The Complete VPN Guide
Everything you need to know about VPNs — how they work, which protocol to choose, speed benchmarks across 5 providers, legal status in 50+ countries, and which VPN to actually buy for your use case. No filler.
What Is a VPN?
A VPN (Virtual Private Network) creates an encrypted tunnel between your device and a server operated by the VPN provider. All your internet traffic passes through this tunnel, which does two things: it hides your real IP address from websites and it encrypts your data so your ISP, hackers on public WiFi, and governments cannot see what you're doing online.
Think of it as a secure pipe. Without a VPN, your ISP sees every website you visit, every file you download, every search you make. With a VPN, they see encrypted gibberish going to a single server address — nothing more.
VPNs don't make you anonymous. They shift trust from your ISP to the VPN provider. That's why choosing a provider with audited no-logs policies matters enormously. More on that below.
How VPNs Actually Work
When you connect to a VPN, your device establishes an encrypted connection to a VPN server. Here's the data flow:
Your ISP only sees encrypted traffic going to the VPN server's IP. The website only sees the VPN server's IP — not yours. The VPN provider is the only party that could see both sides, which is why no-logs policies matter more than any other feature.
The encryption standard used by modern VPNs is AES-256 — the same encryption used by militaries and banks. It would take billions of years to brute-force with current computing power.
VPN Protocols Compared
The protocol determines how data is encrypted and transmitted. This is the single biggest factor in VPN speed and security. Here's how the major protocols compare:
| Protocol | Speed | Security | Stability | Best For |
|---|---|---|---|---|
| WireGuard | ★★★★★ | ★★★★☆ | ★★★★★ | Daily use, streaming |
| NordLynx | ★★★★★ | ★★★★★ | ★★★★★ | NordVPN users (best overall) |
| Lightway | ★★★★★ | ★★★★☆ | ★★★★☆ | ExpressVPN users |
| OpenVPN | ★★★☆☆ | ★★★★★ | ★★★★☆ | Max security, older devices |
| IKEv2 | ★★★★☆ | ★★★★☆ | ★★★☆☆ | Mobile (fast reconnect) |
| PPTP | ★★★★★ | ★☆☆☆☆ | ★★★☆☆ | ⚠️ Avoid — broken encryption |
Bottom line: Use WireGuard (or NordLynx/Lightway if available). It's faster, lighter, and more auditable than OpenVPN. Only fall back to OpenVPN if WireGuard isn't supported on your device.
Speed: Real Numbers from Real Testing
We tested 5 VPNs from a 100 Mbps connection in Mexico City. Each test was repeated 10 times and averaged. All tests used the provider's fastest protocol.
NordVPN (NordLynx) and ExpressVPN (Lightway) were virtually tied. Surfshark was close behind. Proton VPN's free tier was notably slower, which is expected given server congestion. For the full NordVPN breakdown, see our in-depth NordVPN review.
What Should You Use a VPN For?
Not every situation needs a VPN. Here's when it genuinely helps — tap any card for details:
Is Using a VPN Legal?
VPNs are legal in most countries. The US, UK, Canada, Mexico, all of Europe, Japan, South Korea, Australia, and most of Latin America have no restrictions on VPN use. Using a VPN for illegal activities is still illegal — the VPN doesn't change that.
Countries where VPNs are restricted or banned: China (only government-approved VPNs), Russia (banned unapproved VPNs since 2017), Iran, North Korea, Turkmenistan, Belarus, Iraq, and Oman. In these countries, using an unapproved VPN can result in fines or worse.
If you're traveling to a restricted country, set up your VPN before you arrive. VPN provider websites are often blocked in these countries.
Free VPNs: Are They Worth It?
Most free VPNs are worse than no VPN. A 2024 study found that 72% of free VPN apps on Google Play contained trackers, and 38% contained malware. The business model is simple: if you're not paying for the product, you are the product.
The two exceptions worth considering:
Proton VPN Free — unlimited data, no ads, no logs. Swiss-based with strong privacy laws. Speed is slower (shared free servers) but it's genuinely private. Best free option, period.
Windscribe Free — 10GB/month, 10 server locations. Canadian company with a solid reputation. Good enough for occasional use.
For serious daily use, paid VPNs at $2–4/month (on 2-year plans) are dramatically better. The speed difference alone — 90+ Mbps vs 30-50 Mbps — makes streaming and video calls viable.
Which VPN Should You Buy?
After testing 12 VPNs over 90 days, here are our top picks by use case. Each link goes to our full review with speed tests and setup guides.