The Best NetGuard Alternatives in 2026

Search mobile app metadata and inspect security scores with BeVigil’s mobile app security engine.

BeVigil scans mobile apps and provides security scores based on its indexed app data.

Scan TCP ports with masscan, an asynchronous scanner designed for large network ranges.

Scan applications, APIs, networks, DNS, and cloud configurations for vulnerabilities using Nuclei.

Karma Firewall is an Android firewall that states it requires no internet permission and intercepts no allowed user traffic.

Spur analyzes internet infrastructure and network signals to help investigators interpret obfuscated connections.

Manage Windows Firewall rules and receive outbound connection notifications with Windows Firewall Control.

Anubis weighs incoming HTTP requests to help block AI crawlers before they access a website.

Manage Android firewall rules with AFWall+, an iptables-based firewall app.

The action firewall for AI agents. Enforce policy and human approval before risky tool calls, shell commands, workflows, and production changes, with auditable evidence.

Set network rules by application or globally with Fort Firewall for Windows.

ClawMoat helps guard AI agents against data leaks, unsafe tool use, and poisoned dependencies through an open-source firewall.

Manage two-factor authentication codes with OTP Auth, an iOS app listed on the App Store.

Manage two-step verification tokens on Android with Aegis Authenticator, a free, open-source app.

Inspect and reverse engineer Android application packages using the Apktool utility.

Generate secure SSL configurations for selected web, database, and mail software.

Kali NetHunter App Store provides an installable catalog of applications for the Kali NetHunter platform.

GNUnet provides tools for decentralized communication through a secure peer-to-peer networking framework.

Explore a map of connected devices and sensors, including environmental, weather, earthquake, wildlife, and vessel data.

Solve reverse engineering challenges published on challenges.re, a challenge-focused site.

GoPlus offers Web3 security tools including audits, APIs, a user security hub, and a browser extension.

Search the National Vulnerability Database, a public resource for vulnerability information.

View Toronto Police calls for service on a map that updates in real time, according to the supplied page description.

Add proof-of-work verification to websites with mCaptcha, a privacy-focused automated CAPTCHA system.