Jul 2026
Audience: 149k LinkedIn followers — 19.3% of this cohort's audience
Activity: 3 partnerships · 1 awards (incl. Renew Home and Tesla) announced in 12 mo
Funding rounds
  • Oct 2017Conventional Debt$244.5M
  • Jul 2016Conventional Debt$33M
  • Jun 2016Conventional Debt$40M
  • Jan 2016Conventional Debt$250M
Founders & team
Mary PowellCEO
Investors
Sequoia Capital, Accel, Foundation Capital, US Bank, Investec, CDPQ
Tech stack
Ab TastyAccessible360Adobe Audience ManagerAmazon CloudfrontAmazon S3Amazon Ses
#12
Acquired · San Francisco, California · founded 2015 · 140 employees
$205Mraised

Provider of solar financing services for residential units

LinkedIn Pulse recent public activity · Jul 2026
Audience: 7k LinkedIn followers
Hiring: 1 hiring post in 12 mo (public) · hiring: Solar Maintenance Technician
Funding rounds
  • May 2019Conventional Debt$208M
  • Jun 2017Series D$25M
  • Dec 2016Conventional Debt$105.4M
  • May 2016Conventional Debt$120M
Investors
HPS Investment Partners, Investec, US Bank, SVB, West Coast Clean Tech, Nama Ventures

Funding & investor landscape

$2.7Btotal disclosed funding
38companies funded
140disclosed rounds
1rounds last 90 days
Most active investors
Climate Capital4 rounds
OSTI4 rounds
DOE3 rounds
Investec3 rounds
National Science Foundation3 rounds
Y Combinator3 rounds
Baseline Ventures2 rounds
Benchmark2 rounds
Bessemer Venture Partners2 rounds
Collab Fund2 rounds

Notable founders

Andrea Kritcher
Co-Founder · Inertia
Mike Dunne
Co-Founder & CTO · Inertia
Max Bakker
CEO · Mission Clean Energy
Michael Alvarez
Co-Founder and COO · Longroad Energy
Paul Gaynor
CEO & Co-Founder · Longroad Energy
Jairo Criollo
Co-Founder · Noria Energy
Jon Wank
CEO · Noria Energy
Kyle Schiller
CEO · Marathon Fusion
Thomas Heller
Founder · CPI
Barbara Buchner
Global Managing Director · CPI
Shelby Bons
Co-Founder & CTO · Aether Energy
Zayne Sagar
Co-Founder & CEO · Aether Energy
Prism market signals · United States · country-scoped Prism corpus, 6,440,608 docs

Market landscape — 10 sub-themes by coverage

Share of Environment coverage by sub-theme.

Regulatory-risk over time rising

Funding & growth over time

funding rising · growth rising

Common questions

How many Environment companies are there in San Francisco, United States?
Radar tracks 114 indexable Environment companies headquartered in San Francisco, United States that meet our profile-completeness bar.
What is the total funding raised by Environment companies in San Francisco, United States?
The Environment companies in San Francisco, United States on this list have raised a combined $2.7B in disclosed equity funding across 38 funded companies.
Which is the highest-funded Environment company in San Francisco, United States?
Recurrent Energy is the highest-funded Environment company in San Francisco, United States, with $585M in disclosed equity funding.
How many Environment companies in San Francisco, United States are funded?
38 of the 114 Environment companies in San Francisco, United States on this list have disclosed at least one equity funding round.
How many Environment unicorns are there in San Francisco, United States?
None of the Environment companies in San Francisco, United States on this list currently has a disclosed valuation of $1B or more.
Who are the top investors in San Francisco, United States Environment companies?
The most active investors in San Francisco, United States Environment companies on this list include Climate Capital, OSTI, DOE, Investec, National Science Foundation.
Riya SenguptaFinancials

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.

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