LeakHound
A consumer privacy tool that continuously audits your VPN connection — DNS, WebRTC, IPv6, and IP reputation — and flags providers (including ones in public leak lists) that put your real identity at risk.
Privacy-conscious consumers, journalists, and remote workers who rely on VPN services to protect their identity
- One-tap leak audit covering DNS, WebRTC, IPv6, geolocation, and blacklisted-IP status
- Crowd-sourced scorecard of VPNs with documented leak history, refreshed from public reporting
- Per-app VPN routing recommendations so your real IP only leaks when you want it to
- Background monitoring with push alerts the moment your VPN drops or your real IP becomes visible
Public GitHub repos collecting Russian VPN IPs show this is an active, ongoing leak problem; VPN adoption exploded during remote work and remains high; mainstream VPN reviews don't actually verify leak resistance.
Multiple free VPN leak test tools actively published (vpntesting.com, proprivacy.com, vpnmentor.com, my-ip.me) and PCMag/Cloudwards still actively cover VPNs, indicating sustained interest; but most users do occasional rather than continuous checks, capping ongoing demand.Free VPN Leak Test: IP, DNS & WebRTC - No Signup ↗VPN Leak Testing Tool | IPv4, IPv6, DNS & WebRTC - ProPrivacy.com ↗
Space is crowded with free, well-known leak checkers (vpnmentor, proprivacy, samnet.dev, ip-lookup.net) and business VPN monitoring tools on SourceForge; continuous-auditing + IP-reputation cross-reference offers some differentiation but not a wide-open lane.The Top 15 Best VPN Monitoring Tools in 2026 ↗VPN Leak Check — Public IP, DNS, WebRTC, IPv6 ↗
Dominant pattern is free ad/affiliate-supported tools (vpntesting.com explicitly 'No Signup', most competitors free), which sets consumer willingness-to-pay low; privacy premiums exist in research but this narrow utility struggles against established free alternatives.Free VPN Leak Test: IP, DNS & WebRTC - No Signup ↗Consumer Willingness to Pay for Privacy Features - PureVPN ↗
DNS/WebRTC/IPv6 leak classes are persistent protocol-level issues and VPN usage remains entrenched (PCMag 2026 VPN reviews still active); however, VPN clients are gradually auto-hardening against these leaks, which could erode the problem over time.The Best VPN Services for 2026 ↗
Technically straightforward MVP: query public IP endpoints, resolve DNS over multiple resolvers, enumerate WebRTC candidates via browser APIs, test IPv6 connectivity, and cross-check against IP reputation feeds — feasible as a browser extension or lightweight desktop app.VPN Leak Check — Public IP, DNS, WebRTC, IPv6 ↗