Blackbirdgithub.com
Fast username and email lookup across 600+ sites using the WhatsMyName dataset, with PDF/CSV export and optional AI-generated profile summaries.
usernameemaildetails
tools / socialscan
socialscan
Checks whether a username or email is registered on major platforms (Instagram, X, GitHub, Snapchat, etc.) using signup/reset endpoints for accurate results.
freeosscli
field note
It covers fewer sites but has fewer false positives than broad checkers, because it uses each platform's own availability endpoints. Good for confirming hits.
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Lightweight Python tool that finds profiles by username across 350+ sites in a few seconds using async requests.
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