2025 is shaping up to be the "year of AI agents". We've put together a list of startup ideas that we think are especially promising— some draw attention to trends that are already in full swing, and some of them are where we think things are going next. ycombinator.com/rfs
Full-stack AI companies @snowmaker If you build a great AI accountant, why sell it to legacy accounting firms when you could start an AI accounting firm and beat them? We think founders will increasingly choose to do just that, and we're excited to fund more of these full-stack AI companies.
More Design Founders @aaron_epstein As AI tools make coding easier, great design and taste matter more than ever. That's why more designers should become founders. Don't just design products – create companies.
Voice AI @gustaf Phone calls with businesses haven’t changed in decades—until now. Voice AI bots, powered by LLMs, are finally as good as humans. It’s the autonomous car moment for voice.
AI for Scientific Advancement @sdianahu AI is transforming how physical things are made. Many scientific tools haven’t changed in decades, but test-time compute is now enabling new startups to solve complex problems in fields like chemistry, biology, and materials science.
AI Personal Assistant @t_blom It’s high time we had AI personal assistants. Imagine an AI that has perfect understanding of your emails, projects, and scheduling preferences — and can take actions on your behalf. Apply to YC if you’re working on this idea!
AI Personal Tutor for Everyone @harjtaggar The latest multimodal and reasoning models make it possible to create an AI personal tutor that’s capable of explaining complicated concepts to anyone who’s interested in learning them. This could really change the world. We’d love to see you apply to YC if you’re working on this idea.
@ycombinator @t_blom This is exactly what I thought the other day even started coding a prototype and then thought — shouldn’t that be Siri? Tim Cook not cooking
@ycombinator @t_blom im building this as we speak x.com/jsontsx/status…
@ycombinator @t_blom im building this as we speak x.com/jsontsx/status…
@ycombinator @t_blom One place AI assistants could really help is activity planning. People with busy lives need help figuring out their weekends. Plan events with my family based on our preferences. Suggest trips I can approve or reject. Organize fun stuff with friends that fits our budget.
@ycombinator @t_blom gosh this is exactly what we have built in the last year at saner.ai ! Intresting time ahead
@ycombinator @t_blom @t_blom @ycombinator we have applied with @trycandle_ai - an ai assistant for knowledge workers, starting with lawyers.
@ycombinator @t_blom This exists but you guys rejected us! skej.com
@ycombinator @t_blom Hey @t_blom I'm building something similar to what you described with 2 other founders. How can we get in touch. An AI personal Assistant app * AI powered productivity APP. All three of us founders are technical founders.
@ycombinator @t_blom @t_blom I got the chills watching this because it's directly what we've been discussing and building at gavna.com for the 14 months. Excited to show you more about this!
@ycombinator @t_blom Hi @t_blom, We’re building exactly the AI Assistant you’ve imagined. It works alongside you on your MacBook—using the keyboard and mouse just like you do. Most importantly, it can operate any app installed on your Mac, including those accessed through the browser.
@ycombinator @t_blom @t_blom #TruAI won't have access to emails or be able to take online actions, but she can remember your preferences, schedule, and even what's in your junk drawer in the kitchen. We should talk more in depth when you can! #Solofounder #DECACORN
