The future of IoT connectivity is increasingly hybrid, combining the strengths of both cellular and satellite networks. Cellular connectivity offers low latency, high bandwidth, energy efficiency, and cost-effective operation in areas with strong terrestrial coverage, making it ideal for urban and large-scale deployments. Satellite connectivity provides reliable coverage in remote, offshore, and underserved locations where cellular networks are unavailable or unreliable. Hybrid solutions allow devices to switch between networks, ensuring continuous connectivity and greater resilience. This approach is particularly valuable for critical applications, high-value assets, and global operations, while advances in satellite-terrestrial integration are making hybrid IoT deployments increasingly practical and cost-effective.
Choosing the right connectivity solution for an IoT deployment depends greatly on three key factors: where devices are deployed, the performance they require, and commercial considerations. In many cases, organisations must decide between cellular, satellite, or a hybrid combination of both.
Location is often the most important factor. In urban and suburban areas, cellular networks are usually the preferred option due to their extensive coverage, mature infrastructure, and cost efficiency. While satellite connectivity can also operate in these environments, it rarely provides significant additional value.
The picture changes in remote and off-grid locations, where cellular coverage may be unavailable or unreliable. Here, satellite connectivity excels, providing broad geographic coverage without the need for terrestrial infrastructure. Hybrid solutions can also perform well in these environments, although the satellite component typically delivers much of the value.
For mobile assets moving between connected and remote areas, hybrid connectivity often offers the best experience. Devices can dynamically switch between cellular and satellite networks, maintaining connectivity wherever they travel. Similarly, satellite can simplify multi-country deployments by providing consistent coverage across borders, avoiding the complexity of coordinating multiple cellular operators and varying support for IoT technologies such as NB-IoT and LTE-M.
Sparse asset deployments, such as those found in agriculture, mining, and environmental monitoring, also favour satellite connectivity because devices may be spread across vast geographical areas. Conversely, indoor applications generally favour cellular connectivity, as satellite signals often struggle to penetrate buildings.
Performance needs also influence connectivity decisions. For basic two-way communications, cellular, satellite, and hybrid approaches can all be effective. However, applications requiring high data volumes, such as video transmission, image uploads, or large software updates, are generally better suited to cellular or fixed-line networks.
Latency is another important consideration. Cellular networks typically provide the lowest latency and are therefore preferred for applications requiring real-time interaction. While modern Low Earth Orbit (LEO) satellite constellations have significantly improved latency performance, cellular retains an advantage for particularly time-sensitive use cases. Hybrid solutions can clearly achieve similar latency performance as cellular.
Commercial factors frequently determine the final connectivity choice. Cellular and satellite solutions can both support high-value assets and mission-critical applications, but hybrid systems offer additional resilience by providing multiple communication paths. This can be particularly valuable during network outages or natural disasters.
Cellular networks also have an advantage in scalability and can support millions of devices at relatively low cost, making them ideal for large-scale deployments such as smart metering. Satellite solutions are generally more expensive and face greater size and power constraints. Hybrid deployments are typically the most costly, but their added resilience and flexibility can justify the investment for critical applications.
Ultimately, the optimal connectivity strategy depends on balancing coverage, performance, resilience, and cost against the specific requirements of an IoT deployment.
Satellite should be considered when devices operate beyond cellular coverage, move across countries, track high-value assets, or require critical uptime. Satellite also supports resilience by providing an independent communication path during disasters, infrastructure failures, or network outages. The future will be characterised by hybrid models combining cellular and satellite for coverage, resilience, and performance across diverse contexts. As integration improves, the challenge shifts from choosing between satellite and cellular connectivity options to combining them for optimal IoT connectivity while managing cost and complexity.
To find out more, please check out our recent report Combining Satellite and Cellular Technologies for IoT: A Playbook.
