Stratospheric Internet: Solar Airships and Drones Challenge Starlink

High above the atmosphere, quiet solar airships and autonomous drones are beginning to compete with satellites for something valuable: connectivity.

While billions of people remain unconnected, a new generation of platforms flying in the stratosphere promises to transform global internet access and challenge the dominance of satellite megaconstellations such as Starlink.

A quarter of humanity remains offline

Even with thousands of satellites already operating in low Earth orbit, the ambition of internet access for everyone remains a long way off. Recent figures from the UN-affiliated International Telecommunication Union (ITU) indicate that almost one quarter of the world’s population still has no access to the internet, or relies on unreliable, expensive and unstable connections.

The issue is particularly acute in rural areas, mountainous regions, deserts, forests and islands, where neither fibre-optic infrastructure nor conventional mobile networks justify the investment. The economics simply do not work for operators, leaving entire communities outside the digital economy.

Stratospheric internet is emerging as a third route: neither cable on the ground nor satellite in space, but antennas floating above the clouds.

This approach aims to tackle three barriers at once: the high cost of satellite coverage, bandwidth constraints when many users connect to the same beam, and end-user prices that remain unaffordable for millions of households in developing countries.

How stratospheric internet works

The technology relies on HAPS platforms, short for High Altitude Platform Station. In effect, these are airborne telecommunications towers positioned between 18 and 25 kilometres above the ground, in the stratosphere and well above commercial aircraft routes.

These platforms can take several forms:

• helium-filled airships covered in solar panels
• high-altitude balloons carrying communications systems
• long-winged solar drones capable of autonomous flight for weeks
• unmanned aircraft powered by hydrogen or advanced batteries

Unlike satellites orbiting at roughly 500 kilometres or more above Earth, a HAPS operates far nearer to the ground. This lowers latency: the time needed for data to travel between a user and the network. Reduced delay is important for video calls, online gaming, remote surgery and time-sensitive industrial applications.

Because they operate like vast antennas suspended over the same area for extended periods, these platforms can provide high-capacity signals across hundreds of thousands of square kilometres. They can also adjust bandwidth allocation for denser areas or periods of peak demand.

Solar power, lengthy flights and limited maintenance

Most projects currently being trialled use solar panels and high-density batteries. Sunlight is plentiful in the stratosphere, with no nearby clouds, supporting power generation throughout the day. At night, the systems run on stored energy.

The aim is straightforward: keep the platforms airborne for weeks or even months without frequent landings, sharply reducing operating costs compared with satellites, which require costly rocket launches and hardware designed to withstand the space environment.

By bringing infrastructure closer to the surface, stratospheric internet combines the scale of satellites with the flexibility of a mobile phone mast.

Starlink, OneWeb… and the new battle in the skies

Using aircraft and balloons to provide connectivity is not entirely new. Projects such as Alphabet’s Loon, owned by Google, operated commercially in several Latin American and African countries. The initiative ended in 2021 because of technical and financial difficulties.

Keeping a balloon positioned over the same region, coping with strong winds, controlling ascent and descent routes, and organising equipment recovery all proved costly and complex. At the same time, low-Earth-orbit satellite constellations expanded rapidly, pushing the market towards space-based services.

The new generation of stratospheric projects

In recent years, three initiatives have increasingly drawn the attention of regulators and operators around the world:

Company	Platform type	Distinguishing feature
Sceye (USA)	Solar helium airship	Focus on positional stability and continuous coverage
Aalto HAPS (an Airbus subsidiary)	Zephyr solar drone	Record for stationary flight of up to 67 days
World Mobile (United Kingdom)	Hydrogen-powered drone	Bandwidth of up to 200 Mbps at a very low cost per user

World Mobile, for instance, estimates that just nine stratospheric platforms would be enough to deliver high-speed internet to Scotland’s 5.5 million residents. The projected cost is around 80 cents per person each month, contrasting with an individual Starlink subscription priced at tens of pounds sterling.

These figures are projections, but they help illustrate the technology’s priority: reaching places first where satellite and terrestrial networks still do not make economic sense.

Stratospheric internet vs satellites: competitor or ally?

This is not strictly an “either-or” contest. Specialists regard stratospheric internet as more of a complement than a replacement for systems such as Starlink and OneWeb.

The three layers - terrestrial, stratospheric and space-based - are likely to work together:

• fibre and 4G/5G networks serving cities and economic corridors
• HAPS platforms filling gaps in rural and isolated regions
• satellites ensuring global coverage and connectivity at sea or in extremely remote locations

The challenge lies in technical and regulatory integration. Stratospheric platforms use the same frequency spectrum as mobile networks and satellites. Sharing these bands requires clear rules to prevent interference and service outages.

Without coordination of spectrum and traffic routes, the promise of universal connectivity risks becoming an airborne signal traffic jam.

Regulation, safety and risks

Taking antennas into the stratosphere affects several sectors at once: aviation, defence, telecommunications and data protection. National agencies will need to establish how these aircraft are certified, how their flights are monitored, and who is liable in the event of faults or accidents.

There are also surveillance concerns. A platform able to observe vast areas of territory could, in theory, carry high-resolution cameras and sensors. In countries with limited transparency, this could be used to monitor populations rather than solely to provide internet access.

What changes for users and poorer countries

If these plans materialise over the coming years, stratospheric internet could become the main digital gateway for millions of people who currently rely on community telecentres or a single Wi-Fi point in small villages.

For governments and operators, the most frequently cited uses include:

• connecting rural schools without building kilometres of fibre
• near-real-time monitoring of wildfires and deforestation in remote areas
• telemedicine for isolated communities using high-definition video
• support for emergency operations after floods, earthquakes or hurricanes
• temporary internet provision for major events, concerts or festivals in remote locations

For end users, the experience is expected to resemble that of a mobile network or fixed wireless connection: a router or smartphone connects to a local antenna, which then communicates with the stratospheric platform. The difference will be in infrastructure costs and the speed of deployment in regions previously overlooked by the market.

Concepts that help explain this shift

Several technical terms recur in this debate and deserve attention. Latency, for example, is often confused with speed. A connection with many megabits per second does not necessarily respond quickly. If the signal must travel a huge distance to the server, the delay can be disruptive even with good data throughput.

Another important concept is bandwidth, or available capacity. It indicates how much information can pass through a channel at the same time. In densely populated areas, a single satellite beam may have to serve thousands of users, reducing the share of bandwidth available to each person. As they are closer and can concentrate on specific locations, stratospheric platforms tend to ease this pressure.

Possible scenarios for the coming years

One plausible scenario involves countries creating national “connected sky” programmes, combining tax incentives, spectrum auctions and social coverage targets. In areas such as the Amazon, the African Sahel or mountainous parts of Asia, stratospheric airships and drones could become the main telecommunications infrastructure.

Another possibility is that major technology companies enter as partners to local operators, financing some of the platforms in return for ensuring stable access to their digital services in markets that are currently almost unexplored. This could accelerate digital inclusion, but it could also concentrate power in the hands of a small number of corporations, affecting data sovereignty and economic regulation.