This page aggregates measured, corroborated evidence: donors' iPhones recorded apps contacting this domain, every claim below was reported by separate accepted donations and published under a human verdict (later rows for an approved app inherit its verdict). A contact is a measurement, not an accusation — it does not show what data was sent.
otel-gw.booking.com
classified as first-party · 2
What our research panel found AI-drafted · human-reviewed
We ask several independent AI models the same question and publish their answers separately — cross-vendor agreement is evidence against fabrication, and disagreement is worth seeing. 3 of 3 models answered, overall confidence high. A human reviewed this domain's claims before anything here published.
Anthropic Claude — first-party
otel-gw.booking.com is a subdomain of booking.com, the app publisher's own domain, and the "otel" label most plausibly denotes an OpenTelemetry gateway used for first-party diagnostics/telemetry ingestion (inference from the hostname, not a confirmed ownership record beyond the parent domain). Any such flow is covered by the app's declared collection of Diagnostics, Crash logs, App interactions, and Device or other IDs.
OpenAI — first-party
The domain is a booking.com subdomain and therefore most likely first-party infrastructure for Booking.com. The app's label declares broad collection categories that could cover this contact; no specific undisclosed data flow is shown.
Google Gemini — first-party
The domain otel-gw.booking.com is a first-party subdomain owned by Booking.com, likely serving as an OpenTelemetry gateway for internal telemetry and diagnostics. The app explicitly discloses collecting diagnostics and app interactions, so this contact does not appear undisclosed.
Apps measured contacting this domain
| App | Label gap | Donations | Contacts | Seen |
|---|---|---|---|---|
| Booking.com: Hotels & Travel | — | 4 | 8 | 2026-07-28 → 2026-07-29 |
The corpus grows one report at a time: donate your App Privacy Report — anonymous by design.
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