PerfectBit, Inc.
PerfectBit, Inc. is a YC Spring 2026 (P26) company. Based in San Francisco, CA, USA. Team of 2.
About PerfectBit, Inc.
Summary
PerfectBit, Inc. builds high-quality training data for AI models by verifying outputs against physics simulators, scientific databases, and formal proof systems. Most large language models are pre-trained on noisy, web-scraped text that causes hallucinations and failures on well-defined tasks; PerfectBit replaces that data with synthetically generated, correctness-guaranteed examples. Its target applications span robotics, LLMs, and AI for science.
Go-to-market
PerfectBit sells to AI labs and research teams that train or fine-tune foundation models, robotics systems, and scientific AI, replacing reliance on raw web-scraped corpora with curated, verified datasets.
From the Y Combinator listing
Correct by construction AI training data
We create a new kind of data for training AI models. Most LLMs are pre-trained on noisy web-scraped text, but they hallucinate and still fail on tasks that humans find trivial. PerfectBit creates high-quality training data that's correct by construction. We verify against physics simulators, scientific databases, formal proof systems. LLMs, robotics, AI for Science, and more.
Facts
- B2B / B2B
- San Francisco, CA, USA
- 2
- Active
- Early
Founders (2)
- Peter Vajda
- Seiji Yamamoto
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