Smart DNS vs VPN

The two are marketed side by side and one of them is not a privacy product at all. Being clear about the mechanism makes the difference obvious.

What Smart DNS does

You point your device at the provider's DNS servers. For most hostnames they answer normally. For a specific list of services, they answer with the address of a proxy the provider runs, so your connection to those services goes through the proxy while everything else takes its normal path.

The proxy usually handles only the small part of the session that determines region, and lets the video itself stream directly, which is why it is fast.

What it does not do

Encrypt anything. Your traffic is exactly as visible to your network operator as it was before.

Hide your address from anything not on the provider's list.

Protect you on a shared network. No confidentiality is added at any point.

Change anything about tracking, cookies or fingerprinting.

Calling it a VPN is not a simplification; it is a description of a different product.

Side by side

	Smart DNS	VPN
Encryption	None	All traffic
Speed cost	Almost none	10 to 30 percent
Covers	A specific service list	Everything on the device
Works on devices with no app	Yes, via DNS settings	Only via router or app
Privacy from your network	None	Yes
Safe on public Wi-Fi	No	Yes
Blocked by services	Yes, and easily	Yes, by address reputation

The one thing it is genuinely better at

Devices that cannot run apps and cannot be routed through a tunnel. A Samsung or LG television accepts DNS settings and cannot install anything, so Smart DNS is configurable where a VPN is not without changing the network.

It is also faster, because the bulk of the traffic is not redirected at all.

That is the whole of its advantage, and it is a real one for a narrow case.

Why it is fragile

Redirection is easy to detect and easy to block. A service comparing the address that resolved a hostname with the address that connected sees a mismatch. DNS is also increasingly encrypted by the device itself — browsers with DNS-over-HTTPS, Android's Private DNS, operating systems with their own resolvers — and every one of those bypasses the Smart DNS configuration entirely.

That last point is worth dwelling on: the same mechanism that makes a Smart DNS service work is the one that modern platforms are actively closing for privacy reasons. Its long-term direction is not favourable.

The security question

Handing all your DNS to one provider means that provider sees every domain you resolve, in the clear, with timestamps. That is the same exposure a DNS leak creates, adopted deliberately.

For a service that also encrypts nothing, that is a meaningful amount of trust for very little in return. If you run one, it is worth knowing exactly who operates it and what their retention policy says.

Which to choose

Privacy, safety on untrusted networks, coverage of a whole device: a VPN. Nothing about Smart DNS addresses any of those.

A television that cannot run apps, where the only goal is region and you have accepted there is no privacy benefit: Smart DNS is the configurable option, with the caveat that it breaks more often.

Both goals: a VPN, on the router or on a streaming device in front of the television. The server list covers what each country's exit actually does, which is more useful than a service list you cannot inspect.

If you are running Smart DNS today, the DNS leak test will show you exactly who is answering your lookups. That is a useful thing to look at before deciding how much you trust the arrangement.

What "DNS unblocking" actually looks like on the wire

Worth walking through once, because the mechanism explains every one of its limitations.

Your device asks the Smart DNS resolver for a hostname. For most names it forwards the query and returns the real answer. For a name on its list it returns the address of its own proxy instead. Your device connects to that proxy, which relays the part of the session that establishes region and then usually steps out of the way.

Nothing in that sequence is encrypted by the service, nothing about your other traffic changes, and the whole arrangement depends on your device using the resolver it was told to use. Every layer of encrypted DNS added by browsers and operating systems in the last few years erodes that last assumption.

The setup cost people underestimate

Smart DNS services usually need your current IP address registered with them, so their proxy will accept your connection. Home connections with dynamic addresses change periodically, and when yours does, the service stops working until you re-register.

Some providers offer a small updater program to automate it. On a television, which is exactly the device Smart DNS exists for, there is nowhere to run one.