Trust model
Observed, evidenced, and bounded.
TechStack Radar reports what is publicly observable from a safe HTTP observation. It does not claim knowledge of a company’s private infrastructure.
Confidence
HIGH
90–100: direct or highly specific public fingerprint.
MEDIUM
70–89: strong heuristic or corroborated evidence.
LOW
50–69: diagnostic only; cannot create public change events.
V1 signal contract
HeadersCookiesHTML/metaReferenced asset URLs
No DNS-derived technology inference. No exploit probes. No browser execution. No recursive crawl. No third-party asset fetch.
Change confirmation
The first successful observation is BASELINE. A new technology requires two successful observations to become ADDED. A stable technology must be absent twice before REMOVED. Failed observations never produce removals. Detector and corpus versions are preserved on each observation.