StevenBlack/hosts
🔒 Consolidating and extending hosts files from several well-curated sources. Optionally pick extensions for porn, social media, and other categories.
What it does
This project maintains a continuously updated blocklist that prevents your devices from connecting to websites known for serving ads, malware, and other unwanted content — essentially a community-maintained blacklist for the internet. It works by updating a system-level file (called a 'hosts file') on your computer or network that redirects harmful or unwanted web addresses to nowhere, blocking them before they ever load.
Why it matters for PMs
With nearly 30,000 stars on GitHub, this project signals massive consumer demand for privacy and ad-blocking solutions — a market dynamic that every product team building anything ad-supported or data-driven needs to account for. For founders and investors, it also highlights the growing opportunity in privacy-first infrastructure, where open-source community tools are increasingly replacing paid security software.
Early stage — limited signal data
Score updated Feb 18, 2026
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