Health & Fitness
Sleep tracker that charges you for scrolling past midnight
Startup idea: A sleep tracker app that charges you every time you scroll your phone past midnight.
212 startup ideas from X's best builders, sorted so you don't have to dig.
Fintech & Investing
TaxGPT: the first tax-filing app inside ChatGPT
Free business idea (you could build this weekend) The 1st tax app in ChatGPT. Picture it: “Chat, file my quarterly taxes" No forms. No downloads. No tax knowledge needed. Here’s the play: • Build TaxGPT inside ChatGPT • Why? It can already…
AI & Agents
Build apps for the ChatGPT app store early
Free business idea (someone steal this) ChatGPT just opened their app store to 300 million users with 7 apps available… This is like 2008 when flashlight apps could make $10,000 a day. The App Store minted 1,800 millionaires. ChatGPT is…
Fintech & InvestingLong-game
Rent out your idle GPU for passive income
Startup idea: An app where you rent out your GPU compute and earn passive income.
Consumer Apps
To-do app that fines you for unfinished tasks
Startup idea : An app that fines you if you don't finish your todos.
Media & Content
VR games from non-human perspectives (bat, bee, 4D)
A VR game that adopts an entirely different perspective as compared to usual 3D space as seen as a human. E.g. a game where you’re a bat, it’s pitch dark and you can navigate only via echo location. Or, game set in 4D space, or fly like a…
Education & LearningLong-game
Micro-school-in-a-box platform for teachers
$5M ARR startup idea that'll make our K-12 children get better education for 80% less Who wants this startup idea? Imagine a retired teacher in North Carolina just quit the school system. She's burnt out on bureaucracy but still loves…
AI & Agents
Natural-language programmable WhatsApp bots
Natural language programmable bots for WhatsApp. Imagine being able to quickly spin up a WA bot that "teaches Spanish everyday", or "sends summary of new cafes opening locally", or even "track calories and motivate me to stay under 1600…
Health & Fitness
Memory-training app for richer recollection of your past
By the way, this book inspired an idea to help build sweeter, richer memories of the past. Steal this idea. Build a memory training app. - Neutral words like “bicycle” etc. or prompts like “favourite holiday”-> record yourself 3-5 mins of…
Marketplaces & Services
Marketplace to resell unused subscriptions
Startup idea: A platform where you can sell your unused subscriptions.
AI & Agents
Personal research feed generated from your LLM chats
A service that ingests your chats with LLMs (chatgpt, Claude, etc) and does continuous background deep research to generate a social media like feed with useful articles and videos on precise topics you’re interested in.
Media & Content
Book of great minds' conversations with LLMs
We need a new kind of book, which is simply chat logs of the greatest human minds of our present age in conversation with LLMs. It'll be fascinating to read the to-and-fro on a deep topic b/w a sharp mind and ChatGPT.
Developer Tools
LLM-as-a-judge API with research best practices
An API service that exposes a well-designed LLM-as-a-judge. Comparing what items via LLMs is so useful but is non-trivial to get right. I really wished an API service existed on OpenRouter that incorporated all the best practices from…
Education & Learning
Interactive, notebook-style versions of YouTube lectures
Make educational videos on YouTube interactive. Take a video (like 3b1b Linear Algebra), chop it into sections and then put them in a Jupyter-notebook like environment where learners alternate between learning a concept and exploring it…
Developer Tools
GitHub for one-shot Claude Code app prompts
A website that collates prompts that you can feed into Claude code for one-shot app development of various kinds. English is the new source code for soloware, so who is building GitHub for it?
Hardware & Devices
Life-coach smart glasses that analyse your day
Smart glasses that takes frequent photos of how you’re spending your day, and then parses them via LLM to share suggestions on how to improve your life. Think of it like a sidekick with just one aim: how to improve your life continuously.
Consumer Apps
Browser extension that blocks AI-generated slop
A browser extension that blocks all AI-generated slop on social media, email or other websites. If I to want to read what AI has to say, I’ll prompt it myself.
Marketplaces & ServicesLong-game
On-demand tech support built for seniors
The world desperately NEEDS this startup idea. "On-demand tech support for seniors" ($5M+ ARR) 61.2 million seniors in the US, 61%+ own smartphones, and exactly ZERO tech support services are built for them. Traditional tech support…
Social & Community
Daily vibe-coding game with community voting
A daily game for vibe coding fun ideas. Every day, the game releases a slightly under specified prompt (like “an angry todo list”) and people compete to build their versions of it. Community votes for their favourites!
Social & Community
App where women share red flags about guys they dated
Startup idea: what if there was an app where women could share red flags about guys they dated...💀
AI & Agents
Silent speech: lip-reading-to-text via camera
A mouth-vocalization to text via camera. Many people (including me) don't use voice input because it feels awkward, especially in public settings. What if you could track movement of mouth, jaw, lips etc to decode purely from camera what a…
AI & Agents
AI agents that find valuable expiring domains
Startup idea for you "AI agents that finds expired dotcom domains" every day 50,000 domain names expire. most are garbage lbut hidden in there are gems - domains with real traffic, clean backlinks, brandable names that someone will pay…
Developer ToolsLong-game
1Password for API keys, aimed at vibe coders
Startup idea for you 1Password does $318M ARR managing passwords from toronto canada now build "1Password for API keys" with a brand that targets the MILLIONS of new vibe coders developers are scattering credentials across codebases…
Social & Community
Read-your-backlog meetups
A meet-up where all everyone does is read things that have been accumulating in their “to read” infinitely long list, and later discuss the highlights of what they read. Brownie points if each meet-up is themed so you read psychology…
Developer Tools
Coding agent on WhatsApp for first-time builders
An AI-powered coding agent on WhatsApp. Wrap Claude Code or Gemini CLI on WhatsApp api, and enable millions to easily build their first app/website. Make money selling domains and hosting for apps they make.
Marketplaces & ServicesLong-game
AI-assisted instant home inspections over video
“boring” startup idea for you instant home inspections via video chat or IRL charge $399 per call sell peace of mind protect your house, protect your family an AI-enabled inspector joins a video call, guides the homeowner room-by-room…
Education & Learning
Cursor for building Duolingo-style learning apps
Cursor for making Duolingo-like learning apps. Work with educators and experts to convert their area of expertise into fully interacting, immersive learning experiences. (Don’t limit to MCQs, generate code that powers mini-apps for…
B2B & SaaS
Flat-fee QuickBooks Desktop migration "escape ramp"
"boring" startup idea for you quickbooks desktop is getting discontinued (~$2.3B/year rev) millions of businesses have no idea how to migrate their books without breaking everything someone’s going to build the $1,500 flat-fee “escape…
Fintech & InvestingLong-game
Insurance for social media accounts and creators
Someone is going to steal this startup idea ("insurance for social media") and make $10M ARR, aren't they?
Social & Community
Pay $1–10 to rename a website for 10 minutes
Startup Idea : A site where anyone can pay $1–$10 to rename the entire website. 🪄 New title 🖼 New favicon 🌐 Temporary URL redirect 💬 Add a custom message It stays live for 10 mins or until someone pays to rename it again. Hall of Fame…
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