Corpilus Privacy is live — a privacy filter between you and ChatGPT
The problem we kept hearing
Over the past year, the same conversation kept happening with our customers — consultants, lawyers, HR teams, accountants. They love ChatGPT, Claude, and Gemini for drafting, summarising, brainstorming. They also know that every prompt is a copy of their data leaving the company perimeter. Names, contract numbers, tax IDs, client emails — once pasted in, it sits in someone else's logs.
Most teams react with one of two strategies. Either ban public AI tools outright (productivity drops, shadow IT rises), or write a policy that says 'be careful' and hope nobody pastes the wrong thing on a Monday morning. Neither works.
What we built
Corpilus Privacy is a lightweight browser extension that watches the prompt input field on ChatGPT, Claude.ai, and Gemini. When you start typing or paste content, it scans the text locally — entirely in your browser — and replaces 25+ kinds of personal and business identifiers with neutral placeholders.
A name becomes [PERSON]. An IBAN becomes [IBAN]. A contract number becomes [CONTRACT]. The redacted version is shown inline before submit, so you decide — accept the redaction, undo specific matches, or send the original anyway. Your AI workflow stays exactly the same; just the data leaking out is gone.
9 languages, not just English
Most enterprise PII tools were built for English. They miss Slovak rodné číslo. They miss Czech IČO. They miss Polish PESEL. Corpilus Privacy ships with a 9-language pattern corpus — Slovak, Czech, German, English, Spanish, French, Italian, Polish, Serbian — built and audited by humans, not autogenerated. Detection works on the same text whether your team writes prompts in Bratislava or Madrid.
Block mode for the high-risk stuff
Some identifiers should never reach a public AI service — national IDs, IBANs, medical record numbers. For these, redaction is not enough. Switch the scan to 'block' mode and Corpilus Privacy stops the prompt from being submitted at all. Configurable per pattern, per workspace.
Signed audit log
If you operate under GDPR Article 32, you need to prove what was scanned and when. Corpilus Privacy emits an Ed25519-signed audit entry for every redaction event, anchored to an RFC 3161 timestamp via FreeTSA. The audit log contains the SHA-256 of the redacted prompt and per-pattern hit counts — never the original text. Export it any time as evidence for an auditor.
MCP server companion
If you use Claude Desktop or any MCP-enabled client, the Corpilus MCP server gives the same redaction capability as a tool the AI can call. Paste the snippet from /mcp, sign in with your Corpilus account, and 'privacy_v2_preview' shows up in your tool picker.
Pricing — straight
Privacy Solo is €9 / month for one user. Privacy Team is €29 / month for up to 5 users. Privacy Business is €79 / month for up to 20 users and includes the audit log, signed exports, and a DPA on request. 14-day free trial on every plan, no credit card.
Try it
The extension is in public beta on the Chrome Web Store (Edge supported, Firefox coming soon). Open https://www.corpilus.com/en/download to see the install steps. The MCP server is documented at https://www.corpilus.com/en/mcp with a copy-paste config for Claude Desktop and Cursor.
Privacy first. AI second.