What Alsym Energy does

Alsym Energy is a privately held U.S. stationary energy storage company developing non-flammable, high-performance sodium-ion batteries as an alternative to lithium-ion for AI data centers, utilities, defense, and industrial applications. Founded in 2015 and headquartered in Malden, Massachusetts, the company has assembled a 51–100-person team and is led by co-founder and CEO Mukesh Chatter alongside MIT Professor Dr. Kripa Varanasi and RPI Professor Dr. Nikhil Koratkar, with a board including former GE CTO Dr. Mark Little and former Harvard Business School Dean Dr. Nitin Nohria. The company's flagship product is the Na-Series sodium-ion battery line, built on a proprietary NFPP+ (sodium-iron-phosphate-polyanionic) cathode chemistry that the company validates as non-flammable (ARC-tested to 400°C with no thermal runaway), cobalt-, nickel-, and lithium-free, and UL 9540A-compliant at the cell level. Cells deliver 250 Wh/L and 135 Wh/kg energy density, support over 10,000 cycles and a 20-year service life, achieve greater than 95% round-trip efficiency, operate across -40°C to 60°C with passive cooling, and accept 2C continuous and 6C pulse charge-discharge rates.

Alsym's R&D is built on a proprietary Physics-Informed AI Platform that combines fundamental physics, machine learning, autonomous robotic experimentation, and molecular diagnostics into a closed-loop development pipeline, which the company reports compresses battery development cycles approximately 10x versus traditional trial-and-error. The business model is B2B sales-led, targeting OEMs, integrators, developers, and utilities through direct enterprise engagement and strategic channel partnerships, with pricing negotiated quote-by-quote under multi-year contracts. Customer commitments disclosed to date include an 8.5 GWh letter of intent with ESS Tech, Inc. (April 30, 2026) and a 500 MWh partnership with Juniper Energy for California deployments (May 12, 2026). Alsym is in early commercialization: cells and modules are scheduled to ship to strategic partners starting Q3 2026, with planned domestic cell manufacturing at Re:Build Manufacturing's New Kensington, Pennsylvania facility under an MOU signed June 1, 2026, aimed at qualifying for the IRA 45X Advanced Manufacturing Production Credit and Defense procurement eligibility. The company has raised approximately $113 million to date, including a $78 million Series C closed in February 2024 led by General Catalyst and Tata Limited, and chairs the American Battery Leadership Coalition (ABLC) industry group.

Name

Alsym Energy

Legal name

Alsym Energy Inc.

Website

https://alsym.com

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

51–100 employees

Short description

Alsym Energy develops non-flammable sodium-ion batteries (Na-Series) using proprietary NFPP+ chemistry for stationary energy storage across AI data centers, utilities, defense, industrial, mining, commercial, microgrid, and residential applications in the United States.

Ownership category

akta.pro rank

Product category

Stationary Energy Storage / Sodium-Ion Batteries

NAICS

Battery Manufacturing (33591), Battery Manufacturing (335910)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600)

akta.pro primary industry

Battery Cells (Li-ion, LFP, Sodium-ion, Lead-acid, NiMH) (IMAGAHAA)

akta.pro secondary industry

Battery Modules & Packs (Industrial/Commercial pack assembly) (IMAGAHAB)

Keywords

• Sodium-ion batteries
• Stationary energy storage
• Battery energy storage systems
• Non-flammable battery cells
• Grid-scale storage

Headquarters

HQ city

Malden

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Technology or R&D, Personnel, Supply Chain, Operations, Infrastructure, Marketing or Sales

Revenue model

1. Hardware Sales (Cells and Modules): Alsym is in early commercialization. The company will begin shipping cells and modules to strategic partners starting in Q3 2026. Revenue is generated through sales of Na-Series sodium-ion battery cells and modules to OEMs, integrators, and developers under multi-gigawatt commitments (e.g., 8.5 GWh LOI with ESS Tech, 500 MWh partnership with Juniper Energy, manufacturing MOU with Re:Build).

Pricing tiers

Go-to-market motion3 records

Distribution channels3 records

Marketing channels8 records

Core offering

Alsym Energy designs, develops, and is commercializing non-flammable, high-performance, low-cost Na-Series sodium-ion battery cells and modules for stationary energy storage, using its proprietary NFPP+ cathode chemistry and a proprietary physics-informed AI development platform. The company sells these cells and modules to OEMs, integrators, developers, utilities, and large end-users across data centers, defense, utility & municipal, commercial real estate, industrial, mining, microgrid, urban, and residential applications, with shipments to strategic partners beginning in Q3 2026.

Product overview

Alsym Energy offers a single-product platform centered on its Na-Series sodium-ion batteries — a non-flammable, cobalt- and lithium-free stationary energy storage solution built on a proprietary NFPP+ chemistry — supported internally by the proprietary Physics-Informed AI Platform that drives chemistry discovery, cell co-design, and manufacturing scale-up. The Na-Series product is positioned as one platform serving nine distinct application verticals documented on the website: Data Centers, Defense, Residential, Utility & Municipal, Commercial Real Estate, Industrial, Mining, Urban Areas, and Microgrids. The Physics-Informed AI Platform is not a separately sold product but functions as Alsym's differentiating R&D engine that produced and continues to improve the Na-Series chemistry and cell architecture.

Differentiator

Problem solved

Functional benefit

Brands

• Na-Series: Alsym's flagship line of non-flammable, high-performance, low-cost sodium-ion batteries made with earth-abundant materials, designed for stationary energy storage applications across data centers, utilities, commercial real estate, defense, industrial, residential, mining, microgrids, and urban areas.
• NFPP+

Products and services

• Alsym Na-Series Sodium-Ion Batteries Flagship line of non-flammable, high-performance, low-cost sodium-ion battery cells and modules built on Alsym's proprietary NFPP+ cathode chemistry. Delivers 250 Wh/L and 135 Wh/kg energy density, over 10,000 cycles (~20-year service life), >95% round-trip efficiency, -40°C to 60°C operating range using passive cooling only, and 2C continuous charge/discharge (up to 6C pulse). Qualified to UL 9540A at the cell level with no thermal runaway. Aluminum current collectors enable safe storage and transport at 0% State of Charge. Sold to OEMs, integrators, developers, utilities, and large end-users across data centers, defense, residential, utility & municipal, commercial real estate, industrial, mining, urban, and microgrid applications.

Quantifiable outcome

• Eliminates 23–30% of total project cost by removing HVAC and fire suppression
• +9 more outcomes

Named customers2 records

Segments9 records

Ideal customer profiles6 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability7 records

Feature9 records

Partnerships

13 partnerships are on record, tiered major, flagship and minor.

• American Battery Leadership Coalition (ABLC)majorStrategic or Co-development Partner · 18 June 2026Alsym chairs the newly formed American Battery Leadership Coalition (ABLC), with Peak Energy as vice chair. Coalition members include Batri, ESS Tech, Ingevity, Mana, Microporous, NAION, and Re:Build Manufacturing. Advocates for federal policies supporting sodium-ion commercialization and domestic supply chain development.
• Re:Build ManufacturingflagshipStrategic or Co-development Partner · 1 June 2026MOU signed June 1, 2026 to partner on commercial-scale sodium-ion battery cell manufacturing in the U.S., leveraging Re:Build's existing New Kensington, PA facility. Aims to qualify for the IRA 45X Advanced Manufacturing Production Credit and Defense procurement rules while reducing logistical lead times.
• Juniper EnergyflagshipChannel Partner/ Reseller/ Distributor · 12 May 2026Strategic partnership announced May 12, 2026 to deploy 500 MWh of Alsym Na-Series BESS primarily across California, including the Mojave Desert and other high-temperature regions. Leverages Alsym's domestically manufactured cells to maximize One Big Beautiful Bill tax credits and DOE incentives; Juniper to take advantage of passive cooling in extreme heat.
• ESS Tech, Inc.flagshipStrategic or Co-development Partner · 30 April 2026Letter of intent signed April 30, 2026 for a strategic partnership to add 8.5 GWh of Alsym sodium-ion cells and modules to ESS's portfolio. Combines Alsym's non-flammable Na-Series with ESS's Energy Base iron-flow platform to offer a unified, non-lithium storage solution spanning short-, medium-, and long-duration applications. Targets utilities, IPPs, data centers, and C&I customers.
• DIB ConsortiumminorOthersListed among Alsym's industry associations on the About page.
• milpwr.orgminorOthersListed among Alsym's industry associations on the About page.
• LDES Consortium (Sandia)minorOthersListed among Alsym's industry associations on the About page.
• NY-BESTminorOthersListed among Alsym's industry associations on the About page (New York Battery and Energy Storage Technology Consortium).
• Volta FoundationminorOthersListed among Alsym's industry associations on the About page.
• NAATBattminorOthersListed among Alsym's industry associations on the About page.
• CMG / CEEDminorOthersListed among Alsym's industry associations on the About page.
• Massachusetts Institute of Technology (MIT)majorStrategic or Co-development PartnerAlsym co-founder Dr. Kripa Varanasi is a Professor of Mechanical Engineering at MIT; the company's physics-informed AI platform is rooted in MIT research, and MIT-related advisors (Dr. Sanjay Sarma) sit on the advisory board.
• Rensselaer Polytechnic Institute (RPI)majorStrategic or Co-development PartnerAlsym co-founder Dr. Nikhil Koratkar is the John A. Clark and Edward T. Crossan Chair Professor in Engineering at RPI; CEO Mukesh Chatter is an RPI alumnus and board trustee.

Scale indicators10 records

Recent moves8 records

Expansion highlights7 records

Direct peers

• Faradion: Faradion is a UK-based sodium-ion battery technology company targeting stationary storage and mobility applications. Both companies share a sodium-ion chemistry focus, multi-vertical commercialization strategy, and emphasis on low-cost, abundant materials versus lithium.
• Peak Energy: Peak Energy is a US-based sodium-ion battery developer for stationary energy storage, and serves as vice-chair of the American Battery Leadership Coalition alongside Alsym. Both companies target grid-scale and C&I stationary storage with non-lithium chemistry, making them the closest US-headquartered sodium-ion peers.
• Natron Energy: Natron Energy develops Prussian blue sodium-ion batteries for data centers, EV fast charging, and industrial applications. Like Alsym, Natron emphasizes safety, long cycle life, and domestic manufacturing for behind-the-meter and stationary storage use cases.
• Altris: Altris is a Swedish sodium-ion battery developer using a Prussian White cathode chemistry for stationary storage and EV applications. Altris is comparable to Alsym as a European-headquartered sodium-ion startup pursuing the same non-lithium, abundant-materials value proposition for ESS.

Emerging players

• EnerVenue: EnerVenue builds metal-hydrogen batteries for stationary storage, with similar non-flammable, long-life, wide-temperature positioning. Alsym's VP of Sales previously led global sales at EnerVenue, and both companies target utility, C&I, and microgrid customers with non-lithium chemistries.
• Form Energy: Form Energy is a US iron-air battery developer focused on long-duration (100+ hour) stationary storage for utilities. Like Alsym, Form targets grid-scale storage with low-cost, abundant materials and a domestic manufacturing thesis, although its chemistry targets longer duration rather than Alsym's flexible 30-minute-to-110-hour window.

Broad incumbents

• BYD: BYD is a global battery and EV incumbent with both lithium-iron-phosphate and sodium-ion product lines targeting utility storage and EV applications. BYD represents the cost-and-scale benchmark Alsym must beat in stationary storage and is one of the China-dominated incumbents Alsym's FEOC positioning is designed to displace.
• Fluence Energy: Fluence is a global stationary storage system integrator with utility-scale, C&I, and grid-services deployments. Although Fluence is a battery integrator rather than a chemistry developer, it competes for the same utility and data-center ESS contracts that Alsym targets and shapes the competitive landscape for cell-level entrants.
• Wärtsilä Energy Storage: Wärtsilä is a global energy storage system integrator whose ES&O team has deployed >7.5 GWh of utility-scale battery storage. Alsym advisor Darrell Furlong is VP of Energy Storage PM at Wärtsilä, and Wärtsilä represents a competing platform for the utility-scale customers Alsym targets.
• ESS Tech: ESS Tech is a public US stationary storage company using iron-flow battery chemistry for long-duration applications. While ESS is also an Alsym channel partner (8.5 GWh LOI), it competes in adjacent duration segments of the stationary storage market and brings flow-battery incumbency to the same customer set.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks7 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/AlsymEnergy
• LinkedInlinkedin.com/company/alsym-energy
• Xx.com/AlsymEnergy

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles15 records

Funding overview

Funding rounds5 records

Investors7 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Alsym Energy