Cloud solutions are often presented as the automatically correct way forward. On-premise servers are often dismissed as outdated and cumbersome. The truth is more nuanced. For your business, one or the other may make clearly better sense depending on a handful of concrete factors.

Let's review both options honestly.

What's the actual difference?

On-premise means that your servers and IT infrastructure are physically located at your premises: in a server room, an equipment closet, or at a dedicated data center you rent yourself. You own the hardware, and you have full control.

Cloud means that your data and systems run on servers owned and operated by a third party, typically Microsoft Azure, Amazon Web Services, or Google Cloud. You pay a subscription and access everything via the internet.

Most businesses today end up in a hybrid model, but more on that later.

Total cost of ownership: what's cheapest in the long run?

Cloud is often marketed as a lower initial investment, and that's true. There's no major hardware investment upfront. But over time, cloud subscriptions can accumulate into a substantial fixed cost that grows with the number of users and data volumes.

On-premise requires an initial hardware investment (typically 50,000–200,000 DKK depending on size), but it's amortized over 4–6 years. Add to that costs for power, backup, maintenance, and IT support.

Rule of thumb:

  • Under 10 users: Cloud is almost always cheaper and easier
  • 10–50 users: It depends greatly on which systems you run
  • Over 50 users with heavy data workloads: On-premise or hybrid can be cost-effective

Remember to include hidden cloud costs: egress fees (charges for retrieving data from the cloud), premium support, extra storage, and price increases at contract renewal.

Important: Always compare the full total cost of ownership over 5 years, not just the monthly price. A cloud solution at 5,000 DKK/month costs 300,000 DKK over 5 years. An on-premise server at 150,000 DKK with 2,500 DKK/month in operating costs costs the same.

GDPR and data sovereignty: where can your data be stored?

This is a question that takes up more and more space in Danish businesses, and rightly so. GDPR requires that personal data is processed lawfully, and that includes requirements regarding where data is stored.

Transferring personal data to countries outside the EU/EEA requires specific legal grounds. This is what invalidated the Privacy Shield agreement with the USA in 2020 and created a period of legal uncertainty. Today there is a new EU-US Data Privacy Framework, but the situation can change again.

What do you do in practice?

  • Use cloud providers that guarantee EU-based data processing. Microsoft Azure, Google Cloud, and AWS all have EU regions. Make a written demand for EU storage in the contract.
  • Make sure to have a data processing agreement (DPA) with your cloud provider. It's a GDPR requirement.
  • Be aware that even with EU-based servers, support personnel in the USA may access data. Consider whether that's acceptable in your industry.

For businesses in the healthcare sector, public institutions, or defense industry, data sovereignty is particularly critical. On-premise or private cloud solutions are often preferred for exactly that reason.

Advantages and disadvantages: an honest account

Cloud: advantages

  • No hardware investment, easy scaling up and down
  • Accessible from any device and location
  • The vendor handles updates and maintenance
  • High uptime and geographic redundancy

Cloud: disadvantages

  • Ongoing subscription costs that increase over time
  • Dependent on internet connectivity: no net, no access
  • Limited control over what happens to data behind the scenes
  • Risk of price changes and altered terms at contract renewal

On-premise: advantages

  • Full control over data and infrastructure
  • Lower ongoing costs in the long run
  • Independent of internet connectivity for internal systems
  • Easier compliance for industries with strict data requirements

On-premise: disadvantages

  • Large initial hardware investment
  • Requires internal expertise or an IT partner for maintenance
  • You are responsible for backup, security, and updates
  • Scaling requires new hardware investment

The hybrid model: the best of both worlds

Most SMBs today run a hybrid approach: cloud for email, collaboration tools, and file sharing (typically Microsoft 365), and on-premise for systems that require high performance, large data volumes, or special compliance, such as ERP, accounting, or production management.

The hybrid model is not a compromise but a pragmatic approach that matches the right tool to the right need.

Which industries prefer what?

It's a pattern we see repeatedly:

  • Law firms and accountants: Often a hybrid. Cloud for communication, on-premise for client cases with confidential documents.
  • Manufacturing companies: On-premise for production management and ERP, cloud for office functions.
  • Healthcare sector: On-premise or private cloud due to patient-data requirements.
  • Retail and service with multiple locations: Cloud is almost always best: simple to administer across locations.
  • Startups and growth companies: Full cloud. Flexibility and scalability outweigh cost optimization in that phase.

The right choice is the one that matches your actual needs, risk profile, and budget, not what the IT industry is currently promoting most. Ask questions. Demand concrete numbers. And choose an IT partner who gives you an honest answer rather than one that fits what they're selling.