Privacy Heroes is described as 'Every week there’s more bad news about the Internet: massive data breaches, privacy scandals, and unwarranted government surveillance, to name a few recurring themes' and is an website in the Security & Privacy category. There are more than 25 alternatives to Privacy Heroes, not only websites but also apps for Mac, Windows and Linux. The best alternative is AlternativeTo, which is free. Other great sites and apps similar to Privacy Heroes are PrivacyTools (Free, Open Source), PRISM Break (Free, Open Source), alternative.me (Free) and Riseup (Free).
AlternativeTo let you find new Windows, Mac, Linux, online and mobile software based on applications you already know instead of useless categories. AlternativeTo is a new approach to finding good software.
You are being watched. Private and state-sponsored organizations are monitoring and recording your online activities. PrivacyTools (also known as privacytools.io) provides knowledge and tools to protect your privacy against global mass surveillance.
Riseup is an organization which provides online communication tools for people and groups working on liberatory social change. To create democratic alternatives & practice self-determination by controlling our own secure means of communications.
When I am exploring alternatives to a product or service, I often to go Google, type "[product] vs ", and just see what it autocompletes. That usually tells me the most popular competitors. If I want to be thorough I'll do the same for the competitors, etc.