NextGen Defense · Jul 2026
Describes APOLLO’s claimed 60,000-foot operation, 7,500-square-kilometer coverage, 5–10 ms latency, weeks-long endurance, and testing at several U.S. military ranges.
Company research
Public company, workplace, funding, and market signals
Updated Aug 2, 2026
Overview
Icarus (icarus.one), formerly associated with the One Kappa name, is a privately held aerospace/defense startup founded in 2023. It is developing persistent, solar-powered unmanned aircraft for stratospheric intelligence, surveillance and reconnaissance (ISR), communications relay, and data backhaul. Its stated thesis is that the stratosphere offers satellite-like persistence with lower latency, faster deployment, and lower cost. Public evidence is somewhat inconsistent on headcount and financing; the most reliable current signals indicate a rapidly scaling company of roughly 27–50 people and $500,000 of disclosed venture funding, plus non-dilutive Army/xTech/SBIR support. [Icarus official site] [YC] [DVIDS]
Primary product
APOLLO: a solar-powered, autonomous, high-altitude aircraft intended to operate above 60,000 feet for weeks at a time. Icarus markets it for persistent ISR, secure direct-to-device connectivity, communications relay, and data backhaul; the company claims deployment in hours, coverage of more than 1,000 square miles, and 5–10 ms latency. [Icarus official site]
Founded
2023
Headquarters
El Segundo, California, United States (the company describes its Los Angeles headquarters/factory as its engineering, manufacturing, and business center).
Team size
Approximately 27–50 employees; YC and a July 2026 Army/DVIDS report state 50, while company-directory and LinkedIn signals report approximately 20–30 or 27. The 50-person figure is the most recent explicit public claim located.
Work style
Onsite
Industry
Defense and Space Manufacturing
Sub-industry
High-altitude unmanned aircraft / stratospheric ISR and communications platforms
Offices
El Segundo/Los Angeles, California — headquarters, factory, engineering, manufacturing, and business operations
Mojave Desert, California — flight development and testing area
Business model
Defense procurement and government contracts
B2G platform sales and mission deployments
Potential platform-plus-payload/mission services
Non-dilutive government innovation programs and demonstrations
Funding
Stage
Seed / early-stage; YC Fall 2025
Total raised
$500K
Latest round
Seed / YC Fall 2025 · Sep 2025
Latest amount
$500K
Oct 2025 · U.S. Army xTech / Army FUZE
Sep 2025 · Y Combinator
Sep 2025 · Soma Capital and Xtal
May 2025 · U.S. Army xTech / Army FUZE
U.S. Army SBIR / Army FUZE
People & investors
Leadership
Founder & CEO
Head of Business; founding member
Head of Operations; previously Director of Strategy
Lead GNC Engineer
Founders
TOPGUN Instructor
Work & culture
Icarus presents itself as an 'elite sports team' of builders emphasizing customer obsession, extreme ownership, radical transparency, idea meritocracy, first-principles thinking, mission focus, and relentless iteration. Recruiting materials stress high engineering signal-to-noise, real hardware and flight testing, fast decisions, and substantial individual ownership. Employees are expected to work at the El Segundo factory five days per week. [Icarus careers]
Work style
Onsite
Visa sponsorship
Limited
Compensation
Public postings show approximately $100,000–$160,000 base salary for embedded/YC-track engineering roles and $120,000–$220,000 for senior full-stack engineering, plus equity and possible bonuses. Postings ask whether applicants require sponsorship and one YC listing says US citizen/visa only; no broad sponsorship commitment was found. [Icarus Greenhouse] [YC jobs]
Benefits
Meaningful equity
Top-market salary and bonuses
Health, dental, and vision insurance
Relocation support
Daily lunch
Dream desk setup
Custom Icarus Carhartt jacket mentioned in recruiting materials
Product & market
Pricing
Not publicly disclosed; the apparent model is enterprise/government procurement or contracting for aircraft, payload, deployments, and mission capability rather than a published self-serve price. Do not treat the frequently cited $100,000 figure as a confirmed customer price; it appears in founder/product messaging as an approximate unit-cost target.
Differentiators
- —Stratospheric operating altitude above 60,000 feet
- —Weeks-long solar endurance without landing or refueling
- —Lower claimed latency than LEO satellite links
- —Rapid deployment and persistent fixed-area coverage
- —Direct-to-device/high-throughput connectivity positioning
- —Upgradeable and reusable aircraft rather than a fixed-life satellite asset
- —Designed for low-cost, mass-producible defense deployment
- —Integrated design, manufacturing, assembly, and flight testing
Technology
Solar-powered high-altitude aircraft
Autonomous flight systems
Flight-critical embedded software
C/C++
RTOS or bare-metal firmware
SPI, I2C, UART, CAN, and Ethernet
Python, Go, or Rust backend systems
React and TypeScript frontend systems
Telemetry, command and control, data ingestion, and analytics
Avionics, GNC, RF, power electronics, energy storage, and communications systems
Customers
U.S. Army / Army FUZE and xTech programs
Multi-Domain Task Forces (MDTFs)
U.S. Army Special Operations Command (USASOC)
U.S. Army, Navy, and Special Operations Forces as reported users/stakeholders
Competitors
Skydweller Aero
Sceye
Bye Aerospace
Scale & contact
Latest news
U.S. Army DVIDS · Jul 2026
Reports that Icarus progressed from early prototypes to recurring Army experimentation, reached a claimed 50 employees, advanced APOLLO from TRL 3 to TRL 7, and received xTech prizes plus an Army SBIR Phase I contract.
The War Zone · Jul 2026
Covers Aerostar’s balloon-launched Apollo-R demonstrations and the potential for balloon motherships carrying multiple Icarus aircraft; it also references Army support and Valiant Shield 2026 testing.
Aerostar · Jul 2026
Announces an expanded Aerostar–Icarus partnership combining Aerostar balloon launch systems with APOLLO for persistent ISR, secure communications relay, and data backhaul; it says demonstrations generated interest from Army, Navy, and SOF stakeholders.
Henry Kwan / Substack · Oct 2025
Henry Kwan shared a public deck outlining Icarus’s long-term plan to ‘reclaim the Forgotten Frontier’ and dominate the stratosphere.
Jobs and careers at Icarus
20 jobs at Icarus
Network Engineer
On-site
IT
El Segundo; El Segundo, California, United States
1mo ago
On-site
Full-time
Senior Test Engineer
On-site
Engineering
El Segundo
1mo ago
On-site
Full-time
Supply Chain Lead
On-site
Manufacturing
El Segundo
1mo ago
On-site
Full-time
Manufacturing Engineer
On-site
Manufacturing
El Segundo
2mo ago
On-site
Full-time
Mechanical Engineer
On-site
Engineering
El Segundo
2mo ago
On-site
Full-time
Flight Operations Engineer
On-site
Deployments
El Segundo
2mo ago
On-site
Full-time
Senior Forward Deployed Engineer
On-site
Deployments
El Segundo
2mo ago
On-site
Full-time
Flight Test Engineer
On-site
Deployments
El Segundo
2mo ago
On-site
Full-time
Flight Operations Generalist
On-site
Deployments
El Segundo
2mo ago
On-site
Full-time
Flight Operations Crew Chief
On-site
Deployments
El Segundo
2mo ago
On-site
Full-time
Technician
On-site
Engineering
El Segundo
3mo ago
On-site
Full-time
Engineer (Formula SAE Track)
On-site
Engineering
El Segundo
3mo ago
On-site
Full-time
Senior RF Engineer
On-site
Engineering
El Segundo
7mo ago
On-site
Full-time
Senior Mechanical Engineer
On-site
Engineering
El Segundo
7mo ago
On-site
Full-time
Senior Manufacturing Engineer
On-site
Engineering
El Segundo
7mo ago
On-site
Full-time
Senior Full Stack Software Engineer
On-site
Engineering
El Segundo
7mo ago
On-site
Full-time
Senior Forward Deployed Engineer
On-site
Engineering
El Segundo
7mo ago
On-site
Full-time
Senior Embedded Software Engineer
On-site
Engineering
El Segundo
7mo ago
On-site
Full-time
Senior Electrical Engineer
On-site
Engineering
El Segundo
7mo ago
On-site
Full-time