No. 7 of 65 ·Internet Filtering Software

WindowsSpyBlocker

Windows

Freedom report

Two barsScore 6.3

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

WindowsSpyBlocker is ranked #7 of 65 in internet filtering software on Freedom251. It runs on Windows. There is a free plan.

WindowsSpyBlocker plans and pricing

All plans

Free and open source Free Free and open source crazymax.dev · 5 Oct 2026

Compared on internet filtering software

Free plan: Yes
Platform support: Windows

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The record

Purpose: WindowsSpyBlocker is a Go application delivered as a single executable to block spying and tracking on Windows systems.
How it works: The project captures and interprets network traffic, then creates rules based on interactions between services and traffic sources or destinations.
Project components: The project includes blocking rules for Windows telemetry and data collection, plus an application that applies rules to the Windows firewall.
Firewall controls: The application can apply, display, or remove WindowsSpyBlocker network rules in the Windows firewall.
Hosts rules: The project provides spy, update, and extra hosts blocklists, with separate IPv6 list files.
Downloads: The executable is available through GitHub releases, Chocolatey, and Scoop; the package managers support automatic updates.
Integrations: The project documents blocking-rule formats for Windows firewall, hosts, DNSCrypt, ESET Firewall, Kaspersky Firewall, OpenWrt, Proxifier, and simplewall.
Security checks: The FAQ says releases are scanned by VirusTotal and links to a scan in each release description.
Potential compatibility issue: The FAQ says firewall or hosts rules may need to be removed if Windows Update cannot connect.
License: The project is licensed under the MIT license.
Support: Users can raise issues, contribute changes, sponsor the project on GitHub, or donate through PayPal.
Release recency: The changelog lists version 4.39.0 dated May 16, 2022 as its newest listed release.
Price from: Free

Where it ranks on Freedom251

Best Internet Filtering Software in 2026#7 of 65

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Sources

crazymax.dev/WindowsSpyBlocker/· checked 5 Oct 2026
crazymax.dev/WindowsSpyBlocker/usage/· checked 5 Oct 2026
crazymax.dev/WindowsSpyBlocker/app/telemetry/firewal· checked 5 Oct 2026
crazymax.dev/WindowsSpyBlocker/blocking-rules/hosts/· checked 5 Oct 2026
crazymax.dev/WindowsSpyBlocker/download/· checked 5 Oct 2026
crazymax.dev/WindowsSpyBlocker/faq/· checked 5 Oct 2026
crazymax.dev/WindowsSpyBlocker/donate/· checked 5 Oct 2026
crazymax.dev/WindowsSpyBlocker/changelog/· checked 5 Oct 2026