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CSignum Secures £6M Investment to Expand Underwater Networking Technology

Networking

Business Honor
24 April, 2025

Funding fuels global growth of EMFS-powered networks for underwater data transmission.

CSignum, a Scotland-based networking company specializing in underwater wireless communication, has raised £6 million ($8 million) in a Series A funding round. The investment, led by Archangels, Par Equity, and Scottish Enterprise, marks a major step forward in the development and deployment of the company’s EM-2 product portfolio.

CSignum’s groundbreaking technology leverages patented electromagnetic field signalling (EMFS) to transmit data wirelessly through challenging environments such as water, ice, soil, and concrete. This innovation addresses one of the most persistent challenges in the networking industry: achieving reliable, real-time communication in environments where traditional wireless signals fail.

According to CSignum, the fresh capital will accelerate product development, support global expansion, and meet increasing demand for robust data transmission solutions in underwater and underground settings. Applications of the technology include water quality monitoring, under-ship systems, and critical infrastructure security, particularly for offshore wind turbines and oil and gas platforms.

“This investment reflects the growing recognition of the critical need for innovative communication solutions in the underwater IoT sector,” said Jonathan Reeves, CEO of CSignum. “The support from our investors will allow us to scale our operations, enhance our product offerings, and help industries worldwide manage their resources more effectively.”

In addition to hardware solutions, CSignum offers cloud-based dashboard and analytics tools through its CSignum Cloud, enabling clients to monitor and optimize systems remotely.

With a growing client base across the UK, EU, and US, CSignum is poised to play a key role in shaping the future of underwater networking. The company’s advancements are particularly timely as industries increasingly rely on IoT technologies to improve sustainability, safety, and operational efficiency in hard-to-reach environments.