> [!info] > Input: [[Face|face picture]], [[Voice|voice pattern]] > Output: [[Social Media Account|account]] > > Types: [[Behavioural Weakness|behavioural]] > Weakness: [[SOWEL-3. Creating Content]] > Functionality: [[SOFL-9. Search]] ### Explanation When you already have biometric material — a face crop, a short voice clip, occasionally a fingerprint or iris scan — and you want to find the account or person it belongs to, you query a reverse-biometric search engine. The face case is the practically tractable one: several commercial engines (PimEyes, FaceCheck.id, Search4Faces, FindClone) index hundreds of millions of public images from social media, news, leaks, escort sites and other corners of the open web, and return profile hits for an uploaded query. Voice search is far less mature but starting to appear in research tooling; iris and fingerprint search are essentially limited to law-enforcement databases. Each engine indexes a different slice of the web — PimEyes leans Western social and news, FindClone is strong on VK and the Russian-speaking internet, Search4Faces covers VK plus Russian dating sites, FaceCheck.id has a broader leak and news corpus. Use several engines in parallel and treat results as candidates to verify, not as answers: false positives are common, especially with low-resolution input, with distinctive accessories that may bias the model, or with targets whose features are very common. Be aware of jurisdictional and access limits — PimEyes is restricted or blocked in several EU member states, FindClone requires payment in roubles, and most engines impose rate limits or paywalls past a few free searches per day. Combine reverse-face results with [[SOTL-7.4. Conduct Reverse Image Search]] for context that pure face-matching misses (background, surrounding objects, page where the image was published). ### Examples {{some links to articles, videos, etc}} ### Tools - [PimEyes](https://pimeyes.com/) — Western-leaning face search; paid past the first few queries - [FaceCheck.id](https://facecheck.id/) — face search with broader leak/news/dark-web corpus - [Search4Faces](https://search4faces.com/) — VK and Russian-speaking dating sites - [FindClone](https://findclone.ru/) — VK-focused; subscription required, payment in roubles - [Lenso.ai](https://lenso.ai/) — newer face-search engine with its own crawl ### See also - [[SOTL-3.7. Collect Biometric Data from Account]]