TOR, the Onion Router, is an open source product/service (which means it’s free) that’s been around since the mid 1990s. TOR protects users against a common form of internet surveillance known as traffic analysis. I2P, founded in 2003, is a free, open source, worldwide privacy network for secure communications. Private Tunnel masks users’ public IP addresses, so they can surf the web anonymously, and shield their networks against cyber-attacks and stalkers. NordVPN is used to ensure that all information shared over the internet is encrypted and private.”]
Source: https://www.csoonline.com/article/3213931/top-5-tools-to-protect-internet-privacy.html