Is there a growth experiment tool that works inside Claude and ChatGPT?
Yes. Theanna works inside Claude, ChatGPT, Claude Code, Cursor and any AI tool that supports MCP. Add https://mcp.theanna.io/mcp as a custom connector and sign in. Then ask what to test, start experiments and check your numbers without leaving the chat. Theanna measures each experiment in your own tools.
By Nomiki Petrolla, founder of Theanna
What can you do with Theanna inside your AI tool?
Everything you need to run an experiment, right in the chat. You never have to open another tab. Theanna does the measuring.
- Suggest what to test: Theanna looks at your numbers and suggests the experiment most likely to move them, with a goal and a length.
- Start an experiment: turn an idea into an experiment and start it, without opening another tab.
- Save the work: your AI tool writes the posts, emails and pages, and Theanna saves each one to the experiment, step by step.
- Send your numbers back: your AI tool pulls numbers from your other tools, like Stripe, your forms or your ads, and sends them to Theanna to measure.
- Check how it's going: ask about any experiment and see its number against where it started.
- Stop or change it: change an experiment, or stop it when it isn't working, right from the chat.
“I use Claude Code to build frontend features, write and send segmented email campaigns, manage my Linear board, triage my inbox, and deploy code.”
How do you connect Theanna to Claude or ChatGPT?
It takes about two minutes.
- 01
Open your AI tool's settings
In Claude, go to Settings, then Connectors.
- 02
Add Theanna
Add a custom connector and paste https://mcp.theanna.io/mcp
- 03
Sign in
Sign in to your Theanna account. Everyone uses the same address, and it only works with an active account.
- 04
Ask your first question
Try "What should I test next?" and Theanna takes it from there.
What can you ask it?
What should I test next to get more sign-ups?
- What happens:
- Theanna reads your numbers and suggests one experiment, with a goal and how long to run it.
Start the referral experiment.
- What happens:
- Theanna sets it up and lists the steps.
Write the email for step 2.
- What happens:
- Your AI tool drafts it, and Theanna saves it to the experiment.
Pull this week's sign-ups from Stripe and send them to Theanna.
- What happens:
- Your AI tool grabs the number from your Stripe connector, and Theanna measures it.
Is my pricing experiment working?
- What happens:
- Theanna shows the number now against where it started.
Does it work with the other tools I've connected to Claude?
Yes. Every tool you've connected in your AI tool, like Stripe, Google or your CRM, can feed numbers into your experiments. You don't have to connect them to Theanna too.
Theanna also reads Stripe, Google Analytics, Search Console, Calendly, Customer.io and more on its own, so those numbers keep coming even when nobody has the chat open.
“I have a system that connects my tools, my data, and my voice into a workflow that lets me communicate with every segment of my audience in minutes, not days.”
Does it work for a whole team?
Yes. Each person adds Theanna to their own AI tool and signs in. Everyone sees the same company target, the same goals and the same experiments, and each experiment shows who started it.
So a teammate can start an experiment from Claude, another can check it from ChatGPT, and the results land in one place.
Which AI tools does it work in?
- Claude
- ChatGPT
- Claude Code
- Cursor
- Any app that supports MCP
Questions teams ask
What is MCP?
MCP, the Model Context Protocol, is how AI tools like Claude and ChatGPT connect to other apps. Adding Theanna as a connector lets your AI tool read your experiments and numbers, and start and update experiments for you.
What's the Theanna MCP address?
https://mcp.theanna.io/mcp. Everyone uses the same address. Signing in decides whose data it is, and it only works with an active Theanna account.
Do I need to know how to code?
No. You add the connector in your AI tool's settings, sign in, and ask questions in plain words.
Is there a growth experiment tool for ChatGPT?
Yes. Theanna connects to ChatGPT the same way it connects to Claude, as a custom connector with the address https://mcp.theanna.io/mcp.
What's the price of Theanna for teams?
The Team plan starts at $999 a month for up to 3 people. Bigger teams book a demo.