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ISG Provider Lens™ Network – Software-Defined Solutions & Services 2025 U.K. Report

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Compare the U.K.’s Top SD-WAN and SASE Providers in ISG’s 2025 Market Report: GTT Recognised as a Leader

What you’ll gain from this report

Independent analysis of 40+ providers
Insights on market trends and vendor strengths
A faster path to confident decision-making

a snapshot of the report highlights

Managed SD-WAN Services – a strategic enabler for transformation As U.K. organisations embrace large-scale SD-WAN solutions for quick branch provisioning with dispersed edge sites, SD-WAN becomes integral to their cloud migration and security strategies. GTT is recognised for our mature network infrastructure, strong emphasis on security, tailored service delivery, customer-centric approach and simplified network management through our Envision platform.
Secure Access Service Edge (SASE) – the architecture for secure hybrid work This ISG report covers how U.K. enterprises seek integrated networking and security solutions, spanning from the core to cloud to the edge. GTT meets market demand by offering cloud-based, single- and multivendor options to secure endpoints across offices, hybrid clouds and remote workforces.
SD-Network Transformation Services – achieving agility and scale To enable AI, IoT, seamless user experiences and robust cybersecurity, ISG highlights that enterprises need to rearchitect their networks for agility, security and scalability. GTT is named a ‘Rising Star’ for our SDN consulting and implementation services in the UK. Our expertise, customer-centric approach and focus on enabling cloud adoption is highlighted. Our pod-based support structure and commitment to understanding customer outcomes are key strengths.
Edge Technologies and Services – performance and flexibility matter In the U.K., edge computing has been expanding rapidly and consistently. The firm assesses provider readiness in private 5G, IoT integrations, and data processing closer to the source, which are key for operations that can’t afford latency or centralised bottlenecks.

Whether you're reviewing your current vendor or building a shortlist, this report helps you make informed comparisons. ISG's quadrant layout and provider profiles provide clear benchmarks, and its analysis supports sourcing discussions, budget planning and board-level decisions.

It's also practical for architects who are mapping how SD-WAN, security and edge services intersect and what those choices mean for internal teams. With clear strengths and cautions outlined for each provider, the ISG report is a reliable reference for both strategic and technical decision-makers.