Zenith Aerospace
Palo Alto, US · Founded 2016 · Delaware corporation · 1 known investors
Zenith develops stratospheric aircraft, telecommunications, resilient systems, and autonomy technologies to deliver aerial networks aimed at closing the digital divide. The company operates a vertically integrated manufacturing facility for rapid prototyping and testing of its aircraft and telecom systems.
Also known as Zenith
Founders & leadership
Board
Investors · 1
Reported raises · per SEC filings
Form D private placements$11.6M disclosed across 6 rounds · 2018–2024
▶$250KraisedApr 2024 · 3 investors · Other TechnologyRule 506(b)
- John FrankelDirector
- Yitao ZhuangExecutive Officer, Director
- Raphael NardariExecutive Officer, Director
- Vijay UllalDirector
- Offering amount
- $1M
- Amount sold
- $250K
- Minimum investment
- $1.9K
- First sale
- Apr 2024
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
▶$3MraisedDec 2022 · 2 investors · Other TechnologyRule 506(b)
- John FrankelDirector
- Vijay UllalDirector
- Yitao ZhuangExecutive Officer, Director
- Raphael NardariExecutive Officer, Director
- Offering amount
- $3M
- Amount sold
- $3M
- Minimum investment
- $500K
- First sale
- Dec 2022
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
▶$5.8MraisedJul 2021 · 9 investors · Other TechnologyRule 506(b)
- Raphael NardariExecutive Officer, Director
- John FrankelDirector
- Vijay UllalDirector
- Yitao ZhuangExecutive Officer, Director
- Offering amount
- $5.8M
- Amount sold
- $5.8M
- Minimum investment
- $15K
- First sale
- Jul 2021
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
▶$6raisedJul 2021 · 1 investors · Other TechnologyRule 506(b)
- Raphael NardariExecutive Officer, Director
- Vijay UllalDirector
- Yitao ZhuangExecutive Officer, Director
- John FrankelDirector
- Offering amount
- $6
- Amount sold
- $6
- Minimum investment
- $6
- First sale
- Dec 2020
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
▶$650KraisedMay 2020 · 3 investors · Other TechnologyRule 506(b)
- Yitao ZhuangExecutive Officer, Director
- John FrankelDirector
- Vijay UllalDirector
- Raphael NardariExecutive Officer, Director
- Offering amount
- $1M
- Amount sold
- $650K
- Minimum investment
- $10K
- First sale
- May 2020
- Incorporated
- Corporation, Delaware, 2016
- Federal exemptions
- 06b
▶$1.9MraisedNov 2018 · 9 investors · Other TechnologyRule 506(b)
- Vijay UllalDirector
- Raphael NardariExecutive Officer, Director
- John FrankelDirector
- Yitao ZhuangExecutive Officer, Director
- Offering amount
- $1.9M
- Amount sold
- $1.9M
- Minimum investment
- $25K
- First sale
- Oct 2018
- Incorporated
- Corporation, Delaware, 2016
- Federal exemptions
- 06b
Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.
Company profile
researched Aug 2026Zenith Aerospace develops high-altitude, long-endurance aircraft and airborne telecommunications equipment intended to provide internet access from the stratosphere without new ground infrastructure. The company frames its objective as closing the digital divide for 3.5 billion people, and cites use cases including connecting remote populations, extending networks where terrestrial build-out is impractical, and restoring communications after natural disasters.
The product line comprises three elements. Pegasus is an autonomous fixed-wing aircraft with a hybrid propulsion system, specified for up to 8 days of endurance, 13,000 miles of range, 70,000 ft altitude and 146 kt speed, with conventional takeoff and landing in 350 ft, storage and transport in a 40 ft container, and payload bays in the nose cone, tail cone and fuselage offering 165 lbm capacity, 5 kW of continuous power and 70 cu ft of volume. Mercury is an internally engineered wireless backhaul system using pointing-and-tracking software with a precision gimbal to form air-to-air and air-to-ground links at up to 500 mi range, 40 Gbps bandwidth, 40 ns latency plus time of flight, and better than 0.1 degree pointing accuracy in E-band. Hermes is an aerial 5G active phased array antenna operating at mid-band 5G frequencies with time division duplex, frequency reuse 1 and bandwidth up to 100 Mbps, designed to connect directly to user devices while avoiding interference with terrestrial cell towers.
Alongside civil connectivity, Zenith markets defense applications: a persistent stratospheric communications layer positioned as an alternative to undersea cables and satellite systems, with aircraft spaced 250 to 500 miles apart and air-to-air links spanning up to 3,800 miles across locations such as San Diego, Hawaii, Guam and Taiwan. Substituting sensor payloads for communications equipment supports persistent surveillance covering approximately 49,000 square miles with a 125-mile horizon.
Business model
Zenith positions itself as a builder and operator of aerial telecommunications networks, addressing investors, telecom providers and defense agencies as its principal counterparties. Its products are the Pegasus aircraft platform and the Mercury backhaul and Hermes 5G payloads, which can be reconfigured with sensor payloads for surveillance missions.
▸Full profile — market position, technology, go-to-market, geography
Market position
Zenith contrasts its approach with LEO satellite communications, which it characterises as requiring large, expensive, monolithic constellations that are too distant to deliver high-bandwidth, low-latency service directly to mobile devices, and with solar-powered high-altitude aircraft constrained to low latitudes. The company references Boeing's Condor, which demonstrated autonomous multi-day stratospheric flight with piston engines in the late 1980s, and Angel Technologies' airborne telecommunications demonstration from the Proteus aircraft in the late 1990s, as precedents for its combination of propulsion, manufacturing and flight software.
Hybrid rather than solar propulsion for global, all-latitude operation; conventional takeoff and landing with general-aviation-style operations and maintenance; multi-day endurance at 70,000 ft; and internally engineered telecom payloads combining long-range E-band backhaul with a direct-to-device 5G phased array.
Technology
The company advances stratospheric aircraft, telecommunications, resilient systems and autonomy technologies. Pegasus uses hybrid propulsion rather than solar power, which the company argues avoids the roughly plus or minus 35 degree latitude operating limit of solar aircraft and allows flight at all latitudes; it is fully autonomous from startup to shutdown with human oversight as necessary and is built to meet FAA and ASTM standards. Mercury provides high-bandwidth, low-latency line-of-sight E-band links, and Hermes is an active phased array 5G antenna. Zenith argues that operating at roughly 20 km altitude yields about 250 microseconds of signal latency versus about 20 ms for LEO satellites at 500 km.
Go-to-market
The company's site solicits direct contact from investors and telecom providers and maintains separate positioning for aerial telecom and defense solutions.
Telecommunications providers seeking coverage without new ground infrastructure, operators serving unconnected or remote populations and disaster-response scenarios, and defense agencies requiring resilient communications, connected-battlespace data links and persistent surveillance.
Geography
Operations are based at 215 O'Neill Avenue, Belmont, California, where the facility houses engineering offices and machine, composite, wood and electrical shops supporting vertically integrated manufacturing, rapid prototyping and testing. The company states its aircraft is designed for operation anywhere in the world and at all latitudes.
Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Non-dilutive funding · 6 SBIR/STTR awards
Federal grants — no equity taken| Agency | Phase | Year | Amount |
|---|---|---|---|
| U.S. Air ForceAir Force | Phase I | 2023 | $74.9K |
| U.S. Air ForceAir Force | Phase I | 2020 | $49.5K |
| U.S. Air ForceAir Force | Phase ISTTR | 2020 | $24.9K |
| U.S. Air ForceAir Force | Phase I | 2019 | $49.9K |
| U.S. Air ForceAir Force | Phase I | 2019 | $49.8K |
| U.S. Air ForceAir Force | Phase I | 2018 | $49.3K |
Source: SBIR.gov award data (U.S. Small Business Administration). SBIR/STTR awards are competitive federal R&D grants and contracts — non-dilutive capital alongside any venture rounds above.
Legal entities · 1
corporate structure▸Research sources · 8
primary sources listed
- Zenith Aerospacezenithaero.com · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Zenith Aerospace do?
- Zenith Aerospace builds stratospheric aircraft and airborne telecom payloads to deliver internet and defense connectivity from the sky.
- Who are Zenith Aerospace's investors?
- Zenith Aerospace's investors include Ff Venture Capital.
- How much funding has Zenith Aerospace raised?
- Zenith Aerospace has disclosed $11.6M raised across 6 rounds.
- Where is Zenith Aerospace headquartered?
- Zenith Aerospace is headquartered in Palo Alto, US.