Antora Energy
Antora Energy is a 2017 MIT spin-out that builds modular thermal battery systems using solid-carbon blocks and proprietary thermophotovoltaic cells to deliver low-cost, always-on heat and power to industrial facilities and data centers under long-term offtake agreements.
- Company typePrivate
- Founded2017
- HeadquartersSan Jose, United States
- Headcount251–500
- GTM typeB2B
- OfferingHardware or Manufacturing
What Antora Energy does
Antora Energy is a 2017 MIT spin-out headquartered in Sunnyvale, California, that designs and manufactures modular thermal battery systems for industrial and data-center customers. Its core product stores surplus clean electricity as heat in solid-carbon blocks at temperatures up to 4,000°F (approximately 2,200°C), then discharges either as high-temperature process heat for industry or as electricity through proprietary thermophotovoltaic (TPV) cells that have achieved 40% conversion efficiency at 1,900–2,400°C, surpassing the historical 32% benchmark. Factory-built modules scale from megawatts to gigawatts and are deployed on customer sites under long-term heat and power offtake agreements.
The company targets industrial facilities — including renewable fuels, chemicals, refining, steel, concrete, mining, pulp and paper, and food and beverage — as well as data centers requiring large volumes of low-cost, reliable electricity. Its flagship deployment, Project Big Stone, is a 5 GWh system at POET's Big Stone City, South Dakota bioprocessing facility, delivering 50 MW of around-the-clock energy under a long-term offtake agreement enabled by a bespoke utility tariff developed with Otter Tail Power and approved in Minnesota, North Dakota, and South Dakota. The company has raised approximately $200M cumulatively, including a $150M Series B led by BlackRock and Temasek in February 2024, and has received ARPA-E support ($7.9M in 2019, $14.5M selected in 2024).
Revenue derives from hardware sales of thermal battery systems combined with long-term, recurring offtake agreements for continuous heat and power delivery. Customers are reached through enterprise field sales and utility partnerships (Otter Tail Power, Con Edison, with a potential Shell project in development). Manufacturing is based in San Jose, California, where Antora doubled its footprint to approximately 101,000 square feet in 2026 to meet growing demand, particularly from data centers. The company acquired Medley Thermal in December 2022 to consolidate thermal-storage IP.
Antora Energy firmographics
Firmographics- Name
- Antora Energy
- Legal name
- Antora Energy
- Website
- https://antoraenergy.com
- Company type
- Private
- Founded year
- 2017
- Operating status
- Operating
- Headcount range
- 251–500 employees
- Short description
- Antora Energy is a 2017 MIT spin-out that builds modular thermal battery systems using solid-carbon blocks and proprietary thermophotovoltaic cells to deliver low-cost, always-on heat and power to industrial facilities and data centers under long-term offtake agreements.
- Ownership category
- akta.pro rank
Antora Energy industry classification
Industry- Product category
- Industrial Thermal Energy Storage
- NAICS
- Power Boiler and Heat Exchanger Manufacturing (33241), Electric Power Generation (22111), Steam and Air-Conditioning Supply (22133)
- SIC
- Cogeneration Services & Small Power Producers (4991), Heating Equipment, Except Electric & Warm Air Furnaces (3433), Industrial Process Furnaces & Ovens (3567)
- akta.pro primary industry
- Thermal LDES (High-Temperature, Molten Salt, Carnot/Heat-to-Power) (EUAFADAC)
- akta.pro secondary industries
- Industrial Process Heat TES (Steam, Kilns, Furnaces, Waste-Heat Coupling) (EUAFANAI), Onsite Low-Carbon Heat & CHP (Electrified CHP, Fuel Cells, Renewable CHP) (EUABAJAI), TES Components & Balance-of-Plant (Heat Exchangers, Tanks, Insulation, Pumps, Valves) (EUAFANAL)
Keywords
Where Antora Energy is headquartered
LocationHeadquarters
- HQ city
- San Jose
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Antora Energy business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Supply Chain, Operations, Personnel, Marketing or Sales
Revenue model
- Thermal Battery System Sales: Antora Energy sells thermal battery systems to industrial customers for on-site energy storage and delivery. Systems are deployed under long-term heat offtake agreements, providing customers with 50 MW of around-the-clock energy at competitive pricing.
- Long-term Heat/Power Offtake Agreements: Under long-term offtake agreements, Antora provides industrial facilities with continuous heat and power delivery, creating recurring revenue streams. Example: Project Big Stone provides POET with 50 MW of competitively priced, around-the-clock energy.
Go-to-market motion2 records
Distribution channels1 record
Marketing channels5 records
Antora Energy product offering
Product offeringCore offering
Antora Energy manufactures modular thermal battery systems that use solid carbon blocks to store energy as heat at up to 4,000°F. The systems charge from surplus clean electricity and then either dispatch electricity via proprietary thermophotovoltaic (TPV) cells or deliver high-temperature heat directly to industrial customers, enabling 24/7 clean heat and power.
Product overview
Antora Energy offers a unified thermal battery product system for industrial heat and power applications. The core product consists of modular thermal battery units that store cheap, clean electricity as heat in solid carbon blocks, capable of delivering always-on heat and power at industrial scale. The system integrates proprietary thermophotovoltaic (TPV) cells for electricity conversion and can also supply high-temperature process heat directly. Factory-built modules scale from megawatts to gigawatts, serving industries including renewable fuels, food & beverage, data centers, chemicals, mining, concrete & lime, pulp & paper, refining, and steel & iron. Project Big Stone represents the company's first large-scale commercial deployment.
Differentiator
Problem solved
Functional benefit
Products and services
- Thermal Battery System Modular, factory-built thermal battery system that stores energy as heat in solid carbon blocks at up to 4,000°F and discharges electricity via thermophotovoltaic (TPV) cells or delivers high-temperature heat directly. Designed for industrial facilities, data centers, and utilities requiring always-on clean heat and power.
Quantifiable outcome
- 40% TPV conversion efficiency at 1,900-2,400°C
- +4 more outcomes
Companies that use Antora Energy
Customer profileNamed customers1 record
Segments3 records
Ideal customer profiles3 records
Antora Energy technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Antora Energy partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered flagship, core and potential.
- Otter Tail PowerflagshipOtter Tail utility worked with Antora and POET to develop a specialized 'thermal market energy pricing rider' tariff that links Antora's electricity draw to periods of surplus renewable energy, enabling competitive pricing. The tariff has been approved in Minnesota, North Dakota, and South Dakota.
- POETcoreAntora and POET commissioned a 5 GWh thermal battery system at POET's Big Stone City bioprocessing facility in South Dakota. Under a long-term heat offtake agreement, the system provides 50 MW of competitively priced, around-the-clock energy to increase bioethanol production. The project was completed in under one year.
- Con EdisoncoreAntora Energy was selected by ARPA-E to negotiate a $14.5 million award for its combined heat and power thermal battery product, including partnerships with Con Edison for industrial and utility applications.
- ShellpotentialAntora Energy was selected by ARPA-E for a $14.5 million award, including a potential project with Shell as part of the funding to enable gigaton-scale decarbonization in the industrial sector.
Scale indicators8 records
Recent moves8 records
Expansion highlights8 records
Antora Energy competitors and assessment
Company assessmentDirect peers
- Highview Power: Highview Power develops liquid air energy storage (LAES) plants for grid-scale long-duration storage, directly competing with Antora in the long-duration energy storage category for industrial and utility customers.
- Energy Vault: Energy Vault develops gravity- and thermal-based long-duration energy storage systems and competes head-to-head with Antora for utility-scale LDES and industrial decarbonization contracts globally.
- Rondo Energy: Rondo Energy is the closest direct peer — it industrializes thermal energy storage for industrial heat decarbonization, using heated solid media and serving overlapping customers (chemicals, food & beverage, refining) with similar factory-built modular hardware.
- ESS Inc. ESS Inc. builds iron-flow batteries for long-duration storage, targeting utility and industrial customers seeking multi-hour to multi-day discharge — a competing LDES technology path to Antora's thermal storage.
- Brenmiller Energy: Brenmiller Energy produces bGen thermal storage systems for industrial steam and heat, targeting the same industrial heat decarbonization use case as Antora with modular, factory-built hardware.
- 1414 Degrees: 1414 Degrees (TESS) developed molten-silicon thermal storage for industrial heat and grid applications — a direct technical comparison to Antora's solid-carbon thermal battery for industrial process heat.
- Form Energy: Form Energy is a leading US long-duration storage competitor developing iron-air batteries for multi-day discharge, competing for the same utility and industrial decarbonization customers and capital as Antora.
Emerging players
- Malta Inc. Malta is a Google X spin-out developing pumped heat electricity storage for long-duration grid applications, an emerging alternative in the LDES space with overlapping technical ambitions.
- Electrified Thermal Solutions (Jupiter Ionics / Electric Heat): Electrified Thermal Solutions (ETS) develops Joule Hive thermal battery technology for industrial decarbonization, an emerging US-based peer in electrified industrial heat that competes for similar customer RFPs.
Broad incumbents
- Tesla (Megapack / Energy): Tesla's Megapack business is the dominant lithium-ion BESS incumbent competing for the same utility-scale and behind-the-meter storage budgets; while not a direct thermal technology competitor, it is the primary benchmark for storage economics.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks7 records
Key highlights7 records
Customer concentration
Antora Energy social profiles
Digital presenceAntora Energy financial estimates
Financial estimateRevenue estimate
Valuation estimate
Antora Energy leadership team
Management profileNumber of profiles
Profiles6 records
Antora Energy funding detail
Funding detailFunding overview
Funding rounds11 records
Investors30 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Antora Energy M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Antora Energy
What does Antora Energy do?
Antora Energy manufactures modular thermal battery systems that use solid carbon blocks to store energy as heat at up to 4,000°F. The systems charge from surplus clean electricity and then either dispatch electricity via proprietary thermophotovoltaic (TPV) cells or deliver high-temperature heat directly to industrial customers, enabling 24/7 clean heat and power.
Is Antora Energy a public or private company?
Antora Energy is a private company. It is classified as venture growth investor backed and is currently operating.
When was Antora Energy founded?
Antora Energy was founded in 2017. It employs 251 to 500 people.
Where is Antora Energy based?
Antora Energy is headquartered in San Jose, United States, in the North America region.
How does Antora Energy make money?
Two revenue lines are on record. Thermal Battery System Sales are the primary driver. The others are long-term Heat/Power Offtake Agreements.
Who are Antora Energy's main competitors?
Direct peers on record are Highview Power, Energy Vault, Rondo Energy, ESS Inc., Brenmiller Energy, 1414 Degrees and Form Energy. Emerging players are Malta Inc. and Electrified Thermal Solutions (Jupiter Ionics / Electric Heat). Tesla (Megapack / Energy) is listed as a broad incumbent.
Does Antora Energy have an API?
No public API is recorded for Antora Energy.
What industry is Antora Energy in?
Antora Energy's product category is Industrial Thermal Energy Storage. Its primary akta.pro industry code is EUAFADAC, Thermal LDES (High-Temperature, Molten Salt, Carnot/Heat-to-Power), with a secondary code of EUAFANAI, Industrial Process Heat TES (Steam, Kilns, Furnaces, Waste-Heat Coupling). Its NAICS code is 33241 and its SIC code is 4991.