Riften
<!-- hacklab:yc-profile -- YC company profile Earned intelligence for every company Riften builds model routing, evaluations, private models, and training environments for AI la…
About Riften
YC company profile
Earned intelligence for every company
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.
- YC batch: Summer 2026
- Founded: 2026
- Team size: 5
- Location: San Francisco
- Country: US
- Status: Active
- Industry: B2B
- Stage: Early
- Tags: Developer Tools, Reinforcement Learning, Infrastructure, AI
- YC partner: Harshita Arora
Founders
Carl Stauffer — Founder/CEO
Founder and CEO of Riften. Former Palantir Forward Deployed Engineer. Former nuclear researcher at Jefferson Lab. CS and AMS at Johns Hopkins.
Source: Y Combinator · Retrieved 2026-11-02. Company information is self-reported on YC.