PerfectBit, Inc.

YC company profile

Robotics

PerfectBit builds learned policies for robots that do real work. We train manipulation and control policies that hold up outside the lab, in the unstructured environments where real tasks actually happen. Founded by two alumni of Meta's Superintelligence org: Péter Vajda led Media GenAI foundation-model R&D (Emu, Movie Gen, image and video editing), and Seiji Yamamoto led teams in the Core Llama group across LLM pre-training and post-training, inference optimization, and computer vision. We're early, deliberately quiet about the details, and hiring the first researchers who will shape what this becomes. San Francisco, on-site.

• YC batch: Spring 2026
• Founded: 2026
• Team size: 3
• Location: San Francisco
• Country: US
• Status: Active
• Industry: Industrials
• Stage: Early
• Tags: Machine Learning, Robotics, AI
• YC partner: Garry Tan

Founders

Seiji Yamamoto — Founder

Led teams in the Core Llama group at Meta Superintelligence Labs. Senior Staff Research Scientist across 9 years at Meta spanning LLM pre-training and post-training, inference optimization, full-duplex speech models, and computer vision vision models. Before tech: PhD in Physics, published in Proceedings of the National Academy of Sciences and Physical Review Letters, co-authored with Fields Medalist. Educated at Stanford, Rice, Columbia, post-doc at a National Lab.

LinkedIn

Peter Vajda — Founder

I worked as Director of Media Generation at Meta before 2026 for 11 years.
I was managing the Media GenAI foundation model research and development, including efficient media generation, text to image generation (Emu), image editing, Movie gen, text to video, video editing and character consistent image and video generation. Previously, led efficient deep learning for computer vision teams supporting on-device models for AR/VR.
I was Assistant Professor at Stanford University

LinkedIn

Source: Y Combinator · Retrieved 2026-11-02. Company information is self-reported on YC.