Cybersecurity Open Source Tools

Alternative toiVerify

Mobile forensics toolkit for detecting spyware on Android and iOS

• 15,490 GitHub stars
• CustomLicence MVT License 1.1

Alternative toCloudflare

Community-powered threat detection and IP blocklist

• 15,226 GitHub stars
• MITLicence MIT
• #Security

Alternative toAuth0

Multi-tenant auth platform with SSO, RBAC, and social login

• 14,731 GitHub stars
• MPL-2.0Licence MPL-2.0

Alternative toGoogle Chrome

Open source browser from Mozilla with privacy by default

• 13,537 GitHub stars

InSecurity & Monitoring

Real-time OSINT map: aircraft, ships, CCTV, satellites, self-hosted.

• 11,344 GitHub stars
• AGPL-3.0Licence AGPL-3.0

Alternative toMaltego

Self-hosted graph tool for OSINT and cybersecurity investigations

• 9,878 GitHub stars
• Apache-2.0Licence Apache-2.0

Alternative toTeamSpeak

Free open source low-latency voice chat for gaming teams

• 8,351 GitHub stars
• BSD-2-ClauseLicence BSD-2-Clause
• #Chat

Alternative toNodeZero by Horizon3.ai

78 offensive security skills for Claude, drop-in and MIT licensed

• 7,609 GitHub stars
• MITLicence MIT

Alternative toBrave Browser

Privacy-focused browser engineered for speed and user control

• 6,380 GitHub stars
• MPL-2.0Licence MPL-2.0

Alternative to1Password

Open source team password manager with sharing and audit

• 6,180 GitHub stars
• AGPL-3.0Licence AGPL-3.0
• #Security