Cloud vs colocation: key questions for IT and infrastructure decisions
Cloud computing and colocation are two common approaches for running business infrastructure in external data centre environments. Cloud services typically run from large-scale cloud data centres, while colocation allows organisations to place their own hardware inside professionally operated facilities. Each model offers different levels of control, flexibility and operational responsibility.
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How secure is cloud computing for critical data?
Security in cloud computing comes down to controls across infrastructure, networks, identity, monitoring, and recovery, with UK data residency included where regulatory or governance requirements depend on hosting location. This FAQ addresses how cloud computing security protects critical and regulated data across infrastructure, networks, identity, monitoring, and recovery controls.
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What is edge colocation and when does it make sense?
Edge colocation places infrastructure across multiple data centre locations to support application performance, connectivity and operational requirements. Instead of relying on a single centralised site, organisations deploy workloads in regional facilities closer to where data is generated or used. This FAQ explains what edge colocation is, how edge data centres work, and when this approach fits infrastructure strategy.
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Where is cloud data stored and how does it work?
Cloud storage services run on physical infrastructure hosted in data centres. While data is accessed through cloud platforms, it is stored on hardware located in specific facilities and regions. This FAQ explains where cloud data is stored, how cloud data storage works, and why location, connectivity and control matter when managing data in the cloud.
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What is hybrid cloud computing and who needs it?
Hybrid cloud computing allows organisations to operate workloads across a combination of private infrastructure, public cloud platforms, and, where required, existing on-premise systems. It is typically adopted when a single environment does not meet operational, regulatory, performance, or continuity requirements. This FAQ explains how hybrid cloud computing works, how it compares with cloud computing vs on-premise infrastructure, and how cloud computing hosting providers and managed services support hybrid environments.
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Why does location matter when choosing a data centre?
Cloud services and digital platforms still depend on physical infrastructure hosted in data centres. Where that infrastructure is located affects how applications connect to users, how networks are routed, and how organisations manage resilience across sites. This FAQ explains why location matters when choosing a UK data centre, how regional data centres support infrastructure strategy, and why many organisations look for facilities close to their operations when placing critical workloads.
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Business benefits of colocation
Colocation allows organisations to place their own servers and IT equipment in a secure, professionally managed data centre environment. Instead of maintaining infrastructure on-site, businesses use a specialist facility that provides power, cooling, connectivity and physical security.
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Colocation data centre pricing: UK cost and ROI
Colocation pricing depends on how infrastructure is deployed, how much power it consumes, and how it is connected. Rather than a single fixed cost, organisations typically assess pricing alongside total cost of ownership (TCO) and return on investment (ROI) to understand long-term value. This FAQ explains how colocation pricing works in the UK, what drives costs, and how organisations evaluate ROI when comparing colocation with other infrastructure options.
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Cloud service models explained: IaaS vs PaaS vs SaaS
Cloud computing services are typically delivered through three main service models. Each model defines which parts of the technology stack are operated by the provider and which remain under the customer’s control. This FAQ explains the differences between infrastructure, platform and software services, and how organisations choose between IaaS, PaaS and SaaS when planning cloud environments.
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What is cloud Infrastructure as a Service (IaaS)?
Cloud infrastructure as a service (IaaS) provides on-demand compute, storage and networking, while leaving you in control of the operating system and application layer. For UK organisations, IaaS decisions often come down to operational ownership, audit readiness and where infrastructure is hosted. This FAQ sets out what IaaS includes, who it suits, how responsibility is typically split, and what to look for when comparing IaaS cloud solutions.
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What is a Tier 1–4 data centre?
Data centre tiers are used to classify infrastructure based on resilience, redundancy and expected uptime. The most widely referenced framework is the tier classification model, which defines four levels of data centre design from basic capacity to highly resilient environments. This FAQ explains how data centre tier classification works, what distinguishes each tier, and how organisations use these classifications when selecting infrastructure.
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Is colocation right for my business?
Colocation is used by organisations that need reliable infrastructure without operating their own data centre facilities. The most geographically diverse colocation provider in the UK, Pulsant offers purpose-built data centre environments where businesses can place equipment while retaining control over systems, configuration and performance. This FAQ explains why businesses use colocation, when it makes sense, and how to assess whether it fits your infrastructure and operational requirements.
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Edge Data Centres vs Traditional Data Centres: What's the Difference?
The distinction between edge data centres and traditional data centres matters more as businesses move away from centralised infrastructure toward models that prioritise speed, proximity and flexibility. Our platformEDGE network brings together 14 interconnected UK edge data centres, connected by a private 100Gbps network and accessible from every major UK region. This FAQ covers the key differences and how they affect infrastructure decisions.
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How AI and Cloud Computing work together
AI workloads place demands on infrastructure that traditional cloud environments were not originally designed to meet. As UK organisations move from AI experimentation into production, the relationship between AI and cloud computing, where workloads run, how data moves, and how performance and compliance are maintained, becomes a practical infrastructure question. This FAQ covers how AI and cloud computing work together, and what that means for how infrastructure needs to be designed and placed.
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How to choose a UK colocation provider
Choosing the right colocation provider affects how your infrastructure performs, scales and is governed over time. With a range of data centre colocation providers across the UK, the decision comes down to more than price. Location, connectivity, resilience, certifications and the provider's ability to grow with your business all play a role. Pulsant operates 14 interconnected data centres across the UK, making it the most geographically diverse colocation provider in the UK. This FAQ covers what to look for and how to evaluate your options.
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What security should a data centre provide?
Data centre security covers everything from who can walk through the door to how the facility responds to a power failure at 3am. For organisations housing critical infrastructure, understanding what security a data centre should provide is as important as evaluating connectivity or pricing. Pulsant operates 14 UK data centres built to enterprise security standards, holding ISO 27001, PCI DSS and Cyber Essentials accreditations across the estate. This FAQ covers the security layers you should expect from a well-run facility
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Colocation data centre pricing: UK cost and ROI
Colocation pricing depends on how infrastructure is deployed, how much power it consumes, and how it is connected. Rather than a single fixed cost, organisations typically assess pricing alongside total cost of ownership (TCO) and return on investment (ROI) to understand long-term value. This FAQ explains how colocation pricing works in the UK, what drives costs, and how organisations evaluate ROI when comparing colocation with other infrastructure options.
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Preventing data breaches in cloud & colocation
Preventing data breaches in cloud and colocation environments takes more than adding another security product. Risk often builds through weak access controls, inconsistent settings, poor visibility across platforms, or gaps in the way sensitive data is handled. Those issues become harder to manage when workloads are spread across cloud, colocation, and hybrid estates. These FAQs look at practical ways to reduce breach risk across modern infrastructure. They cover common threat areas, stronger security controls, and how resilient UK-based environments can support governance, containment, and recovery.
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What is managed IaaS
Managed IaaS sits between self-managed public cloud and fully hands-on infrastructure. It gives organisations on-demand infrastructure with operational support around the service, which is why it often comes into the conversation when teams are reassessing cost, performance, or control. These FAQs explain what managed IaaS includes, how it differs from DIY cloud, and why cloud repatriation has become a more active strategy for some workloads. They also show how UK-hosted infrastructure can support sovereignty, compliance, and more predictable operations.
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What are the biggest data centre security threats today?
Data centre security threats are increasingly driven by highly interconnected infrastructure. Security risks now extend beyond traditional firewalls to include APIs, cloud integrations, remote management tools, and building systems. The most significant threats fall into two categories: cybersecurity attacks (such as DDoS and API exploitation) and physical security risks (such as unauthorised access and compromised building management systems). Even small configuration errors can now create serious vulnerabilities due to system interdependence.
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Choosing the best cloud service for enterprise AI workloads
Choosing a cloud service for AI workloads at enterprise scale involves more than comparing GPU availability or price per hour. Data location, network performance, security architecture and how a workload will actually run in production all shape whether a platform holds up once AI moves from pilot to live use. Pulsant supports enterprise AI workloads across cloud services hosted in UK data centres, with private connectivity between sites through Edge Fabric. This FAQ covers what to look for when evaluating cloud based AI platforms and how infrastructure decisions affect performance, security and cost.
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What is managed cloud?
Managed cloud combines cloud infrastructure with day-to-day operational support delivered by the provider. Patching, monitoring, capacity planning and incident response sit with the provider, so internal teams are not carrying the full weight of running the environment themselves. Pulsant delivers managed cloud through UK-hosted cloud services, backed by connectivity across 14 UK data centres. This FAQ covers what managed cloud includes, how to choose a provider, and why it suits organisations with strict operational or compliance requirements.
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Can AI replace cloud computing or engineers?
AI is increasingly framed as a replacement for the infrastructure and people that run it, but the two sit in different layers of the stack. AI runs on cloud infrastructure and depends on it, and the tasks cloud engineers handle largely fall outside what AI systems are built to do. Pulsant supports both AI workloads and the underlying infrastructure they depend on through UK-hosted cloud services. This FAQ answers whether AI can replace cloud computing, cloud engineers, or both.
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What is managed hosting?
Managed hosting means an external provider delivers and manages infrastructure, servers, storage and networking, in their own data centre facilities, not infrastructure you own and place there yourself. It's a broad, long-standing industry term, and what it includes varies significantly between providers. This FAQ explains what managed hosting means, how it compares to colocation and cloud, and what to check when evaluating a provider today.
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What is digital content delivery?
Digital content delivery is the process of getting web pages, media, applications and data to users with speed and reliability, regardless of where they are. As traffic volumes grow and user expectations for speed increase, how that content moves, and where it's served from, has a direct effect on performance. Pulsant supports content delivery performance through its Edge Ecosystem, connecting UK data centres via 100Gbps private fibre and offering access to more than 40 networks, major hyperscalers and international carriers. This FAQ explains what digital content delivery involves and why the underlying infrastructure matters.
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What is carrier neutral colocation?
Carrier neutral colocation lets you host infrastructure in a shared facility without being tied to a single network provider. Pulsant's UK data centres operate on a carrier neutral model, connected by its private platformEDGE network, giving organisations direct access to multiple carriers, public cloud platforms and internet exchanges within the same site. This FAQ explains what carrier neutral colocation means and how it affects network flexibility, resilience and cost.
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Understanding data centre compliance
Data centre compliance covers three connected areas: physical facility controls, information security management, and data protection law. Pulsant addresses all three through its UK data centre estate, which holds ISO 27001, PCI DSS and Cyber Essentials certifications and accreditations, though the precise scope varies by standard and service. This FAQ explains what digital compliance means for data centre infrastructure, how GDPR and data residency apply, how responsibilities differ between service models, and what to check when evaluating a provider.
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What is server colocation?
Server colocation means placing your organisation's own servers, storage and networking equipment inside a professional data centre. Pulsant operates 14 interconnected UK data centres, holding ISO 27001 certification across the estate. This FAQ covers what server colocation means, how it works, what it costs, and how it compares to other hosting models.
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How does colocation security work in a shared data centre?
Colocation means sharing a facility with other organisations, so security has to work differently from a single-tenant environment: your equipment needs to be protected from the facility's risks and from every other customer housed alongside it. Pulsant secures its 14 UK data centres with tenant separation built into the facility design. For the baseline physical and cyber controls any data centre should have, see our data centre security FAQ. This FAQ covers what changes specifically in a shared colocation environment, and what to ask a provider before signing.
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Data centre security threats: what to watch for
Data centre security now spans far more than the perimeter and a firewall policy. Interconnected systems, APIs, cloud endpoints and building management tools all create points that can be targeted, misconfigured or exploited. Pulsant secures its 14 UK data centres through layered physical controls, accredited management systems and security services across its cloud and connectivity offering. This FAQ covers the main data centre security threats businesses face and how they can reduce their exposure.
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What is a data centre?
A data centre is a facility a business uses to house its IT equipment, including servers, storage systems and networking hardware. AI workloads, cloud adoption and virtualisation are increasing the computing capacity organisations need, along with the power density, cooling and resilience expected from the facilities supporting it. Pulsant's 14 UK data centres provide that infrastructure across Scotland, the North, the Midlands and the South. This FAQ covers the meaning of a data centre, what makes one reliable and how data centre services are priced.
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What is colocation?
Colocation means housing your organisation's IT infrastructure, including servers, networking equipment and storage, within a third-party data centre, not on your own premises. It gives businesses access to enterprise-grade power, cooling, security and connectivity without the capital cost of building and running those facilities themselves. Pulsant provides colocation across 14 UK data centres connected through its national Edge Fabric network. This FAQ covers how colocation works, its main benefits and what to check before choosing a provider.
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What rack space do I need? Full rack vs quarter rack colocation
Colocation space can range from part of a rack to a full rack, cage or private suite, depending on the amount of equipment, power and separation an organisation needs. Pulsant offers options including full, half and quarter racks, cages and private suites across its UK data centre estate, with availability varying by facility. This FAQ explains what colocation space means, how full and quarter racks compare, and how to work out what you need.
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Business benefits of cloud computing
Cloud computing gets pitched as an obvious win, but the real benefit depends on the workload and how it's deployed. Scalability, flexibility and reduced infrastructure management are genuine advantages, and cloud can meaningfully improve resilience and security when it's built into the strategy from the outset. This FAQ covers the main business benefits of cloud computing, the trade-offs worth weighing, and how to decide what should move to the cloud.
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What is an AI inference platform and why does it matter for workload migration?
An AI inference platform is the infrastructure and software that runs a trained AI model against new data, generating outputs such as predictions, text or images for live applications. As more organisations move AI from pilot projects into live use, where and how inference runs becomes an infrastructure decision that affects compute, connectivity, data location and migration planning. This FAQ explains what an AI inference platform is, where it fits in enterprise infrastructure, and what to assess before migrating an AI workload.
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Q: What is digital compliance?
A: Digital compliance refers to meeting the legal, regulatory and industry standards that apply to how data and IT systems are managed. In a data centre context, this includes information security management, data protection law, and sector-specific requirements such as payment card data handling or financial services regulation.
Q: What is GDPR compliance?
A: GDPR compliance means meeting the requirements of the UK GDPR and Data Protection Act 2018, which govern how personal data is collected, stored, processed and protected. Organisations remain responsible for their own GDPR compliance, but infrastructure choices affect how easily it can be evidenced. UK hosting can make residency easier to demonstrate, though this depends on the specific service, backups and any connected third parties also keeping data within the UK. See our UK data sovereignty overview.
Q: What is cybersecurity compliance?
A: Cybersecurity compliance means meeting recognised standards for protecting systems, networks and data from unauthorised access or attack. ISO 27001 is the most widely referenced framework, and Cyber Essentials covers a baseline set of technical controls addressing common cyber threats. For data centres, this sits alongside physical security, since the two are closely linked. Read more on what security a data centre should provide.
Q: What accreditations should a data centre hold?
A: ISO 27001 is a baseline for information security management. PCI DSS matters where facilities or services support payment card workloads, and Cyber Essentials confirms foundational technical controls are in place. G-Cloud is a public sector procurement framework rather than a security accreditation. Request documented evidence rather than marketing claims, and confirm which specific sites and services each certificate covers, since coverage is not always uniform across an estate. See our full governance credentials for the current list.
Q: How does data centre compliance support GDPR requirements?
A: A compliant data centre or cloud environment can provide controls that support GDPR obligations, including physical access controls, service monitoring, backup capability and documented security processes. The controls supplied by the provider depend on the service model, and customers remain responsible for their own use of personal data and for confirming that the overall environment meets their obligations.
Q: What compliance requirements apply to financial services workloads?
A: Financial services organisations need controls that go beyond general information security. Under FCA and PRA operational resilience rules, firms must map important business services, set impact tolerances for disruption, and identify third-party dependencies that could affect those tolerances, though responsibility stays with the regulated firm, not the provider. Separately, outsourcing and third-party risk requirements cover contractual oversight, continuity and exit planning.
Does compliance responsibility differ between colocation, public cloud and managed IaaS?
A: Yes. With colocation, the customer owns and manages the hardware, so most obligations around configuration and data handling sit with them, while the provider secures the physical facility. With public cloud, the provider manages the platform, but the customer configures and secures what runs on it. Managed IaaS sits between the two, with the provider taking on more operational responsibility while the customer typically remains the data controller.
Q: Why does UK data residency matter for compliance?
A: UK data residency generally means specified data is stored and processed within the UK, which matters for GDPR, financial services regulation and sector-specific frameworks requiring clear jurisdictional control. Global cloud platforms can spread data across multiple regions, creating uncertainty about which laws apply. Pulsant supports UK data residency through UK-hosted infrastructure and private Edge Fabric connectivity between its UK facilities, though Edge Fabric also connects to public clouds and global providers, so which jurisdiction applies depends on the architecture an organisation chooses.
Q: What are the breach notification requirements organisations need to plan for?
A: Under UK GDPR, organisations must report a qualifying breach to the ICO within 72 hours of becoming aware of it, and notify affected individuals without undue delay where it's likely to result in high risk to their rights. Financial services firms may have additional FCA or PRA notification obligations. Delays in a provider's own incident notification eat into the time an organisation has to assess and report, so ask what notification period the provider commits to contractually.
Q: How often are data centre compliance certifications audited?
A: ISO certifications are typically valid for three years, with periodic surveillance audits during that period and recertification at the end of the cycle. Cyber Essentials is renewed annually. Ask for the certificate, its expiry date, scope, and which sites and services it covers, since a certificate bearing a provider's name doesn't automatically cover every facility.
Q: How do you assess whether a provider's compliance credentials meet your requirements?
A: Ask what happens between audits, how incidents are reported, and whether the provider will support your own audit or penetration testing requirements. Our colocation provider FAQ covers the wider evaluation criteria alongside compliance.
Q: What is the difference between compliance and security?
A: Security refers to the technical and physical measures protecting systems and data. Compliance refers to demonstrating, through certification and evidence, that those measures meet defined standards. A data centre can have strong security without formal certification, but compliance provides independently verified proof that a third party, such as an auditor or regulator, can rely on.
Checking whether your data centre meets your compliance requirements? Get in touch with our team to discuss your certification, accreditation and audit requirements.
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