Y Combinator’s Demo Day has long been the launchpad for some of the world’s most transformative startups. But this year’s event was historic: for the first time ever, YC hosted a spring cohort and the spotlight was firmly on artificial intelligence. Among the dozens of ambitious teams, AI agent startups stole the show, offering a glimpse into the next wave of automation, productivity, and digital intelligence.

AutoPilotAI is building fully autonomous enterprise workflow agents that can manage repetitive back-office tasks, from invoice processing to HR onboarding. Their plug-and-play platform promises to save companies thousands of hours annually, with seamless integration into existing SaaS tools.

Targeting developers, CodeSmith Agents offers AI-powered coding assistants that go beyond code completion. These agents can autonomously build, test, and debug entire software modules, accelerating product development for startups and enterprises alike.

PersonaGenie is revolutionizing customer service with emotionally intelligent AI agents capable of handling complex queries across voice, chat, and email. Their agents adapt tone and language in real time, delivering a truly human-like support experience.

LegalMind’s AI legal agents can draft, review, and summarize contracts, conduct due diligence, and even flag compliance risks. Law firms and in-house legal teams are already piloting the platform to streamline operations and reduce costs.

MarketMuse AI empowers marketers with agents that autonomously research, draft, and optimize content for SEO and social media. Their analytics-driven approach helps brands stay ahead in the fast-paced world of digital marketing.

MedAssist is tackling healthcare inefficiencies with AI agents that handle patient triage, appointment scheduling, and insurance verification. Early trials show reduced wait times and improved patient satisfaction in busy clinics.

SupplyChainX deploys AI agents to monitor, predict, and resolve disruptions in global supply chains. Their real-time intelligence dashboard is already attracting interest from major logistics and manufacturing firms.

FinBotics delivers AI-powered financial advisors for the masses. Their agents provide personalized investment advice, automate portfolio rebalancing, and offer 24/7 support all at a fraction of the cost of traditional advisors.

TutorLoop’s AI tutors offer personalized, interactive learning experiences for K-12 and college students. The agents can adapt to each learner’s pace, provide instant feedback, and even generate custom quizzes on demand.

EventPilot AI is transforming event management with agents that automate everything from attendee registration to real-time Q&A moderation. Organizers can focus on strategy while AI handles the logistics.

Y Combinator’s first-ever spring Demo Day was a testament to the explosive growth and diversity of AI agent startups. These teams are not just building tools they’re creating autonomous digital colleagues that promise to reshape industries from law and healthcare to finance and education.

Investors are taking notice, with several startups reportedly closing multi-million dollar seed rounds within hours of their Demo Day pitches. As AI agents become more capable and accessible, the line between human and machine collaboration is blurring ushering in a new era of productivity and possibility.