Instant Username Search is a free and open-source web app to check if a username is available on services like Facebook, Instagram, Reddit, GitHub and much more. It's available online or as a self-hosted app.

KnowEm is described as 'Search over 550 popular social networks, over 150 domain names, and the entire USPTO Trademark Database to instantly secure your brand on the internet' and is a Social Network in the social & communications category. There are six alternatives to KnowEm for Web-based and Self-Hosted. The best KnowEm alternative is Instant Username Search, which is both free and Open Source. Other great apps like KnowEm are Namechk, Gravatar, Chirp.blue and NameOyster.
Instant Username Search is a free and open-source web app to check if a username is available on services like Facebook, Instagram, Reddit, GitHub and much more. It's available online or as a self-hosted app.

Use Namechk to see if your desired username or vanity url is still available at dozens of popular Social Networking and Social Bookmarking websites. Promote your brand consistently by registering a username that is still available on the majority of the most popular sites.

An "avatar" is an image that represents you online—a little picture that appears next to your name when you interact with websites.
Elon Musk tweeted that Twitter is finally going to purge inactive accounts. This means that you can finally get your desired handle, but you have to be quick!

The global brands of today all seem to have catchy names yet for bootstrapped startups; these short names are expensive to invest in and hard to come by. But a brandable name is not necessarily a short name. Brandables are creative and sticky, but most of all, unique.

360username helps you find, check, and secure the same username across the internet. You can instantly search your preferred name across more than 90 platforms to see where it’s available.



