Linkook: how to use it, and a browser alternative

Most username tools search the same handle on every site. Linkook goes further: it reads the accounts it finds and follows links to other accounts, even when they use different names. Here is how it works and when a simple browser search is enough.

Linked account discovery (CLI). Project: github.com/JackJuly/linkook · License: MIT · Last reviewed 2026-10-17

What is Linkook?

Linkook is a Python project by JackJuly under the MIT license, last pushed in October 2026. Its README describes it as a tool for discovering linked social accounts and associated emails across multiple platforms from a single username. It does not state a site count.

By default it scans sites marked as connected in its provider file; --scan-all scans every site in that file. It can export results as Neo4j-friendly JSON so you can see how usernames, accounts and emails connect, which also helps you filter out unrelated accounts that only share a name.

Optional flags check found emails against breach data services; one of them needs a paid API key. Our tool does not do breach lookups, and our email tools are coming soon and are not live.

How to use Linkook

Install it with pipx (or pip), or clone the repository and run it as a module.
Run linkook followed by a username.
Add --scan-all to check every site in its provider list, and --show-summary for a recap.
Use --neo4j to export a graph file, then confirm each linked account by hand.

Example commands from the project's README (check it for the current version):

pipx install linkook
linkook username
linkook username --scan-all --show-summary
linkook username --neo4j

Linkook vs WhatsMyName Apps

Feature	Linkook	WhatsMyName Apps
Sites checked	Not stated in its README	3,165+ sites, merged from the WhatsMyName, Sherlock and Maigret lists
Method	Same-name search plus links found on each account	Public profile pages at a username
Setup	pipx, pip or source; Python required	Nothing to install. It runs in the browser
Linked accounts	Yes, recursive	No
Export	Results folder and Neo4j-friendly JSON	JSON and CSV (no PDF)
Automation	CLI	No API and no CLI
Price	Free, open source (one optional breach check needs a paid key)	Free, no sign-up

Based on Linkook's own documentation as of 2026-10-17. Tools change; the project page is the final word.

Pros and cons of Linkook

Pros

Follows real links between accounts, which can surface handles a same-name search misses.
Graph export for visual analysis.
MIT license, updated in October 2026.

Cons

Needs Python and a terminal.
The README gives no site count, so coverage is hard to compare.
Breach checks depend on outside services, one paid.

Who Linkook is for

Linkook suits investigators who want to see how accounts connect to each other. For a quick check of where one handle is used, a browser search is simpler.

Try a username search in your browser

Free, no sign-up. Checks 3,165+ sites; the username is not stored or logged.

Frequently asked questions

What makes Linkook different from Sherlock?

Sherlock searches the same username on each site. Linkook also follows links from the accounts it finds, so it can surface accounts that use different usernames.

How do I install Linkook?

Run pipx install linkook (or pip), then linkook followed by a username.

Can I use Linkook online?

No. It is a command-line tool. For a plain username search in the browser, our tool checks 3,165+ sites with no install.

Related tools and guides

Sherlock: Username search (CLI)
Maigret: Username search (CLI and web UI)
User Scanner: Username and email search (CLI)
Social Analyzer: Profile finder (API, CLI, web app)
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Names and trademarks belong to their owners. WhatsMyName Apps is independent and not affiliated with or endorsed by Linkook or its authors.