HackCheck
FreemiumWeb app / API
Searches billions of breach records by email, username, password, or other identifiers and shows which leaks contain the query.
Setup
Some setup OSINT resources
11 resources
Needs an account, a short install, or a bit of configuration.
Gem Gem 
IntelBase
FreemiumWeb app / API
Turns an email into a digital footprint: registered accounts, profile details, breach hits, and infostealer-log exposure, with a timeline of activity.
Shodan
FreemiumWeb app / API
Search engine for internet-connected devices that shows the open ports, running services, and banners for a host or IP.
Sherlock
FreeCLI
Command-line tool that checks a username against hundreds of social networks and reports where an account with that name exists.
Intelligence X
FreemiumWeb app / API
Search engine for leaked data, the dark web, and historical pages, with results kept in a long-term archive.
PhoneInfoga
FreeCLI
Command-line framework that checks an international phone number and gathers its country, carrier, line type, and online footprint.
Holehe
FreeCLI
Command-line tool that checks whether an email is registered on 120+ sites using their signup and forgotten-password flows.
OSINT Industries
PaidWeb app / API
Takes an email, phone number, username, name, or crypto wallet and returns linked accounts and profile data from a large set of online services.
Truecaller
FreemiumWeb app / Mobile app
Reverse phone lookup and caller ID that returns the name and spam reputation reported for a number.
Blackbird
FreeCLI
Command-line tool that searches a username or email across 600+ sites and can export the matched accounts to PDF or CSV.
LoL-Archiver OSINT
FreemiumWeb app
Runs reverse email, phone, username, and name lookups across 500+ networks and returns the linked accounts it finds.
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