Primer turns a company's ideal customer profile or account list into high-match B2B audiences and pushes them across consumer ad channels like Meta, Google, LinkedIn and Reddit, then measures real pipeline impact with website de-anonymization and holdout testing. Founded in 2019 and based in San Francisco, Primer resolves identities and runs enrichment waterfalls to deliver 3-5x better match rates than CSV uploads, helping growth and ABM teams prove advertising ROI instead of guessing at it.
Maxwell Blumenfeld is the Co-Founder, COO, and Head of R&D at SentiLink, a San Francisco-based identity verification and fraud prevention company he co-founded in 2017 with Naftali Harris after both worked as risk leaders at Affirm. Discovering that synthetic identities with real 750+ credit scores were slipping through the financial system, they built SentiLink into a platform now serving 300+ financial institutions - including three of the top 10 US banks - having verified several hundred million applications. Named to Forbes 30 Under 30 in 2020, Blumenfeld holds a mathematics and economics degree from the University of Chicago and operates from Austin, Texas.
Paulo Martins is the Brazilian-born founder and CEO of Arena (arena.im), a San Francisco-based AI-powered community engagement platform that lets brands embed live chat, live blogs, and audience interaction tools directly on their own websites with a single line of code. After stints at NASA, Ubisoft, and Hulu — where he helped grow the streaming company from 100K to 7 million paying subscribers — Martins founded Arena in 2017 with a clear thesis: businesses should own their audience, not rent it from social platforms. By 2022, Arena had grown to 25,000 customers across 150 countries and closed a $13.6M Series A led by CRV, with backing from heavyweights like David Sacks, Des Traynor, and Olivier Pomel.
Nicolai 'Nic' Ouporov is Co-Founder and CEO of Fleet AI, a startup building reinforcement learning training environments - or 'RL gyms' - that let AI agents practice operating real software tools like Salesforce and Excel before deployment. Fleet raised ~$45M total and grew from $1M to $60M+ annualized revenue in under a year. Nic is also a 3x YoungArts Award winner in photography and visual arts, a former pre-professional ballet dancer trained at Boston Ballet and San Francisco Ballet, and a QuestBridge Scholar from Columbia University. He previously served as Founding Engineer at Respell (acquired by Salesforce in 2024) and published AI research at Stanford's Robotics and Embodied AI Lab.