Your AI companion for Excel to
analyze
Your email will be deleted immediately after we notify you.
An AI assistant that lives in Microsoft Excel. Built for collaboration, not autonomy theater. You guide, it executes. Analyze data, create reports, automate repetitive spreadsheet tasks, and transform your data into insights.
Real-time demo showing Cellgeist analyzing data, creating formulas, and formatting spreadsheets with natural language.
Ask Cellgeist to analyze your data, identify trends, find outliers, or create summary statistics. Get insights in seconds without writing complex formulas.
Create formatted reports, pivot tables, and visualizations with natural language. Cellgeist understands your data and formats it beautifully.
Remove duplicates, fix formatting issues, split columns, merge data—all with simple requests. Cellgeist handles the tedious work so you don't have to.
Describe what you want to calculate and Cellgeist writes the formula for you. From simple sums to nested VLOOKUP, INDEX-MATCH, and array formulas.
Your turn.
What will you analyze?
Your email will be deleted immediately after we notify you.
Native Microsoft Excel add-in. Works with Excel for Windows and Mac. No third-party tools required.
Use Anthropic Claude, OpenAI GPT, Google Gemini, or any OpenAI-compatible API. Full control over which model you use.
Your API keys and chat history stay on your computer. Only your messages go to your chosen AI provider—configured to not retain or train on your data.
Export your entire chat history at any time. Import them anywhere. No lock-in, no vendor control.
Fair pricing for software. At-cost billing for AI. We're not token merchants.
For users comfortable with API keys and technical setup
For users who want everything ready to go
*We use Anthropic Claude Haiku 4.5 and Sonnet 4.5 and charge API pricing
Yes. You'll sign up with cellgeist.ai for license enforcement. We only store your payment info and license information—nothing else.
Cellgeist works with Excel for Windows and Mac (Microsoft 365 and Office 2021 or later). Excel Online support is planned for the future.
Everything stays on your computer—settings, API keys, and chat history. Only your messages and the cell ranges you work with go to your chosen AI provider. Cellgeist configures providers to not retain or train on your data when supported. Cellgeist checks in with cellgeist.ai for license verification (your email and subscription status only). We collect zero telemetry and never will.
No. Cellgeist is proprietary software, but we're committed to transparency. You can observe all network requests and inspect the source code shipped as part of the add-in to verify it behaves as promised.