Since .NET Core, the “Windows only” assumption about .NET is dead — ASP.NET Core runs natively on Linux, and .NET 8 and .NET 9 are fully cross-platform. That leaves developers with a real choice: host a .NET application on Windows Server with IIS, or on Linux with Nginx and Kestrel. The decision affects your monthly cost, your memory footprint, your deployment tooling, and how much time you spend on maintenance. This comparison lays out the concrete differences for .NET development and hosting so you can pick based on your actual workload rather than habit.
What .NET Can Run Where
| Workload | Windows VPS | Linux VPS |
|---|---|---|
| .NET 8 / .NET 9 (ASP.NET Core) | Yes (IIS + ANCM) | Yes (Kestrel + Nginx) |
| .NET Framework 4.x (legacy apps) | Yes | No |
| Windows Forms / WPF apps | Yes | No |
| SQL Server Express / Standard | Yes | Yes (Linux support) |
| Active Directory integration | Native | Via LDAP / SSSD |
If your codebase is a modern ASP.NET Core app, both platforms can host it. If you are maintaining a .NET Framework application, a Windows VPS is not a preference — it is a requirement.
Cost: The License Is the Difference
At identical hardware, a Windows VPS costs more because the Windows Server license (typically $20–$40 per month for Standard, usually bundled into the plan) is added to the bill. Linux has no licensing cost. A concrete example: a 4 vCPU / 8 GB RAM VPS might cost $24 per month on Linux and $36–$48 per month on Windows at the same provider. Over a year, that is a $150–$300 difference per server.
Two caveats. First, some providers absorb the license cost better than others — compare Windows VPS plans on our comparison table to see who bundles licenses at fair prices. Second, SQL Server licensing is separate on both platforms; if you need SQL Server Standard, budget $100+ per month in licensing either way.
Memory and Performance Footprint
Windows Server idles at roughly 1.5–2 GB of RAM; a minimal Ubuntu or Debian install idles below 300 MB. For a small ASP.NET Core API with a 512 MB working set, you can host several apps on a 4 GB Linux box that would barely fit one on Windows. On the CPU side, both platforms run the same .NET runtime, so pure compute performance is nearly identical — the difference is operational overhead, not raw speed.
If your workload is containerized, Linux is the pragmatic choice: Windows containers require Windows Server Core images that are 5–10x larger than Linux base images, and Docker Desktop on Windows Server is not a supported production path. For Kubernetes, Windows nodes exist but are a niche; most .NET workloads on Kubernetes run on Linux nodes.
Deployment and Tooling
- Windows + IIS: publish with
dotnet publish, create an application pool in IIS Manager, install the ASP.NET Core Hosting Bundle, and point the site at the published folder. Web.config handles most configuration. It is a well-trodden, GUI-driven path that is easy to explain to Windows administrators. - Linux + Nginx:
dotnet publishto a folder, run the app as a systemd service, and reverse-proxy with Nginx. Configuration lives in text files (appsettings.json,nginx.conf), which makes it more natural for CI/CD pipelines and Infrastructure-as-Code.
# Windows + IIS (run on the server, then create the app pool)
dotnet publish -c Release -o C:\inetpub\apps\myapp
# Linux + Nginx (run on the server, then restart the service)
dotnet publish -c Release -o /var/www/myapp
sudo systemctl restart myappBoth paths work fine with Azure DevOps and GitHub Actions: the runner just needs the .NET SDK installed, and deployment is a copy or a container push. If your team is already Windows-centric, the IIS route has the shortest learning curve.
A Decision Framework
- Choose Windows if you run .NET Framework apps, need IIS-specific features (ARR, URL Rewrite, Web Deploy), integrate with Active Directory, or your team has no Linux operations experience.
- Choose Linux if you are starting fresh with ASP.NET Core, want the lowest cost per GB of RAM, plan to containerize, or are building a microservices fleet.
- Choose hybrid if you must keep one legacy .NET Framework service but want new services on Linux — the two can coexist on separate VPS plans under one provider.
Whichever side you land on, the provider matters as much as the OS: check RAM allowances, disk I/O, bandwidth, and whether the Windows license is truly included. See the full specs and pricing on our Windows VPS comparison table to shortlist candidates.
Contabo offers both Windows and Linux VPS at aggressive prices with high RAM allowances — a good option if you want headroom to run Linux nodes cheaply while keeping a Windows box for legacy .NET Framework services. Check Contabo VPS pricing.
Bottom Line
For new ASP.NET Core projects, Linux usually wins on cost and efficiency, and the .NET runtime performs identically on both platforms. For anything touching .NET Framework, IIS-specific features, or Windows authentication, a Windows VPS is the right call — and the license cost is a fair trade for the compatibility. Decide on the workload first, then on the provider, and the OS choice becomes obvious. If you are still unsure, spin up a small instance on each platform and run your own deployment pipeline against both — a weekend of testing beats a year of second-guessing a migration.
