WhatsMyName AppCheck username availability and presence across hundreds of websites in seconds.

4.5 (4)

Reviewed by Daniel Nikulshyn·Updated July 2026

OSINT Open Source Security Research Username Lookup Investigation Free Privacy

Overview

WhatsMyName App is a username enumeration tool that searches for the presence of a given username across hundreds of social media platforms, forums, and online services. By querying each site and analyzing the responses, it quickly reveals where a specific handle is in use or still available. Commonly used by OSINT investigators, security researchers, and journalists, the tool helps map an individual's digital footprint across the web. It is also useful for personal branding, allowing creators and businesses to find consistent usernames across platforms before signing up. The project is open source and maintained as part of broader OSINT resources, with a regularly updated list of supported sites and detection rules contributed by the community.

Key features

Username lookup across hundreds of platforms
Direct links to detected profile pages
Regularly updated detection rules
Open-source codebase with community contributions
Browser-based and CLI-friendly workflows
Useful for OSINT investigations and digital footprint mapping

Pricing

Model: Free
Category: Tool Libraries
Rating: 4.5 / 5 (4)

Use cases

OSINT Investigations

Investigators and researchers can map a subject's digital footprint by discovering accounts tied to a username across hundreds of social media platforms and online services.

Personal Branding Username Check

Creators and businesses can verify availability of a consistent handle across platforms before signing up, ensuring a unified online identity.

Journalism and Source Verification

Journalists can corroborate online identities and uncover related profiles to support reporting and verify sources during research.

Security and Threat Research

Security professionals can trace usernames linked to suspicious activity across forums and social networks to build profiles for incident analysis.

Pros & Cons

Pros

Covers hundreds of websites in a single search
Free and open source
Useful for both OSINT and personal branding
Community-maintained site list stays current

Cons

Results may include false positives or negatives
Web interface offers limited filtering options
Not designed for bulk or automated enterprise use

Reviews

4.5

Average from 4 ratings.

Mei-Ling Wong

Dec 10, 2025

Skeptical, then convinced

I went in skeptical — most tools in this space overpromise. It actually delivers on direct links to detected profile pages, and useful for both OSINT and personal branding caught me off guard. Not designed for bulk or automated enterprise use is why this isn't a perfect score, still, I'd recommend giving it a real trial.

Omar Haddad

Aug 20, 2025

Compared a few options

Evaluated this against two competitors. Where it wins: useful for OSINT investigations and digital footprint mapping and covers hundreds of websites in a single search. Where it lags: web interface offers limited filtering options. On balance the feature set — especially useful for OSINT investigations and digital footprint mapping — justifies the 5 stars for our use case.

Esther Adeyemi

Jul 29, 2025

Solid for our team

We rolled this out across the team last quarter and free and open source. Useful for OSINT investigations and digital footprint mapping fits neatly into how we already work, and username lookup across hundreds of platforms removed a step we used to do by hand. Not designed for bulk or automated enterprise use, which is the main caveat, but it has held up under daily use.

Devin Walker

Jun 7, 2025

Compared a few options

Evaluated this against two competitors. Where it wins: browser-based and CLI-friendly workflows and covers hundreds of websites in a single search. Where it lags: web interface offers limited filtering options. On balance the feature set — especially direct links to detected profile pages — justifies the 4 stars for our use case.