What can you build?
YC GPT
YC application assistant for founders.
Ask Cold Start
Get help solving the cold start problem for your startup.
GRE Tutor
Expert guidance for GRE test preparation.
Steve Jobs
Ask Steve Jobs anything about design, art & culture
AstroChat
Personal astrology and horoscope readings.
AI Bible Mentor
Spiritual guidance and biblical wisdom.
Prompt Smith
Craft perfect prompts for any AI model.
Ask Naval
Wisdom on wealth, happiness, and life philosophy.
Stoic Coach
Ancient wisdom for modern challenges.
Cold Email Mentor
Expert guidance for effective cold email outreach.
Deploy your AI app with 1-click
We take care of all the important integrations for you.
How BuildThatIdea Works
Easy 60 secs setup with no coding needed
Define your custom Chat app
Describe your Chat app's name, description, and how it should act to define its purpose and capabilities.
Choose Base LLM
Choose from OpenAI, Claude, DeepSeek, Tulu, or any other base large language model to power up your Chat application.
Upload Knowledge Base
Customize your Chat app's role, tone, style, and write custom instructions to give your app a behavior and personality.
Set Pricing for users
You can either launch your Chat app for free or charge users based on usage with a fixed monthly pricing.
Start Monetising and Making Money
Create paid Chat apps for your audience or business, launch it online, and start making money.
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Who uses BuildThatIdea?
Creators & Coaches
Turn your expertise into a 24/7 AI assistant. Monetize your audience with a tool they'll love.
Indie Hackers & Developers
Validate ideas in hours, not months. Ship MVPs, test pricing, and iterate fast.
Businesses
Launch internal AI tools and AI apps to scale internal and external functions instantly.
Ready to Build Your AI App?
Start creating your AI-powered product in minutes, no coding required.
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