Technical audit · 29.05.2026

immobilienscout24.de

Germany's Largest Real Estate Portal

Germany's leading real estate portal. 83 requests, 17 domains. Next.js, CloudFront. MakeItBetter — a proprietary font, served locally. Google GSI and Tealium IQ fire before the Usercentrics banner. AWS WAF telemetry — undeclared. Set-Cookie — zero.

Request timeline

+0 ms · homepage
www.immobilienscout24.de/ — Next.js, CloudFront (HEL51). A link preload for four fonts is set in the response header.
+136 ms · fonts
MakeItBetter Regular and Bold (woff2) — IS24's own branded typeface, served locally from /_next/static/media/. No Google Fonts.
+148 ms · proprietary infrastructure
sso.immobilienscout24.de/static/one-tap/sso-one-tap.js — the SSO module. web.chatbot.immobilienscout24.de — the HeyImmo AI chatbot (LLM). www.static-immobilienscout24.de/web-metrics/main.js — proprietary metrics. tracking.immobilienscout24.de/tr.js — an internal page tracker.
+413 ms · Google GSI — before the banner
accounts.google.com/gsi/client, /gsi/style, /gsi/status (client_id=208472424340-…) — the Google Sign-In SDK loads and checks the authorization status. Before Usercentrics.
+609 ms · Tealium IQ — before the banner
tags-eu.tiqcdn.com/utag/immobilienscout/is24/prod/utag.js — the Tealium tag container, EU zone. Before Usercentrics.
+653 ms · Usercentrics TCF
app.usercentrics.eu/browser-ui/latest/loader.js — the CMP starts. The banner fully loads by +1884 ms (session/1px.png). GVL v3 (IAB TCF) loads in two languages. settingsId=Zj3Me6gb1.
+919 ms · AWS WAF SDK
82d925f87a91.edge.sdk.awswaf.com/challenge.js (304) and two /telemetry requests (+1541 ms, +2547 ms) — behavioral telemetry for bot detection.

Declared versus actual

✓ Usercentrics — declared as the Privacy Manager (CMP) — declared
✓ Google reCAPTCHA — declared for forms — declared
✓ HeyImmo (LLM chatbot) — declared, chat-data processing — declared
+ Google Sign-In / GSI (accounts.google.com) — not separately declared — not declared
+ Tealium IQ (tags-eu.tiqcdn.com) — not mentioned — not declared
+ AWS WAF SDK (82d925f87a91.edge.sdk.awswaf.com) — not mentioned — not declared

Transfer timings

+413 ms accounts.google.com

Google GSI / Sign-In SDK. Google Ireland Limited. Before the banner.

+609 ms tags-eu.tiqcdn.com

Tealium IQ. Tag Management. Not declared.

+1541 ms 82d925f87a91.edge.sdk.awswaf.com

AWS WAF telemetry. Amazon. Bot detection. Not declared.

Detected trackers

Context

ImmoScout24 is Germany’s leading real estate portal, part of Scout24 AG. Next.js, CloudFront (HEL51 region — Helsinki). HAR: 83 requests, 17 domains. Proprietary infrastructure: SSO, the HeyImmo AI chatbot, an internal page tracker, performance metrics.

Google GSI and Tealium IQ — before the banner

The Usercentrics loader appears at +653 ms. By that point, two external services have already run: Google GSI at +413 ms and Tealium IQ at +609 ms.

Google GSI (gsi/client, gsi/style, gsi/status) is the Google Sign-In SDK, providing sign-in via a Google account and the One Tap feature. Four requests to accounts.google.com, including gsi/status carrying client_id=208472424340-…, transmit browser and session data to Google’s servers without consent. The policy mentions Google only in the context of ReCaptcha; Google Sign-In is not described separately.

Tealium IQ (tags-eu.tiqcdn.com/utag/immobilienscout/is24/prod/utag.js) is a Tag Management System, EU zone. A tag container capable of activating additional trackers depending on the utag configuration. It is not mentioned in the privacy policy, either as Tealium or as “Tag Management.”

AWS WAF SDK — undeclared

82d925f87a91.edge.sdk.awswaf.com runs challenge.js (304, from cache) and sends telemetry twice — browser behavioral data for Amazon Web Services WAF bot detection. AWS WAF is not mentioned in the policy.

MakeItBetter — a proprietary typeface, local

IS24 uses its own MakeItBetter typeface (Regular, Bold) in woff2 format, from the Next.js directory. Four font files are preloaded in the HTTP response header. No Google Fonts.

Conclusion

www.immobilienscout24.de has three findings: Google GSI and Tealium IQ are active before the Usercentrics banner is displayed, and the AWS WAF SDK sends telemetry with no declaration in the policy. The proprietary infrastructure (SSO, chatbot, metrics) raises no concerns.

Evidence

How to verify: download the file and compute its checksum — sha256sum file.har (Linux, macOS) or certutil -hashfile file.har SHA256 (Windows); it must match the one shown. The conclusions apply to the scope of this measurement — see the limitations of the method.

Original (audit)
HAR file: de/immobilienscout24-de-2026-05-29.har
SHA-256: b2957a432f8b5004f4d36d2194ff8377d5ee5cda2fa6b81b59d86c43b7a33f47
Re-check snapshot
Awaiting changes
HAR files are stored on EU infrastructure (Proton Drive). SHA-256 is published for integrity verification.