Radar · Energy Storage Tech in Massachusetts
Best Energy Storage Tech Companies in Massachusetts, United States
The 88 best Energy Storage Tech companies in Massachusetts, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Form Energy.
By Riya SenguptaFinancials
88companies tracked
$5.4Bdisclosed funding
2unicorns
58have raised
FLIAR INTELLIGENCE · ENERGY STORAGE TECH × MASSACHUSETTS
Our analysis of 50 Energy Storage Tech companies
$13.7b in tracked funding; 88% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
50companies analysed
88%cloud-native stacks
2025funding peak (by rounds)
4unicorns
2015median founding year
381kcombined LinkedIn audience
37%of audience held by top 3
6companies hiring publicly (12 mo)
Ranked: Best Energy Storage Tech companies in Massachusetts
| # | Company | Disclosed funding | Last round | Employees | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | Form Energy Clean energy technology platform developing long-duration iron-air battery systems 83Patents top 11%Funding top 15%Innovation top 16%Moat top 26% All 12 signals ▾Patentstop 11% Fundingtop 15% Innovationtop 16% Moattop 26% Producttop 28% Growthtop 31% Partnerstop 31% Talenttop 34% Newstop 36% Markettop 37% Techtop 44% Globalbottom 44% Patents: 358 patents matched (strict assignee match) · 302 filings since 2022 vs 54 in 2017-21 Funding: Raised $1.1B across 9 rounds · 9 rounds over 8 yrs (1.1/yr) rank vs industry peers · Fliar Intelligence Index 83/100 | $1.1B | 17 mo ago | 372 372 → 850 (+128%) · sector median -8% | 2009 | WordPressApple iCloud MailGoogle Workspace+28 | 358 patents Low-cost metal‑air batteries and iron‑based electrochemical production systems | 1 job opening |
| 2 | Ascend Elements 🦄 Manufacturer of engineered materials from recycled lithium-ion batteries and battery scrap 80Funding top 13%Innovation top 21%Patents top 22%News top 24% All 11 signals ▾Fundingtop 13% Innovationtop 21% Patentstop 22% Newstop 24% Moattop 25% Growthtop 27% Talenttop 38% Markettop 42% Techbottom 48% Partnersbottom 43% Globalbottom 42% Funding: Raised $1.0B across 10 rounds · 10 rounds over 4 yrs (2.5/yr) Innovation: 98 patents (top 28% of patent-holders) · 98 filings since 2022 vs 0 in 2017-21 rank vs industry peers · Fliar Intelligence Index 80/100 | $1.0B | 15 mo ago | 87 87 → 148 (+70%) · sector median -8% | 2015 | WordPressProton MailMicrosoft 365+22 | 98 patents Recycling and purification of battery metals and graphite for Li‑ion and NiMH batteries | — |
| 3 | Boston Power Provider of lithium-ion battery | $627M | 136 mo ago | 10 | 2005 | — | 193 patents Advanced lithium‑ion battery modules, safety controls, and cell‑balancing systems | — |
| 4 | 24m Technologies 🦄 Developer of battery technology for electric vehicles and energy storage 69Funding top 18%Moat top 22%Growth top 26%Patents top 32% All 10 signals ▾Fundingtop 18% Moattop 22% Growthtop 26% Patentstop 32% Talenttop 38% Innovationtop 39% Techtop 49% Markettop 50% Globalbottom 44% Newsbottom 21% Funding: Raised $500M across 13 rounds · 13 rounds over 16 yrs (0.8/yr) Moat: Editorial + unicorn rating 9/10 · IP moat: 288 patents rank vs industry peers · Fliar Intelligence Index 69/100 | $500M | 12 mo ago | 147 147 → 89 (-39%) · sector median -8% | 2010 | HubSpot CMS HubHubSpotcore-js+11 | 288 patents Patents concentrated in electrical & electronics | — |
| 5 | SES Technologies Developer of Li-Metal batteries and AI-powered battery management solutions | $324M | 40 mo ago | 300 300 → 171 (-43%) · sector median -8% | 2012 | Webflow EcommerceWebflowSentry+19 | — | 1 launch · 1 award |
| 6 | Factorial Energy Developer of sustainable solid-state batteries 60Funding top 24%Talent top 28%Moat top 31%Growth top 35% All 8 signals ▾Fundingtop 24% Talenttop 28% Moattop 31% Growthtop 35% Techbottom 48% Newsbottom 47% Marketbottom 45% Globalbottom 39% Funding: Raised $244M across 7 rounds · 7 rounds over 12 yrs (0.6/yr) Talent: 3 named leaders on record · 3 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 60/100 | $244M | 5 mo ago | 175 | 2013 | WordPressApple iCloud MailMicrosoft 365+24 | — | 1 launch · 1 partnership |
| 7 | Ambri Manufacturer of liquid metal battery systems for grid energy storage | $219M | 22 mo ago | 141 | 2010 | WordPressMySQLPHP+28 | 114 patents Liquid metal battery technology for grid-scale high-temperature energy storage | — |
| 8 | VionX Energy Developer of vanadium flow battery | $152M | 78 mo ago | 24 | 2002 | — | — | — |
| 9 | WiTricity Magnetic resonance-based wireless charging solutions for electric vehicles | $146M | 48 mo ago | 48 48 → 42 (-12%) · sector median -8% | 2007 | HubSpot CMS HubApple iCloud MailTailwind CSS+17 | 952 patents Wireless resonant power transfer systems and positioning for bidirectional EV charging | 1 launch |
| 10 | Alsym Energy Provider of non-flammable battery solutions | $104M | 28 mo ago | 39 | 2015 | WordPressMySQLMariaDB+28 | — | 1 launch · 2 partnerships |
| 11 | Malta Developer of long-duration energy storage systems using steam-based heat pump 64Innovation top 16%Patents top 17%Moat top 19%Funding top 28% All 10 signals ▾Innovationtop 16% Patentstop 17% Moattop 19% Fundingtop 28% Growthtop 45% Techtop 46% Talentbottom 49% Marketbottom 46% Globalbottom 45% Newsbottom 22% Innovation: 272 patents (top 18% of patent-holders) · 184 filings since 2022 vs 88 in 2017-21 Patents: 272 patents matched (strict assignee match) · 184 filings since 2022 vs 88 in 2017-21 rank vs industry peers · Fliar Intelligence Index 64/100 | $98M | 5 mo ago | 266 | 2018 | WordPressMySQLPHP+20 | 272 patents Thermal energy storage systems integrating pumped heat with power plants and district heating | — |
| 12 | SparkCharge Provider of charging solutions for electric vehicles 64Funding top 19%Innovation top 25%Moat top 28%Patents top 30% All 11 signals ▾Fundingtop 19% Innovationtop 25% Moattop 28% Patentstop 30% Growthtop 38% Techtop 47% Talentbottom 49% Productbottom 47% Marketbottom 45% Globalbottom 37% Newsbottom 18% Funding: Raised $91.5M across 13 rounds · 13 rounds over 9 yrs (1.4/yr) Innovation: 36 patents (top 38% of patent-holders) · 26 filings since 2022 vs 10 in 2017-21 rank vs industry peers · Fliar Intelligence Index 64/100 | $92M | 13 mo ago | 50 50 → 40 (-20%) · sector median -8% | 2014 | Webflow EcommerceWebflowAmazon Web Services+15 | 36 patents Modular fast-charging and battery-swap infrastructure for electric vehicles | — |
| 13 | Infinite Power Solutions Manufactures solid state-thin film storage devices | $88M | 157 mo ago | 41 | 2001 | WordPressMySQLPHP+10 | 143 patents Integrated thin‑film energy storage, solid‑state power sources, and harvesting for electronics | — |
| 14 | General Compression Premier online platform for sports betting, live casino, and slots | $84M | 163 mo ago | 17 | 2006 | — | 11 patents Advanced hydraulic‑actuated gas compressors/expanders with enhanced heat‑transfer and energy‑storage efficiency. | — |
| 15 | Ionic Materials Solid state polymer electrolyte material | $65M | 95 mo ago | 40 | 2012 | — | — | — |
| 16 | Upstart Power Offering solutions for solid oxide fuel generators 50Funding top 20%Product top 21%Moat top 21%Patents top 34% All 10 signals ▾Fundingtop 20% Producttop 21% Moattop 21% Patentstop 34% Innovationtop 35% Talenttop 38% Techtop 50% Globalbottom 43% Marketbottom 31% Newsbottom 27% Funding: Raised $56.6M across 8 rounds · 8 rounds over 9 yrs (0.9/yr) Product: 12 distinct product lines · Company stage: Series D rank vs industry peers · Fliar Intelligence Index 50/100 | $57M | 8 mo ago | 35 | 2017 | Framer SitesReactPriority Hints+4 | 46 patents Patents concentrated in electrical & electronics | — |
| 17 | Nanoramic Provider of nanotech based electrode materials for supercapacitors 72Growth top 17%Funding top 19%Patents top 26%Moat top 28% All 10 signals ▾Growthtop 17% Fundingtop 19% Patentstop 26% Moattop 28% Talenttop 28% Innovationtop 31% Newstop 34% Marketbottom 47% Globalbottom 40% Techbottom 33% Growth: Headcount 39 → 66 (+69%) across vintages · Fresh capital in last 24 mo Funding: Raised $49.6M across 24 rounds · 24 rounds over 16 yrs (1.5/yr) rank vs industry peers · Fliar Intelligence Index 72/100 | $50M | 7 mo ago | 66 66 → 50 (-24%) · sector median -8% | 2009 | — | 36 patents Advanced electrode materials and hydrophilic binders for high-performance rechargeable batteries | — |
| 18 | Titan Advanced Energy Solutions Acoustic battery management system provider for lithium batteries | $43M | 55 mo ago | 35 35 → 43 (+23%) · sector median -8% | 2016 | WixSentryBootstrap+14 | — | 3 job openings |
| 19 | GSP Developer of battery energy storage and renewable energy projects | $40M | 36 mo ago | 66 | 2022 | — | — | — |
| 20 | Beacon Power Developer of flywheel energy storage systems | $38M | 162 mo ago | 6 | 1997 | WordPressMySQLAdobe Flash+13 | 55 patents Grid frequency regulation via flywheel energy storage and magnetic bearing technologies | — |
| 21 | Nuvera Developer of hydrogen fuel cell engines and power generation systems | $38M | 13 mo ago | 102 102 → 94 (-8%) · sector median -8% | 2000 | WordPress Block EditorWordPressMySQL+17 | — | 1 launch · 2 partnerships |
| 22 | Pure Lithium Developer of lithium metal battery technology using a vanadium cathode | $29M | 15 mo ago | 39 | 2021 | — | 77 patents Lithium metal anodes and advanced rechargeable battery technologies | 1 award |
| 23 | Nanoscale Comp Manufacturer of nanotech-based ultracapacitors | $29M | 55 mo ago | 9 | 2007 | — | — | — |
| 24 | XL Batteries Organic flow energy storage solution | $28M | 10 mo ago | — | 2019 | WordPress Block EditorElementorWordPress+27 | 58 patents Dry electrode manufacturing, powder coating, and crossover reduction for redox flow batteries | — |
| 25 | Protonex Developer of integrated tactical systems for military and first responders | $26M | 151 mo ago | 43 | 2000 | — | 140 patents Solid oxide fuel cell power systems and DC power management electronics | — |
| 26 | Electra Vehicles Battery management system for electric vehicles | $25M | 40 mo ago | 28 28 → 38 (+36%) · sector median -8% | 2015 | WordPressMySQLPHP+23 | 35 patents Patents concentrated in transport & manufacturing processes | 3 launchs |
| 27 | Adden Energy Provider of solutions for solid state batteries | $20M | 21 mo ago | 6 | 2021 | WordPressMySQLPHP+16 | — | — |
| 28 | Fourth Power Energy storage solutions for grid | $19M | 9 mo ago | — | 2021 | WordPressMySQLPHP+27 | — | 1 internship |
| 29 | Addisenergy Developer of a subsurface process for producing ammonia from iron resources 27Talent top 23%Funding top 30%Global bottom 33%Market bottom 30% All 5 signals ▾Talenttop 23% Fundingtop 30% Globalbottom 33% Marketbottom 30% Techbottom 25% Talent: 8 named leaders on record · 7 C-suite/founder profiles curated Funding: Raised $17.2M across 3 rounds · 3 rounds over 1 yrs (3.0/yr) rank vs industry peers · Fliar Intelligence Index 27/100 | $17M | 7 mo ago | — | 2024 | WordPressMySQLPHP+14 | — | — |
| 30 | Found Energy Provider of hydrogen storage solution | $15M | 28 mo ago | 9 | 2022 | — | 162 patents Patents concentrated in transport & manufacturing processes | — |
| 31 | Feon Energy Provider of lithium battery technology solution | $14M | 23 mo ago | 8 | 2022 | — | — | 1 partnership |
| 32 | SunDensity Provider of nanotech-enabled PV coatings | $14M | 55 mo ago | 11 | 2016 | — | 18 patents Patents concentrated in electrical & electronics | — |
| 33 | FastCap Ultracapacitors Provider of ultraperformance capacitors powered by nanocarbon-based electrodes | $10M | 35 mo ago | 59 | 2009 | — | 23 patents High‑temperature ultracapacitor modules for downhole power and logging systems | — |
| 34 | Advent Provider of solutions for fuel cell | $9M | 77 mo ago | 37 37 → 41 (+11%) · sector median -8% | 2006 | WordPressApple iCloud MailMicrosoft 365+26 | 13 patents Patents concentrated in computing, sensing & instrumentation | — |
| 35 | Maat Energy Technology solution for hydrogen production | $6M | 59 mo ago | — | 2018 | — | — | — |
| 36 | Electrified Thermal Developer of novel heat battery for energy storage solutions | $4M | 9 mo ago | 8 | 2021 | WordPressMySQLPHP+13 | 19 patents Modular electrically conductive bricks for resistive heating and integrated thermal energy storage | 1 launch |
| 37 | Glimpse Battery quality monitoring system | $4M | 17 mo ago | — | 2023 | MUIReactEmotion+6 | 3 patents Automated visual content compliance checking for digital images | 1 job opening · 1 launch · 1 expansion |
| 38 | Optodot Developerof nanoporous separators for batteries | $4M | 92 mo ago | 11 | 2000 | — | 136 patents Nanoporous battery separators with integrated electrode coatings and enhanced thermal conductivity | — |
| 39 | Thiozen Provider of clean hydrogen production systems from H2S waste streams. | $3M | 27 mo ago | 5 | 2020 | — | — | — |
| 40 | Elementium Provider of battery components | $3M | 11 mo ago | — | 2024 | — | — | — |
| 41 | SiEnergy Systems Developer of optimized multimedia solutions for SOC, OEM, and ODM needs | $3M | 134 mo ago | 5 | 2007 | — | — | — |
| 42 | Blackburn Energy Provider of the kinetic energy conversion system | $2M | 53 mo ago | 5 | 2014 | — | — | — |
| 43 | Magnolia Solar Manufacturing thin film solar cell modules | $2M | 164 mo ago | — | 2008 | — | 22 patents Patents concentrated in electrical & electronics | — |
| 44 | PolyJoule Developer of conductive polymer batteries for safe, scalable energy storage | $1M | 34 mo ago | 18 | 2011 | WebflowSwiperjQuery+12 | 37 patents Polymer-based high‑capacity, high‑loading electrode materials for advanced electrochemical storage | 1 launch |
| 45 | Trenergi Fuel cell technology solutions | $672K | 142 mo ago | — | 2009 | — | 14 patents Integrated sealing and high‑temperature membrane electrode assemblies for fuel cell stacks. | — |
| 46 | Volta Energy Energy storage and management solutions | $475K | 21 mo ago | — | 2005 | — | — | — |
| 47 | ElectroChem Marketplace for fuel cells | $342K | 167 mo ago | — | 1986 | — | 68 patents High‑power lithium oxyhalide battery designs with carbon monofluoride cathodes | — |
| 48 | Kinetic Batteries Additive manufacturing technology for battery production | $170K | 94 mo ago | — | 2017 | — | — | — |
| 49 | XE-6 Tech Manufacturer of portable energy storage bases for survival utility applications | $125K | 4 mo ago | — | 2024 | — | — | — |
| 50 | Helix Power IoT-enabled building energy management system | $100K | 55 mo ago | 4 | 2013 | WixSentryVimeo+12 | — | — |
Top 12 Energy Storage Tech companies in Massachusetts
#1
Series D · Woburn, Massachusetts · founded 2013 · 175 employees$244.2Mraised▾
Series D · Woburn, Massachusetts · founded 2013 · 175 employees
Developer of sustainable solid-state batteries. Its various applications, including electric vehicles, homes, and critical infrastructure. Its battery technology is designed to be safe, sustainable, and scalable.
Fliar Intelligence Index™ 60how this company ranks against its industry peers
Funding
top 24%Talent
top 28%Moat
top 31%Growth
top 35%Tech
bottom 48%News
bottom 47%Funding: Raised $244M across 7 rounds · 7 rounds over 12 yrs (0.6/yr) · Last round Series D (Jan 2026)
Talent: 3 named leaders on record · 3 C-suite/founder profiles curated
Moat: Editorial + unicorn rating 8/10 · Soonicorn · 9 curated direct competitors tracked
Audience (LinkedIn): 22k LinkedIn followers — 5.9% of this cohort's audience
Activity (LinkedIn): 1 product launches · 1 partnerships (incl. Melmer-Benz AG EQS, Stellantis Dodge Charger Daytona, Karma Automotive Kaveya, Avidrone Aerospace Incorporated) announced in 12 mo
Funding rounds
- Jan 2026Series D—
- Jan 2022Series D$200M
- Nov 2021Series B—
- Nov 2021Series B—
Founders & team
Investors
Stellantis, Mercedes-Benz, WAVE Equity Partners, Helios Climate Ventures, NXT Ventures, New York State
Tech stack
Amazon Web ServicesAnime.JsApple Icloud MailCloudflareCloudflare Bot ManagementCookieyes
#2
Series B · Cambridge, Massachusetts · founded 2018 · 266 employees$98.3Mraised▾
Series B · Cambridge, Massachusetts · founded 2018 · 266 employees
Developer of long-duration energy storage systems using steam-based heat pump. The company's solution delivers dispatchable, cost-effective energy through utility-scale systems. The technology allows for integration into existing fossil assets. It provides intraday or interday energy storage with backup firing availability. The systems support grid resilience with synchronous power and load-following capabilities.
Fliar Intelligence Index™ 64how this company ranks against its industry peers
Innovation
top 16%Patents
top 17%Moat
top 19%Funding
top 28%Growth
top 45%Tech
top 46%Innovation: 272 patents (top 18% of patent-holders) · 184 filings since 2022 vs 88 in 2017-21 · Deep-tech classification: Tech Hardware
Patents: 272 patents matched (strict assignee match) · 184 filings since 2022 vs 88 in 2017-21 · Latest publication 2026
Moat: Editorial + unicorn rating 8/10 · IP moat: 272 patents · Soonicorn
Audience (LinkedIn): 25k LinkedIn followers — 6.6% of this cohort's audience
Activity (LinkedIn): 1 partnerships (incl. Acwa) announced in 12 mo
Funding rounds
- Dec 2025Series B$24M
- Nov 2023Series B$21.6M
- Aug 2021Series B—
- Feb 2021Series B$50.7M
Founders & team
Investors
Concord New Energy, Alfa Laval, Breakthrough Energy, Siemens Energy, PROMAN, Chevron Technology Ventures
Tech stack
ComplianzContact Form 7Core-JsElementorElementor Header & Footer BuilderHello Elementor
#3
Series H · Cambridge, Massachusetts · founded 2010 · 147 employees$500Mraised▾
Series H · Cambridge, Massachusetts · founded 2010 · 147 employees
Developer of battery technology for electric vehicles and energy storage. The company provides a suite of technologies designed to improve battery performance. These technologies address challenges related to cost, safety, energy density, and cold-weather performance. The company's products can be used independently or in combination with existing battery solutions.
Fliar Intelligence Index™ 69how this company ranks against its industry peers
Funding
top 18%Moat
top 22%Growth
top 26%Patents
top 32%Talent
top 38%Innovation
top 39%Funding: Raised $500M across 13 rounds · 13 rounds over 16 yrs (0.8/yr) · Last round Grant (prize money) (Jun 2025)
Moat: Editorial + unicorn rating 9/10 · IP moat: 288 patents · Unicorn
Growth: Headcount 86 → 147 (+71%) across vintages · Fresh capital in last 24 mo
Audience (LinkedIn): 21k LinkedIn followers — 5.4% of this cohort's audience
Activity (LinkedIn): 3 product launches announced in 12 mo
Funding rounds
- Jun 2025Grant (prize money)$10.3M
- Mar 2025Grant (prize money)$3.2M
- Sep 2024Series H$87M
- Jan 2022Series F—
Founders & team
Investors
CRV, North Bridge Venture Partners, PTT, DOE, ITOCHU, Kyocera
Tech stack
CloudflareCloudflare Bot ManagementCore-JsFont AwesomeGodaddyGoogle Analytics
#4
Series D · Westborough, Massachusetts · founded 2015 · 87 employees$1Braised▾
Series D · Westborough, Massachusetts · founded 2015 · 87 employees
Manufacturer of engineered materials from recycled lithium-ion batteries and battery scrap. The company utilizes a direct precursor synthesis process to transform discarded batteries and manufacturing scrap into active cathode battery material. This process recovers critical elements for reuse in lithium-ion battery manufacturing. The company provides logistics, material-tracking, and customer support services.
Fliar Intelligence Index™ 80how this company ranks against its industry peers
Funding
top 13%Innovation
top 21%Patents
top 22%News
top 24%Moat
top 25%Growth
top 27%Funding: Raised $1.0B across 10 rounds · 10 rounds over 4 yrs (2.5/yr) · Last round Grant (prize money) (Feb 2025)
Innovation: 98 patents (top 28% of patent-holders) · 98 filings since 2022 vs 0 in 2017-21 · Deep-tech classification: Tech Hardware
Patents: 98 patents matched (strict assignee match) · 98 filings since 2022 vs 0 in 2017-21 · Latest publication 2026
Audience (LinkedIn): 33k LinkedIn followers — 8.6% of this cohort's audience
Funding rounds
- Feb 2025Grant (prize money)—
- Feb 2024Series D$162M
- Sep 2023Series D$460.1M
- Sep 2023Grant (prize money)$480.6M
Founders & team
Investors
DOE, SK Eco Plant, BlackRock, Temasek, Qatar Investment Authority, Tenaska
Tech stack
CloudflareCloudflare Bot ManagementComplianzCore-JsElementorGoogle Analytics
#5
Series F · Somerville, Massachusetts · founded 2009 · 372 employees$1.1Braised▾
Series F · Somerville, Massachusetts · founded 2009 · 372 employees
Clean energy technology platform developing long-duration iron-air battery systems. It develops advanced battery solutions capable of storing electricity for multiple days, helping balance energy supply and demand during periods of high stress or renewable energy intermittency. It is designed to support the transition to a cleaner and more resilient electric grid by enabling greater integration of renewable energy sources such as wind and solar. Its technology centers on cost-effective, scalable battery systems built for long-duration storage applications, addressing critical gaps in traditional short-duration energy storage solutions.
Fliar Intelligence Index™ 83how this company ranks against its industry peers
Patents
top 11%Funding
top 15%Innovation
top 16%Moat
top 26%Product
top 28%Growth
top 31%Patents: 358 patents matched (strict assignee match) · 302 filings since 2022 vs 54 in 2017-21 · Latest publication 2026
Funding: Raised $1.1B across 9 rounds · 9 rounds over 8 yrs (1.1/yr) · Last round Series F (Jan 2025)
Innovation: 358 patents (top 7% of patent-holders) · 302 filings since 2022 vs 54 in 2017-21 · 2 product lines
Audience (LinkedIn): 81k LinkedIn followers — 21.3% of this cohort's audience · 138 engagements/post (4.9× cohort median)
Hiring (LinkedIn): 1 hiring post in 12 mo (public) · hiring: engineers
Funding rounds
- Jan 2026Series F—
- Oct 2024Series F$405M
- Aug 2023Grant (prize money)$12M
- Sep 2022Series E$450M
Founders & team
Investors
ARPA-E, Coatue, Energy Impact Partners, Temasek, NGP Energy Technology Partners, Prelude Ventures
Tech stack
AccessibeApple Icloud MailCloudflareCloudflare Bot ManagementCookieyesCore-Js
#6
Series E · Boston, Massachusetts · founded 2009 · 66 employees$49.6Mraised▾
Series E · Boston, Massachusetts · founded 2009 · 66 employees
Provider of nanotech based electrode materials for supercapacitors. It offers nanotech-enabled electrodes, ultracapacitors, and thermal interface gap filler pads for electric vehicle batteries. Its features include low cost, high cell-level energy density, fast charging performance, thermal interface gap filler and roll-to-roll coating, and calendering equipment.
Fliar Intelligence Index™ 72how this company ranks against its industry peers
Growth
top 17%Funding
top 19%Patents
top 26%Moat
top 28%Talent
top 28%Innovation
top 31%Growth: Headcount 39 → 66 (+69%) across vintages · Fresh capital in last 24 mo
Funding: Raised $49.6M across 24 rounds · 24 rounds over 16 yrs (1.5/yr) · Last round Series E (Nov 2025)
Patents: 36 patents matched (strict assignee match) · 36 filings since 2022 vs 0 in 2017-21 · Latest publication 2026
Audience (LinkedIn): 5k LinkedIn followers
Activity (LinkedIn): 1 product launches · 1 partnerships (incl. Top Material) announced in 12 mo
Funding rounds
- Nov 2025Series E$54M
- Sep 2025Series D—
- Apr 2025Grant (prize money)$47.5M
- Jan 2025Grant (prize money)$47.5M
Founders & team
Investors
Fortistar, GM Ventures, Marubun, Niterra, Catalus Capital, Samsung Venture Investment
Tech stack
Hubspot Cms HubHubspotJqueryCloudflare Bot ManagementGoogle Font ApiGlide.Js
#7
Series D · Boston, Massachusetts · founded 2017 · 35 employees$56.6Mraised▾
Series D · Boston, Massachusetts · founded 2017 · 35 employees
Offering solutions for solid oxide fuel generators. It aims to replace internal combustion engines for backup and off-grid applications.
Fliar Intelligence Index™ 50how this company ranks against its industry peers
Funding
top 20%Product
top 21%Moat
top 21%Patents
top 34%Innovation
top 35%Talent
top 38%Funding: Raised $56.6M across 8 rounds · 8 rounds over 9 yrs (0.9/yr) · Last round Series D (Sep 2025)
Product: 12 distinct product lines · Company stage: Series D
Moat: Editorial + unicorn rating 8/10 · IP moat: 46 patents · Soonicorn
Funding rounds
- Sep 2025Series D$306.6K
- Dec 2024Series D$2.1M
- Jul 2024Series D$22.5M
- Nov 2022Series C$17M
Founders & team
Investors
ITOCHU, Enphase Energy, Sunnova, Rogers Capital, H+ Partners, Cricetus Felix Ventures
Tech stack
ElementorFramer SitesGodaddyGoogle AnalyticsGoogle Font ApiHsts
#8
Series A · Boston, Massachusetts · founded 2014 · 50 employees$91.5Mraised▾
Series A · Boston, Massachusetts · founded 2014 · 50 employees
Provider of charging solutions for electric vehicles. The company focused on the development of portable electric vehicle charging points. It provides EV charging solutions for businesses.
Fliar Intelligence Index™ 64how this company ranks against its industry peers
Funding
top 19%Innovation
top 25%Moat
top 28%Patents
top 30%Growth
top 38%Tech
top 47%Funding: Raised $91.5M across 13 rounds · 13 rounds over 9 yrs (1.4/yr) · Last round Series A (May 2025)
Innovation: 36 patents (top 38% of patent-holders) · 26 filings since 2022 vs 10 in 2017-21 · Deep-tech classification: Tech Hardware
Moat: Editorial + unicorn rating 8/10 · IP moat: 36 patents · Soonicorn
Audience (LinkedIn): 17k LinkedIn followers — 4.5% of this cohort's audience · 49 engagements/post (1.7× cohort median)
Activity (LinkedIn): 1 awards announced in 12 mo
Funding rounds
- May 2025Series A$15.5M
- May 2025Venture Debt$15M
- Sep 2024Series A$13.3M
- May 2023Series A$7M
Founders & team
Investors
Cleveland Avenue, Mark Cuban Companies, Tale VP, Pendulum, SVB, Summer Watson
Tech stack
Amazon SesAmazon Web ServicesCloudflareCloudflare Bot ManagementCore-JsGoogle Font Api
#9
Seed · Somerville, Massachusetts · founded 2024$17.2Mraised▾
Seed · Somerville, Massachusetts · founded 2024
Developer of a subsurface process for producing ammonia from iron resources. It utilizes oil and gas techniques to inject engineered fluids. This process harnesses the chemical and thermal potential of the earth. The aim is to split water into hydrogen and oxygen. The hydrogen then reacts to produce ammonia. This production method is intended to be cheaper and less energy-intensive.
Fliar Intelligence Index™ 27how this company ranks against its industry peers
Talent
top 23%Funding
top 30%Global
bottom 33%Market
bottom 30%Tech
bottom 25%Talent: 8 named leaders on record · 7 C-suite/founder profiles curated
Funding: Raised $17.2M across 3 rounds · 3 rounds over 1 yrs (3.0/yr) · Last round Seed (Nov 2025)
Global: Single-market focus (United States)
Funding rounds
- Nov 2025Seed$8.4M
- Jan 2025Seed$4.2M
- Jan 2025Grant (prize money)$4.5M
Founders & team
Investors
Engine Ventures, Blindspot Ventures, Voyager, Pillar VC, ARPA-E, At One Ventures
Tech stack
Apache Http ServerContact Form 7GodaddyGoogle Font ApiJqueryJquery Migrate
#10
Seed · Marlborough, Massachusetts · founded 2019$27.7Mraised▾
Seed · Marlborough, Massachusetts · founded 2019
Organic flow energy storage solution. It utilizes organic chemistry technology to develop energy storage systems for grid-scale energy storage applications.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 2k LinkedIn followers
Funding rounds
- Aug 2025Seed$10M
- Apr 2024Seed$7.7M
- Feb 2023Seed$10M
- Seed—
Founders & team
Investors
Myriad Venture Partners, Xerox Ventures, Catalus Capital, SIP Global Partners, America’s Seed Fund, Third Derivative
Tech stack
AngularCart FunctionalityCore-JsGoogle Font ApiHstsModernizr
#11
Series A · Cambridge, Massachusetts · founded 2021$19Mraised▾
Series A · Cambridge, Massachusetts · founded 2021
Energy storage solutions for grid. Its technology makes renewable energy an on-demand energy source through utility-scale thermal storage.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 4k LinkedIn followers
Funding rounds
- Sep 2025Series A$20M
- Dec 2023Series A$19M
Founders & team
Investors
DCVC, Breakthrough Energy, BVCC, Munich Re
Tech stack
Backbone.JsCdnjsCloudflareCloudflare Browser InsightsComplianzFont Awesome
#12
Funding Raised · Billerica, Massachusetts · founded 2000 · 102 employees$38.3Mraised▾
Funding Raised · Billerica, Massachusetts · founded 2000 · 102 employees
Developer of hydrogen fuel cell engines and power generation systems. It designs and manufactures fuel cell engines for various applications, including on-road and off-road vehicles, port equipment, and stationary power generators. The company also provides vehicle integration support and aftermarket services. Its offerings include the E-Series fuel cell engines and the HydroCharge hydrogen-powered generator. These solutions are designed for efficiency, reliability, and performance, addressing the need for zero-emission power in diverse sectors. The company supports its products with a global service and support network.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 19k LinkedIn followers — 5.0% of this cohort's audience
Activity: 1 product launches · 2 partnerships (incl. K2 Pure Solutions and PACC Services) announced in 12 mo
Funding rounds
- Apr 2025Grant (prize money)—
- Sep 2011Grant (prize money)$7.4M
- Jul 2011Grant (prize money)$5.7M
- Mar 2010Grant (prize money)$4M
Investors
OSTI
Tech stack
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Funding & investor landscape
$5.4Btotal disclosed funding
55companies funded
250disclosed rounds
0rounds last 90 days
Most active investors
Notable founders
Hector Abruna
Co-Founder · Factorial Energy
Siyu Huang
Co-Founder and CEO · Factorial Energy
Michael Geyer
Managing Director · Malta
Yet Chiang
Co-Founder & Chief Scientist · 24m Technologies
Naoki Ota
President & CEO · 24m Technologies
Yan Wang
Co-Founder · Ascend Elements
Eric Gratz
Co-Founder & CTO · Ascend Elements
Ted Wiley
Co-Founder + President & COO · Form Energy
William Woodford
Co-Founder & CTO · Form Energy
John Cooley
Founder & CEO · Nanoramic
Eric Kish
CEO · Nanoramic
Nate Palumbo
Chief Technology Officer and Founder · Upstart Power
Prism market signals · United States · country-scoped Prism corpus, 1,481,159 docs
Market landscape — 10 sub-themes by coverage
Share of Energy Storage Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
RESEARCH IN MASSACHUSETTS · Energy
How research on Energy Storage in Massachusetts is moving
A read on the academic research around Energy Storage in Massachusetts — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 166 papers.
MIT and UMass institutions lead Massachusetts energy-storage research, dominated by advanced battery materials and technologies, with a cautiously optimistic tone (mean stance 0.45) skewing toward breakthroughs.
166 papers · stance +0.45 · 39% breakthrough · 25% concern
top institutions
- Massachusetts Institute of Technology124
- University of Massachusetts Lowell15
- University of Massachusetts Amherst14
- University of Massachusetts Dartmouth11
- Emmanuel College - Massachusetts3
leading researchers
Fikile R. Brushett · Bertrand J. Neyhouse · Nicholas J. Matteucci · Ertan Ağar · Caiwei Shen · Shabdiki B. Chaurasia
prism intelligence · tone & topics
95% positive · 1% critical tone
BusinessEnvironmentTransportationMaterials ScienceSustainabilityAutomotive
▲
Breakthroughs59 · 36%
▼ 50%→33% share
▼0.7× share momentum5 median citations69% since 2021mostly methods-led
Anode and Faraday-efficiency research newly emerged with 8 and 4 papers, signaling fresh electrochemical-optimization breakthroughs.
rising sub-themes (early→recent)
- Electrolyte4→12
- Battery (electricity)5→11
- Electrode2→7
- Electrochemistry4→7
- Redox3→5
Newly emergingAnode 0→8 · Faraday efficiency 0→4 · Dissolution 0→4
Landmark Observation of Pseudocapacitive Effect and Fast Ion Diffusion in Bimetallic Sulfides as an Advanced Sodium‐Ion Battery A · 531 cites
◆
Advancements53 · 32%
▲ 18%→36% share
▲2.0× share momentum2 median citations87% since 2021mostly empirical
Renewable-energy advancements newly emerged at 12 papers as Advancements field-share doubled from 18% to 36%.
rising sub-themes (early→recent)
- Battery (electricity)1→10
- Cathode1→3
- Electrochemistry3→5
- Process engineering1→3
Newly emergingRenewable energy 0→12 · Electrolyte 0→10 · Redox 0→8
Landmark Pathways to low-cost electrochemical energy storage: a comparison of aqueous and nonaqueous flow batteries · 717 cites
▼
Concerns38 · 23%
▲ 18%→25% share
▲1.4× share momentum1 median citations82% since 2021mostly empirical
Flow-battery and Electrochemistry concerns newly emerged at 10 papers each, while Electrolyte concerns tripled from 1 to 12.
rising sub-themes (early→recent)
- Electrolyte1→12
- Battery (electricity)2→10
Newly emergingElectrochemistry 0→10 · Flow battery 0→10 · Redox 0→8
Landmark Electrode Materials for Rechargeable Sodium‐Ion Batteries: Potential Alternatives to Current Lithium‐Ion Batteries · 3,318 cites
Common questions
How many Energy Storage Tech companies are there in Massachusetts, United States?
Radar tracks 88 indexable Energy Storage Tech companies headquartered in Massachusetts, United States that meet our profile-completeness bar.
What is the total funding raised by Energy Storage Tech companies in Massachusetts, United States?
The Energy Storage Tech companies in Massachusetts, United States on this list have raised a combined $5.4B in disclosed equity funding across 55 funded companies.
Which is the highest-funded Energy Storage Tech company in Massachusetts, United States?
Form Energy is the highest-funded Energy Storage Tech company in Massachusetts, United States, with $1.1B in disclosed equity funding.
How many Energy Storage Tech companies in Massachusetts, United States are funded?
55 of the 88 Energy Storage Tech companies in Massachusetts, United States on this list have disclosed at least one equity funding round.
How many Energy Storage Tech unicorns are there in Massachusetts, United States?
2 Energy Storage Tech companies in Massachusetts, United States on this list are valued at $1B or more.
Who are the top investors in Massachusetts, United States Energy Storage Tech companies?
The most active investors in Massachusetts, United States Energy Storage Tech companies on this list include Greentown Labs, OSTI, DOE, MassChallenge, Masscec.
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.