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Save yourself
an hour everyday

Use AI in Excel formulas to run your prompt on thousands of rows of tasks in minutes.

Join the waitlist →
We'll cover your model costs for 30 days
Run the world's most powerful
AI models in your spreadsheet
Anthropic AWS Azure Google DeepSeek Mistral Ollama OpenAI

Monitor Web Content

Monitor your competitor's blogs, prices, and social media everyday before your daily 09:00 meeting.

Import Data

Import structured data from files on your disk, scrape web pages, or format data for charting, sorting, and other Excel functions.

Trigger External Tools

Perform actions in other systems like sending emails, updating CRMs, or making API calls.

Create Product Descriptions

Generate product descriptions and quickly translate them into multiple languages.

Use AI in Excel formulas

The fast way to actually get AI working for you

For you

Turn your Excel expertise into AI skills

  • Make quick work of data cleaning, classification, and extraction tasks that once took hours.
  • Build AI-driven workflows within your comfort zone — no new programming langues to learn.
  • Become your team's go-to Excel person. Automate for yourself, then share your technique.

“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

  • Immediately free your team from repetitive manual work with the spreadsheet they already master.
  • Bypass lengthy rollouts of specialized AI systems. Your team already have Excel on their computers.
  • Enable marketing, finance, sales, operations and other teams to automate everyday tasks without depending on developers.

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.

Personal Support

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

Reliable

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.

Hosted & Local Models

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 AI for everyday tasks

Now use an Excel formula to run your prompt on thousands of rows of tasks.

Setup in Minutes

Simple to install, quicker than
copy-pasting chat messages

  • Sign up and install.
  • Open Excel and select your preferred model.
  • Instantly use AI formulas, no coding required.

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

— Agentc77, on github.com

Familiar Excel Workflow

If you can write a formula,
you can use Cellm.

  • AI formulas behave like native Excel cells.
  • Prompts can reference other cells and re-run when inputs change.
  • Outputs can be filtered, charted, and used in other Excel formulas.
=PROMPT(A1, "Extract company names from the text")
DEFGHIJ
=PROMPT(A2, "Classify the user's feedback as GOOD or BAD")
DEFGHIJ

Simple, transparent pricing

Start slow, upgrade as you grow. No hidden fees or long-term commitments.

Power User

Full flexibility for technical people. Ideal if you prefer to manage your own API keys or run models locally.

$9/month
Run local models or bring-your-own API key. No hidden markups.
Get started in minutes
  • Anthropic, OpenAI, and local models
  • Zero data retention
  • Community & Email support

Teams

The easiest way for your team to use AI in Excel. Pay only for assigned users after setup. Includes $40 of Google Gemini usage.

$49/month/user
Includes 400.000 prompts/month/user (Gemini 2.5 Flash with 400 input and 60 output tokens)
Everything in Professional, plus
  • Central billing
  • Team management
  • Every feature we got

Want to know more?

We'll cover your model costs for 30 days