Y Combinator W26 Afterparty

Now that we've made it past YC Demo Day, come celebrate the end of the YC Winter 2026 batch with other YC Founders at the Newmark's Sky Lounge at One Sansome in San Francisco!

Free drinks, live DJ, great people, and good vibes.

Co-hosted with our friends at

• Fondo - the all-in-one accounting platform for startups. We help 1,000+ startups put their bookkeeping, taxes, and tax credits on autopilot.

• Newmark - a leading commercial real estate advisor and service provider.

• Moda (YC W26) - a reliability and monitoring layer for AI agents that surfaces patterns in hallucinations, tool call failures, and user frustration.

Special thanks to our title sponsor, Microsoft for Startups!

• Microsoft help startups:

  • Build fast: discover scalable AI tools that help cut costs and future-proof their business

  • Scale smart: deploy with peace of mind with a cloud designed for enterprise-ready scale and security

  • Sell more: boost go-to-market success with access to the Microsoft global network of customers

Our additional event sponsors include:

• ElevenLabs - a research-led software company specialising in advanced generative AI for audio.

• Fireworks AI - a leading inference and infrastructure platform designed to deploy generative AI models at scale with ultra-low latency.

• Clerk - a leading Authentication-as-a-Service platform that provides developers with pre-built UI components and full-stack user management.

  • Current YC Batch receives a full year of Clerk for free. YC Alumni receive 50% off. Click here for the offer.