Methodology

What I mean by a Gem

This directory is small on purpose. I add a tool when I would use it on work that has a clock on it, not when it is famous or free.

The test is whether it returns more than the time it costs. A paid lookup that finishes in twenty seconds can beat a free script that needs an hour of babysitting. People who do this for a living already know that. They pay for quality when the price is reasonable. They skip "free" tools that turn into a weekend project.

That is why some expensive tools are here and some beloved open-source ones are not. I grade whether I would spend a client's hour on it, not community spirit.

How a Gem gets picked

A Gem is a tool I would reach for first on paid work. Quality and speed matter more than a free price tag. Free tools that take too long are out.

It is an editorial pick, not a public rating and not a paid slot. The first Gem on the list is Behind the Email. After that I keep HackCheck, IntelBase, Revealer.US, and Fingerprint.to close. Those four earn their keep the same way: they are faster and cleaner than assembling the same picture from a pile of free tabs.

Paid results stay in if the price is sane. A subscription that replaces an afternoon of scraping is cheap. A free CLI that needs a fresh Python environment, stale modules, and a lot of false positives is not a bargain.

What I leave out

I leave out tools that are only cheap because they dump the hard part on you. I also leave out things I cannot recommend with a straight face: abandoned projects, results I cannot check, and pages that exist mainly to collect affiliate clicks.

What the labels mean

Type is how you use a resource: a web app, CLI, API, desktop install, and so on. Price is the access model as it stands today, not a promise it will stay that way. Setup is the work before the first useful result, from opening the site to installing and configuring a local tool.

Categories overlap because real investigations do. An email lookup often touches breach data and people search. I would rather list it twice than make you guess the folder.

Keeping listings current

Tools change prices, break, or get sold. When a listing is wrong I fix it. When a resource is gone I take it off the site. If you spot a dead link or a description that no longer matches the product, email [email protected].