Observed arrival · 2026-09-30
Tightlip’s placeholder shield for AI prompts
Tightlip describes a tool that replaces sensitive details with placeholders before a prompt reaches an AI, then restores them in the answer on the user’s device.
- For
- Law firms and teams handling sensitive prompts
- Worth noticing
- The demo replaces case, banking and identity details with consistent placeholders, then restores them in the returned answer.
Field notes
The homepage's example follows a made-up legal memo through redaction and answer restoration, including case numbers, dates of birth, contact details and bank information. It says the same person receives the same placeholder so a model can track roles; for card and routing numbers, the page says check digits are confirmed before substitution. The security disclosure distinguishes local storage of originals and the swap table from the web workspace, where protected text passes through the company's server.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
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