Radar · Environment in San Diego
Best Environment Companies in San Diego, United States
The 80 best Environment companies in San Diego, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Sempra Energy.
By Riya SenguptaFinancials
80companies tracked
$1.4Bdisclosed funding
0unicorns
25have raised
FLIAR INTELLIGENCE · ENVIRONMENT × SAN DIEGO
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
369kcombined LinkedIn audience
67%of audience held by top 3
5companies hiring publicly (12 mo)
Ranked: Best Environment companies in San Diego
| # | Company | Disclosed funding | Last round | Employees | Stage | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Sempra Energy Developer of utility projects | $750M | 156 mo ago | 4,774 4,774 → 2,577 (-46%) | Public | Jeffrey Martin CEO | DrupalApple iCloud MailMariaDB+30 | — | 1 award |
| 2 | OneRoof Energy Offers residential rooftop services | $330M | 115 mo ago | 33 | Deadpooled | — | — | — | — |
| 3 | PowerFlex Provider of renewable energy project development services | $100M | 42 mo ago | 300 | Acquired | — | WebflowSalesforceAmazon Web Services+23 | — | — |
| 4 | Borrego Solar Solar EPC | $61M | 166 mo ago | 302 302 → 169 (-44%) | Series C | Chris Anderson Co-Founder | — | — | — |
| 5 | UpWind Solutions Wind Turbine Operation & Maintenance provider | $50M | 167 mo ago | 310 | Acquired | — | — | — | — |
| 6 | Pathway Power Developer of solar and wind energy projects 19Funding top 36%Talent bottom 49%Global bottom 36%Market bottom 20% All 4 signals ▾Fundingtop 36% Talentbottom 49% Globalbottom 36% Marketbottom 20% Funding: Raised $36.0M across 2 rounds · 2 rounds over 4 yrs (0.5/yr) Talent: 1 named leader on record · 1 C-suite/founder profile curated rank vs industry peers · Fliar Intelligence Index 19/100 | $36M | 19 mo ago | 10 | Series C | Jared Quient Founder and Managing Partner | — | — | 2 partnerships |
| 7 | Algenesis Provider of air management services 57Innovation top 25%Patents top 32%Funding top 38%Moat bottom 49% All 6 signals ▾Innovationtop 25% Patentstop 32% Fundingtop 38% Moatbottom 49% Globalbottom 39% Marketbottom 34% Innovation: 12 patents (top 37% of patent-holders) · 11 filings since 2022 vs 1 in 2017-21 Patents: 12 patents matched (strict assignee match) · 11 filings since 2022 vs 1 in 2017-21 rank vs industry peers · Fliar Intelligence Index 57/100 | $11M | 20 mo ago | 19 | Seed | — | — | 12 patents Algae-derived polyester polyols for biodegradable thermoplastic polyurethane production | 2 partnerships |
| 8 | MCPV Manufacturer of heterojunction solar cells and modules for solar energy projects 24Talent bottom 49%Funding bottom 41%Global bottom 25% All 3 signals ▾Talentbottom 49% Fundingbottom 41% Globalbottom 25% Talent: 1 named leader on record · 1 C-suite/founder profile curated Funding: Raised $10.9M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) rank vs industry peers · Fliar Intelligence Index 24/100 | $11M | 14 mo ago | — | Funding Raised | Marc Rechter Co-Founder & CEO | — | — | — |
| 9 | Nexus eWater Provider of grey water recycle technology solutions | $9M | 115 mo ago | — | Series A | Craig Richmond Co-Founder and Executive Vice President | — | — | — |
| 10 | Cloud Water Filters Provider of water filter services 29Growth top 35%Tech top 43%Funding top 49%Talent bottom 45% All 6 signals ▾Growthtop 35% Techtop 43% Fundingtop 49% Talentbottom 45% Globalbottom 25% Marketbottom 14% Growth: Fresh capital in last 24 mo Tech: 25 technologies across 4/8 capability areas · Cloud: Amazon Cloudfront, Amazon Web Services rank vs industry peers · Fliar Intelligence Index 29/100 | $5M | 17 mo ago | 6 | Seed | Nick Braun Co-Founder | Cart FunctionalitySentryNode.js+21 | — | — |
| 11 | Equal Earth Solar IPP company | $3M | 147 mo ago | 11 | Deadpooled | Andrew Duggan CEO | — | — | — |
| 12 | Hyperlight Energy Solar fresnel and CSP technology developer | $2M | 145 mo ago | — | Series A | — | — | — | — |
| 13 | Primo Energy Solar panel & products installation company | $2M | 81 mo ago | 8 | Seed | Hayden Van Zanten Co-Founder | — | — | — |
| 14 | Luminia Commercial property solar & sustainability financing solutions | $1M | 80 mo ago | 23 | Seed | — | WordPressMySQLPHP+34 | — | — |
| 15 | Powur Provider of solar energy services for homes | $1M | 122 mo ago | 127 | Seed | — | WordPressApple iCloud MailGoogle Workspace+28 | — | — |
| 16 | Hauler Hero Provider of waste recycling services 50Growth top 28%Tech top 31%Funding top 41%Product top 47% All 8 signals ▾Growthtop 28% Techtop 31% Fundingtop 41% Producttop 47% Talentbottom 49% Globalbottom 36% Marketbottom 32% Customersbottom 5% Growth: Web rank 5,000,000 → 1,000,000 YoY · Fresh capital in last 24 mo Tech: 33 technologies across 5/8 capability areas · Cloud: Cloudflare, Google Cloud rank vs industry peers · Fliar Intelligence Index 50/100 | $1M | 6 mo ago | 15 | Series A | Mark Hoadley CEO | Firebasestyled-componentsJSS+16 | — | — |
| 17 | Prabhu Energy Labs Provider of methane emissions reduction services | $1M | 13 mo ago | — | Funding Raised | Edan Prabhu Founder & CEO | — | — | — |
| 18 | Uprise Energy Portable wind turbine solutions for clean, low-cost, off-grid power | $750K | 102 mo ago | 14 | Seed | — | Squarespace CommerceSquarespaceZoho+13 | — | — |
| 19 | Greenbutts Provider of plastic recycling services 42Patents top 34%Growth top 35%Innovation top 39%Funding top 45% All 9 signals ▾Patentstop 34% Growthtop 35% Innovationtop 39% Fundingtop 45% Moattop 45% Talentbottom 49% Techbottom 46% Globalbottom 40% Marketbottom 19% Patents: 22 patents matched (strict assignee match) · 10 filings since 2022 vs 2 in 2017-21 Growth: Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 42/100 | $304K | 5 mo ago | 8 | Seed | Tadas Lisauskas Co-Founder | WixSentryBootstrap+9 | 22 patents Manufacturing and processing of cigarette filter rods and fiber cell structures | — |
| 20 | Gemini Energy Services Wind and solar energy services: maintenance, engineering, and major component support | $200K | 194 mo ago | 120 | Public | — | — | — | — |
| 21 | Icarus Thermal heat absorption and energy production solution for solar PV modules | $170K | 55 mo ago | 10 | Seed | — | — | 2 patents Integrated solar PV‑thermal co‑generation systems for combined electricity and heat production | — |
| 22 | CollectiveSun Provider of solar financing and power agreements for nonprofits | $150K | 80 mo ago | 6 | Seed | — | WordPressZohoMySQL+23 | — | — |
| 23 | PI Energy Developer of cost-disruptive, waferless solar photovoltaic materials for rooftop installations | $101K | 25 mo ago | 5 | Seed | Phil Layton Founder & CEO | — | 1,199 patents Advanced power generation, fluid control, and uranium processing for oil/gas and nuclear sectors | — |
Top 12 Environment companies in San Diego
#1
Series A · San Diego, California · founded 2020 · 15 employees$1.1Mraised▾
Series A · San Diego, California · founded 2020 · 15 employees
Provider of waste recycling services
Fliar Intelligence Index™ 50how this company ranks against its industry peers
Growth
top 28%Tech
top 31%Funding
top 41%Product
top 47%Talent
bottom 49%Global
bottom 36%Growth: Web rank 5,000,000 → 1,000,000 YoY · Fresh capital in last 24 mo
Tech: 33 technologies across 5/8 capability areas · Cloud: Cloudflare, Google Cloud · Devops: Nginx
Funding: Raised $1.1M across 3 rounds · 3 rounds over 2 yrs (1.5/yr) · Last round Series A (Nov 2025)
Audience (LinkedIn): 4k LinkedIn followers
Funding rounds
- Nov 2025Series A$16M
- Dec 2024Seed$10M
- Seed$1.1M
Founders & team
Investors
I2BF Global Ventures, K5 Global, Somersault Ventures, Recall Capital, Frontier Growth
Tech stack
CloudflareCloudflare Bot ManagementCore-JsEmotionFirebaseGoogle Analytics
#2
Series C · San Diego, California · founded 2022 · 10 employees$36Mraised▾
Series C · San Diego, California · founded 2022 · 10 employees
Developer of solar and wind energy projects
Fliar Intelligence Index™ 19how this company ranks against its industry peers
Funding
top 36%Talent
bottom 49%Global
bottom 36%Market
bottom 20%Funding: Raised $36.0M across 2 rounds · 2 rounds over 4 yrs (0.5/yr) · Last round Conventional Debt (Nov 2024)
Talent: 1 named leader on record · 1 C-suite/founder profile curated
Global: Investors from 2 countries beyond United States
Audience (LinkedIn): 781 LinkedIn followers
Activity (LinkedIn): 2 partnerships (incl. Igneo Infrastructure Partners) announced in 12 mo
Funding rounds
- Nov 2024Conventional Debt—
- Jan 2024Series C$25M
- Sep 2022Series C$36M
Founders & team
Investors
The Forest Road Company, Rabobank, Renova
#3
Funding Raised · San Diego, California · founded 2020$10.9Mraised▾
Funding Raised · San Diego, California · founded 2020
Manufacturer of heterojunction solar cells and modules for solar energy projects. It focuses on advancing multi-gigawatt cell and module manufacturing. The company develops advanced manufacturing capacity of HJT cells and modules. It emphasizes sustainability in operations, dedicated to the recyclability and sustainable production of solar cells and modules. The company aims to accelerate innovation in the solar manufacturing landscape, combining technology improvements with industry partnerships and customer collaboration in product design and downstream solutions.
Fliar Intelligence Index™ 24how this company ranks against its industry peers
Talent
bottom 49%Funding
bottom 41%Global
bottom 25%Talent: 1 named leader on record · 1 C-suite/founder profile curated
Funding: Raised $10.9M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) · Last round Grant (prize money) (Apr 2025)
Global: Single-market focus (United States)
Audience (LinkedIn): 956 LinkedIn followers
Funding rounds
- Apr 2025Grant (prize money)$10.9M
Founders & team
Investors
Miteco
#4
Seed · San Diego, California · founded 2010 · 8 employees$303.9Kraised▾
Seed · San Diego, California · founded 2010 · 8 employees
Provider of plastic recycling services
Fliar Intelligence Index™ 42how this company ranks against its industry peers
Patents
top 34%Growth
top 35%Innovation
top 39%Funding
top 45%Moat
top 45%Talent
bottom 49%Patents: 22 patents matched (strict assignee match) · 10 filings since 2022 vs 2 in 2017-21 · Latest publication 2026
Growth: Fresh capital in last 24 mo
Innovation: 22 patents (top 49% of patent-holders) · 10 filings since 2022 vs 2 in 2017-21
Audience (LinkedIn): 642 LinkedIn followers
Funding rounds
- Jan 2026Seed$172.6K
- Sep 2025Seed$197.8K
- Mar 2025Seed$512.5K
- Jan 2025Seed$246.9K
Founders & team
Investors
Shiva Capital
Tech stack
BootstrapGoogle CloudGoogle Cloud CdnGsapHstsHttp/3
#5
Seed · San Diego, California · founded 2016 · 19 employees$11.2Mraised▾
Seed · San Diego, California · founded 2016 · 19 employees
Provider of air management services
Fliar Intelligence Index™ 57how this company ranks against its industry peers
Innovation
top 25%Patents
top 32%Funding
top 38%Moat
bottom 49%Global
bottom 39%Market
bottom 34%Innovation: 12 patents (top 37% of patent-holders) · 11 filings since 2022 vs 1 in 2017-21
Patents: 12 patents matched (strict assignee match) · 11 filings since 2022 vs 1 in 2017-21 · Latest publication 2026
Funding: Raised $11.2M across 6 rounds · 6 rounds over 7 yrs (0.9/yr) · Last round Seed (Oct 2024)
Audience (LinkedIn): 4k LinkedIn followers
Activity (LinkedIn): 2 partnerships (incl. colorFabb) announced in 12 mo
Funding rounds
- Oct 2024Seed$3M
- Apr 2023Seed$5M
- Jan 2023Grant (prize money)$5M
- Jul 2022Seed$847.1K
Investors
DOE, First Bight Ventures, Circulate Capital, MIH Ventures, RhinoShield, Diamond Sports
#6
Seed · San Diego, California · founded 2019 · 6 employees$4.8Mraised▾
Seed · San Diego, California · founded 2019 · 6 employees
Operator of a water filtration system intended to create a network for water quality analysis. The company utilizes built-in software to monitor the toxin-free, nutrient-rich water, and track water's pH to alkaline levels by adding essential trace minerals like calcium and magnesium back into the purified water for better tasting, hydration and ensuring safe drinking water to be delivered, enabling customers to have access to toxin-free, nutrient-rich water.
Fliar Intelligence Index™ 29how this company ranks against its industry peers
Growth
top 35%Tech
top 43%Funding
top 49%Talent
bottom 45%Global
bottom 25%Market
bottom 14%Growth: Fresh capital in last 24 mo
Tech: 25 technologies across 4/8 capability areas · Cloud: Amazon Cloudfront, Amazon Web Services · Observability: Sentry
Funding: Raised $4.8M across 3 rounds · 3 rounds over 5 yrs (0.6/yr) · Last round Seed (Jan 2025)
Funding rounds
- Jan 2025Seed$1M
- Jun 2022Seed$2.3M
- Oct 2021Seed$1.5M
Founders & team
Tech stack
Amazon CloudfrontAmazon Web ServicesCart FunctionalityCore-JsDetectifyFacebook Pixel
#7
Funding Raised · San Diego, California · founded 2019$1Mraised▾
Funding Raised · San Diego, California · founded 2019
Provider of methane emissions reduction services
LinkedIn Pulse recent public activity · Jul 2026
Audience: 239 LinkedIn followers
Funding rounds
- May 2025Grant (prize money)$1M
Founders & team
Investors
OSTI
#8
Acquired · San Diego, California · founded 2017 · 300 employees$100Mraised▾
Acquired · San Diego, California · founded 2017 · 300 employees
Provider of renewable energy project development services
LinkedIn Pulse recent public activity · Jul 2026
Audience: 35k LinkedIn followers — 9.6% of this cohort's audience
Funding rounds
- Dec 2022Series A$100M
- Sep 2018Grant (prize money)$744K
- Sep 2017Grant (prize money)$150K
- Jul 2017Grant (prize money)$225K
Investors
CalSEED, Wells Fargo Innovation Incubator, Manulife Investment Management, America’s Seed Fund, Innovation Incubator
Tech stack
CloudflareCloudflare Bot ManagementCrazy EggDocusignGoogle AnalyticsGoogle Tag Manager
#9
Public · San Diego, California · founded 1968 · 4774 employees$750Mraised▾
Public · San Diego, California · founded 1968 · 4774 employees
Sempra Energy is a natural gas utilities holding company. Their products include electric, natural gas and other energy products and services. Its primary competitors are Dominion, Edison and MDU Resources Group. The company has operations worldwide.In 2022, the company recorded annual revenues of $14.43B and a net profit of $2.13B.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 66k LinkedIn followers — 17.9% of this cohort's audience
Activity: 1 awards announced in 12 mo
Founders & team
Investors
ADIA, KKR
Tech stack
Alpine.JsAmazon AlbAmazon CloudfrontAmazon Web ServicesApache Http ServerApple Icloud Mail
#10
Deadpooled · San Diego, California · founded 2009 · 33 employees$330.2Mraised▾
Deadpooled · San Diego, California · founded 2009 · 33 employees
OneRoof Energy develops and distributes solar energy generation systems. The company also provides solar roofing systems installation and support services. OnRoof Energy has a strategic partnership with Eagle Roofing Products.
Funding rounds
- Nov 2016Post IPO$17M
- Jun 2016Venture Debt$50M
- Mar 2016Post IPO$20M
- Dec 2015Venture Debt$20M
Investors
Spindrift Equities, Black Coral Capital, North Sky Capital, Hanwha, EnergyNa, US Bank
Tech stack
PhpLitespeedGoogle Font ApiHostingerHttp/3
#11
Series C · San Diego, California · founded 1980 · 302 employees$61.4Mraised▾
Series C · San Diego, California · founded 1980 · 302 employees
Borrego Solar Systems specializes in commercial, residential and public sector turnkey, grid connected solar electric systems. The company has a portfolio of over 1100 solar PV projects and has offices in california, massachusetts and New York, and provides installation and services the USA.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 28k LinkedIn followers — 7.6% of this cohort's audience
Funding rounds
- Aug 2012Series C$17.4M
- Feb 2012Conventional Debt$47M
- Aug 2009Series B$30M
- Feb 2009Series A$14M
Founders & team
Investors
US Bank, East West Bank, National Cooperative Bank, Walsin
Tech stack
WordpressMysqlPhpGoogle CloudYoast Seo PremiumYoast Seo
#12
Acquired · San Diego, California · founded 2007 · 310 employees$50.3Mraised▾
Acquired · San Diego, California · founded 2007 · 310 employees
UpWind Solutions is an independent service provider for O&M services to the wind industry in US. The company's services include maintenance services, parts and logistics capabilities, repairs and upgrades, and warranty services. The company's latest offering UpWind Insight™ uses big data analytics to provide services across the O&M value chain.
Funding rounds
- Jul 2012Series B$10M
- Mar 2011Series B$10M
- Mar 2010Series B$28.8M
- 2007Series A$1.5M
Investors
MissionPoint Partners, Kleiner Perkins, BP Ventures, Northgate Capital, G2 Venture Partners
Funding & investor landscape
$1.4Btotal disclosed funding
23companies funded
78disclosed rounds
0rounds last 90 days
Most active investors
Notable founders
Mark Hoadley
CEO · Hauler Hero
Jared Quient
Founder and Managing Partner · Pathway Power
Marc Rechter
Co-Founder & CEO · MCPV
Tadas Lisauskas
Co-Founder · Greenbutts
Nick Braun
Co-Founder · Cloud Water Filters
Edan Prabhu
Founder & CEO · Prabhu Energy Labs
Jeffrey Martin
CEO · Sempra Energy
Chris Anderson
Co-Founder · Borrego Solar
James Rickard
ex-Co-Founder · Borrego Solar
Craig Richmond
Co-Founder and Executive Vice President · Nexus eWater
Phil Layton
Founder & CEO · PI Energy
Andrew Duggan
CEO · Equal Earth
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
RESEARCH SIGNALS · United States
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.
research sentiment over time
200820172026
enthusiastic · positive · guarded tone
Tone is overwhelmingly optimistic and softening — the enthusiastic (strongly-positive) share moved 41% → 38% across 2008–2026.
top research entities
- United States Geological Survey157
- Cary Institute of Ecosystem Studies112
- Environmental Protection Agency84
- National Research Council79
- National Park Service76
leading researchers
Kelly, Vicky · Kelly, Victoria · Catalyst Cooperative · U.S. DOE EM · McIntyre, Cheryl · Stocker-Waldhuber, Martin · Seiser, Bernd · Hartl, Lea
▲
Breakthroughs481 · 16%
▲ 12%→18% share
▲1.5× share momentum0 median citations77% since 2021mostly methods-led
Breakthroughs are rising (12%→18% of field), led by Software deployment.
rising sub-themes (early→recent)
- Software deployment2→31
- Pollution3→27
- Air quality index1→25
- Water quality10→34
- Air pollution3→25
Newly emergingScalability 0→21 · Biodiversity 0→18 · Climate change 0→14
Landmark Environmental sensor networks in ecological research · 165 cites
◆
Advancements804 · 26%
▼ 31%→24% share
▼0.8× share momentum0 median citations64% since 2021mostly methods-led
Advancements are cooling (31%→24% of field), led by Air quality index.
rising sub-themes (early→recent)
- Air quality index14→60
- Air pollution8→51
- Pollutant4→32
- Sampling (signal processing)14→42
- Water quality23→48
Newly emergingKey (lock) 0→17 · Range (aeronautics) 0→10 · Microplastics 0→10
Landmark Tracking complex mixtures of chemicals in our changing environment · 716 cites
▼
Concerns626 · 21%
▼ 21%→20% share
▲1.0× share momentum0 median citations68% since 2021mostly empirical
Concerns are cooling (21%→20% of field), led by Human health.
rising sub-themes (early→recent)
- Human health1→32
- Pollution4→33
- Air quality index6→31
- Pollutant6→28
- Biodiversity1→22
Newly emergingMicroplastics 0→19 · Agriculture 0→18 · Marine debris 0→14
Landmark Past, present, and future perspectives of environmental DNA (eDNA) metabarcoding: A systematic review in methods, monito · 1,184 cites
RESEARCH HOTSPOTS · United States
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.
SF Bay Area80 · +0.27
Boston61 · +0.43
New York54 · +0.35
Seattle53 · +0.24
Los Angeles37 · +0.39
San Diego33 · +0.26
Atlanta32 · +0.25
Ann Arbor22 · +0.24
Pittsburgh19 · +0.37
Philadelphia19 · +0.41
PATENT SIGNAL · United States
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.
450 filings343 assigneespeak 60/yr2016–2025
filing momentum (YoY 2016–2025)
top patent filers
- LEEO41
- Valencell25
- United Parcel Service21
- Honeywell INT20
- Apple18
- Venturedyne18
- Pillar TECH17
- IND Scient16
Common questions
How many Environment companies are there in San Diego, United States?
Radar tracks 80 indexable Environment companies headquartered in San Diego, United States that meet our profile-completeness bar.
What is the total funding raised by Environment companies in San Diego, United States?
The Environment companies in San Diego, United States on this list have raised a combined $1.4B in disclosed equity funding across 23 funded companies.
Which is the highest-funded Environment company in San Diego, United States?
Sempra Energy is the highest-funded Environment company in San Diego, United States, with $750M in disclosed equity funding.
How many Environment companies in San Diego, United States are funded?
23 of the 80 Environment companies in San Diego, United States on this list have disclosed at least one equity funding round.
How many Environment unicorns are there in San Diego, United States?
None of the Environment companies in San Diego, United States on this list currently has a disclosed valuation of $1B or more.
Who are the top investors in San Diego, United States Environment companies?
The most active investors in San Diego, United States Environment companies on this list include EvoNexus, America’s Seed Fund, CalSEED, DOE, 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.