defluff

Defluff

AI wrote this email. Let's see what they actually wanted.

Reverse the AI behind corporate email: infer the prompt the sender gave their LLM, classify the message, surface the real ask. Zero servers, your keys, your models.

_{A real sales-outreach email, defluffed — the reversed prompt gives it away in one line.}

What is this?

Corporate email has become unreadable. Half of every message is AI-generated filler, restated context, and "I hope this finds you well."

Defluff is a browser extension and Outlook add-in that replaces the body of an open email with:

1. The reversed prompt — one line naming what the sender probably asked an AI to write ("Pitch our DevOps services and offer a free infrastructure review"). Often this is all you need.
2. A verdict — Actionable / Response needed / FYI / Noise, with scam-pattern naming for the threats you actually see in 2026: invoice fraud / BEC, phishing, fake recruiter, conference scam, crypto pitch.
3. 3–5 bullets — the actual specifics, preserved verbatim.

"Show original" is one click away if you want the full email back.

The interesting part isn't the summarization — that's just an LLM call with a restrictive prompt. The interesting part is the trust model: there is no Defluff backend. Your email body and your API key never leave your browser for any infrastructure we operate. Each De-Fluff click goes straight from your browser to the LLM provider you picked. Zero retention isn't a policy, it's the architecture.

How it works

Install

Available now

claude plugin marketplace add FinAegis/defluff
claude plugin install defluff@finaegis

openclaw skills install defluff

Coming soon (pending live-testing — track in #7)

• Chrome Web Store — browser extension for Gmail / Outlook Web / LinkedIn Messaging
• Edge Add-ons — same build
• Firefox AMO — same build
• Microsoft AppSource — Outlook add-in (desktop + web)

For developers right now

git clone https://github.com/FinAegis/defluff.git
cd defluff
pnpm install
pnpm --filter @defluff/extension build

Then load apps/extension/dist as an unpacked extension (chrome://extensions → Developer mode → Load unpacked). Click the Defluff icon in the toolbar to open settings.

For the Outlook add-in:

pnpm --filter @defluff/outlook-addin dev

Then sideload apps/outlook-addin/manifest.xml from Outlook Web → Get Add-ins → My add-ins → Custom Addins.

Providers

All four share one extraction prompt. Swap providers anytime from the options page.

How it compares

_{* Plus whatever you pay your chosen LLM provider. Typical heavy usage: under $1/month on Claude Haiku or GPT-4o mini. $0 on Ollama.}