Prelude

Prelude (operating at prelude.so) is a trust infrastructure platform engineered for the AI age, specializing in mobile onboarding and authentication. Founded in Paris, Prelude helps companies onboard users faster, convert more efficiently, and mitigate fraud before it impacts revenue. Under the hood, the platform unifies device, network, and signup signals into a single onboarding decision via unified APIs, simplifying complex authentication workflows for developers. This allows businesses—from startups to enterprises—to harden cybersecurity defenses, reduce authentication costs, and protect conversion rates without sacrificing user experience. Backed by a $24M Series A funding round led by 20VC, with participation from Singular, Seedcamp, and Deel, Prelude has also introduced specialized products like the Auth API and Intel API to further streamline onboarding and trust layers.