Protagonist

@ProtagonistXYZ

Protagonist is the firm we wish we'd had—so we built it. We invest in and incubate businesses alongside the few who force the future forward.

Miami, FL

protagonist.co

Joined May 2022

Protagonist
@ProtagonistXYZ
Jul 16
👋 Meet Prometheus 📍 HQ: San Francisco, CA 👥 Leadership: Jeff Bezos (@JeffBezos) and Vik Bajaj (@vik_bajaj) 🌐 Website: prometheus.ai 🚀 Vision & Opportunity: AI for the physical economy, developing artificial intelligence tools that improve the engineering and
Protagonist
@ProtagonistXYZ
Feb 11
👋 Meet Levl (@LevlFi) 📍 HQ: London, UK 👥 Leadership: Jaisel Sandhu 🌐 Website: Levl.ch 🚀 Vision & Opportunity: Levl’s mission is to democratize access to modern financial infrastructure by bridging traditional payment systems with new digital rails. Levl
Protagonist
@ProtagonistXYZ
Feb 4
On Monday, @xai was acquired by @SpaceX to accelerate humanity’s future. Protagonist is thrilled with the incredible progress that Elon and team have made, and could not be more excited to see what the future holds. Media outlets reported the combined company value at $1.25
Protagonist
@ProtagonistXYZ
Dec 8, 2025
👋 Meet Radical 📍 HQ: San Francisco, CA 👥 Leadership: Simone Korsgaard Jensen 🌐 Website: radicalhealth.ai 🚀 Vision & Opportunity: Radical Health is developing an AI Oncologist designed to bring expert-level cancer care to anyone, anywhere. 💸 Round: Pre-Seed
Protagonist
@ProtagonistXYZ
Nov 24, 2025
👋 Meet Fifth Door 📍 HQ: San Francisco, California 👥 Leadership: Daniel Kan (@danielkan) and Amir Ghazvinian 🌐 Website: fifthdoor.com 🚀 Vision & Opportunity: Fifth Door is building an AI-powered creative platform that transforms ideas into interactive games