Self-Hosting vs Sovereign Cloud: When Is It Better to Host Yourself?
Should you host services in-house or trust a European sovereign cloud provider? A practical decision guide for Belgian SMEs based on their size and resources.
The False Dichotomy
When a Belgian SME decides to take back control of its data, it often faces a first decisive question: should it self-host or trust a European sovereign cloud provider?
This question has no universal answer. Both approaches are legitimate and each excels in different contexts. This guide helps you decide based on your actual situation.
Defining the Terms
Self-hosting: you manage your own servers — either physically on your premises (on-premises), or on a rented server at a hosting provider (VPS or dedicated server). You are responsible for installation, configuration, updates, and security.
European sovereign cloud: you use the managed services of a European cloud provider (OVHcloud, Hetzner, Scaleway, Infomaniak, etc.) that operates the infrastructure for you. You configure the services, but you do not manage the underlying servers.
The hybrid approach — self-hosting for the most sensitive data, sovereign cloud for less critical services — is often the most pragmatic solution.
The Decision Factors
1. Available Technical Skills
This is the most determining factor. Managing a self-hosted server is much more than installing software. It involves:
- Linux system management (updates, monitoring, logs)
- System security (firewall, fail2ban, SSH access management)
- Backup management and restoration testing
- Proactive monitoring (alerts, response times, disk space)
- Incident response (what happens at 3 AM?)
If you do not have these skills in-house, self-hosting is not a good idea — not because it is impossible to learn, but because critical systems deserve consolidated expertise.
2. Team Size
Time spent on system administration has an opportunity cost. For a solo founder or an SME of fewer than 10 people with no internal IT, every hour spent managing servers is an hour not spent on the core business.
3. Compliance Requirements
Certain sectors impose specific requirements that influence the choice:
- Health data (GDPR + HDS): hosting must be HDS-certified in France, or equivalent. OVHcloud offers an HDS product; self-hosting may also be suitable if the certifications are obtained.
- Belgian public sector: data localisation requirements within Belgium may apply.
- Enterprise clients: security audits may require ISO certifications that SMEs cannot easily obtain for their self-hosted infrastructure.
4. Availability Requirements
A self-hosted service on a single server at your office goes down when your internet connection fails, when the server suffers a hardware failure, or when there is a power cut. For a service requiring 99.9% availability, you need a redundant architecture — which considerably complicates self-hosting.
European sovereign cloud providers offer contractually guaranteed availability SLAs and redundant infrastructure by default.
5. True Total Cost
Self-hosting is often presented as cheaper. This is only true when looking solely at hosting costs. You must also factor in:
- Hardware or VPS cost
- Human administration time (valued at the real cost of the person)
- Licences for monitoring, backup, and security tools
- Incident costs and resolution time
For an SME without internal IT, sovereign cloud is almost always cheaper in total cost — especially for communication and collaboration services.
Comparison Table
| Criterion | Self-hosting | Sovereign cloud |
|---|---|---|
| Maximum control | Yes | No (provider dependency) |
| Initial cost | Low (if VPS) | Low |
| Operational cost | Variable (IT time) | Predictable (subscription) |
| Skills required | High | Low to medium |
| Availability | Variable (your responsibility) | Guaranteed by SLA |
| Backups | Your responsibility | Often included |
| Security updates | Your responsibility | Managed by provider |
| GDPR compliance | Your responsibility | Facilitated (DPA contract included) |
| CLOUD Act exposure | None (if VPS at EU host) | None (EU provider) |
| Sector certifications | Difficult to obtain | Available from some providers |
| Scalability | Limited (planning required) | Flexible and fast |
Use Cases Where Self-Hosting Excels
Ultra-sensitive data under full control
For strategic data where you want nobody else to have access — even theoretically — to the physical server, on-premises self-hosting at your offices (with adequate physical access controls) is the only option offering absolute control.
Example: Law firm with confidential client files, engineering bureau with critical intellectual property.
Very tight budget with in-house IT skills
An experienced developer or system administrator can manage a Nextcloud + email + monitoring infrastructure on a Hetzner VPS for less than €30/month, covering a team of 20 people.
Example: Technical startup with a CTO capable of managing infrastructure.
Maximum sovereignty over development tools
For source code, CI/CD pipelines, and development environments, self-hosting Gitea/Forgejo on Hetzner provides full control over your main intellectual property.
Use Cases Where Sovereign Cloud Excels
SME without an IT team
For an SME of 10 to 50 people with no dedicated IT resource, Infomaniak (email, storage), OVHcloud (web hosting, managed VPS), or a specialised Nextcloud hosting provider allow you to benefit from sovereignty without the operational complexity.
Critical services with availability requirements
Your website, email, or ERP must not go down because your self-hosted server had a disk problem. For business-critical services, sovereign cloud with a contractual SLA is safer.
Sector compliance
If you need HDS, ISO 27001, or PCI-DSS certifications, it is better to rely on a provider that already holds them — obtaining them yourself is costly and time-consuming.
The Hybrid Approach: The Practical Recommendation
The self-hosting vs sovereign cloud dichotomy is often false. The pragmatic answer for most Belgian SMEs is a hybrid architecture:
| Service | Recommendation | Reason |
|---|---|---|
| Professional email | Sovereign cloud (Infomaniak) | Critical availability, complex deliverability |
| File storage | Self-hosted Nextcloud (Hetzner VPS) | Sensitive data, maximum control |
| Website | Sovereign cloud (OVHcloud / Hetzner) | Performance, CDN, SLA |
| Source code | Self-hosted Gitea/Forgejo | Intellectual property |
| Video conferencing | Sovereign cloud (Infomaniak kMeet) | Reliability, no maintenance |
| Analytics | Self-hosted Plausible or Matomo | Statistical data, simple installation |
| CRM | Sovereign cloud (Odoo.com EU) | Software complexity, updates |
Recommendation by Company Size
1–10 employees, no internal IT: sovereign cloud for everything (Infomaniak for the suite, OVHcloud or Hetzner for web hosting). Priority on simplicity and reliability.
10–50 employees, 1 IT person: hybrid. Email and website on sovereign cloud. Self-hosted Nextcloud on Hetzner for files and collaboration. Gitea/Forgejo if you have technical teams.
50+ employees, IT team: evaluate self-hosting for critical services. Invest in monitoring and backup procedures. Maintain sovereign cloud for services with high availability requirements.
Revisiting the Opening Question
The real question is not "self-hosting or sovereign cloud?", but "what skills do we have, what are our priority risks, and what is our operational appetite?"
Answer those three questions, and the choice becomes clear. If you need help working through this analysis for your organisation, that is precisely what we do.