s25
(3)
NOSO LABS
NOSO LABS builds AI agents for field-service technicians in home-services trades - starting with HVAC, plumbing, electrical, and pest control. Its agents automatically follow up on unsold estimates over text, sync notes to the CRM, and route complex jobs to a back-office dashboard, aiming to recover revenue that would otherwise slip through the cracks without adding headcount. Founded in 2025 by Winston Chi and Alex Xi, the San Francisco company is part of Y Combinator's Summer 2025 batch.
Pingo AI
Pingo AI is a San Francisco language-learning startup building an AI companion that teaches people to speak new languages through real, spoken conversations rather than flashcards and drills. Launched in January 2025 and backed by Y Combinator (S25), the app pairs learners with an AI tutor that sounds like a native speaker, guides them through everyday scenarios, gives real-time corrections, and remembers their progress. It grew from zero to hundreds of thousands of paying users and millions in annual recurring revenue within its first year and was named a Google Play Best of 2025 winner.
Reacher
Reacher is an AI-powered platform that automates creator marketing for TikTok Shop, Instagram, and YouTube - turning the chaos of influencer outreach, sample logistics, and affiliate tracking into a single workflow. Founded in 2024 by Jerry Qian and Bora Mutluoglu, the YC S25 startup serves brands like Under Armour, Hanes, and Logitech, claiming 1,000+ brands and 3.4M+ indexed creators.