Site Behavior Lab
The facts below are what the maker publishes about Site Behavior Lab, checked and dated. Our editors have not written about it yet.
The facts
Each one read from Site Behavior Lab's own pages, with the date it was checked.
What it does
- Accounts and data sharing
- The reference site has no accounts, sign-ups, or passwords, and it does not sell, rent, or share scan data with data brokers.checked 14 Nov 2026
- Blocking simulation
- The Brave Shields comparison simulates list blocking in the scanner and is not a live Brave-browser visit.checked 14 Nov 2026
- Brave-list simulation
- One comparison is a normal visit against a visit that actively blocks with Brave's ad-block engine and default Shields lists, and it is not a live Brave-browser visit.checked 14 Nov 2026
- Comparison modes
- Comparison modes run two visits, and consent mode tries to click Accept all on one visit and Reject all on the other.checked 14 Nov 2026
- Corpus refresh
- Featured-site rescans are disabled as of 2026-11-14, so the committed corpus is not being refreshed.checked 14 Nov 2026
- Data minimization
- Scan submissions strip query strings and fragments, and stored reports omit them; reports are not linked to user identity or IP address.checked 14 Nov 2026
- Detector accuracy
- No detector in this release has a published precision or recall.checked 14 Nov 2026
- Intended audience
- The project is for people seeking checkable evidence about website behavior, including researchers using its dated, versioned corpus.checked 14 Nov 2026
- Not a legal verdict
- A report is investigative evidence that requires independent corroboration and is not a standalone legal determination.checked 14 Nov 2026
- Open source
- The scanner, catalogs, detectors, and site are open source under AGPL-3.0-or-later.checked 14 Nov 2026
- Public scan quota
- The public instance allows 6 scan tokens per minute and 120 per day per client, and a comparison or after-scrolling check costs two tokens.checked 14 Nov 2026
- Purpose
- Site Behavior Lab visits public websites with a controlled browser, records bounded evidence, and publishes reports rather than ratings.checked 14 Nov 2026
- Recorded evidence
- Evidence may include network requests, catalog labels, privacy-filtered cookie and storage snapshots, browser API signals, ad-pixel events, DNS CNAME findings, and policy cross-checks.checked 14 Nov 2026
- Recording cap
- Each visit records at most 1,000 requests, and an after-scrolling check may send up to 500 more that are not saved.checked 14 Nov 2026
- Report limits
- Results describe bounded visits and may be incomplete; counts are lower bounds, and some browser activity is unsupported or unrecorded.checked 14 Nov 2026
- Retention
- The privacy page states reference-deployment reports are automatically deleted after about seven days, configurable by instance operators.checked 14 Nov 2026
- Scanner
- The scanner runs a controlled headless Chromium visit and records requests, cookies, service-catalog matches, and browser signals.checked 14 Nov 2026
- Security contact
- The project is volunteer-maintained and aims to acknowledge vulnerability reports within a few days.checked 14 Nov 2026
- Security reporting
- The project asks users to report vulnerabilities privately through GitHub's private reporting channel.checked 14 Nov 2026
- Self-hosting
- The supported scanner is a Node/Playwright container built from the project's Dockerfile.checked 14 Nov 2026
- Service catalog
- Report labels come from 146 maintainer-reviewed domain mappings that are maintained in the repository and do not import a competitor tracker dataset.checked 14 Nov 2026
- Share retention
- The public instance keeps saved reports for seven days or 500 reports, whichever prunes first.checked 14 Nov 2026
- Support and corrections
- Users can report incorrect reports for correction through an append-only corrections ledger.checked 14 Nov 2026
The company
- Founded
- 2026checked 19 Oct 2026
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