FastestVPN describes itself as a Cayman Islands based company, and its privacy policy points to that jurisdiction's lack of mandatory data retention laws. It publishes a no-logs audit report from Altius IT, which it calls an independent California-based auditor. FastestVPN sells both full apps and browser extensions, and its support site says the extensions secure only browser traffic. Knowing which of the two you are running is the first step in reading the IP, DNS and WebRTC lines.
If you are on a FastestVPN browser extension, FastestVPN says it covers only browser traffic, so other apps on the device keep their usual route. If the DNS line shows your ISP on a manual or third-party setup, FastestVPN's Windows guide says leaks can appear there and recommends its dedicated Windows app.
This reports what your browser shows in this session. It does not certify FastestVPN, does not test every server, app or device, and does not prove anonymity.
Current-session checks
What this FastestVPN self-test checks
With a FastestVPN extension, watch the WebRTC line, since FastestVPN says its extensions include WebRTC leak protection. With the full app, focus on the DNS line, which FastestVPN ties to its DNS leak protection.
FastestVPN's privacy policy says it notes the day you connect but not connection timestamps, and keeps bandwidth totals for maintenance.
Company and audit
FastestVPN says it is a Cayman Islands based company and cites the jurisdiction's lack of mandatory data retention laws. It says it passed its first independent audit by Altius IT, covering the app, the servers, the features and all legal policies. The report is offered as a download on its audit page.
App or extension
FastestVPN's support site says the extension is only responsible for securing browser traffic, and that the extensions include WebRTC leak protection. With an extension on, expect this browser's results to change while other apps on the device keep their normal route.
Kill switch and split tunneling
FastestVPN says its Internet Kill Switch cuts the internet connection when the link to the VPN server is lost. Its split tunneling routes selected application traffic through the VPN tunnel and can be switched on or off manually. Traffic outside the selected apps is not expected to carry a FastestVPN address.
Manual setups and DNS
FastestVPN's Windows guide says a third-party client can show DNS leaks and recommends its dedicated Windows app to avoid them. The support site also has a guide to disabling IPv6 on Windows.
Protocols and devices
FastestVPN lists OpenVPN, IKEv2, IPSec, OpenConnect and L2TP among its protocols. One subscription covers up to 10 devices at a time. If you test several devices, run the baseline and connected checks on each one.
Between the readings
Record a kill-switch drop on FastestVPN
FastestVPN's features page says its Internet Kill Switch terminates the internet connection if the connection to the VPN server is lost. Its support site lists the kill switch among the benefits of the apps rather than the extensions.
FastestVPN, Cayman Islands. The audit report names the company Fast Technology Limited. fastestvpn.comRead 19 Oct 2026
Who owns which VPN: every provider’s company and the groups that run several brands.
What this cannot prove
This checks visible browser/session signals only.
This does not certify the provider.
This does not test every server, app, device, or connection.
This does not prove anonymity.
This does not prove every security condition.
A clean result does not prove every leak is absent.
How to compare before and after on FastestVPN
Before connecting FastestVPN, keep a copy of the results this page shows.
Start the FastestVPN app, or switch on the extension if that is what you use, and choose a location.
Repeat the full set of checks in the same browser.
Look for a changed IP and DNS; with the extension, only this browser is expected to change.
Safe Copy limits
Safe Copy exports use safe summary categories and remove raw IP, exact city, full user-agent, raw fingerprint data, raw resolver IPs and WebRTC candidates. It is not a certificate, provider audit, or proof of anonymity.
FAQ
FastestVPN leak test FAQ
Where is FastestVPN based?
FastestVPN describes itself as a Cayman Islands based company. Its privacy policy says the jurisdiction has no mandatory data retention laws.
Has FastestVPN been audited?
FastestVPN says it passed its first independent audit by Altius IT, covering the app, servers, features and legal policies, and offers the report as a download.
Does the FastestVPN extension protect my whole device?
FastestVPN's support site says the extension is only responsible for securing browser traffic, and that the extensions include WebRTC leak protection.
How does the FastestVPN kill switch work?
FastestVPN says its Internet Kill Switch terminates the internet connection if the connection to the VPN server is lost.
What does FastestVPN say it logs?
Its privacy policy says it notes the day you connect but not connection timestamps, and stores bandwidth totals for maintenance.
Why might DNS leak on a manual FastestVPN setup?
FastestVPN's Windows guide says third-party clients may show DNS leaks and recommends the dedicated Windows app instead.
Other provider self-tests
The same current-session checks, walked through for another provider. Listed alphabetically; this is not a ranking or a comparison.