# Riften

[Riften on Hacklab](https://hacklab.so/org/riften)

Startup · 1 person on Hacklab

## Links

- [Website](https://riften.ai/)
- [Y Combinator](https://www.ycombinator.com/companies/riften)
- [LinkedIn](https://www.linkedin.com/company/riftenai/)

## About

<!-- hacklab:yc-profile -->

## 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.

[LinkedIn](https://www.linkedin.com/in/carl-stauffer-314335262/) · [X](https://x.com/carlstauffer_)

[Source: Y Combinator](https://www.ycombinator.com/companies/riften) · Retrieved 2026-11-02. Company information is self-reported on YC.

## Current staff

- [Carl Stauffer](https://hacklab.so/carl-stauffer) — Founder/CEO (Present)