Northkeep Software

Tools that find what's hiding.

We make software that looks where other tools don't, then tells you what it found in words you can act on. No jargon, no ads, and nothing done behind your back.

A stone keep with a lit window on a northern horizon, under the North Star N

Our software

Two products so far, each built around one question people struggle to answer on their own.

INTERLOPER

Find out who else is using your PC.

A Windows scanner for cryptominers, bandwidth-selling proxyware, remote-control backdoors and hidden accounts. You get one verdict in plain English, and fix instructions written for your exact PC.

  • Windows 10 and 11
  • Free to scan, no account needed
  • Watch plan for automatic scans, alerts and one-click fixes

HiddenLots

The lots nobody listed.

Finds owner-sold land, old home sites, estates and lots with utilities already in, pulled from county records and public posts, scored, and sent to your phone.

  • Works in the browser on your phone or computer
  • Built on public county records

How we build software

Look first. Change only when you say.

Interloper's scans are read-only. Every fix is described before it runs, waits for your click, and can be undone.

Plain words.

Our software tells you what it found, why it matters and what to do next, without sending you off to look things up.

Your information stays yours.

No ads, no selling data, and no trackers on this website. Each product's privacy policy says exactly what it stores and why.

Get help

Email us about any of our products. Tell us what you were doing and what you saw, and if it's about Interloper, paste in the text from Copy report for support.

support@northkeepsoftware.com