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Excel add-in · 30-day trial · BYOK provider model

Finance AI, inside your workbook.

Chat with your spreadsheet, draft formulas and charts you approve before they land, and call any LLM from a cell with =YIGAI — all with your own provider key. Your workbook data and keys stay in the Excel taskpane session by default. No card for the trial; no automatic charge.

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What you get

Workbook chat

Ask questions across your selected ranges, sheets, formulas, and tables — answers in context, without leaving Excel.

Reviewed write actions

Propose formulas, charts, formatting, tables, and clean-ups. You approve every change before it touches the workbook.

=YIGAI formulas

Call any supported LLM straight from a cell with =YIGAI() — fill, classify, extract, and summarize across ranges.

Month-Close workbench

Variance packages, driver ranking, supporting rows, and export-ready review output for the close.

Template authoring and the source-drift gate unlock on the Partnership tier during the public beta; the Audit Ledger UI/export/verify is an Enterprise feature.

Where your data goes

Data path

Workbook context goes straight to your chosen provider.

The taskpane calls your selected LLM provider directly from the Office runtime. Yigcore does not receive your workbook contents in this Excel path.

Credential model

Your keys stay in the taskpane session.

Bring your own OpenAI, Anthropic, Gemini, Mistral, DeepSeek-compatible, custom endpoint, or local Ollama configuration. Keys stay in taskpane memory for the session by default.

Install in 3 steps

  1. Verify your email and download the shared Office manifest.
  2. Sideload it in Excel: Insert → Add-ins → Upload My Add-in.
  3. Paste your license key and your own LLM provider key — you are live.

Need the details? See the full install guide, or verify your email and download the manifest.

Plans

Free

EUR 0

Generic AI chat, workbook tools, comments, and =YIGAI formulas.

Partnership

Free during public beta

Everything in Free plus finance workflows, templates, and the source-drift gate.

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