WhatsMyName
Community-maintained list of 700+ sites for username checks, with a free browser tool
ToolOSINT ToolsCloud, Open source
Pricing: Free. Dataset licensed CC BY-SA 4.0.
Reviewed by the Cyber Vendor Guide editorial team against the public sources cited below · Last reviewed September 2026 · How we review listings
What is WhatsMyName?
WhatsMyName is a community-maintained dataset of more than 700 websites and the rules for checking whether a username is registered on each, published under a Creative Commons BY-SA 4.0 licence. Other OSINT and digital-footprint tools build on it, and whatsmyname.app is a free browser-based tool built directly on the dataset that needs no installation. The project has been on GitHub since 2015.
Best for: Anyone who needs a quick, free username check, and developers who want a maintained list of sites to build on.
Pros
- Free to use in the browser with no installation
- Open dataset other tools can reuse
- Maintained by the community since 2015
Things to check
- Checks whether an account exists; it does not build a profile
- Coverage depends on community updates to the site rules
Reported in public reviews and vendor documentation. See sources below.
Key Features
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Sources & references
Where the information on this listing comes from. Always verify pricing and capabilities against the vendor before a purchasing decision.
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Key facts
- Pricing
- Free. Dataset licensed CC BY-SA 4.0.
- Model
- Free and open data
- Founded
- 2015
- Cloud
- Yes
- Self-hosted
- No
- Open source
- Yes
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