OpenGamma
Builds branded PowerPoint decks from confidential data without ever showing the AI real numbers.
OpenGamma lets Claude, ChatGPT or any MCP app design an on-brand PowerPoint deck from your company documents, but the AI only ever sees placeholders like [CLIENT_1] and [MONEY_1] — your browser swaps the real client names and numbers back in after the deck comes back, and encrypts the document with AES-256-GCM before it's ever uploaded. It calls this masking pseudonymization rather than anonymity, since placeholders are reversible, and offers a stricter "blind mode" where the AI sees only structure — lengths, table shapes, trends — for the most sensitive material. 30 days of the Core plan are free with no card, and the company says it runs leak tests on every release by planting secret values to see if they surface.
What holds up
- +AI only sees placeholders like [CLIENT_1] — real client names and numbers stay hidden
- +Documents are encrypted with AES-256-GCM in your browser before upload
- +Output is an editable native .pptx with real charts, not a flattened image
- +Blind mode hides even the structure of sensitive numbers from the AI
Mind the limits
- −Calls its own masking pseudonymization, not anonymity — placeholders are reversible
- −Only useful if you already work through Claude, ChatGPT or another MCP app
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