Free OSINT Tools & Open-Source Intelligence Platform
A hands-on, continuously re-tested directory of the internet's best free OSINT tools — for domain recon, username search, breach checks, and image forensics. Every listing is installed and run by an analyst before it earns a place here.
Filter the Directory by Category
Eight investigation surfaces, from identity to infrastructure. Select one to filter the featured tools list below to exactly what you need.
Featured Free OSINT Tools
No marketing copy — just what each tool actually does well, where it breaks, and when we'd reach for it. Every entry below is a genuinely free OSINT tool or has a workable free tier.
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The Investigative Workflow We Actually Use
OSINT is a process, not a tool list. This is the six-step sequence we run on every investigation — scoping, passive collection, correlation, verification, authorized active recon, and reporting.
Built by People Who Actually Run These Tools
Disclosure:
Experience
Every tool is installed, configured, and run against real or synthetic targets before it is written up — not summarized from a landing page.
Expertise
Write-ups are grounded in actual investigative workflow: passive vs. active recon, false-positive handling, and evidentiary standards.
Authoritativeness
We link to primary sources — official repos, vendor docs, RFC-level references — instead of secondary blog posts repeating each other.
Trustworthiness
No paid placement, no affiliate ranking bias, and outdated or broken tools get flagged or removed on a rolling review schedule.
Our Testing Checklist
Install the free tier exactly as a first-time user would — no vendor-provided demo accounts. Run each tool against a controlled, consented target set to verify claimed capabilities. Document actual rate limits, false-positive patterns, and any signup friction. Cross-check every claim against the tool's own changelog or repository before publishing. Re-test on a rolling schedule; deprecated or broken tools are flagged within the listing, not silently left inaccurate.
OSINT Tools & Open-Source Intelligence — FAQ
Straight answers about legality, cost, and how this directory is put together.