OSINT Toolkit provides email and username lookup tools. Users enter a username or email to run general searches, social media searches and messaging app searches. The site notes that username and email results are an approximation, so negative results do not necessarily mean an account is not in use.
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Leak Lookup is a data breach search engine for searching database leaks and dumps. It offers username, email and IP address lookups across thousands of breaches to help track credentials compromised in the wild. A hash API provides hash-cracking capabilities and an API key is required to make requests.
OSINT framework for finding public information linked to phone numbers, emails, usernames, and other identifiers.
A Chrome extension that reverse-looks up a LinkedIn profile from an email address, returning the name, profile id, username and profile image if a match is found. It requires an active LinkedIn login session and allows up to 50 unique email addresses searched. Version 1.0 was published Sep 3, 2019.
Python package for finding Reddit accounts and related user information from usernames.
Twitter search tool for finding people and tweets by name, username, location, or topic.
Finds the numeric Instagram user ID behind a username or profile link.
Search tool for looking up Skype usernames, profiles, and related public account information.
Finds Telegram usernames and public profile listings using SocialFinder’s Telegram directory.
Intelligence X provides a collection of free open source intelligence (OSINT) and forensic tools for investigative use. The tools support lookups for emails, domains, IP addresses, Bitcoin addresses, images, usernames, people, phone numbers, locations, files, VINs, and hashes, alongside social media intelligence tools for Facebook, Twitter, LinkedIn, Telegram, and YouTube, plus AI-powered search features. All third-party lookup services open in pop-up tabs, and the provider disclaims responsibility for third-party service results.
OSINT tool for checking whether usernames or identities appear across Instagram and online services.