Free KnowEm alternative: username search on 3,450+ sites
KnowEm (knowem.com) checks a name on social networks, with paid sign-up services. We don't run it. FreeUsername is a separate free tool: type a username below and check 3,450+ sites at once. Use it as a username checker, a social media username lookup or a way to find someone's accounts by username.
Free, right here in your browser.
Username ideas
Type a few words about you. Get names that fit the rules of Instagram, TikTok, Roblox, Discord and 20+ more platforms, and you can check any of them in one click. Open the full username generator.
Example for "night owl coffee" (Creator, Any site). Type your own words above. These are not checked yet: press Check to see where an idea is already taken.
- owl_createsCheck
- coffeemediaCheck
- coffee_studioCheck
- nightowlCheck
- coffeedailyCheck
- nightcoffeeCheck
- theowl_tvCheck
- owlcoffeeCheck
3,450+ sites. One search.
See all supported sites- X
- TikTok
- YouTube
- Snapchat
- Threads
- Bluesky
- Twitch
- Discord
- GitHub
- Spotify
- Medium
- Patreon
- SoundCloud
- Telegram
- Steam
- Tumblr
- Substack
- Etsy
- Vimeo
- Flickr
- Behance
- Dribbble
- DeviantArt
- Chess.com
- Duolingo
- GitLab
- Kaggle
- LeetCode
- Letterboxd
- Last.fm
- Linktree
- Ko-fi
- Keybase
- Hacker News
- Quora
- Imgur
- itch.io
- Bandcamp
- npm
- Wattpad
- Roblox
- Venmo
How it works
- 1You type a username, or paste a profile link.
- 2Our server asks each site for that profile address, 16 batches at a time.
- 3Results land as they come in: found, not found, blocked or unknown.
Private by default
The username is used only to run the check. We don't store it or log it.
Use it responsibly
Results are leads to verify, not facts about a person. Look up only usernames you have a legitimate reason to research.
3,450+
sites in one search, with results in seconds
Our own engine
Every site is checked with detection rules we write and test ourselves.
10 languages
- English
- العربية
- Español
- Français
- Deutsch
- Português
- हिन्दी
- Bahasa Indonesia
- Türkçe
- Русский
FreeUsername vs KnowEm
| Feature | KnowEm | FreeUsername |
|---|---|---|
| Status (October 2026) | Domain does not resolve | Online and free |
| Social sites | 500+ (per its archived homepage) | 3,450+ sites, on our own engine (WhatsMyName data plus sites we add) |
| Domains | 150+ domain names (archived) | .com, .net, .org, .io, .us, .app and .dev through public RDAP |
| Trademarks | US trademark database (archived) | No trademark check |
| Profile registration service | Paid packages from $84.95 (archived) | No. We only check |
| Export | Not confirmed | JSON and CSV (no PDF) |
| Price of a check | Free basic search (archived) | Free, no sign-up |
When KnowEm is the better pick
KnowEm suited brands and agencies that wanted a name checked and then claimed for them on hundreds of sites. With the site offline, a free username checker plus a direct trademark search covers the checking part.
Read our full KnowEm review, with how it works, pros and cons. Last reviewed 2026-10-18.
FreeUsername is independent and not affiliated with or endorsed by KnowEm. Details about KnowEm come from its public pages and may change; check its site for current features.
What this username search engine does
FreeUsername checks one username against 3,450+ public websites at the same time and shows you, live, where a profile with that exact name exists. It covers social networks, coding sites, gaming platforms, music and video services, forums, shopping sites and more (see all supported sites). Type a handle, or a nickname someone actually uses online, and it finds the public profiles that use it. People use it in two ways:
- Find accounts by username. Use it as a username finder or screen name search: look up one handle to find other accounts with that username. Audit your own digital footprint, find old accounts you forgot about, or, for legitimate research, see where a username appears in public. Our digital footprint check and OSINT username search guides show how to do this well, and our screen name search guide explains how to read the results.
- Check if a username is available. Before you launch a brand, channel or gamer tag, see where the name is already taken and where it is still free, plus whether the matching .com, .net, .org, .io, .us, .app and .dev domains are open. The name checker checks a name on social media and as a domain, side by side.
- Search dating sites by username. The scan includes dating sites, so a dating site username search shows where a match's handle also appears. Our guide to checking a match is real shows what to look for.
It is free, needs no account, and works in any modern browser on desktop or phone. If you want the best free username search for your needs, compare how many sites each tool checks: this deep username search is free, and one social media username search covers 3,450+ sites. Coming from IDCrawl username search? See our IDCrawl alternatives.
Looking for the WhatsMyName app or WhatsMyName username search from WhatsMyName Apps? FreeUsername is the new name of that site and its Android app, with the same free search.
In our October 2026 test of 60 usernames across 3,166 sites, a random made-up handle already existed on about 7 sites on average, while common names like johndoe existed on 866. See the study.
How to search by username in 4 steps
- Type a username in the box above, or paste a profile link and we pull the username out of it. You can search usernames in batches of up to 5, separated by commas.
- Optional: pick categories such as social, gaming or coding to narrow the scan.
- Watch results stream in. About 16 checks run in parallel, so most of the scan finishes in under a minute.
- Review, filter and export. Switch between grid, list and table views, filter by status, open any profile, then export everything to JSON or CSV or copy all found links.
The step-by-step guide has screenshots of every option.
What the results mean
Every site gets one of four statuses. Most checkers show only “taken” or “available”, which hides the cases where the check itself failed.
| Status | What it means | What to do |
|---|---|---|
| Found | A public profile page exists at that site’s address for this username. | Open it and confirm it is the account you expect. |
| Not found | The site reported no profile with that name. | The name is probably free there; confirm on the site’s sign-up page. |
| Blocked | The site refused our automated check (rate limits, bot protection or a login wall). | Unknown either way. Retry later or check by hand. |
| Unknown | The response was ambiguous or timed out. | Press Retry failed, or check that site directly. |
For found profiles we also show the public display name, avatar and bio when the site provides them, so you can compare accounts without opening each one. That is what we mean by a deep username search. Starting from a handle and asking where else it is used is a reverse username lookup. How it works lists what our server requests and why a result can be wrong.
Treat a match as a lead
The same username on two sites does not mean the same person owns both accounts. Short and common names are claimed by many unrelated people. A “found” result tells you where to look. Verify it with independent signals such as a matching photo, a linked website or a consistent join date. Only look up usernames you have a legitimate reason to research: your own, your brand’s, or ones that are part of authorized work. Read our responsible-use guidelines.
Sites and categories covered
The search runs on our own engine. We choose each site, write its detection rule and keep it up to date ourselves. The list covers social and community sites, coding and tech sites, gaming platforms, and more across video, music, art, finance, shopping and blogging. Popular U.S. platforms are included, among them Instagram, TikTok, X, YouTube, Reddit, Twitch, GitHub, Snapchat, Pinterest, Steam, Roblox and Spotify. Browse the full list by category or jump to a single-platform checker.
FreeUsername is an independent tool. It is not affiliated with or endorsed by the WhatsMyName project, Sherlock, Maigret or any site it checks.
AI bio generator
Found a free username? The next thing people see is your bio. Our AI bio generator asks for the platform, a few words about you and a tone, then writes 6 bios that already fit that platform’s limit: 150 characters on Instagram, 80 on TikTok, 160 on X. Only what you type is sent to an AI service provider, and we do not store it. A few bios we wrote to show the style:
- Instagram, bakery: “Sourdough at 7, gone by 10 🍞 Small bakery in Leeds. Order ahead through the link below.”
- TikTok, gamer: “Cozy games, loud opinions. New farm tour every Sunday.”
- X, designer: “Product designer. I redraw bad app screens so you don’t have to.”
Write your bio with AI, or go straight to the Instagram or TikTok bio generator.
Frequently asked questions
Is this a username finder, username lookup or username searcher?
All three. Type one handle and the username finder looks it up on 3,450+ sites, then lists each public profile it finds with a direct link. It also works as a reverse username search: start from a handle and see which accounts use it.
Can it track a username over time?
It is not a username tracker that watches accounts. Each search shows where the handle exists right now. Run it again later to see what changed.
Is there a free social media username search?
Yes, this one. It searches social media and 3,450+ other sites for a username in one go, for free and without an account. Think of it as a social media search that only takes usernames: it won't match real names, photos or phone numbers. Results are public profile pages only.
What is a deep username search?
It is a username profile search that goes beyond "taken or free". For every account found, we also fetch the public display name, avatar, bio and, where available, follower count and join date, so you can judge whether accounts belong together.
How do I look up a username on social media?
Type the handle into the box above. The social media username search checks the big networks and every other supported site at once, and lists each public profile it finds. To find a username you have forgotten, search your old nicknames and email inbox for sign-up mails, then run each candidate here.
Can I do a user ID lookup or user ID search?
You can do a user lookup by the public username (handle) that appears in profile links. Numeric account IDs differ on every site and are not supported, so a user ID search by number will not work here. A few platform checker pages explain where a site shows its numeric ID, such as Steam's 17-digit SteamID64. To search for a username, type it above or paste a profile link and we pull the handle out of it.
Is this deep username search free?
Yes. The full scan, profile details included, is free with no sign-up, no paywall and no limit on how many results you see. A per-minute rate limit protects the service from abuse.
Can I find a user without knowing their exact username?
Not reliably. Each check looks for the exact handle you type, so try the variants people tend to use: with and without underscores, dots or numbers, and old nicknames. You can search up to 5 variants at once. A display name or real name is not a username and will not match.
Do you store the usernames I search?
No. Your browser sends the username to our server only to run the check; we do not store or log it. Recent searches stay in your own browser, and you can clear them anytime. Details are in our privacy policy.
Can I check if a username is available on Instagram or TikTok?
TikTok is in the scan. Instagram is not checked automatically: it blocks automated checks, so our Instagram page shows how to check a name in the app yourself. Other large platforms sometimes block checks too, so you may see "Blocked" instead of "Not found." Confirm on the platform before you rely on the result.
Why does a site show "Found" when I don't have an account there?
Someone else may use the same name, or the site may return a page for any name. Open the link to check, and use "Report wrong result" so we can fix the site's rule.
How is this different from Namechk, KnowEm or Sherlock?
Namechk and KnowEm focus on availability across around 100–500 sites. Sherlock is a command-line tool for about 400 sites. We check 3,450+ sites in the browser, show four statuses so a failed check is not reported as "available", and add profile details and export.
Can I find who is behind a username?
No. This tool only shows where a public profile with that name exists. It does not reveal identities, emails, phone numbers or private data.
Data sources
Open data, credited
Credit for the open data behind our username search.
Username search across 3,450+ sites
The FreeUsername Android app checks one username across 3,450+ sites. Username data from the WhatsMyName project, licensed CC BY-SA 4.0, is used in this website and the Android app, together with data from Sherlock and Maigret. The FreeUsername engine adds more sites we verify ourselves. FreeUsername is independent and is not affiliated with or endorsed by any of these projects.