1stCollab

1stCollab is a San Francisco-based, AI-powered influencer marketing platform (YC W23) that automates the entire creator-campaign workflow - sourcing creators, outreach, negotiation, contracts, payments, and taxes - while optimizing for ROI. Founded in 2022 by ex-Pinterest leaders Leon Lin, Varun Bansal, and Andrew Liu (with Carina Cater leading influencer strategy), it connects thousands of creators each week with brands like Notion, Character AI, Quora, Framer, and Gamma, letting marketers do in hours what once took teams months.