Data + environmentsCatalog available · 2

SynthLabs

Post-training research: synthetic data and scalable RL alignment

SynthLabs is a post-training research company combining RLHF with synthetic AI feedback (RLAIF) to build scalable alignment and reasoning pipelines, publishing open research and datasets used in RL post-training.

Team includes founders of the trlX RLHF library

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Websitesynthlabs.ai
DomainsMachine Learning, Alignment, RLHF
LocationSan Francisco
Team size1-10
Founded2023
FundingSeed (M12 and First Spark Ventures, 2024)
FoundersLouis Castricato, Nathan Lile

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Focus areas

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Catalog-evidenced technical capabilities

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Capability catalog

Products and services supported by official company materials. Reviewed 2026-08-16.

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Research programcompany reported

RLHF and RLAIF Research

Post-training research spanning human and AI feedback.

Public / Open
Research
Research programcompany reported

Generative Reward Models

Research on generative reward modeling.

Public / Open
Generative Reward Models

Environments & datasets

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