Hardware & Devices
233 startup ideas from X's best builders, sorted so you don't have to dig.
233 ideas · page 7 of 8
Health & Fitness
AI daily check-in symptom tracker for chronic illness
Fintech & Investing
Investment simulation using prediction-market probabilities
Developer Tools
Search engine for MCPs: one MCP to find all the others
Research & Other
Research: predict embeddings of next paragraphs to speed up LLMs
Hardware & Devices
High-throughput, low-cost cash-counting machines
Fintech & Investing
VC fund for expat Indians returning to build startups
Social & Community
LinkedIn alternative built on public Q&A with companies
AI & Agents
AI that shadows top 0.1% talent and is licensed as their extension
AI & Agents
Vibe-coded, AI-native free alternatives to legacy SaaS (Figma, Adobe, DocuSign)
AI & Agents
$100 MVP builder: prototype + landing page + ads to test demand
Consumer Apps
Honey 2.0: a shopping-savings extension that shares value with creators
B2B & SaaS
Find AI SaaS ideas by automating what users "Export" for
Education & Learning
Duolingo for curiosity: snap a photo, learn a surprising fact
B2B & SaaS
Software that helps manufacturers legally minimise tariffs
Consumer Apps
Spotify for babies, with AI-generated sleep music
Education & Learning
Turn top AI papers into interactive notebooks
Marketplaces & Services
Services for the micro-wedding trend
Fintech & Investing
Kelley Blue Book-style valuation guide for startups
Social & Community
"Chemistry" dating app: video call before any IRL date
B2B & SaaS
Team chat priced per message instead of per seat
Marketplaces & Services
Third-party trivia-night operator for bars and companies
Marketplaces & Services
A bootstrapped, profitable WeWork competitor
Media & Content
Flip the newsletter model: a smarter digest that beats 50% open rates
Media & Content
A horror movie set inside a cinema hall
Hardware & Devices
Modern rotary phone as a digital-detox dock
Social & Community
Social app that hides creator identity until you engage
AI & Agents
AI to-do app that asks clarifying questions and executes tasks
AI & Agents
Grammarly that runs locally on your machine
AI & Agents
Deepfake meeting stand-in that also summarises what you missed
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