154 startups in this batch
YC Fall 2025 arrived as the "wrapper" era died, replaced by a focus on Agentic Infrastructure and Vertical AI. Macro conditions were defined by a "show me the revenue" mandate, forcing founders to move beyond LLM novelties into deep integration with legacy stacks like manufacturing and enterprise identity management.
This cohort proved that Agentic Permissions and AI-Native Content were high-intent B2B categories. They validated that enterprises were willing to pay for AI that didn't just suggest, but executed—whether that was generating 72-hour ad campaigns at scale or managing least-privilege access for autonomous bots across fragmented toolsets.
Many startups struggled by underestimating the latency of hardware adoption or the fragility of agents in non-deterministic environments. The core failure was often building "generalist" agents that lacked the domain-specific guardrails required for high-stakes industrial or security applications, leading to churn when the AI hallucinated in production.
The 2026 opportunity lies in Vertical Agentic SaaS—taking the infrastructure models pioneered here and applying them to high-compliance niches like healthcare or legal. With today's improved multimodal reasoning, you can now bridge the gap between digital intent and physical execution that Fall 2025 founders first identified.
Secure connectivity hub that enforces employee permissions on AI agents, ensuring least-privilege access across tools and data.
Platform to embed AI copilots into applications for executing complex workflows via natural language.
Superintelligent financial advisor
Carbon Fiber Manufacturing at the Speed of Software
AI-powered market due diligence for investment decisions
Intelligent stereo vision cameras with software-driven 3D perception for robots.
Financial operating system for real estate owners, offering banking, corporate cards, AI optimization, and compliance tools.
High-quality mathematics training data for frontier AI models, created by IMO medalists and elite mathematicians.
AI plug-in that automates HR immigration screening and compliance
Zero-trust authentication, authorization, and auditing for AI agents
AI-powered agentic platform that automates CT scan analysis for oncologists and radiologists to accelerate tumor characterization and treatment planning.
Affordable humanoid robots using artificial muscles to perform household chores at iPhone prices.
The first platform where parents & kids can co-create AI cartoon shows
AI-powered platform that automates regulatory document preparation and consolidation for Investigational New Drug (IND) submissions in biotechnology.
Building the Sobriety Platform for the future of Superintelligence. 🌻
Semantic observability for AI agents to help teams fix failures fast
Continuous AI pentesting that finds and fixes vulnerabilities