Y Combinator
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12d ago

Topics for Y Combinator – Fall 2026

The Y Combinator has posted the topics (products) it wants to cover and support.

Here is a list of them:

  • The Primer  AI education with personalised learning

  • The Future of American Defense (Drones, sensors, interceptors,...)

  • A Cloud for Small Software

  • Multiplayer AI (Teams collaborating with shared AI agents)

  • Compute at Sea (Offshore data centres)

  • AI-Powered Consumer Products for 1 Billion People

  • AI for the Ageing Population

  • New Operating Systems for the Physical World

  • The Best Time to Build in Crypto (stablecoins, agentic commerce)

  • Data for the Real World

  • Proving You're Human

  • AI-Native Compliance Infrastructure

  • Self-Maintaining APIs

1yr ago

YC deadline in <2 weeks; Who's applying?

If you're applying, reply below with what you're building so we can cheer you on!

If you're doing a startup and not applying, why aren't you applying?

7mo ago

Y Combinator offers 7 startups ideas they want to fund (Spring 2026)

As usual, Y Combinator came up with segments that are worth investing:

1. Cursor for Product Managers
2. AI-Native Hedge Funds
3. AI-Native Agencies
4. Stablecoin Financial Services
5. AI for Government
6. Modern Metal Mills
7. AI Guidance for Physical Work 8. Large Spatial Models 9. Infra for Government Fraud Hunters 10. Make LLMs Easy to Train

4mo ago

🚨 Miss the YC deadline? There's still a shot

We've teamed up with @Y Combinator or to give builders one more chance.

Launch on Product Hunt this Friday, tag your post "YC application" @gustaf will personally review the top launches. One or more will walk away with a YC interview, even though the official deadline has passed.

10mo ago

What are your good takeaways and useful tips when raising money?

I have come across several statements such as: a single person cannot raise money on their own (you need to be in a team of at least 2 people), it is not worth it because there is pressure on you, etc.

  • What is your experience with raising money?

  • What did it give you, and who did you raise it from?

  • What do you think helped you to a large extent to get the raise?

1yr ago

YC founders, would you trust AI to handle 90% of your support chats?

me and my co-founder are building an AI agent because at our last startup we just couldn t keep up with support.

we tried every chatbot out there. they all felt robotic. customers hated it.

hiring more people was too slow + too $$$

so we put together this ai chatbot (think intercom fin but deeper) that trains on your old tickets, learns your tone, doesn t hallucinate, and can actually answer stuff like a real support rep.

12mo ago

Drop out of school and start a startup or do business after graduation? (Possible solution)

3 days ago, I was wondering what the future of universities would be in this AI world (and education in general).

I didn't know that YCombinator was going to bring an alternative solution:

5mo ago

YCombinator highlighted 8 standout startups they chase (List Winter 2026 Demo day)

At YC, investors outlined 8 startups across space, AI, gaming, and agriculture (most of them want to bet on futuristic ideas, e.g. space), and these sparked interest in funding them.

This was the pick:

  1. Beyond Reach Labs satellite solar arrays that expand from table-size to football-field size in orbit
    Est. valuation: ~$100M+

  2. Byteport next-gen file transfer protocol
    Est. valuation: ~ $30M

  3. Hex Security AI agents that continuously hack your system to find vulnerabilities (Rev.: $1M+ run-rate in 8 weeks)
    Est. valuation: ~$100M+

  4. Grazemate autonomous drones that herd cattle, track weight, and monitor land
    Est. valuation: ~ $30M

  5. GRU Space moon factory turning lunar soil into buildings (starting with a moon hotel)
    Est. valuation: ~$100M+

  6. Luel marketplace for real-world human data (video/audio) to train AI models (Rev.: ~$2M ARR in 6 weeks)
    Est. valuation: ~$100M+

  7. Pax Historia AI strategy game where players rewrite history (e.g. Rome never falls) 35K daily users
    Est. valuation: ~ $30M

  8. Stilta AI agent for patent lawyers (search + analyse IP faster, cheaper)
    Est. valuation: ~ $30M

1yr ago

How to reach your target audience and stand out to LLMs

This story is published in the Product Hunt Weekly Newsletter. If you'd like to read more stories like this, subscribe here.

12mo ago

9 most in-demand startups from YC Demo Day

A week ago, Y Combinator held its Summer 2025 Demo Day in San Francisco, showcasing over 160 startups and highlighting 9 highly focused ones.

TL;DR: The most trending were AI-focused, specifically AI agents.

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