🚀 Y Combinator×❄️ Spring 2025

YC Spring 2025: The Dawn of the Vertical Agent Era

145 startups in this batch

What Was YC SPRING 2025?

This cohort emerged during the "Agentic Pivot," a period where the initial hype of LLMs matured into autonomous execution within legacy industries. Macro conditions were defined by a "default alive" mandate, forcing founders to target high-ACV sectors like Insurance and Health Tech where operational inefficiencies were most acute.

What These 145 Startups Built and Proved

The batch proved that verticalized AI agents could penetrate deep-stack enterprise workflows, moving beyond simple chat interfaces to handle complex tasks like COI generation and medical claim appeals. They validated a massive willingness to pay for deterministic AI workflows that replaced manual back-office labor in highly regulated environments.

What Failed and What to Learn From It

Many startups in this era struggled when they focused too heavily on generic context retrieval without owning the underlying system of record. Builders today should learn that a "copilot" is often just a feature; the real value lies in full-stack automation that doesn't require a human-in-the-loop for every transaction.

The Relaunch Opportunity in 2026

The next wave belongs to solo builders creating multi-agent orchestration for niche industrial sectors like chemical engineering or supply chain logistics. By leveraging 2026-era reasoning models, you can automate the compliance and design loops that the S25 cohort first identified but couldn't fully solve with earlier LLMs.

AcoliteYC

active

AI Teammates for Insurance Agencies

📍 New York📅 2025

AI-powered real-time compliance monitoring platform that detects and fixes medical documentation errors before they trigger claim denials or audits.

📅 2020

AegisYC

active

AI Agents to win denied health insurance claims.

📍 San Francisco📅 2025

Context retrieval for AI agents across apps and databases

📍 Unknown📅 2025

AlkaliYC

active

Your Copilot for Building Chemical Projects

📍 San Francisco📅 2025

AlmondYC

active

Robots designed for the era of AI

📍 Unknown📅 2025

Data center infrastructure management software that monitors, controls, and optimizes data center operations through unified monitoring and AI-driven automation.

📍 San Francisco📅 2024

AtlogYC

active

Voice AI That Won't Get You Sued

📍 New York📅 2025

AttuneYC

active

Faster builds, zero effort.

📍 San Francisco📅 2025

Gigascale Nanomanufacturing

📍 Mountain View📅 2025

AuctorYC

active

The agentic operating system for modern system integrators.

📍 New York📅 2025

AI agents for insurance claims operations

📍 Unknown📅 2025

BelugaYC

active

Influencer marketing that converts

📍 San Francisco📅 2025

Voice data for AI

📍 Redwood City📅 2025

The authentication framework for TypeScript

📍 San Francisco📅 2025

The best way to use AI for spreadsheets.

📍 San Francisco📅 2025

BitPatrolYC

acquired

AI-powered code security

📍 New York📅 2025

BlaxelYC

active

The perpetual sandbox platform

📍 San Francisco📅 2025

BloomYC

active

Build and share mobile apps in seconds

📍 Unknown📅 2025

BluejayYC

active

The world's first quality assurance agency for voice & text AI.

📍 Unknown📅 2025

The AI platform for legal reasoning

📍 Boston📅 2025

BondYC

active

Your AI Chief of Staff

📍 San Francisco📅 2025

Robots for the inspection and maintenance of data centers

📍 Boston📅 2025

American drug manufacturing

📍 Cambridge📅 2025

CactusYC

active

24/7 AI Call Center for Home Services

📍 San Francisco📅 2025

The data gateway for agents.

📍 San Francisco📅 2025

Deep space communications as a service

📍 Unknown📅 2025

CascoYC

active

Autonomous security testing for web apps, APIs, cloud, and AI systems

📍 Unknown📅 2025

CaucusYC

shutdown

AI CRM for Government

📍 Unknown📅 2025

The first AI mortgage lender

📍 San Francisco📅 2025

ChironYC

active

Grammarly for Math ✏️

📍 San Francisco📅 2025

ChonkieYC

active

Open Source Data Ingestion For AI

📍 Unknown📅 2025

chrtYC

active

chrt is a logistics platform for time-critical shipping

📍 Unknown📅 2025

CladoYC

active

Deep Research for People

📍 San Francisco📅 2025

AI Revenue Platform for Post-Acute Care

📍 New York📅 2025

ClarmYC

active

Sales for developers

📍 San Francisco📅 2025

CleonYC

active

AI Phone Agents

📍 New York📅 2025

ClideyYC

active

Removing the application layer completely

📍 San Francisco📅 2025

Modernizing the police workflow.

📍 San Francisco📅 2025

The agentic CRM for blue-collar services

📍 New York📅 2025

AI coworker for tax teams

📍 Unknown📅 2025

CotoolYC

active

Cloud-based platform providing customizable AI agents and co-pilot for automating security investigations, detection engineering, and threat hunting.

📍 San Francisco📅 2025

CrimsonYC

active

The AI Associate for Litigation Lawyers

📍 London📅 2025

CuaYC

active

Docker for Computer-use Agents

📍 Unknown📅 2025

cubicYC

active

AI-powered code review platform

📍 London📅 2025

DeltyYC

active

Transforming healthcare operations with AI agents

📍 Unknown📅 2025

DenYC

active

Cursor for knowledge workers

📍 Unknown📅 2025

DocketYC

active

AI agents for web testing

📍 San Francisco📅 2025

DolphinYC

active

Dolphin is a startup in a box.

📍 New York📅 2025

The AI Operator for Financial Services

📍 San Francisco📅 2025

AI-native operating system for vehicle fleet management

📍 Unknown📅 2025

We supply hard tech companies with critical components.

📍 Unknown📅 2025

FrekilYC

active

Intelligence Layer for Real World Clinical Data

📍 San Francisco📅 2025

Personal AI healthcare agent, powered by clinical and wearable data.

📍 Unknown📅 2025

GodelaYC

active

AI Physics Engine to replace simulations and prototypes

📍 San Francisco📅 2025

GolfYC

active

Security for enterprise MCP servers.

📍 Unknown📅 2025

Vertical AI for highly-regulated manufacturing

📍 San Francisco📅 2025

HABITYC

active

Conversational robots for physical businesses.

📍 El Segundo📅 2025

HelixDBYC

active

The fastest & most scalable graph-vector database on the market

📍 London📅 2025

HemutYC

active

AI-powered operating system for trucking companies.

📍 San Francisco📅 2025

Understand your users beyond the numbers

📍 San Francisco📅 2025

JanusYC

active

Evaluate AI Agents with Simulation Environments

📍 San Francisco📅 2025

Building reinforcement learning environments

📍 San Francisco📅 2025

AI Driven EPC - Weld Fabrication Contractor

📍 Unknown📅 2025

KaelioYC

active

A modern, AI-native alternative to Metabase and Looker

📍 Unknown📅 2025

KaizenYC

active

Automate anything on the web.

📍 Unknown📅 2025

Kanava AIYC

shutdown

Your First AI Sales Hire for Wholesale Distributors

📍 San Francisco📅 2025

Simulation Engine for Benchmarking AI Products

📍 San Francisco📅 2025

KestralYC

active

We automate your entire product development lifecycle.

📍 San Francisco📅 2025

AI manager for physical stores

📍 New York📅 2025

Open source MCP integration platform for reliably tool use at scale.

📍 Unknown📅 2025

LabricYC

active

The data layer for scientific research

📍 San Francisco📅 2025

LapelYC

active

Scale personalized service to every customer.

📍 Unknown📅 2025

LeerooYC

active

Organizational Superintelligence

📍 Unknown📅 2024

AI platform to train frontline workers to operate and fix issues

📍 Unknown📅 2025

LucisYC

active

Function Health for Europe

📍 Paris📅 2025

LumariYC

active

AI Digital Workers for Supply Chain

📍 San Francisco📅 2025

LyraYC

active

AI native meeting platform

📍 San Francisco📅 2025

Make Industrial Robots Learn Like Humans

📍 New York📅 2025

MesmerYC

active

Cursor for CTOs

📍 San Francisco📅 2025

Autonomous Security Agents

📍 Unknown📅 2025

MinervaYC

active

AI native accounting firm

📍 Unknown📅 2025

mlopYC

active

Experiment tracking for training ML models

📍 San Francisco📅 2025

AI financial auditors

📍 Paris📅 2025

MorphikYC

active

Open-source multimodal search for AI apps

📍 San Francisco📅 2025

Software tool for designing robots and machines

📍 Unknown📅 2025

AI data IDE

📍 Unknown📅 2025

🪸 AI consumer social

📍 Unknown📅 2025

Automatically write and update internal docs with every code commit.

📍 Unknown📅 2025

NomiYC

active

Realtime Sales Copilot

📍 San Francisco📅 2025

Swarm robotics and full AI-command hierarchy integration

📍 San Francisco📅 2025

AI employees that automate medical operations for clinics.

📍 Unknown📅 2025

OpineYC

active

Opinionated AI

📍 London📅 2025

AI for Field Inspection Reports

📍 Unknown📅 2025

Managed GPU-accelerated Spark + SQL at 2x speed and half the cost

📍 New York📅 2025

Automated document package parsing for investment & underwriting teams

📍 London📅 2025

PartclYC

active

Design a chip in minutes

📍 Unknown📅 2025

Accelerating data analysis for research

📍 San Francisco📅 2025

PgDogYC

active

Scaling engine for PostgreSQL

📍 Remote📅 2025

AI-Powered Optical Consulting & Software

📍 Unknown📅 2025

PlexeYC

active

Open-source agents to build predictive ML models from a prompt

📍 Unknown📅 2025

Efficient and compact power supply for AI hardware

📍 Cambridge📅 2025

PrismYC

active

AI for the next generation of media

📍 San Francisco📅 2025

ProboYC

active

We help you get compliant while you focus on your business.

📍 San Francisco📅 2025

Hands off QA via intelligent browser agents.

📍 Unknown📅 2025

QFEXYC

active

24/7 Global Stock Exchange

📍 London📅 2025

AI Mobile App Quality Assurance Tester

📍 San Francisco📅 2025

RaloYC

active

Mortgage platform that automates the process to deliver lower rates and fees by cutting out intermediaries.

RefreshYC

active

Evals and environments for computer use and software engineering work

📍 San Francisco📅 2025

RelixirYC

active

GEO-Native CMS

📍 San Francisco📅 2025

RimbaYC

active

AI to replace manual work in environmental compliance reporting

📍 San Francisco📅 2025

RunRLYC

active

Reinforcement learning as a service

📍 San Francisco📅 2025

AI-powered care coordination for primary care

📍 Unknown📅 2025

Reinventing the trading terminal — one intelligent agent at a time.

📍 Unknown📅 2025

sieveYC

active

AI + human review to solve data cleaning - accessible via API or Excel

📍 New York📅 2025

SimYC

active

Open source platform to build AI agent workflows

📍 San Francisco📅 2025

People Intelligence at Scale

📍 San Francisco📅 2025

Cursor for DevOps

📍 San Francisco📅 2025

AI agents that help you understand your customers' needs

📍 San Francisco📅 2025

High-quality human data for robotics and embodied AI

📍 San Francisco📅 2025

quantum-accelerated AI servers

📍 Unknown📅 2025

Reimagining Pharma Customer Engagement with AI Agents

📍 San Francisco📅 2025

TegoreYC

active

Your new AI-powered math tutor.

📍 San Francisco📅 2025

Text.aiYC

active

Alfi - your group chat with social skills to bring friends closer

📍 San Francisco📅 2025

Post-training Data Research

📍 San Francisco📅 2025

Affordable robotic workers

📍 San Francisco📅 2025

TheoremYC

active

Program verification so even your systems engineers can vibecode

📍 San Francisco📅 2025

ThetaYC

active

Specialized AI for Every Job

📍 San Francisco📅 2025

Automating complex legal workflows with human lawyers in the loop.

📍 San Francisco📅 2025

throxyYC

active

Vertical AI agents that run the sales funnel on autopilot

📍 Unknown📅 2025

AI-optimized ticket resale

📍 Unknown📅 2025

TinfoilYC

active

Tinfoil makes your AI workflows secure, verifiable, and private.

📍 San Francisco📅 2025

TrapezeYC

active

AI-native Zocdoc

📍 Unknown📅 2025

TypeOSYC

active

AI writing you control with your taste.

📍 Unknown📅 2025

Valuemate automates real estate appraisals with AI

📍 Unknown📅 2025

Open-source semi-humanoid dev kit → home data → autonomy → 20h/wk

📍 San Francisco📅 2025

VesenceYC

active

Cursor for Lawyers. Agentic AI in MS Office.

📍 Unknown📅 2025

VoiceOSYC

active

The Voice OS for Productivity

📍 San Francisco📅 2025

VybeYC

active

Secure internal apps. Built by AI in seconds. Powered by your data.

📍 Unknown📅 2025

Play the latest games in your browser with no downloads

📍 San Francisco📅 2025

WillowYC

active

The voice interface replacing your keyboard

📍 San Francisco📅 2024

AI tutor for each student.

📍 Unknown📅 2025

AI-powered robotics for scientific lab automation.

📍 San Francisco📅 2025

ZeroYC

active

AI powered email client that manages your email so you don't have to.

📍 San Francisco📅 2025