Open-source intelligence, or OSINT, is intelligence developed from publicly or commercially available information to answer a specific question. Finding a webpage is collection. Assessing its reliability, connecting it with other evidence and explaining what it means is the intelligence work.
The U.S. Intelligence Community's OSINT strategy ties the discipline to specific intelligence priorities, requirements or gaps. Open source does not mean open-source software, and it does not mean every useful source is free.
What sources can OSINT include?
Sources can include company websites, public social posts, news reports, business records, public code repositories and commercially available databases. Intelligence.gov also describes broadcast media, videos and other publicly available materials as open-source inputs.
Technical records can help answer narrower questions. For example, ICANN's Registration Data Access Protocol provides access to domain registration data. A record's availability does not make it complete or prove who operates the associated website.
Keep the source, collection time and original context with each finding. A screenshot without its URL or date is harder to evaluate later.
How do attackers use public information?
MITRE ATT&CK's reconnaissance guidance describes adversaries searching open websites for information about potential targets. Public roles, business relationships and company activity can help an impersonator make a message appear familiar.
That does not make public communication inherently unsafe. It means security teams should understand what outsiders can learn and prepare verification processes that do not rely on a convincing name, logo or job title.
How do defenders use OSINT?
Defenders use public evidence to investigate suspicious domains, accounts and affiliation claims. It can help establish a legitimate brand's online presence and identify differences that warrant closer review.
Consider an illustrative example, not a customer case. A support profile uses your company's logo and links to an unfamiliar domain. Your team compares it with official accounts, checks the site's claims and reviews available registration records.
The result should explain what was observed, what remains unknown and which team should act. A copied logo alone is not proof of an attack; an authorized partner might use it too.
What makes an OSINT finding reliable?
Check the original source and whether information is current. Multiple pages repeating one claim are not necessarily independent confirmation. Separate observations from assumptions, and record conflicting evidence rather than hiding it.
Shared infrastructure can suggest a relationship, but it does not automatically establish common ownership. An analyst should state the strength and limits of the connection.
Publicly accessible information can still raise privacy, licensing and handling concerns. The IC strategy explicitly includes privacy and civil-liberties protections. Enterprise investigations need appropriate access, retention and sharing rules rather than treating availability as unrestricted permission.
Where does Outtake fit?
Outtake Recon Agent describes tracing a threat signal through ownership, hosting and infrastructure relationships. That can help a security team examine the operation behind an impersonating asset, with conclusions still tied to the available evidence.
For the monitoring layer, read What is brand monitoring?. OSINT adds context to a finding; investigation and response still need a defined question and an accountable owner.
Sources
- IC OSINT Strategy 2024-2026.
- Intelligence.gov collection overview.
- MITRE ATT&CK T1593.
- ICANN RDAP overview.
- Outtake Recon Agent.
Reviewed October 2, 2026.