Also from Rollcall Research

We also build software, not just lists.

The same habit that goes into a contact list — read the source carefully, verify rather than guess — goes into the tools we build too. Payroll Data Shield is the first: a small Windows app that strips personal data out of text before it goes anywhere near ChatGPT or Claude.

£12.99 · one‑time

Strip the PII before it ever reaches ChatGPT.

Scrub client and employee data — NI numbers, postcodes, emails, amounts — before you paste into an AI tool, then restore it in the reply. Windows app, no subscription.

Get it on Gumroad

Payroll Data Shield showing raw text on the left and the redacted version sent to ChatGPT or Claude on the right

Free · no install

Try the detection logic first — free, in your browser.

The Redaction Desk runs the same detection core with nothing to install and no account. Edit the live example below, or open the full version in its own tab.

Open the free tools

The Redaction Desk browser tool showing amount, email and phone number redacted in a sample sentence

Try it right here — your text Redacted, as the app would send it

Simplified in-browser demo — nothing is sent anywhere. The desktop app also restores the original values in the AI's reply.

Open source · MIT

The detection core, out in the open.

The scrub/unscrub logic behind Payroll Data Shield, released as a single-file Python script anyone can read, use, or build on.

View on GitHub

A short Python code snippet from the open-source redaction engine, redact.py

In testing · free

Know what your AI subscriptions actually cost you.

A browser extension that tracks what you actually pay for and use across ChatGPT, Claude and Gemini — and flags what's not earning its keep.

Learn more

Etsy shop

Planners built the same way — on paper, not just in prose.

Homeschool, perimenopause and PMDD planners, built by reading what buyers actually complain about in reviews, then fixing it. GoodNotes/Notability-ready PDFs.

Shop on Etsy

Cover pages for the Secular Homeschool Planner, The Steady Season perimenopause tracker, and the PMDD Cycle and Symptom Journal

Why a research business builds a redaction tool.

Same problem, different sector

A family member nearly pasted employee payroll data into ChatGPT. Same instinct we see everywhere — the risk just isn't obvious until it almost happens.

Verify, don't guess

Same discipline as our contact research, aimed at text instead: UK NI numbers, postcodes, US SSNs, emails, amounts — caught, not assumed.

No subscription, on principle

£12.99 once. Most competitors charge monthly — if it's not worth that to you, it wasn't worth it to us either.

Try the free version first.

No install, no account — see what it does before you decide.

Try the free tool