Multiple Platforms

Name	Description	Cost	Tool Review and Guide
Blackbird	Check usernames and email addresses on websites and social networks	Free	https://bellingcat.gitbook.io/toolkit/more/all-tools/blackbird
Have I Been Pwned?	Does an email or a phone number appear in data breaches?	Free	https://bellingcat.gitbook.io/toolkit/more/all-tools/have-i-been-pwned
holehe	holehe allows you to check if the mail is used on different sites like twitter, instagram and will retrieve information on sites with the forgotten password function.	Free	Guide not available https://github.com/megadose/holehe
Intelx.io	Find user details in data breaches	Partially Free	https://bellingcat.gitbook.io/toolkit/more/all-tools/intelx.io
Namechk	A username and domain search tool that checks on which platforms or domain a given username is registered.	Free	https://bellingcat.gitbook.io/toolkit/more/all-tools/namechk
Open Measures	Open Measures helps open source researchers investigate harmful online activity such as extremism and disinformation.	Partially Free	https://bellingcat.gitbook.io/toolkit/more/all-tools/open-measures
Sherlock	Check usernames across more than 400 websites and social networks.	Free	https://bellingcat.gitbook.io/toolkit/more/all-tools/sherlock
Skopenow	Social Media Investigations - name, phone, email, username searches	Paid	https://bellingcat.gitbook.io/toolkit/more/all-tools/skopenow
Social-searcher	Search hashtags and usernames across various platforms.	Partially Free	Guide not available https://www.social-searcher.com/
WhatsMyName	Search for usernames on several hundred platforms	Free	https://bellingcat.gitbook.io/toolkit/more/all-tools/whats-my-name