Rasyn

<!-- hacklab:yc-profile -- YC company profile Making chemicals 100,000x faster We build foundational AI models for chemistry. Almost nothing you buy is a single chemical. Produc…

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About Rasyn

YC company profile

Making chemicals 100,000x faster

We build foundational AI models for chemistry. Almost nothing you buy is a single chemical. Products like datacenter coolant, GPU thermal paste, paint, and glue are formulations, which are mixtures of around ten ingredients each, and demand for them has grown quickly because of AI and EVs.

Designing a new formulation is essentially a search problem, because there are more possible mixtures than anyone could ever test, and none of them can be predicted in advance. As a result, bringing a single formulation to market today takes three to five years of trial and error in a lab.

Our models predict how a mixture will behave far faster than the standard methods used today, which lets us design new formulations in weeks rather than years, at a fraction of the cost. To prove this, we used them to invent three chemicals that never existed before, including a PFAS-free coolant for datacenters, and we have since synthesized and patented all three.

We are already working with some of the largest manufacturers to design formulations for them, and we are building our own lab to generate the data that will train our next models.

YC batch: Summer 2026
Founded: 2025
Team size: 3
Location: San Francisco
Country: US
Status: Active
Industry: Healthcare
Stage: Early
Tags: Deep Learning, Biotech, Manufacturing, AI
YC partner: Ankit Gupta

Founders

Ansh Tiwari — Founder/CEO

Building AI for scientific discovery | Physics @ Caltech, ex-NASA, Author of 3x ICML papers | Masason Foundation Member

LinkedIn · X

Ayush Chauhan — Founder/CTO

AI for chemical discovery | ex-Speechify (50M+ users) & 2x YC engineer | NeurIPS-published ML research, used by OpenAI & Meta

Daood Hashmi — Founder

Researching in the Arnold and Marcus Lab at Caltech