Why free VPNs are dangerous: logs, ads, leaks, traffic sales
A free VPN is dangerous for a simple reason: servers, traffic, developers, and support cost money, and if you are not paying, someone is paying for you. Such a service has only three sources of revenue: selling logs and behavioral data, injecting ads into pages, and reselling your bandwidth and IP address to other clients.
The risks themselves are not theoretical. A Consumer Reports study examined 16 major VPN apps and recorded discrepancies between “no logs” promises and actual policies; Norton separately describes typical scenarios found specifically in free products. Below is what exactly you pay with when you “do not pay a single rouble,” and how such apps behave on iOS and Android.
At the end, we will look at how a safe paid VPN and a self-hosted solution differ from a free one, and why for serious use cases (banking, work email, personal data) a free VPN is the worst available option.
In short
- A free VPN makes money from you — there is no other economic scenario.
- The main monetization models are activity logs, selling traffic, advertising, and selling your IP for other people’s tasks.
- Most “free VPN” services store at least some logs, despite “no logs” labels.
- Android clients of free VPNs are regularly caught with trackers and malware.
- Typical technical problems: DNS leaks, WebRTC leaks, no kill-switch.
- The alternative is a paid VPN with a clear jurisdiction or your own server on a VPS.
Where a free VPN gets its money: the business model
The easiest way to understand the real danger is through the economics. Server rental, abuse-resistant IPs, engineers, marketing — all of these are cost items that cannot be covered by “enthusiasm.” If an app is distributed for free to millions of people, there has to be a counterflow.
Logs and behavioral data
The oldest scenario. A VPN sees all your traffic: where you go, how long you stay, what you use, and from which device. This data is sold to ad networks, data brokers, and analytics companies. It is often written into the user agreement in small print and presented as “aggregated, anonymous data” — in practice, aggregation does not prevent linking a profile to a specific device.
Ad injection and link substitution
When a site opens over HTTP, a free VPN can insert its own ad code, banners, or affiliate links into the page. This no longer works over HTTPS, so some clients have been found substituting root certificates — that is no longer “advertising,” it is a compromise of all encryption on the device.
Reselling traffic and the IP address
The most unpleasant model. Your IP and bandwidth become an exit node for someone else’s traffic — ad clickers, scrapers, and sometimes worse things. You will not know about it until a complaint arrives at your address or captchas appear everywhere.
Malware and trackers in clients
Studies of Android catalogs regularly find built-in tracker SDKs, hidden redirects, and sometimes full-fledged malware in popular free VPNs. On iOS the situation is slightly better because of App Store review, but analytics trackers are found there as well.
What they promise and what happens in reality
| Promise in the store | What actually happens | What it can lead to |
|---|---|---|
| No logs, we do not store anything | Session metadata is stored, sometimes DNS requests | The activity profile is sold to ad networks |
| Secure connection on any network | DNS and WebRTC leaks, no kill-switch | The ISP sees the sites, the real IP is exposed |
| Free forever | Traffic limit, ads inside the client | Ads with trackers and redirects |
| Thousands of servers worldwide | Other users exit through your IP | Captchas, bans in services, complaints |
| Military-grade encryption | HTTP injection of ads and affiliate links | Page substitution, TLS compromise |
| No registration required | Identification by device ID, advertising ID | The profile is tied to the device, not to an email address |
How to check right now
If you are currently using a free VPN and have doubts, start with two simple things. First: check whether your real IP is visible in third-party tests while the VPN is enabled (DNS leak, WebRTC leak). Second: compare how the service looks from the outside — which sites it actually opens and which it does not — through one operator and through another.
Freedom Checker gives an independent picture of availability: it runs uniform checks from probes in different operators and regions and shows where access is really open and where there is a block. This helps you understand what exactly your VPN is “fixing” and whether it is misleading you with a nice UI.
Failure or blocking?
Free VPNs have a typical pattern: externally everything is connected, the indicator is green, but half the sites do not open, speed drops by dozens of times, and the browser catches captchas and redirects. This is not a “failure” in the sense of a temporary outage — it is the normal operating mode of a service with overloaded servers and dirty IPs that are already being reported.
Blocking behaves differently: there is a connection, but a specific list of resources (Gosuslugi (Госуслуги), banks, marketplaces) is closed by itself regardless of the VPN. If you remove the VPN and the site opens, but with any other VPN it does not, the issue is no longer the free client but the anti-fraud policy of the specific service.
What to pay attention to
- Who the app publisher is and whether it has a legal entity in a clear jurisdiction.
- A transparent logging policy and independent audit — reputable paid services make this public.
- Whether there is a kill-switch and DNS leak blocking in the client settings.
- What permissions the Android client requests — a VPN should not request access to contacts and SMS.
- Whether чужая advertising appears in the browser when the VPN is enabled — this is a sign of injection.
- A free VPN is categorically unsuitable for banking, work email, or sensitive data.
- If you need a free scenario, use self-hosting on a personal VPS, not a shared public one.
Conclusion
“Free” in the case of a VPN is not a price, it is a marker of the business model. Logs, advertising, traffic sales, and encryption compromise are found in free services not as an exception, but as a rule. A detailed analysis of the risks can be found in the Consumer Reports report on the VPN industry and in the Norton overview.
If the task is privacy and stable access, the choice is simple: a paid service with a clear jurisdiction or your own VPN on your own VPS. A free VPN is suitable at most for a one-time availability check of a random site, not for everyday use.