Signal is great, but Session takes "extreme" to another level. Session routes all traffic through the Loki Network (an onion routing network like Tor).
If you must use a free VPN, stick to the "Freemium" models of reputable companies like or PrivadoVPN . They offer a limited free version supported by their paying customers, ensuring they don't have to sell your data to keep the lights on. Summary Table: The Extreme Privacy Toolkit Best Free Tool Privacy Level Browsing Tor Browser Email Proton Mail Chat Search DuckDuckGo / SearXNG Passwords Final Thoughts extreme private com free best