Cellyn

Cellyn lets you build and automate Excel workflows just by describing what you need

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Chat
Automation
Audit
Settings
Good Morning
How can I help you today?
Analyze Data
Summarize trends and key insights.
Build a Model
Build projections, DCF, or forecasts.
Error Checking
Find errors and broken references.
Format & Clean
Auto-format and clean up layout.
Summarize Sheet
Quick overview of your workbook.
fx
Write Formulas
VLOOKUP, INDEX-MATCH, and more.
Coming Soon

Intelligent Automation

Your workflows, supercharged

Imagine recording a complex Excel task once, and letting AI handle it forever. Share your best workflows with your team. Pull live data from enterprise systems directly into your models.

Record & Replay

Capture complex workflows once. Replay them with one click, adapted intelligently by AI.

Share with Your Team

Built a great skill? Share it with colleagues instantly. Collaborate on workflows together.

Connect Your Data

Pull live data from S&P Capital IQ, SAP, Salesforce, Outlook, and more - directly into Excel.

Schedule & Trigger

Set automations to run daily, weekly, or on specific triggers. Wake up to updated models.

Connect to enterprise data

S&P Capital IQ SAP Salesforce HubSpot Outlook Bloomberg NetSuite QuickBooks S&P Capital IQ SAP Salesforce HubSpot Outlook Bloomberg NetSuite QuickBooks

Start with AI Chat

While we build automation, our AI chat can already help you create formulas, clean data, build models, and analyze your spreadsheets - just describe what you need.

Questions or feedback? support@cellyn.ai
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User Manual

Cellyn AI is your intelligent Excel co-pilot. Simply describe what you want to accomplish in natural language, from building complex financial models to cleaning messy data. Cellyn understands your spreadsheet context and executes operations automatically, turning hours of manual work into seconds.

"Build a DCF model with 5-year projections"
"Translate column A from German to English"
"Clean this data and remove duplicates"
Models
f(x)Formulas
Δ%Analysis
A↔BTranslate
Data Ops
LOGAudit
Financial Modeling
"Create an LBO model for the selected company data"
"Build a 3-statement financial model"
Data Operations
"Standardize date formats to DD/MM/YYYY"
"Add conditional formatting for values above 1000"
Analysis & Questions
"What's the total revenue in column B?"
"Explain this formula"
1
Be Specific — Instead of "sum this column" try "sum B2:B100 and put result in B101"
2
Chain Commands — "Clean the data, then create a chart, then add a summary table"
3
Ask Questions — Cellyn can answer questions about your data, formulas, and Excel features
4
Use Context — Reference previous results: "Now format those cells" or "Add a chart for that"

To ensure fair usage and maintain service quality for all users, Cellyn AI uses a daily credit system. Each day you get 10 credits that reset at midnight CEST (Central European Time).

Each AI-powered request uses 1 credit. Credits reset daily at midnight CEST. Your current usage shows above the chat input.

What Does NOT Use Credits

Simple conversational messages are free and don't consume credits:

Greetings: "Hi", "Hello", "Good morning"
Farewells: "Bye", "Goodbye", "See you"
Gratitude: "Thanks", "Thank you", "Appreciate it"
Acknowledgments: "OK", "Got it", "Sure", "Yes", "No"
Pleasantries: "Sorry", "No problem", "Please"
Simple responses: "Done", "Never mind", "Sounds good"
What Uses Credits

AI-powered operations that analyze, create, or modify your spreadsheet:

Building financial models (DCF, LBO, etc.)
Creating and explaining formulas
Data cleaning and transformation
Analysis and projections
Translation and formatting
Tip: Chain multiple operations in one request (e.g., "Clean the data and create a chart") to maximize your credits!
Upcoming Features

Run workflows and analysis across multiple Excel files simultaneously. Consolidate data, compare periods, and generate cross-file insights.

Cross-file data consolidation
Batch workflow execution
Period-over-period comparisons

Connect your inbox and let Cellyn automatically download attachments, run your saved workflows, and deliver processed results.

Auto-download Excel attachments
Trigger workflows on new emails
Email processed results back

Work on the same spreadsheet with your team. Cellyn tracks all changes and generates intelligent summaries of what changed and why.

Real-time collaboration
Automatic change tracking
AI-generated change summaries

Extract data from Word documents, PDFs, and PowerPoints. Cellyn reads your files and creates structured Excel summaries automatically.

PDF table extraction
Word document parsing
PowerPoint data extraction

Connect directly to your enterprise data sources. Pull live data from SAP, Capital IQ, Bloomberg, and your internal databases.

SAP — ERP & Financial Data
Capital IQ — Market Intelligence
Bloomberg — Real-time Market Data

Transform your Excel insights into beautifully crafted presentations. Personalized to your company's brand and style guidelines.

One-click presentation generation
Company brand templates
Smart chart & narrative creation
Privacy Policy

Cellyn AI is developed by the Cellyn team, based in Europe. We are committed to protecting your privacy and handling your data responsibly.

We process only the minimum data necessary to provide our services. Spreadsheet data is processed in real-time and never permanently stored. Account data (email, name) is stored securely for authentication purposes.

AI processing is performed by Google Vertex AI under strict data processing agreements. Your data is never used to train AI models. Processing occurs in EU data centers with full GDPR compliance.

Under GDPR, you have the right to access, correct, delete, and export your data. You can also object to processing and withdraw consent at any time. Contact privacy@cellyn.ai for any requests.

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Terms of Use

Cellyn AI is currently in MVP (Minimum Viable Product) phase. This version is provided for testing and evaluation purposes only. Features may change, and service availability is not guaranteed.

We grant you a limited, non-exclusive, non-transferable license to use Cellyn AI for personal, non-commercial purposes during the MVP phase. Commercial use requires a separate agreement.

You may not: reverse engineer the software, use it for illegal purposes, share your account credentials, or attempt to circumvent any security measures.

The service is provided "as-is" without warranties of any kind. We do not guarantee accuracy of AI outputs or uninterrupted service availability during the MVP phase.

These terms are governed by the laws of Germany. Any disputes shall be resolved in the courts of Frankfurt am Main.

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