What the World’s Top Investors Saw at YC Summer 2025

160 startups, one minute each, one slide. For the first time, see 32 of the Demo Day decks that show how the future of tech is being pitched.

This edition of The VC Corner is different. We are sharing one of the most valuable resources you can find if you care about startups, investing, or building. You will get access to the One Minute Decks of 32 startups from Y Combinator’s Summer 2025 batch (YCS25), exactly the same slides they used on Demo Day in front of more than 1,000 of the world’s best investors.

One-minute Demo Day pitches from Y Combinator’s Summer 2025 batch (YCS25). Over 160 startups presented, and here are slides from 32 companies across AI, fintech, healthcare, and developer infrastructure.

Y Combinator runs four batches a year and is often called the Super Bowl of nerds. It has become one of the most efficient capital markets in the world for innovation, where ambitious founders meet investors with billions to deploy. Demo Day is the ritual at the end of each batch, when founders have just one minute and one slide to convince the room. It is probably the highest concentration of entrepreneurial talent and investor capital you will ever see in a single place.

The Summer 2025 batch was YC’s 43rd Demo Day, and more than 160 startups presented. Over 60 percent of them led with AI in their pitch. Some were building AI-native applications, others were building infrastructure for the next generation of products, and many were tackling trillion-dollar markets in fintech, healthcare, industrial tech, and developer tools.

It is common for some YC companies to raise $5M or even $10M right after Demo Day, sometimes while still pre-revenue. Founders are often very young, working what in Silicon Valley is called the 997 schedule: twelve hours a day, seven days a week. For investors, it is a unique chance to back the most ambitious people in the world at the very start of their journey.

What we know about YCS25

• More than 160 startups presented

• Around 30 percent were building for developers: infrastructure, engineering, product, design

• Major categories: AI, healthcare, fintech, B2B productivity, industrials

• Smaller presence: legal, recruiting, education, government

• Over 60 percent mentioned AI directly in their tagline

Some of the standout companies

Among the 32 startups whose slides we are sharing today are companies such as:

• Pingo AI – AI companion that helps you learn languages

• Solva Technology – automates insurance claims and prevents incorrect payouts

• Hera – AI motion designer for professional animations

• GETASAP Asia – tech-enabled distributor for retailers in Southeast Asia

• Floot – a vibecoding platform for non-coders

• Flai – AI solutions that bring customers to car dealerships

• Wayline – AI voice assistant for property managers

• Veritus – AI agents for the consumer lending industry

• Notte Labs – reliable web agents for enterprises

• Synthetic Society – synthetic users for QA and UX testing

• Motives – consumer focus groups run by AI

• Orange Slice – AI agents that find customers already ready to buy

• Relling – ImageNet for world models trained with raw video data

• Avent – AI agents for industrial commerce

• Pally – intelligent unified inbox and personal CRM

• Eden – autonomous marketing AI for e-commerce

• Prompting Company – helps products get discovered inside ChatGPT

• GhostEye – an AI-powered offensive security team

• SigmanticAI – AI toolchain for chip design

• Slashy AI – AI-native ops layer for workflows

• Altur – voice AI agents for debt collection

• IronLedger.ai – AI agents for property accounting

• Blank Bio – RNA-based AI for better drugs and smarter clinical trials

• Alter – secure access control for AI workflows

• Knowlify – converts text into explainer videos in seconds

• Convexia – pharma company using AI for drug discovery

• MangoDesk – data creation platform for AI

• F4 Industries – automating compliance for engineering drawings

• Frizzle – AI grading for teachers

• Doe Labs – autonomous AI workforce for private equity roll-ups

These are only a few of the most interesting companies in the batch, but they give a sense of the energy, ambition, and breadth of what was presented on stage.

What you will find inside

Right after this paywall you will find something exclusive: the One Minute Slide of 32 startups from the Summer 2025 batch, exactly as they were shown on Demo Day. By studying them you will learn how the best early-stage founders compress their vision, traction, and market opportunity into a single slide, how they frame traction in the simplest possible way, and how they convince investors in less than sixty seconds.

Along with these presentations, you will also get access to everything else we have published in The VC Corner: pitch decks, investor lists, financial models, and every type of startup resources you can image.

YC Demo Day is where the future of startups gets its first pitch. Today, you can study 32 of them: