platoseed
← All companies
TrainLoop logo

TrainLoop

Active

Reasoning Fine-Tuning

Winter 2025Founded 20256 peopleSan Francisco, CA, USA

About

TrainLoop makes it effortless for developers to supercharge LLM performance through reinforcement learning.

Founders Β· 2

Jackson Stokes
Jackson StokesFounder
Google

Cofounder at TrainLoop, previously Google Gemini & AlphaFold performance

Mason Pierce
Mason PierceCofounder / CTO

My background is in applying AI models to business use-cases and have always found fine-tuning to be way harder than it should be - My mission is to unlock fine-tuning for all builders :)

Launch

Launched on Y Combinator Β· Feb 2025
View launch post β†—

Eliminate unwanted responses and match ideal outputs for your product.

TrainLoop offers an accessible platform that uses reinforcement learning techniques used by big AI labs to tune language models for specific business tasks (data curation, training with a reward model, and automated inference). It aims at developers deploying models in production, enabling production-ready, task-focused outputs beyond generic prompts and unreliable results. The launch invites users to join an alpha.

Formerly β€œPhoenix”

B2BEngineering, Product and DesignDeveloper ToolsGenerative AIReinforcement Learning

Related startups

Also in Winter 2025