Security, with a verdict on each.
Finding leaked credentials, testing your own applications, and blocking the traffic that should not reach them.
These supplement a real audit; none of them satisfies a customer who has asked for one.
Moving fastest this week: shannon (+1.0k), pentagi (+752), SkillSpector (+659).
Adopt now
6Mature enough to put in production this quarter.
Secrets scanner for Git repos
Instead of: Manual secret auditing
Finds leaked credentials in code
Instead of: Manual credential audits
Daemon to ban hosts with multiple auth errors
Instead of: Manual IP blocking
Cloud security auditing tool
Instead of: Manual security audits or paid tools
Security auditing tool for Linux and UNIX
Instead of: Manual security audits
Loads env vars from .env files
Instead of: Manual env var setup
Pilot it
7Worth a timeboxed spike before you bet on it.
AI security scanner for agent skills
Instead of: Manual security reviews of AI code
An autonomous agent that tests your own web application for security holes and writes up what it finds.
Instead of: A four-figure penetration-testing engagement, or shipping untested.
Open source security platform for endpoint and cloud protection
Instead of: Splunk or manual log analysis
OSINT tool for website analysis
Instead of: manual website reconnaissance
Windows user mode debugger
Instead of: paid debuggers like IDA Pro
Fast port scanner written in Rust
Instead of: Nmap or manual port checks
Intranet vulnerability scanner
Instead of: Manual vulnerability checks
Watch, or skip
2Real software; just not where a small team's next hundred hours should go.
AI-powered penetration testing tool
Instead of: manual pen testing or paid tools
Open-source secrets and access management
Instead of: Manual secrets management or paid tools like Hashicorp Vault
Security, in short
- What are the best open source security tools for small teams right now?
- We would put gitleaks, trufflehog, fail2ban into production this quarter. gitleaks — Secrets scanner for Git repos The full list below ranks 15 by momentum, size and how recently they shipped.
- Which of these can I use in a commercial product?
- 7 of the 15 carry a permissive licence (MIT, Apache-2.0, BSD). 8 do not — shannon (AGPL-3.0), trufflehog (AGPL-3.0), wazuh (Custom / check the LICENSE file) and others. Copyleft and source-available licences carry obligations when you ship them inside something you sell. Read the LICENSE file; this is a reading of the label, not legal advice.
- How is this list ranked?
- By real week-over-week star movement first, with a size floor so an established tool is not buried by a two-week-old project, and a hard penalty for anything that has stopped shipping. Verdicts are an editorial call for a team of 2-20 with limited engineering hours — not a judgement on the software, and not the same call we would make for a lab.
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