Summary:
YC's Summer 2025 Demo Day featured over 160 startups, with a focus on AI agents and infrastructure.
Autumn simplifies Stripe integration for AI startups, potentially becoming a major fintech player.
Dedalus Labs automates AI agent deployment, cutting development time significantly.
Getasap Asia, founded by a teenager, is a high-revenue distributor in Southeast Asia with strong investor interest.
RealRoots uses AI for friend matching, generating nearly $800k in monthly revenue.
Solva automates insurance claims, achieving $245k ARR quickly after launch.
Perseus Defense is developing affordable counter-drone missiles for military use.
Pingo AI provides AI language tutoring with rapid growth and high monthly earnings.
Y Combinator recently hosted its Summer 2025 Demo Day, featuring over 160 startups. While AI continues to dominate, this batch showcased a shift towards AI agents and the infrastructure supporting them, including voice AI and monetization tools for the AI economy.
We consulted YC-focused investors to identify the most buzzworthy startups. Here are the top picks:
Autumn
What it does: Stripe for AI startups Why it's a favorite: Managing complex AI pricing on Stripe is manual and time-consuming. Autumn offers an open-source infrastructure that simplifies this, already used by hundreds of AI apps and 40 YC startups. Could this be the next big fintech success?
Dedalus Labs
What it does: Builds Vercel for AI agents Why it's a favorite: Automates infrastructure for AI agents, reducing coding from hours to clicks with features like autoscaling and load balancing.
Design Arena
What it does: Crowdsource rankings of vibe-coded designs Why it's a favorite: Solves the problem of evaluating AI-generated designs by crowdsourcing feedback, improving AI models with input from major AI labs.
Getasap Asia
What it does: Tech-enabled distributor for retailers in Southeast Asia Why it's a favorite: Founded by a 14-year-old, it delivers supplies in under 8 hours, has millions in revenue, and secured funding from General Catalyst with a high valuation.
Keystone
What it does: AI engineer that fixes bugs in production Why it's a favorite: Founded by a 20-year-old AI master's graduate, it reduces software breaks and has already rejected a seven-figure acquisition offer.
RealRoots
What it does: AI matchmaker for female friends Why it's a favorite: Addresses loneliness with AI-organized social experiences, generating $782,000 in revenue last month from 9,000 paying clients.
Solva
What it does: Automates insurance claims with AI Why it's a favorite: Handles routine tasks for adjusters, preventing improper payouts and amassing $245,000 in ARR just 10 weeks after launch.
Perseus Defense
What it does: Counter-drone mini-missiles Why it's a favorite: Develops cost-effective solutions for the U.S. military to counter drone swarms, with demonstrations already underway.
Pingo AI
What it does: AI foreign language tutor Why it's a favorite: Offers conversational practice with AI native speakers, growing 70% monthly and earning $250,000 in monthly revenue.
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