CSL Group

What CSL Group does

CSL Group (trading as CSL DualCom Ltd) is a privately held UK telecommunications firm headquartered in Croxley, Watford, with operations across the UK, Netherlands, Germany, Sweden, Spain and the United States. Founded in 1996 and employing approximately 240 staff, the company supplies secure IoT connectivity solutions for organizations operating in regulated, high-stakes environments — specifically fire & security, healthcare & telecare, public sector, utilities, critical national infrastructure, industrial, transport & logistics, and retail & hospitality.

Name

CSL Group

Legal name

CSL DualCom Ltd

Website

https://csl-group.com

Company type

Private

Founded year

1992

Operating status

Operating

Headcount range

101–250 employees

Short description

CSL Group is a UK-based, privately held IoT connectivity provider delivering secure, multi-network SIM and management services to regulated enterprises in fire & security, telecare, utilities, public sector, and critical infrastructure across Europe and North America.

Ownership category

akta.pro rank

Product category

IoT Connectivity / Critical Telecommunications

NAICS

Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (5182)

SIC

Telephone Communications (No Radiotelephone) (4813)

akta.pro primary industry

Cloud Security Posture Management (CSPM) (HDADADAB)

akta.pro secondary industry

Cloud Security Posture Management (CSPM) (HDABAHAA)

Keywords

• Critical IoT connectivity
• Resilient SIM services
• Alarm signalling solutions
• Telecare connectivity
• Managed IoT networking

Headquarters

HQ city

Watford

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Technology or R&D, Personnel, Operations, Infrastructure, Marketing or Sales

Revenue model

1. IoT Connectivity Services: Managed connectivity services delivered as a continuous service with monitoring and support. Revenue is generated through connectivity subscriptions, usage-based components, and hardware (IoT SIMs, routers) sales bundled with managed services.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels7 records

Core offering

CSL Group provides secure, resilient IoT connectivity solutions for regulated and critical environments, supplying IoT SIM cards, the patented rSIM resilient SIM, IoT routers, alarm signalling, satellite and broadband connectivity, and accompanying connectivity management platforms. The portfolio is delivered as managed services with 24/7 monitoring, private APNs, and multi-network resilience for fire & security, healthcare/telecare, utilities, public sector, and critical national infrastructure customers.

Product overview

CSL Group provides a comprehensive IoT connectivity portfolio designed for critical and regulated environments. The offering comprises hardware products (IoT SIM cards, rSIM resilient SIM, IoT Routers, VoiceLink, CSL Satellite, CSL Broadband, CSL Signal Analyser 2, CSL Outpost, and Alarm Signalling) complemented by a suite of connectivity management platforms (My Base App 2.0, CSL Live, IoT.Live, CSL IoT Platform, and CSL SIM Insight). The core portfolio centers on the rSIM technology for autonomous network switching and multi-network connectivity solutions across Life Critical, Mission Critical, Business Critical, and Geo-Critical solution categories.

Differentiator

Problem solved

Functional benefit

Products and services

• IoT SIM IoT SIM cards providing secure, multi-network connectivity for IoT devices across regulated environments, including fire alarms, security systems, telecare, utilities, and critical national infrastructure.
• rSIM (Resilient SIM) The world's first truly resilient and intelligent SIM card; uses patented technology to actively and autonomously switch profiles between two different roaming core networks if connection is lost, maximising uptime for critical operations.
• IoT Router Secure IoT routers that protect networks and ensure only authorised devices can connect, featuring firewall protection, access tracking, and VPN functionality for regulated environments.
• CSL Outpost Solution designed to keep distributed estates connected wherever they operate, addressing geo-critical connectivity needs across geographically dispersed sites.
• VoiceLink Solution that seamlessly converts PSTN calls to 4G Voice over LTE (VoLTE), bridging legacy infrastructure and future-proof communication technologies for fire, security, and telecare customers migrating from PSTN.
• CSL Satellite Satellite connectivity solution for IoT devices in areas with limited or no cellular coverage, supporting geo-critical deployments and remote site monitoring.
• CSL Broadband Business-grade broadband connectivity solutions with advanced security features for retail and enterprise operations requiring resilient primary or backup internet connectivity.
• CSL Signal Analyser 2 Signal analysis tool for evaluating and optimising IoT connectivity performance, used by installers and integrators to ensure reliable deployment of connected devices.
• Alarm Signalling Secure alarm signalling solutions for transmitting alarm information from security or fire alarm systems to Alarm Receiving Centres (ARC) or keyholders, supporting safety-critical applications.
• My Base App 2.0 Mobile application for managing IoT connectivity, monitoring device status, and accessing connectivity management features for installed devices.
• CSL Live Real-time connectivity monitoring and management platform for IoT devices and networks, providing visibility and control over deployed SIMs and routers.
• IoT.Live IoT connectivity management platform providing monitoring and management capabilities for connected devices across deployments.
• CSL IoT Platform Comprehensive IoT platform for managing connectivity, devices, and network services across enterprise IoT deployments.
• CSL SIM Insight SIM card management and analytics platform for monitoring SIM performance and usage across the installed base.

Quantifiable outcome

• Millions of global connections supported across major government programmes and multi-site deployments
• +1 more outcomes

Named customers18 records

Segments8 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• VodafonecoreChannel Partner/ Reseller/ DistributorVodafone is a key network partner providing mobile network infrastructure. CSL Group operates as an indirect partner and was awarded Vodafone Indirect Partner Awards 2024 - Channel Deal of the Year. The partnership provides multi-network connectivity options for IoT solutions.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Wireless Logic: UK-headquartered IoT/M2M connectivity provider operating a similar multi-network SIM model with a strong channel and managed services offering — directly comparable size, geography and customer base to CSL Group.
• Eseye: UK-based global IoT connectivity specialist with managed multi-network SIMs and an MVNO-style platform — closely aligned with CSL's critical IoT, multi-network resilience proposition.
• Cubic Telecom: Global IoT connectivity platform serving automotive and enterprise OEMs with managed multi-network SIMs — comparable business model and technology stack to CSL's rSIM-based offering.
• Aeris Communications: Long-standing IoT/M2M connectivity and platform provider for enterprise and connected-vehicle use cases — directly comparable managed cellular IoT services model.
• KORE Wireless: Global IoT/M2M connectivity provider offering managed cellular, LPWA and satellite IoT services — competes for the same mid-market and enterprise IoT customers as CSL.
• JT IoT (JT Group): Channel-first IoT MVNO offering multi-network IoT SIMs and managed services across Europe and globally — directly overlaps CSL's partner-led distribution and product set.
• Soracom: Global cloud-native IoT MVNO with multi-network cellular connectivity and a connectivity management platform — directly comparable platform-and-SIM stack to CSL.

Broad incumbents

• Pelion (Arm Pelion): Broader IoT connectivity and device management platform spun out of Arm — competes with CSL's IoT.Live / CSL IoT Platform offering across enterprise IoT, but at greater scale and with a more generalist positioning.

Others

• Vodafone IoT (Vodafone Business): Both a CSL distribution partner and a potential competitor — Vodafone's own IoT connectivity suite targets many of the same regulated-vertical customers CSL serves.
• Iridium Communications: Global satellite communications provider whose IoT/L-band service competes with CSL's CSL Satellite product line for geo-critical connectivity use cases.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/CSLGroupLtd
• Facebookfacebook.com/CSLDualCom
• LinkedInlinkedin.com/company/csl-group-live

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A2 records

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about CSL Group