Altaeros Energies

What Altaeros Energies does

Altaeros Energies is a 2010 MIT spinout headquartered in Somerville, Massachusetts, that designs and manufactures autonomous tethered aerostats—lighter-than-air helium-filled aerial platforms connected to the ground via a proprietary three-tether architecture—for government defense and commercial connectivity customers. The company's core technology is the Aerostat Autopilot, a proprietary autonomous control system with three layers (Automated Dispatch Control, AI Flight Director, and Actuator Control) that enables fully crewless launch, recovery, and flight management, eliminating the 4-10 trained personnel historically required for 24/7 manned aerostat operations and reducing operational costs by up to 70%. The product line spans the ST-Flex and ST-Flex+ (portable commercial/tactical platforms carrying 132-200 lbs to 1,000 ft AGL), the ST-Flex Guardian Class (military-grade variant with GPS hardening, ATTLA certification, and enhanced encryption), the newly launched ST-400 (carrying 900+ lbs to 2,500+ ft AGL for long-duration multi-mission applications), and the legacy ST-200 SuperTower, all featuring a modular payload bay supporting interchangeable LTE/5G radios, ISR sensors, radar, EO/IR cameras, MANET communications, and secure edge computing.

The business model combines one-time hardware sales with multi-year managed service contracts, custom payload integration, and bespoke aerostat development, with quote-based enterprise pricing and no public disclosure. The customer base is anchored by a 5-year, $99 million ID/IQ contract with DHS/CBP for border security aerostats (awarded October 2023, renewed for year two in October 2025), supplemented by defense customers including the DoD, US Army 2nd Multi-Domain Task Force, and Indiana National Guard, alongside commercial telecom partnerships with SoftBank (Japan), World Mobile (Africa), and Ericsson (4G/5G radios), plus industrial customers in mining and event connectivity. The company operates from a US R&D and manufacturing facility in Fremont, New Hampshire, and a UK manufacturing subsidiary (Altaeros UK Ltd.) in Wrexham, Wales, established in December 2024. Investors include SoftBank Group (lead), Safar Partners, SKK, SPARX, IQT, Mitsubishi Heavy Industries, and Suhail Bahwan Group, with total disclosed funding of approximately $50 million across multiple rounds.

Name

Altaeros Energies

Legal name

Altaeros Energies, Inc.

Website

https://altaeros.com

Company type

Private

Founded year

2010

Operating status

Operating

Headcount range

1–10 employees

Short description

Altaeros Energies develops autonomous tethered aerostats for government defense and commercial connectivity applications, anchored by its proprietary Aerostat Autopilot control system and a $99M DHS/CBP contract supporting border security and rural telecommunications deployments.

Ownership category

akta.pro rank

Product category

Autonomous Aerostat / Aerial Surveillance and Communications Platforms

NAICS

Aircraft Manufacturing (336411)

SIC

Aircraft Parts & Auxiliary Equipment, Nec (3728)

akta.pro primary industry

VTOL & Hybrid UAV Platforms (IMABAIAC)

akta.pro secondary industry

Flight Control Computers & Autopilot Systems (IMABAFAA)

Keywords

• Autonomous tethered aerostats
• Aerial communications platforms
• ISR surveillance systems
• Rural connectivity infrastructure
• Border security platforms

Headquarters

HQ city

Boston

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Aerostat Hardware Sales: Sale of autonomous aerostat platforms including ST-Flex, ST-Flex Guardian Class, and ST-400 models. Customers include government agencies and commercial enterprises who purchase the aerostat systems outright.
2. Government Service Contracts: Ongoing support, service, and sparing contracts for government aerostat deployments, including the DHS/CBP ID/IQ contract for border security operations. Includes field support, maintenance, and operational services.
3. Payload Integration Services: Custom payload specification and turnkey solutions where Altaeros team works with customers on integrated aerostat and payload solutions tailored to specific mission requirements.
4. Custom Aerostat Development: Customized autonomous aerostat platform development for applications requiring unique or specific features, leveraging cutting-edge autonomous aerostat technology to meet exact customer requirements.

Pricing tiers

Go-to-market motion3 records

Distribution channels3 records

Marketing channels6 records

Core offering

Altaeros designs, manufactures, and sells autonomous tethered aerostats (lighter-than-air aerial platforms) for government and commercial customers, with the Aerostat Autopilot proprietary control system enabling fully crewless launch, recovery, and flight operations. Product lines include the ST-Flex/ST-Flex+ (commercial and tactical), ST-Flex Guardian Class (military/government), ST-400 (large heavy-payload platform), and the legacy ST-200 SuperTower, plus payload integration, field support, and custom aerostat development services.

Product overview

Altaeros Energies is a technology company that designs, manufactures, and operates autonomous aerostats (lighter-than-air tethered aerial platforms) for commercial and government customers. The product portfolio is anchored by the proprietary Aerostat Autopilot autonomous control system, which enables fully crewless launch, recovery, and flight operations across the entire aerostat lineup. The current product family comprises the ST-Flex (portable tactical aerostat for commercial and government use, with a Guardian Class military variant), the ST-400 (larger platform carrying 900+ lbs to 2,500+ ft AGL for multi-mission government applications), and the legacy ST-200 SuperTower (original commercial aerial cell tower). Altaeros differentiates through a modular payload bay architecture that supports interchangeable payloads including LTE/5G radios, ISR sensors, radar (IMSAR), EO/IR cameras (L3Harris WESCAM, Trillium), MANET communications radios (Silvus), and secure edge computing (CenCore), allowing a single platform to serve roles ranging from rural connectivity and disaster response to border security and military ISR. The company also operates Altaeros UK Ltd. for aerostat manufacturing and rugged inflatable structure production.

Differentiator

Problem solved

Functional benefit

Brands

• Aerostat Autopilot: Proprietary autonomous control system for tethered aerostats that eliminates the need for a traditional ground crew to perform day-to-day operations including launch, landing, and flight management.
• SuperTower

Products and services

• ST-Flex Autonomous Aerostat Portable, rapidly deployable autonomous aerostat providing up to 25 mi (40 km) coverage radius; carries up to 132 lbs (60 kg) of modular payload to 1,000 ft AGL for weeks at a time; towable on-road/off-road and set up in less than a day; targets mobile networks, disaster response, mining/industrial IoT, and aerial advertising.
• ST-Flex Guardian Class Autonomous Aerostat Military-grade variant of the ST-Flex with GPS hardening, ATTLA certification, enhanced encryption, and government-specific features; supports ISR, radar, EO/IR, SIGINT, cUAS, MANET radios, communications relay, and 4G/5G payloads for border security, military operations, port security, and emergency response missions.
• ST-400 Autonomous Aerostat Large autonomous aerostat carrying over 900 lbs (408 kg) of mission-critical payloads to altitudes exceeding 2,500 ft AGL; enhanced rugged design for long-duration deployments in challenging environments; quick-connect rail system for fast payload integration; built-in Aerostat Autopilot for fully autonomous operations.
• Aerostat Autopilot Autonomous Control System Proprietary autonomous control system for tethered aerostats that automates launch, recovery, and day-to-day flight operations through intelligent decision-making, real-time closed-loop control, and actuator management — included as a standard capability on all Altaeros aerostats.
• Payload Integration & Turnkey Solutions Custom payload integration service in which Altaeros' engineering team works with customers on bespoke payload specifications or delivers turnkey aerostat-plus-payload solutions leveraging modular payload bays (LTE, 5G, IoT, radar, EO/IR, MANET radios).
• Aerostat Field Support and Service Customizable field support, maintenance, and sparing service plans for all Altaeros aerostats, tailored to specific mission needs and objectives.
• Custom Aerostat Development Bespoke aerostat design and manufacturing service for applications requiring unique or specific features; Altaeros' design and manufacturing teams create customized autonomous aerostat platforms built on the company's autonomous aerostat technology.
• Rugged Inflatable Structures (hangars, shelters, custom inflatables) Manufactured by Altaeros UK Ltd. — rugged inflatable structures including hangars, shelters, and custom inflatables for agriculture, automotive, healthcare, construction, manufacturing, and military applications, produced alongside Altaeros aerostats at the Wrexham facility.

Quantifiable outcome

• Up to 95% uptime in government deployments with no daily on-site crew needed
• +5 more outcomes

Named customers6 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration5 records

AI capability5 records

Feature5 records

Partnerships

Nine partnerships are on record, tiered minor, flagship, core and supporting.

• Let's Go RacingminorGTM or Marketing Partner · 6 March 2025Motorsport marketing partnership to enhance team operations, brand engagement, and fan connectivity in motorsport through aerial advertising and connectivity solutions.
• SoftBank Corp.flagshipStrategic or Co-development Partner · 22 June 2022Strategic partnership to launch world's first autonomous aerostat. SoftBank completed initial testing of Altaeros' ST-Flex at Hokkaido Spaceport, Japan in June 2022. SoftBank provides base station systems with proprietary cylindrical antenna technology for aerial telecommunications trials.
• World MobileflagshipStrategic or Co-development Partner · 28 December 2021Partnership to deploy aerostats in Africa to connect unconnected populations. Two or three aerostats launched in Zanzibar anchoring World Mobile's Dynamic Network, with plans to deploy thousands across the continent to serve hundreds of millions of subscribers.
• EricssoncoreTechnology or Integration · 12 February 2019Radio technology partnership. Ericsson provides 4G LTE radios and 5G-ready high-performance radio systems with MIMO capability for SuperTower aerial cell tower applications. Partnership enables rural connectivity deployments using innovative aerial infrastructure.
• IMSARcoreTechnology or IntegrationRadar provider partnership. IMSAR designs, builds, and supports security and intelligence products including Synthetic Aperture Radar (SAR) technology. IMSAR radar integrated onboard Altaeros ST-Flex autonomous aerostats provides unrivaled mission availability in all weather, day or night in ground and maritime environments.
• L3Harris TechnologiescoreTechnology or IntegrationEO/IR Camera Provider partnership. L3Harris WESCAM MX-Series multi-sensor electro-optical and infrared surveillance systems integrated with ST-Flex provide customers with high-performance gimbal capabilities deployable at 1,000ft AGL for persistent aerial surveillance and reconnaissance missions.
• Silvus TechnologiescoreTechnology or IntegrationRadio Communications Provider partnership. Silvus StreamCaster MANET radios powered by proprietary MN-MIMO waveform provide high-fidelity video, voice and data communications. Mounted on ST-Flex at 1,000ft AGL, delivers ultra-wide-area tactical MANET communications capable of permeating dense terrain.
• Trillium EngineeringcoreTechnology or IntegrationVision systems provider partnership. Trillium HD80 and HD95 EO/IR sensors deployed on ST-Flex at 1,000ft provide customers with real-time, actionable imagery data for ISR missions.
• CenCoresupportingTechnology or IntegrationSecure Computing at the Edge partnership. CenCore Containerized Secure Unit (CSU) is an open-platform C4 solution integrated directly with Altaeros aerostats for secure processing at the tactical edge supporting CJADC2 and Kill Web operations.

Scale indicators10 records

Recent moves8 records

Expansion highlights7 records

Direct peers

• TCOM: TCOM is the established U.S. manufacturer of tethered aerostats for military, border, and homeland-security missions — directly competing with Altaeros on payload, altitude, and persistence in the same DHS/DoD customer set.
• Raven Aerostar: Raven Aerostar designs and manufactures stratospheric aerostats and integrated ISR payloads for defense and commercial markets, competing head-to-head with Altaeros in tethered aerostat platforms.
• Israel Aerospace Industries (IAI): IAI produces the EL/M-2080 and other tethered aerostat radar/surveillance systems for border and air-defense applications, competing with Altaeros in defense ISR aerostats.

Emerging players

• AeroVironment: AeroVironment designs and manufactures small tactical unmanned aircraft systems for DoD, competing for similar autonomous-aerial ISR and force-protection budgets with a different (small UAS) platform approach.
• Skydio: Skydio manufactures autonomous small UAS for defense, public safety, and inspection — adjacent in autonomous aerial platforms and competing for similar DoD/autonomous-system budgets.
• Saildrone: Saildrone builds autonomous uncrewed surface vessels for persistent maritime ISR — adjacent in autonomous persistent-surveillance business model and competing for similar DoD autonomous-sensor budgets.
• Anduril Industries: Anduril is an autonomous-defense technology company competing for similar DoD ISR and cUAS budgets with a different platform (drones/loitering munitions), but addresses overlapping autonomous-persistent-surveillance missions.

Broad incumbents

• Lockheed Martin: Lockheed Martin operates the Tethered Aerostat Radar System (TARS) program and other persistent-ISR airborne platforms, holding incumbent program-of-record positions that Altaeros must displace.
• Elbit Systems: Elbit Systems offers aerostat-based persistent surveillance and EW platforms within a broader defense-electronics portfolio, serving the same DHS/DoD customer set as Altaeros.
• Textron Systems: Textron Systems develops and supports unmanned aircraft systems and aerosurface solutions for defense customers, competing for overlapping DoD autonomous-aerial procurement dollars.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/altaerosinc
• YouTubeyoutube.com/c/altaeros
• Facebookfacebook.com/altaeros
• LinkedInlinkedin.com/company/altaeros

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles16 records

Subsidiaries1 record

Funding overview

Funding rounds9 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 Altaeros Energies