Robi Lin

Co-founder & CEO, Sepal AI (acquired by Mercor, Feb 2026); now at Mercor · Sepal AIformer

Co-founder and CEO of Sepal AI, sold to Mercor in February 2026. Before Sepal he helped scale Turing's LLM-trainer business, so he has run expert supply at two of the market's vendors.

medium confidenceAt Sepal AI since 2024Updated 2026-09-19

Background

Ex-Bain & Co. At Turing.com he built enterprise workflow products and the fulfilment strategy and scaled the LLM trainer business from 50 to 800+ developers (per YC). He and Kat Hu co-built Turing's technical LLM-training division before founding Sepal in 2024.

What they run now

Post-acquisition role at Mercor not confirmed by a primary source; aggregator listings suggest data delivery.

Career

2026 – presentUnconfirmed (data-delivery role per contact-data aggregators), Mercor
2024 – 2026Co-founder & CEO, Sepal AI
—Consultant (title not confirmed), Bain & Company
—Product & fulfilment, LLM trainer business, Turing

Connections

Kat Hu — co-founder, ex-Turing colleague
Fedor Paretsky — co-founder
Brendan Foody — acquirer's CEO (Mercor)

Who they amplify

Accounts whose posts Robi has reposted recently: Kushal Byatnal, Andrew 'Tre' Treviño, Braden Holstege.

Why it matters here

Knows first-hand how expert benchmark/eval work is scoped, priced and sold to labs, and now sits inside Mercor; a useful informant on how Mercor delivers specialist data, but little direct link to creative work.

How to reach

Speculative: LinkedIn. Ask about pricing and QA for expert-graded benchmarks and what made Mercor buy rather than build.

What we could not establish

Current Mercor title
Education not found
Deal terms

Sources

Also at Sepal AI

former

Fedor Paretsky

Co-founder (technical), Sepal AI; now working on RL environments at Mercor

former

Kat Hu

Co-founder, Sepal AI (acquired by Mercor, Feb 2026)

Robi Lin

Background

What they run now

Career

Recent posts

Connections

Who they amplify

Sources

Fedor Paretsky

Kat Hu