Private company
Logo: Salamanderquay, CC BY-SA 4.0, via Wikimedia Commons3
UK business
CSL Group is a Critical IoT Connectivity company, providing fully managed single or multi-path solutions to connect any life, mission or business-critical IoT application. The company designs, delivers, and manages secure, multi-bearer IoT connectivity solutions at scale, integrating devices, networks, and monitoring platforms. Its services include mobile, broadband, and satellite connectivity, along with signal monitoring and analysis tools such as the CSL Signal Analyser and the company’s patented rSIM® technology.2 Wikipedia text CC BY-SA 4.0
Last updated Oct 21, 2026.
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CSL Group is a Critical IoT Connectivity company, providing fully managed single or multi-path solutions to connect any life, mission or business-critical IoT application.2
CSL was founded in 1996 by Simon Banks and Chris Brooks as a UK-based alarm signalling company. From 2005 to 2016, Phil Hollett led operations and oversaw private equity investment from Octopus and later Bowmark Capital.
In 2015, Ed Heale joined the company, changing the company strategy and steering its transformation into a global provider of managed IoT connectivity services.
From Wikipedia’s article on CSL Group Ltd, shared under CC BY-SA 4.0.4
Listed on Wikidata.1
CSL operates from 11 international offices, with its headquarters in northwest London. Additional offices are located in Greater Manchester, Newbury, Ireland, the Netherlands, Sweden, Spain, the United States, and Southeast Asia. Its logistics and warehouse operations are based in Wales.
As of 2024, CSL employed around 250 staff globally.
From Wikipedia’s article on CSL Group Ltd, shared under CC BY-SA 4.0.4
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