AI infrastructure

Riften

Website
Founded 2026Origin source ↗Checked 2026-09-15

Overview

Riften is an independent AI research lab exploring intelligence in software and the physical world.

We study how models learn and represent knowledge, and build systems that put that research to work. Our work spans model routing, evaluations, post-training, and physical AI.

Earned intelligence.

Company description As recorded 2026-11-08

Founders & team

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.

Founder profile As recorded 2026-09-15
5team members reported
Source-reported As recorded 2026-09-15

Founded 2026 · Source

News & product activity

Sources & observations

Y Combinator

Profile depthenriched profile
Website observationwebsite reachable
Last website check2026-11-11
Location · source statedSan Francisco, CA, USA
Pricing evidenceNo pricing page confirmed
Maturity: Not assessed · 3 of 6 areas documented

Source-based assessment · automated evidence rules

The retained text does not establish product availability or customer use.

Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.

Stage definitions
independent websitesource corroborationreachable websitedescriptive evidenceclassified market and modelsourced peoplesourced founding yeardocumentation observed