Riften
Earned intelligence for every company
YC Summer 2026Developer ToolsReinforcement LearningInfrastructureAI
About Riften
Riften builds model routing, evaluations, private models, and training environments for AI labs, AI-native companies, and enterprises. We help teams choose models for their workloads, evaluate how they perform, and build private models around company-specific work. We’re also developing coding environments where agents learn through backend engineering tasks.
Founder
Carl Stauffer
Founder
Founder and CEO of Riften. Palantir’s first Neurodivergent Fellow through Alex Karp’s program: Forward Deployed Engineer embedded with a nine-figure manufacturing account and building systems across purchasing and production. a16z Scout. Former nuclear researcher at Jefferson Lab. CS and AMS at Johns Hopkins.