Cellm - AI-Powered Spreadsheet Formulas

New • Early access spots open soon

Spreadsheets that think with you. Local, private, and open source.

Run thousands of prompts while most people run one. The fast way to make AI work for you.

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We'll pay your model costs for 30 days

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Bring your own API key

Run the world's most powerful AI models
in your spreadsheet. No vendor lock-in.

It starts with a formula

Use =PROMPT() like any other Excel formula: Run across thousands of rows of data, connect to websites and APIs, and speedrun everyday tasks. No developers needed.

Stay ahead

Data Preparation

Use AI in Excel formulas to classify, clean, and augment your data instead of repeatedly copy-pasting prompts in and out of chat windows.

Fresh data every morning

Market Research

Pull live data from websites, APIs, and databases. Monitor your competitor's blogs, prices, and social media everyday before your daily 09:00 meeting.

AI does the busy work

Process Automation

Let Excel perform actions in other systems on your behalf, like sending emails, updating CRMs, or making API calls.

It ends with teams making AI work for themselves

Most AI deployments fail because of bad human-AI workflow, team resistance, and security concerns. Not with Cellm. Your team already has Excel on their computers.

Fits into existing workflows

It's just Excel

Excel formulas are the human-AI interface. No specialized platforms, no switching between tools, and no lengthy AI rollouts.

Teams lean in, not out

Adoption Through Empowerment

Resistance dissappears when marketing, finance, and sales can automate tasks themselves without waiting on developers or IT.

You control the data

Privacy & Security

Run models locally, connect your own cloud accounts, or subscribe to Cellm for complete privacy and zero data retention guarantee.

Make AI work for you

Practical AI for real work. Liked by 800+ people on GitHub.

For you

Turn your Excel expertise into AI workflows

Build AI-driven workflows within your Excel comfort zone. No programming languages to learn.
Choose your preferred cloud provider or run models locally to keep your data completely under your control.
Become your team's go-to AI person. Automate for yourself, then share your spreadsheets.

Join the waitlist →

“I love feeding data to ChatGPT, one copy-paste at a time”
— no one who’s run the same prompt 5 times

For your team

Boost team productivity, no developers needed

Let your team build their own AI workflows with open source software you can audit and trust.
Enable marketing, finance, sales, operations and other teams to automate everyday tasks themselves without developers.
Bypass lengthy rollouts of specialized AI systems. Your team already have Excel on their computers.

Join the waitlist →

This is the second legitimate use for AI I've seen in the past three years.

— Addy Espresso, on x.com

Secure and Privacy-first

Your spreadsheets are your own business and we have no interest in your data. Notice how there's no cookie banner. Read more in our Security and Privacy policies.

Real humans, fast replies

We personally respond to every email, and deeply care about problems you're having. Want to be personally onboarded? Find a bug? Email us.

Built to last

We run a self-funded, sustainable business backed 100% by our customers. Cellm is built to last, and we expect to be running it in ten years.

Work online or offline

Use the world's most powerful models from Anthropic, OpenAI, and others, or run models on your own computer to ensure no data ever leaves your machine.

You already use chatbots to solve everyday tasks, one at a time

What takes hours in ChatGPT takes minutes in Cellm. Process thousands of prompts while you grab a coffee.

Setup in Minutes

Simple to install, quicker than
copy-pasting chat messages

Sign up, install, and open Excel.
Select your preferred model.
Instantly use AI formulas, no coding required.

Join the waitlist →

First off, love this tool. Thank you! Works well with the default Ollama.

— Agentc77, on github.com

Familiar Excel Workflow

If you know =SUM(), you can use =PROMPT()

Cellm's =PROMPT() behave like any other built-in Excel formula.
Prompts can reference other cells and re-run when inputs change.
Your results can be filtered, charted, and used in other Excel formulas.

=PROMPT(A1, "Extract user feedback from URL in column A")

D	E	F	G	H	I	J

=IF(PROMPT(A2, "Classify the user's feedback as GOOD or BAD")="GOOD", "Send thank you email", "Forward to customer service team")

D	E	F	G	H	I	J

Simple, transparent pricing

30-day money-back guarantee. If you don't like Cellm, we'll refund you. No hidden fees or long-term commitments.

Free

Run local models or connect your own account from leading AI providers. Great for personal projects.

Join waitlist

$0/month

Our generous free tier, perfect for personal and non-sensitive projects.

Get started in minutes

Anthropic, OpenAI, Mistral, and DeepSeek

Use local models, no data leaves your computer

Community & Email

Power User

Connect your spreadsheets to business tools and data via MCP. Use models through your own cloud accounts. No hidden markups.

Join waitlist

$9/month

Secure, flexible, and cost-effective. Connect your own infrastructure.

Everything in Free, plus

AWS, Azure, Google, and any OpenAI-compatible provider

Build powerful workflows with MCP servers

Zero data retention

Professional

The perfect balance of convenience and privacy. We manage everything for you. Your data is processed securely and exclusively in the EU.

Join waitlist

$29/month

$20 usage included. No separate accounts or setup needed.

Everything in Power User, plus

Mistral models, data processed exclusively in the EU

High-throughput for demanding workflows

~500.000 prompts per month @ Mistral Small 3.2

Teams

The easiest way for your team to use AI in Excel. Protect company data with team management, and centralized billing.

Join waitlist

$49/month/user

$40 usage included. Higher limits, simple setup and central billing.

Everything in Professional, plus

Team management and central billing

Pay only for assigned users after setup

Additional ~500.000 prompts/user/month @ Mistral Small 3.2

Compare all features

Want to know more?

Join the waitlist →

We'll cover your model costs for 30 days

Spreadsheets that think with you. Local, private, and open source.

It starts with a formula

Stay ahead

Data Preparation

Fresh data every morning

Market Research

AI does the busy work

Process Automation

It ends with teams making AI work for themselves

Fits into existing workflows

It's just Excel

Teams lean in, not out

Adoption Through Empowerment

You control the data

Privacy & Security

Make AI work for you

Turn your Excel expertise into AI workflows

Boost team productivity, no developers needed

Secure and Privacy-first

Real humans, fast replies

Built to last

Work online or offline

You already use chatbots to solve everyday tasks, one at a time

Simple to install, quicker than copy-pasting chat messages

If you know =SUM(), you can use =PROMPT()

Simple, transparent pricing

Free

Power User

Professional

Teams

Want to know more?

Simple to install, quicker than
copy-pasting chat messages