VPS vs VDS vs dedicated server explained simply

When you shop for a server you see three names: VPS, VDS and dedicated server. Hosting companies sometimes use them as if they meant very different things, sometimes as synonyms. This article explains what each term means in practice, what KVM has to do with it and how to choose.

Shared hosting, the starting point

To understand the others, start with the simplest option. On shared hosting hundreds of websites live on one server under one operating system. You get a folder and a control panel, but no root access. You cannot install your own software, and a noisy neighbor can slow your site down. It is fine for a simple site, but not for bots, game servers, nodes or custom apps.

What a VPS is

A VPS (virtual private server) is a virtual machine running on a powerful physical server. Special software, the hypervisor, splits the physical machine into several isolated virtual machines. Each one has:

• its own operating system, which you choose (Ubuntu, Debian, AlmaLinux and others);
• its own share of CPU, RAM and disk;
• its own IP address;
• full root access, so you can install anything you want.

From the inside a VPS feels like a normal server. You connect over SSH, install packages and run services. Other customers on the same physical machine cannot see or touch your files.

What a VDS is

VDS stands for virtual dedicated server. Technically it is the same thing as a VPS: a virtual machine with its own OS and root access. The term is common in Russian speaking and some European markets.

Some providers use "VDS" to stress that resources are reserved for you rather than shared, and "VPS" for cheaper offers where CPU is oversold. But there is no standard definition. Do not choose by the name, look at what the plan actually gives you: the type of virtualization, whether vCPU and RAM are dedicated, the disk type and the traffic.

Why KVM matters

The hypervisor decides how isolated your server really is. KVM (Kernel-based Virtual Machine) is full hardware virtualization built into the Linux kernel. With KVM:

• You run your own kernel. You can load kernel modules, use Docker without restrictions and even install FreeBSD or Windows.
• RAM is really yours. Memory assigned to your VM is not silently borrowed by neighbors.
• Isolation is strong. Each VM is a separate virtual machine, not a container sharing one kernel.

Older container based virtualization, such as OpenVZ, shares one kernel between all customers. It is cheaper for the provider, but you cannot change the kernel, and some software, including parts of Docker, does not work properly.

All DataPasa servers are KVM virtual machines with dedicated vCPU and RAM, NVMe SSD storage and full root access. So whether you call it a VPS or a VDS, the result is the same.

What a dedicated server is

A dedicated server is a whole physical machine rented to one customer. No hypervisor splits it and nobody else runs on it. You get:

• all CPU cores, all RAM and all disks of the machine;
• predictable performance with no neighbors at all;
• direct access to the hardware, useful for special setups.

The trade offs: it costs much more, it takes longer to provision, and scaling up usually means moving to another machine rather than picking a new plan.

Side by side

	Shared hosting	VPS / VDS (KVM)	Dedicated server
Root access	No	Yes	Yes
Your own OS and kernel	No	Yes	Yes
Resources	Shared with everyone	Your share, reserved	The whole machine
Neighbors	Many	Isolated VMs	None
Price	Lowest	Low to medium	High
Setup time	Minutes	Minutes	Hours to days
Good for	Simple sites	Almost every project	Heavy, constant loads

Which one to choose

Choose a VPS if:

• you run websites, APIs, bots, AI agents or Docker apps;
• you want to host a blockchain node such as a pruned Bitcoin or Monero node or a Celestia light node;
• you are learning Linux and want a server you can reinstall any time;
• your load changes and you want to start small and grow.

This covers the vast majority of projects. A VPS with 2 to 8 GB of RAM handles more than most people expect. See how much RAM your VPS needs for concrete numbers.

Choose a dedicated server if:

• your project constantly needs more CPU, RAM or disk than the largest VPS plan offers;
• you need all the performance of a machine at all times, for example a large database, a full Ethereum or Solana node, or heavy compute;
• you have compliance rules that require single tenant hardware.

What DataPasa offers

Today DataPasa offers KVM VPS plans from 1 vCPU and 1 GB of RAM up to 8 vCPU and 24 GB of RAM, billed by the hour from a prepaid balance with no contract. Servers run in a data center in Falkenstein, Germany, and are ready a few minutes after ordering. Dedicated servers are coming soon.

Ready to start? Follow how to buy a VPS, or compare plans on the pricing page.

Summary

VPS and VDS are two names for the same thing: a virtual machine with its own OS and root access. What matters is the virtualization (KVM is the one you want), dedicated resources, disk type and traffic. A dedicated server is a whole physical machine and makes sense only for heavy, constant loads. For almost every project, a KVM VPS is the right place to start.