Best Sustainability Tech Companies in California, United States
The 1764 best Sustainability Tech companies in California, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: View.
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 California
| # | Company | Disclosed funding | Last round | Employees | Founded | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|
| 1 | Redaptive 🦄 Provider of fully-funded energy efficiency and sustainability solutions. 60Funding top 16%Moat top 26%Product top 30%Market top 37% All 9 signals ▾Fundingtop 16% Moattop 26% Producttop 30% Markettop 37% Talenttop 38% Globaltop 48% Techtop 49% Growthbottom 40% Newsbottom 21% Funding: Raised $726M across 11 rounds · 11 rounds over 11 yrs (1.0/yr) Moat: Editorial + unicorn rating 9/10 · Unicorn rank vs industry peers · Fliar Intelligence Index 60/100 | $726M | 13 mo ago | 326 | 2015 | — | — |
| 2 | Mainspring Energy Developer of onsite linear power generators 82Patents top 16%Funding top 18%Innovation top 21%Moat top 24% All 10 signals ▾Patentstop 16% Fundingtop 18% Innovationtop 21% Moattop 24% Talenttop 28% Growthtop 32% Techtop 36% Markettop 45% Globalbottom 47% Newsbottom 18% Patents: 166 patents matched (strict assignee match) · 113 filings since 2022 vs 52 in 2017-21 Funding: Raised $518M across 5 rounds · 5 rounds over 9 yrs (0.6/yr) rank vs industry peers · Fliar Intelligence Index 82/100 | $518M | 14 mo ago | 114 | 2010 | 166 patents Patents concentrated in mechanical & energy engineering | — |
| 3 | Fervo Energy Developer of next-generation geothermal projects delivering carbon-free energy 57Funding top 8%Talent top 34%News top 39%Partners top 45% All 9 signals ▾Fundingtop 8% Talenttop 34% Newstop 39% Partnerstop 45% Growthtop 47% Techtop 48% Moattop 48% Marketbottom 44% Globalbottom 39% Funding: Raised $420M across 12 rounds · 12 rounds over 5 yrs (2.4/yr) Talent: Analyst team rating 4/5 · 2 named leaders on record rank vs industry peers · Fliar Intelligence Index 57/100 | $420M | 3 mo ago | 49 | 2017 | — | 1 launch · 3 partnerships |
| 4 | Twelve Developer of carbon transformation technology producing fuels and feedstock products 78Funding top 16%Patents top 23%Moat top 26%Talent top 28% All 10 signals ▾Fundingtop 16% Patentstop 23% Moattop 26% Talenttop 28% Innovationtop 29% Growthtop 38% Markettop 41% Techtop 41% Globalbottom 49% Newsbottom 24% Funding: Raised $387M across 19 rounds · 19 rounds over 10 yrs (1.9/yr) Patents: 301 patents matched (strict assignee match) · 127 filings since 2022 vs 131 in 2017-21 rank vs industry peers · Fliar Intelligence Index 78/100 | $387M | 13 mo ago | 232 232 → 267 (+15%) · sector median +10% | 2015 | 301 patents Patents concentrated in health & consumer products | 2 launchs |
| 5 | BRIDGE Developer of affordable homes for senior living 62Funding top 16%Growth top 40%Tech top 41%Market top 42% All 6 signals ▾Fundingtop 16% Growthtop 40% Techtop 41% Markettop 42% Talentbottom 49% Globalbottom 32% Funding: Raised $250M across 4 rounds · 4 rounds over 4 yrs (1.0/yr) Growth: Headcount 359 → 417 (+16%) across vintages · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 62/100 | $250M | 7 mo ago | 417 417 → 316 (-24%) · sector median +10% | 1983 | — | 1 partnership |
| 6 | SPAN Smart energy management technology platform that modernizes residential electrical systems 82Funding top 13%Innovation top 18%Patents top 20%Growth top 28% All 11 signals ▾Fundingtop 13% Innovationtop 18% Patentstop 20% Growthtop 28% Moattop 28% Producttop 35% Talenttop 38% Techtop 42% Customerstop 42% Markettop 43% Globalbottom 42% Funding: Raised $231M across 10 rounds · 10 rounds over 8 yrs (1.2/yr) Innovation: 78 patents (top 21% of patent-holders) · 64 filings since 2022 vs 14 in 2017-21 rank vs industry peers · Fliar Intelligence Index 82/100 | $231M | 5 mo ago | 220 | 2014 | 78 patents Smart electrical panel and load management systems for residential/commercial energy control | 1 job opening |
| 7 | Aligos Therapeutics Developer of therapies to treat hepatologic diseases and viral infections 50Patents top 12%Innovation top 16%Funding top 26%Moat top 35% All 12 signals ▾Patentstop 12% Innovationtop 16% Fundingtop 26% Moattop 35% Partnerstop 40% Techtop 42% Talenttop 45% Globaltop 46% Newstop 47% Marketbottom 46% Growthbottom 32% Fin. healthbottom 25% Patents: 503 patents matched (strict assignee match) · 389 filings since 2022 vs 114 in 2017-21 Innovation: 503 patents (top 5% of patent-holders) · 389 filings since 2022 vs 114 in 2017-21 rank vs industry peers · Fliar Intelligence Index 50/100 | $225M | 16 mo ago | 70 70 → 99 (+41%) · sector median +10% | 2018 | 503 patents RNA interference therapeutics and PD‑L1 immuno‑oncology using heterocyclic siRNA delivery compounds | — |
| 8 | NovaBay Pharmaceuticals Developer of eye care and wound care products 32Funding top 21%Product top 35%News top 46%Talent bottom 49% All 10 signals ▾Fundingtop 21% Producttop 35% Newstop 46% Talentbottom 49% Moatbottom 44% Marketbottom 43% Techbottom 41% Growthbottom 40% Globalbottom 38% Fin. healthbottom 37% Funding: Raised $220M across 13 rounds · 13 rounds over 11 yrs (1.2/yr) Product: 0 product launch events in 12 mo · Company stage: Public rank vs industry peers · Fliar Intelligence Index 32/100 | $220M | 5 mo ago | 33 33 → 38 (+15%) · sector median +10% | 2000 | — | — |
| 9 | Smart Wires Provider of technology to enhance electric grid capacity and flexibility 72Funding top 19%Patents top 21%Innovation top 25%Moat top 26% All 9 signals ▾Fundingtop 19% Patentstop 21% Innovationtop 25% Moattop 26% Growthtop 35% Techtop 41% Marketbottom 49% Globalbottom 38% Newsbottom 19% Funding: Raised $215M across 12 rounds · 12 rounds over 14 yrs (0.9/yr) Patents: 232 patents matched (strict assignee match) · 104 filings since 2022 vs 123 in 2017-21 rank vs industry peers · Fliar Intelligence Index 72/100 | $215M | 16 mo ago | 155 | 2010 | 232 patents High‑voltage transmission line FACTS devices for dynamic impedance injection and power flow control | — |
| 10 | Frore Systems Developer of thermal management solutions for data centers and electronic devices 72Innovation top 16%Patents top 17%Funding top 18%Moat top 33% All 10 signals ▾Innovationtop 16% Patentstop 17% Fundingtop 18% Moattop 33% Newstop 34% Growthtop 35% Talenttop 38% Marketbottom 48% Techbottom 42% Globalbottom 40% Innovation: 194 patents (top 16% of patent-holders) · 163 filings since 2022 vs 31 in 2017-21 Patents: 194 patents matched (strict assignee match) · 163 filings since 2022 vs 31 in 2017-21 rank vs industry peers · Fliar Intelligence Index 72/100 | $190M | 3 mo ago | 75 | 2018 | 194 patents MEMS-enabled active cooling and fluidic actuation for LED and waterproof electronic systems | — |
| 11 | Saildrone Developer of autonomous unmanned surface vehicle 55Funding top 23%Moat top 31%Growth top 35%Tech top 42% All 10 signals ▾Fundingtop 23% Moattop 31% Growthtop 35% Techtop 42% Markettop 47% Talentbottom 49% Patentsbottom 45% Globalbottom 43% Innovationbottom 37% Newsbottom 22% Funding: Raised $190M across 4 rounds · 4 rounds over 10 yrs (0.4/yr) Moat: Editorial + unicorn rating 8/10 · IP moat: 18 patents rank vs industry peers · Fliar Intelligence Index 55/100 | $190M | 13 mo ago | 250 | 2012 | 18 patents Autonomous unmanned surface vehicles with flexible sensor mounts and square-wing sail propulsion. | 2 job openings · 1 launch |
| 12 | Caban Cloud based energy storage solutions 48Funding top 24%Moat top 36%Tech top 37%Talent bottom 49% All 7 signals ▾Fundingtop 24% Moattop 36% Techtop 37% Talentbottom 49% Growthbottom 48% Marketbottom 45% Globalbottom 32% Funding: Raised $176M across 4 rounds · 4 rounds over 7 yrs (0.6/yr) Moat: Editorial + unicorn rating 6/10 · Soonicorn rank vs industry peers · Fliar Intelligence Index 48/100 | $176M | 15 mo ago | 54 | 2016 | — | — |
| 13 | Watershed 🦄 Provider of platform for enterprise sustainability programs, measurement, reporting, and action 78Funding top 18%Growth top 24%Moat top 25%Product top 28% All 11 signals ▾Fundingtop 18% Growthtop 24% Moattop 25% Producttop 28% Talenttop 28% Techtop 34% Newstop 38% Markettop 39% Patentstop 46% Innovationtop 47% Globaltop 49% Funding: Raised $170M across 4 rounds · 4 rounds over 5 yrs (0.8/yr) Growth: Headcount 11 → 225 (+1945%) across vintages · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 78/100 | $170M | 5 mo ago | 225 | 2019 | 31 patents Shear‑resistant geomembranes and waterproof modular bags for containment and protective applications | — |
| 14 | Autogrid IoT enabled distributed energy resource management solutions provider 64Growth top 13%Product top 26%Funding top 31%Fin. health top 33% All 11 signals ▾Growthtop 13% Producttop 26% Fundingtop 31% Fin. healthtop 33% Moattop 37% Markettop 43% Innovationbottom 43% Globalbottom 39% Techbottom 38% Patentsbottom 38% Newsbottom 27% Growth: Revenue +122% YoY · Fresh capital in last 24 mo Product: 10 distinct product lines · Company stage: Acquired rank vs industry peers · Fliar Intelligence Index 64/100 | $160M | 14 mo ago | 134 | 2011 | 10 patents Demand response asset monitoring, control, and load forecasting for smart grid operations | — |
| 15 | Particle Developer of a prototype to production connectivity platform for IoT 55Tech top 23%Funding top 24%Customers top 24%News top 30% All 12 signals ▾Techtop 23% Fundingtop 24% Customerstop 24% Newstop 30% Moattop 35% Growthtop 40% Producttop 47% Talentbottom 49% Marketbottom 47% Patentsbottom 39% Globalbottom 39% Innovationbottom 35% Tech: 67 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 Funding: Raised $130M across 8 rounds · 8 rounds over 12 yrs (0.7/yr) rank vs industry peers · Fliar Intelligence Index 55/100 | $130M | 15 mo ago | 109 109 → 110 (+1%) · sector median +10% | 2011 | 5 patents Pharma skin‑inflammation formulations, audio speaker hardware, VR headset devices, graphic‑design software. | 1 launch |
| 16 | BEEWISE Saving bees with AI and robotics to protect the global food supply 48Funding top 20%Moat top 28%Growth top 35%AI top 35% All 10 signals ▾Fundingtop 20% Moattop 28% Growthtop 35% AItop 35% Producttop 36% Talentbottom 49% Techbottom 44% Globalbottom 39% Marketbottom 23% Newsbottom 17% Funding: Raised $120M across 8 rounds · 8 rounds over 7 yrs (1.1/yr) Moat: Editorial + unicorn rating 8/10 · Soonicorn rank vs industry peers · Fliar Intelligence Index 48/100 | $120M | 12 mo ago | 6 | 2018 | — | — |
| 17 | Osteal Therapeutics Developer of pharmaceuticals for musculoskeletal therapeutics to treat orthopedic infections 29Funding top 19%Moat top 38%Talent bottom 49%Global bottom 37% All 5 signals ▾Fundingtop 19% Moattop 38% Talentbottom 49% Globalbottom 37% Marketbottom 31% Funding: Raised $111M across 7 rounds · 7 rounds over 8 yrs (0.9/yr) Moat: Editorial + unicorn rating 5/10 · Soonicorn rank vs industry peers · Fliar Intelligence Index 29/100 | $111M | 8 mo ago | 13 | 2013 | — | 9 job openings |
| 18 | Evofem Developer of sexual and reproductive health therapeutics 50Funding top 24%Product top 30%Moat top 38%Patents top 43% All 12 signals ▾Fundingtop 24% Producttop 30% Moattop 38% Patentstop 43% Fin. healthtop 46% Innovationtop 48% Markettop 49% Growthbottom 49% Talentbottom 49% Techbottom 43% Newsbottom 41% Globalbottom 40% Funding: Raised $100M across 15 rounds · 15 rounds over 17 yrs (0.9/yr) Product: 1 distinct product line · Company stage: Public rank vs industry peers · Fliar Intelligence Index 50/100 | $100M | 11 mo ago | 126 | 2009 | 60 patents Vaginal film drug delivery systems for contraception, STI prevention, and antimicrobial microbicides | 1 partnership |
| 19 | Molekule Manufacturer of air purification and humidification devices with filtration technology 50Funding top 28%Innovation top 29%Patents top 29%Product top 34% All 13 signals ▾Fundingtop 28% Innovationtop 29% Patentstop 29% Producttop 34% Moattop 38% Techtop 41% Growthtop 45% Customerstop 50% Talentbottom 49% Marketbottom 44% Globalbottom 40% Newsbottom 36% Fin. healthbottom 29% Funding: Raised $97.9M across 6 rounds · 6 rounds over 10 yrs (0.6/yr) Innovation: 77 patents (top 23% of patent-holders) · 39 filings since 2022 vs 38 in 2017-21 rank vs industry peers · Fliar Intelligence Index 50/100 | $98M | 13 mo ago | 92 92 → 81 (-12%) · sector median +10% | 2014 | 77 patents Indoor air purification using photocatalytic and UV-based filtration technologies | — |
| 20 | AN2 Therapeutics Developer of drugs for treating infectious disease 45Funding top 19%Talent top 38%Moat top 48%Market bottom 42% All 6 signals ▾Fundingtop 19% Talenttop 38% Moattop 48% Marketbottom 42% Globalbottom 32% Newsbottom 24% Funding: Raised $92.0M across 3 rounds · 3 rounds over 7 yrs (0.4/yr) Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 45/100 | $92M | 3 mo ago | 35 35 → 37 (+6%) · sector median +10% | 2017 | — | — |
| 21 | Mirvie Provider of non-invasive diagnostic tests for pregnant women 69Growth top 20%Funding top 21%Patents top 24%Talent top 28% All 9 signals ▾Growthtop 20% Fundingtop 21% Patentstop 24% Talenttop 28% Innovationtop 32% Moattop 36% Techtop 46% Globalbottom 40% Marketbottom 35% Growth: Headcount 23 → 35 (+52%) across vintages · Fresh capital in last 24 mo Funding: Raised $90.0M across 4 rounds · 4 rounds over 5 yrs (0.8/yr) rank vs industry peers · Fliar Intelligence Index 69/100 | $90M | 11 mo ago | 35 35 → 41 (+17%) · sector median +10% | 2019 | 49 patents Non‑invasive prenatal diagnostics via methylation and RNA biomarkers for pregnancy monitoring | — |
| 22 | NanoH2O Developer of reverse osmosis membranes for water treatment 76Growth top 13%Funding top 24%Patents top 41%Market top 43% All 8 signals ▾Growthtop 13% Fundingtop 24% Patentstop 41% Markettop 43% Moattop 45% Innovationtop 46% Newsbottom 44% Globalbottom 42% Growth: Headcount 15 → 120 (+700%) across vintages · Fresh capital in last 24 mo Funding: Raised $89.9M across 8 rounds · 8 rounds over 19 yrs (0.4/yr) rank vs industry peers · Fliar Intelligence Index 76/100 | $90M | 6 mo ago | 120 | 2005 | 95 patents Enhanced thin‑film composite membrane technology for high‑flux water desalination | — |
| 23 | GridCARE Provider of AI data center power solutions leveraging existing grid infrastructure 50Funding top 22%Talent top 38%AI top 45%Global bottom 48% All 6 signals ▾Fundingtop 22% Talenttop 38% AItop 45% Globalbottom 48% Techbottom 44% Marketbottom 35% Funding: Raised $77.5M across 2 rounds · 2 rounds over 1 yrs (2.0/yr) Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 50/100 | $78M | 1 mo ago | — | 2024 | — | 1 partnership |
| 24 | Noveon Provider of magnet recycling solutions 60Funding top 21%Patents top 22%Moat top 23%Partners top 31% All 11 signals ▾Fundingtop 21% Patentstop 22% Moattop 23% Partnerstop 31% Innovationtop 32% Growthtop 36% Newstop 36% Techtop 41% Talentbottom 49% Globalbottom 42% Marketbottom 37% Funding: Raised $75.0M across 4 rounds · 4 rounds over 4 yrs (1.0/yr) Patents: 220 patents matched (strict assignee match) · Latest publication 2021 rank vs industry peers · Fliar Intelligence Index 60/100 | $75M | 4 mo ago | 12 | 2021 | 220 patents Waterborne polymer dispersions and coated polymer composites for textiles, cosmetics, and construction | — |
| 25 | Mill Provider of the smart bin 53Tech top 25%Funding top 29%Moat top 31%Growth top 35% All 12 signals ▾Techtop 25% Fundingtop 29% Moattop 31% Growthtop 35% Talenttop 38% Producttop 46% Innovationtop 48% Marketbottom 42% Fin. healthbottom 40% Globalbottom 37% Partnersbottom 35% Customersbottom 15% Tech: 39 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 Funding: Raised $70.0M across 1 rounds · 1 rounds over 3 yrs (0.3/yr) rank vs industry peers · Fliar Intelligence Index 53/100 | $70M | 6 mo ago | 150 | 2020 | — | 2 partnerships |
| 26 | Radiant Nuclear 🦄 Developer of portable nuclear microreactors designed to replace diesel generators 55Funding top 26%Growth top 28%Moat top 37%Market bottom 49% All 8 signals ▾Fundingtop 26% Growthtop 28% Moattop 37% Marketbottom 49% Talentbottom 49% Techbottom 41% Globalbottom 32% Partnersbottom 32% Funding: Raised $55.0M across 7 rounds · 7 rounds over 6 yrs (1.2/yr) Growth: Web rank 10,000,000 → 5,000,000 YoY · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 55/100 | $55M | 6 mo ago | 34 | 2019 | — | — |
| 27 | Arbor Provider of solutions to convert organic waste into clean energy 21Funding top 32%News top 38%Moat top 42%Talent bottom 49% All 9 signals ▾Fundingtop 32% Newstop 38% Moattop 42% Talentbottom 49% Globalbottom 36% Techbottom 35% Innovationbottom 34% Patentsbottom 33% Marketbottom 32% Funding: Raised $55.0M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) News: 3 BI events in 12 mo (of 4 tracked, 2 types) · Top themes: Funding rank vs industry peers · Fliar Intelligence Index 21/100 | $55M | 7 mo ago | — | 2021 | 12 patents 3D stacked reconfigurable processor modules and hybrid die integration for configurable computing | — |
| 28 | Heirloom Provider of direct air capture technology for permanent carbon dioxide removal 40Funding top 26%Talent top 28%Moat top 39%Market bottom 45% All 8 signals ▾Fundingtop 26% Talenttop 28% Moattop 39% Marketbottom 45% Growthbottom 40% Globalbottom 39% Techbottom 37% Newsbottom 19% Funding: Raised $53.0M across 4 rounds · 4 rounds over 5 yrs (0.8/yr) Talent: 3 named leaders on record · 3 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 40/100 | $53M | 6 mo ago | 54 | 2020 | — | — |
| 29 | Aether Fuels Developer of technology converting waste carbon into sustainable liquid fuels 40Funding top 23%Growth top 35%News top 46%Moat top 48% All 9 signals ▾Fundingtop 23% Growthtop 35% Newstop 46% Moattop 48% Talentbottom 49% Globalbottom 39% Marketbottom 35% Partnersbottom 35% Techbottom 32% Funding: Raised $45.4M across 3 rounds · 3 rounds over 3 yrs (1.0/yr) Growth: Web rank 50,000,000 → 10,000,000 YoY · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 40/100 | $45M | 5 mo ago | — | 2022 | — | 1 launch · 1 award |
| 30 | Quilt AI-based heat control systems for homes 55Funding top 24%Talent top 28%Growth top 35%Moat top 39% All 10 signals ▾Fundingtop 24% Talenttop 28% Growthtop 35% Moattop 39% Techtop 45% AItop 45% Producttop 46% Globalbottom 39% Marketbottom 33% Customersbottom 2% Funding: Raised $42.0M across 3 rounds · 3 rounds over 3 yrs (1.0/yr) Talent: 3 named leaders on record · 3 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 55/100 | $42M | 6 mo ago | 30 | 2022 | — | 2 launchs · 1 expansion · 1 award |
| 31 | Verdigris AI and SaaS-driven energy analytics platform for the management of facilities and commercial buildings 48Funding top 23%Growth top 28%Talent top 28%Moat top 41% All 11 signals ▾Fundingtop 23% Growthtop 28% Talenttop 28% Moattop 41% Techtop 42% Producttop 46% Newsbottom 41% Globalbottom 39% Marketbottom 32% Innovationbottom 31% Patentsbottom 24% Funding: Raised $41.7M across 13 rounds · 13 rounds over 15 yrs (0.9/yr) Growth: Headcount 20 → 27 (+35%) across vintages · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 48/100 | $42M | 3 mo ago | 27 | 2011 | 2 patents Electrical load identification and disaggregation via waveform analysis for power monitoring | — |
| 32 | Lumos Diagnostics Provider of rapid point-of-care diagnostic test solutions 57Funding top 25%Partners top 31%News top 34%Growth top 38% All 8 signals ▾Fundingtop 25% Partnerstop 31% Newstop 34% Growthtop 38% Markettop 48% Moattop 48% Techbottom 46% Globalbottom 44% Funding: Raised $40.0M across 3 rounds · 3 rounds over 6 yrs (0.5/yr) Partners: 3 contract events in 12 mo · Named contractor/client in 3 deals rank vs industry peers · Fliar Intelligence Index 57/100 | $40M | 2 mo ago | 55 | 2017 | — | 1 partnership |
| 33 | Daré Bioscience Developer of non-hormonal pharmaceutical products for female contraceptives 50Funding top 27%Product top 28%Growth top 37%Innovation top 38% All 11 signals ▾Fundingtop 27% Producttop 28% Growthtop 37% Innovationtop 38% Techtop 40% Moattop 48% Talentbottom 49% Newsbottom 45% Fin. healthbottom 43% Marketbottom 33% Globalbottom 32% Funding: Raised $39.7M across 17 rounds · 17 rounds over 9 yrs (1.9/yr) Product: 3 distinct product lines · 1 published app (300 installs) rank vs industry peers · Fliar Intelligence Index 50/100 | $40M | 6 mo ago | 30 30 → 27 (-10%) · sector median +10% | 2005 | — | 4 launchs |
| 34 | Terraform Industries Developer of natural gas from carbon capture technology 19Talent top 38%Growth top 45%Funding top 48%Global bottom 37% All 6 signals ▾Talenttop 38% Growthtop 45% Fundingtop 48% Globalbottom 37% Marketbottom 25% Techbottom 15% Talent: 2 named leaders on record · 2 C-suite/founder profiles curated Growth: Web rank 10,000,000 → 50,000,000 YoY · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 19/100 | $38M | 2 mo ago | 9 | 2021 | — | — |
| 35 | Overture Life Developer of embryology diagnosis device for professionals 67Patents top 26%AI top 28%Talent top 28%Funding top 29% All 11 signals ▾Patentstop 26% AItop 28% Talenttop 28% Fundingtop 29% Moattop 31% Innovationtop 32% Growthtop 35% Techbottom 44% Globalbottom 43% Marketbottom 37% Newsbottom 18% Patents: 44 patents matched (strict assignee match) · 34 filings since 2022 vs 10 in 2017-21 AI: Holds AI/ML patents (G06N-family CPC) · Product described with: ai powered rank vs industry peers · Fliar Intelligence Index 67/100 | $37M | 7 mo ago | 41 | 2017 | 44 patents Automated microinjection and microfluidic handling for IVF and embryo selection | 1 launch · 1 partnership |
| 36 | AusperBio Developer of therapies for the treatment of chronic hepatitis B and other major infectious diseases 40Funding top 26%Talent top 38%Moat top 39%Growth bottom 42% All 7 signals ▾Fundingtop 26% Talenttop 38% Moattop 39% Growthbottom 42% Marketbottom 40% Globalbottom 38% Newsbottom 24% Funding: Raised $37.0M across 4 rounds · 4 rounds over 2 yrs (2.0/yr) Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 40/100 | $37M | 8 mo ago | — | 2019 | — | — |
| 37 | Living Carbon Provider of biotechnology based carbon storage solutions 53Partners top 18%Funding top 23%Growth top 25%News top 28% All 9 signals ▾Partnerstop 18% Fundingtop 23% Growthtop 25% Newstop 28% Moattop 39% Talentbottom 49% Techbottom 42% Marketbottom 40% Globalbottom 39% Partners: 5 contract events in 12 mo · Named contractor/client in 5 deals Funding: Raised $36.0M across 5 rounds · 5 rounds over 4 yrs (1.2/yr) rank vs industry peers · Fliar Intelligence Index 53/100 | $36M | 1 mo ago | 25 25 → 38 (+52%) · sector median +10% | 2019 | — | — |
| 38 | Halcyon Provider of AI-assisted search and information platform for energy professionals 45Funding top 25%Talent top 38%Patents top 39%Innovation top 42% All 7 signals ▾Fundingtop 25% Talenttop 38% Patentstop 39% Innovationtop 42% Techbottom 46% Marketbottom 37% Globalbottom 35% Funding: Raised $31.8M across 2 rounds · 2 rounds over 2 yrs (1.0/yr) Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 45/100 | $32M | 3 mo ago | — | 2021 | 13 patents High‑pressure lipid extraction, infusion and bonding equipment for oil processing | — |
| 39 | Affinity Biosensors Developer of rapid antimicrobial susceptibility testing devices for life sciences 27Funding top 27%Moat top 31%Talent bottom 49%Patents bottom 46% All 7 signals ▾Fundingtop 27% Moattop 31% Talentbottom 49% Patentsbottom 46% Innovationbottom 39% Globalbottom 36% Marketbottom 34% Funding: Raised $31.3M across 17 rounds · 17 rounds over 13 yrs (1.3/yr) Moat: Editorial + unicorn rating 7/10 · IP moat: 12 patents rank vs industry peers · Fliar Intelligence Index 27/100 | $31M | 2 mo ago | 21 | 2006 | 12 patents Rapid antimicrobial susceptibility testing via resonant mass and microchannel sensor technologies | — |
| 40 | Merlin Solar Manufacturers of solar modules 55Product top 26%Funding top 27%Tech top 27%Growth top 35% All 10 signals ▾Producttop 26% Fundingtop 27% Techtop 27% Growthtop 35% Patentstop 43% Moattop 43% Innovationtop 50% Talentbottom 49% Globalbottom 40% Marketbottom 38% Product: 11 distinct product lines · Company stage: Acquired Funding: Raised $31.0M across 2 rounds · 2 rounds over 2 yrs (1.0/yr) rank vs industry peers · Fliar Intelligence Index 55/100 | $31M | 5 mo ago | 62 | 2016 | 79 patents Metallic interconnects and surface treatments for photovoltaic module manufacturing | — |
| 41 | Sunflower Labs Provider of AI-driven home security solutions using smart lighting and drones 62Funding top 31%Innovation top 35%Growth top 35%Patents top 36% All 11 signals ▾Fundingtop 31% Innovationtop 35% Growthtop 35% Patentstop 36% Moattop 37% Talenttop 38% Techtop 43% Newstop 44% AItop 45% Globalbottom 39% Marketbottom 34% Funding: Raised $22.1M across 5 rounds · 5 rounds over 10 yrs (0.5/yr) Innovation: 18 patents (top 54% of patent-holders) · 5 filings since 2022 vs 3 in 2017-21 rank vs industry peers · Fliar Intelligence Index 62/100 | $22M | 7 mo ago | 30 | 2016 | 18 patents Autonomous multicopter drones for security surveillance, auto‑landing, and sensor‑network integration | — |
| 42 | Rubi Manufacturer of biobased textiles made from captured carbon emissions 32Funding top 28%Partners top 32%Moat top 35%Talent top 38% All 7 signals ▾Fundingtop 28% Partnerstop 32% Moattop 35% Talenttop 38% Newsbottom 48% Globalbottom 39% Marketbottom 31% Funding: Raised $18.6M across 6 rounds · 6 rounds over 4 yrs (1.5/yr) Partners: 2 partnership announcements in 12 mo (2 in 24 mo) rank vs industry peers · Fliar Intelligence Index 32/100 | $19M | 6 mo ago | 12 12 → 28 (+133%) · sector median +10% | 2020 | — | — |
| 43 | Lumen Energy Provider of solutions to manage PPA 40Funding top 36%Talent top 38%Market bottom 43%Global bottom 36% All 4 signals ▾Fundingtop 36% Talenttop 38% Marketbottom 43% Globalbottom 36% Funding: Raised $16.5M · 3 rounds over 5 yrs (0.6/yr) Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 40/100 | $17M | 3 mo ago | 38 | 2019 | — | — |
| 44 | NovaSolix Developer of rectenna-based solar technology for various applications and sectors 32Moat top 25%Funding top 33%Talent top 34%Patents top 41% All 7 signals ▾Moattop 25% Fundingtop 33% Talenttop 34% Patentstop 41% Innovationtop 47% Globalbottom 33% Marketbottom 25% Moat: Editorial + unicorn rating 6/10 · IP moat: 42 patents Funding: Raised $16.1M across 3 rounds · 3 rounds over 6 yrs (0.5/yr) rank vs industry peers · Fliar Intelligence Index 32/100 | $16M | 2 mo ago | 12 | 2015 | 42 patents Solar-powered antenna arrays and low‑power semi‑reflective display technologies | 3 launchs · 2 partnerships |
| 45 | Gridware Real-time grid intelligence platform for safer, more resilient power grids 50Funding top 28%Growth top 28%Talent top 28%Moat top 39% All 8 signals ▾Fundingtop 28% Growthtop 28% Talenttop 28% Moattop 39% Newstop 43% Techbottom 43% Globalbottom 37% Marketbottom 32% Funding: Raised $15.9M across 6 rounds · 6 rounds over 6 yrs (1.0/yr) Growth: Web rank 50,000,000 → 10,000,000 YoY · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 50/100 | $16M | 7 mo ago | 18 | 2020 | — | — |
| 46 | Lighthouse Pharma Developer of therapeutics for neurology and infectious diseases 11Funding top 46%Talent bottom 49%Tech bottom 45%Global bottom 25% All 5 signals ▾Fundingtop 46% Talentbottom 49% Techbottom 45% Globalbottom 25% Marketbottom 18% Funding: Raised $15.2M 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 11/100 | $15M | 1 mo ago | 4 | 2019 | — | 1 job opening |
| 47 | Jaguar Health Developing gastrointestinal products for human prescription use and animals 50Product top 14%Funding top 24%Innovation top 34%Growth top 43% All 11 signals ▾Producttop 14% Fundingtop 24% Innovationtop 34% Growthtop 43% Talentbottom 49% Marketbottom 48% Fin. healthbottom 48% Moatbottom 45% Newsbottom 41% Techbottom 33% Globalbottom 32% Product: 4 distinct product lines · Company stage: Public Funding: Raised $11.6M across 28 rounds · 28 rounds over 12 yrs (2.3/yr) rank vs industry peers · Fliar Intelligence Index 50/100 | $12M | 5 mo ago | 46 46 → 35 (-24%) · sector median +10% | 2013 | — | 1 launch · 1 partnership |
| 48 | Centivax Provider of drug discovery services 55Growth top 25%News top 28%Funding top 32%Patents top 32% All 9 signals ▾Growthtop 25% Newstop 28% Fundingtop 32% Patentstop 32% Innovationtop 40% Moattop 47% Globalbottom 40% Techbottom 39% Marketbottom 29% Growth: Fresh capital in last 24 mo News: 5 BI events in 12 mo (of 5 tracked, 2 types) · 4 high-value events (IPO/M&A/funding/contracts) in 12 mo rank vs industry peers · Fliar Intelligence Index 55/100 | $10M | 2 mo ago | 19 | 2019 | 39 patents Peptide-derived therapeutic antibodies and low-dose vaccine formulations targeting viral antigens | — |
| 49 | MicroBio Engineering Developer of microalgae technology and wastewater treatment plants 32Innovation top 20%Funding top 44%Product top 46%Talent bottom 45% All 7 signals ▾Innovationtop 20% Fundingtop 44% Producttop 46% Talentbottom 45% Techbottom 31% Globalbottom 29% Marketbottom 15% Innovation: 6 product lines Funding: Raised $8.7M across 9 rounds · 9 rounds over 10 yrs (0.9/yr) rank vs industry peers · Fliar Intelligence Index 32/100 | $9M | 5 mo ago | 8 | 2005 | — | — |
| 50 | Flair Systems Manufacturer of smart vents for home temperature control 50Tech top 26%Growth top 35%Funding top 37%Talent top 38% All 9 signals ▾Techtop 26% Growthtop 35% Fundingtop 37% Talenttop 38% Customerstop 39% Moattop 39% Producttop 46% Globalbottom 38% Marketbottom 25% Tech: 60 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 Growth: Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 50/100 | $8M | 2 mo ago | 13 | 2014 | — | — |
Top 12 Sustainability Tech companies in California
#1
Public · San Francisco, California · founded 2017 · 49 employees$420.2Mraised▾
Developer of next-generation geothermal projects delivering carbon-free energy. It pioneers a new approach to geothermal energy using technologies like horizontal drilling and distributed fiber optic sensing to unlock geothermal resources. It focuses on making geothermal energy a scalable resource and ensures environmental health and safety in its operations. The company aims to decarbonize challenging parts of the electricity sector through geothermal energy.
- Mar 2026Conventional Debt$421M
- Dec 2025Series E$462M
- Jun 2025Conventional Debt$105.5M
- Jun 2025Series D$100M
#2
Series D · San Jose, California · founded 2018 · 75 employees$190Mraised▾
Developer of thermal management solutions for data centers and electronic devices. The company offers direct-to-chip liquid cooling and solid-state active air cooling products. These cooling solutions are applicable to consumer devices, industrial embedded systems, and data centers. The company's products aim to improve performance and enable compact designs.
- Mar 2026Series D$143M
- May 2024Series C$90M
- Dec 2022Series B$100M
- 2018Series A—
#3
Series C · San Francisco, California · founded 2014 · 220 employees$231Mraised▾
Smart energy management technology platform that modernizes residential electrical systems. Its solutions replace traditional electrical panels with smart systems that provide homeowners with real-time visibility into household energy usage, circuit-level monitoring, and remote control of appliances and connected devices. It is designed to support modern electrified homes by integrating technologies such as home batteries, electric vehicle chargers, solar systems, HVAC systems, and heat pumps into a centralized energy management ecosystem.
- Jan 2026Series C$163.3M
- Sep 2025Series B$25M
- Jun 2025Grant (prize money)$999.8K
- Apr 2025Grant (prize money)$999.8K
#4
Public · Emeryville, California · founded 2000 · 33 employees$219.5Mraised▾
Developer of eye care and wound care products. The company's products include Avenova An antimicrobial lid and lash solution for eye care, PhaseOne and NeutroPhase a wound care products using hypochlorous acid for cleansing, irrigation, and treating injuries.
- Jan 2026Post IPO$134M
- Aug 2025Post IPO$6M
- Mar 2024Post IPO$665K
- Sep 2022Post IPO—
#5
Series A · Redwood City, California · founded 2024$77.5Mraised▾
Provider of AI data center power solutions leveraging existing grid infrastructure. It partners with AI infrastructure developers and electric utilities to identify and utilize existing grid capacity for powering AI data centers. This approach reduces time-to-power significantly, eliminating the need for costly grid upgrades. The company employs generative AI to pinpoint optimal sites and optimize grid capacity utilization across all locations and hours. This solution benefits both data center developers, by providing faster access to power, and utilities, by driving beneficial load growth and maximizing asset utilization.
- May 2026Series A$64M
- May 2025Seed$13.5M
#6
Public · Menlo Park, California · founded 2017 · 35 employees$92Mraised▾
Developer of drugs for treating infectious disease. The company is developing novel small molecule therapeutics, designing and executing clinical trials on experimental treatments, and navigating the regulatory approval process for new medicines.
- Mar 2026Post IPO$40M
- Jan 2022Series B$80M
- Nov 2019Series A$12M
#7
Series A · San Francisco, California · founded 2019 · 25 employees$36Mraised▾
Provider of biotechnology based carbon storage solutions. It uses biochemistry to enhance a tree natural ability to draw down atmospheric carbon.
- Apr 2026Series A$13M
- Jan 2023Series A$21M
- Feb 2022Grant (prize money)$500K
- Feb 2022Series A$15M
#8
Series C · San Francisco, California · founded 2019 · 225 employees$170.5Mraised▾
Provider of platform for enterprise sustainability programs, measurement, reporting, and action. The platform offers tools for carbon accounting, emissions reduction, and sustainability disclosure preparation. It facilitates target setting and progress tracking toward decarbonization. The platform supports audit-grade data and methodologies vetted by third-party auditors.
- Dec 2025Series C$14.5M
- Jun 2025Grant (prize money)$55K
- Feb 2024Series C$100.5M
- Feb 2022Series B$70M
#9
Series D · San Francisco, California · founded 1983 · 417 employees$250Mraised▾
Developer of affordable homes for senior living
- Oct 2025Conventional Debt$175M
- Dec 2024Conventional Debt$71.5M
- Jul 2022Series D$250M
- 2020Conventional Debt$100M
#10
Series B · Mountain View, California · founded 2011 · 27 employees$41.7Mraised▾
AI and SaaS-driven energy analytics platform for the management of facilities and commercial buildings. The cloud-based solution allows users to optimize operations, facility uptime, and manage energy costs. Its wireless sensors enable real-time identification, disaggregation, and analysis of the loads in buildings, providing insights into behavior and usage. It also provides an IoT Energy Meter that helps to track energy consumption with its smart sensors.
- Mar 2026Series B—
- Aug 2023Series B$10M
- Dec 2021Series B$1.1M
- Jan 2021Series B$7.1M
#11
Series B · Santa Barbara, California · founded 2006 · 21 employees$31.3Mraised▾
Developer of rapid antimicrobial susceptibility testing devices for life sciences. The company provides LifeScale, a rapid antimicrobial susceptibility testing technology that offers population-profiling for Gram-negative bacteria in positive blood culture. It also offers primary and secondary antibodies, peptides, reagent kits, inhibitors, and other related products.
- Mar 2026Post IPO$2.3M
- Nov 2024Series B$14.4M
- Jun 2024Series A$3.7M
- Nov 2023Series A$2.4M
#12
Public · Carlsbad, California · founded 2017 · 55 employees$40Mraised▾
Provider of rapid point-of-care diagnostic test solutions. It offers FebriDx a rapid, fingerstick blood test intended to help differentiate between bacterial vs non-bacterial acute respiratory infections and ViraDx a rapid POC test that can simultaneously test for respiratory viruses like COVID-19 and Influenza A/B.
- Mar 2026Post IPO$20M
- Oct 2020Series B$25M
- Feb 2020Series A$15M
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 California is moving
A read on the academic research around Climate Adaptation in California — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 134 papers.
UC Berkeley, Davis, and Irvine lead California's climate-adaptation research, focusing predominantly on flood risk and agricultural resilience, with a contested tone reflecting overwhelming concern over breakthrough.
- University of California, Berkeley23
- University of California, Davis21
- University of California, Irvine14
- University of California, Los Angeles8
- University of California, Santa Cruz8
- Climate change1→6
- Climate change3→13
- Resilience (materials science)2→7
- Flood myth3→5
- Climate resilience1→3
- Climate change7→33
- Resilience (materials science)4→16
- Flood myth1→9
- Climate resilience3→8
- Environmental resource management1→5