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Rasyn launch: what they're building and where to launch next

FoxPlug writes launch posts from what a startup ships and matches it to the launch communities that fit it. This page shows what Rasyn is building and where it could launch next; if it is your startup, start free below.

What they're building

Making chemicals 100,000x faster

Batch
Y Combinator Summer 2026
Industry
Healthcare
Team size
3
Based
San Francisco, CA, USA

Founders

rasyn.ai ↗

See their funding details ↗

Rasyn on the record

What they shipped

  • From its YC profile: We builds 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. (source)
  • Its own site describes it as: "Tell Marigold what you need and it does the work, so you can focus on the science." (source)

Who is behind it

  • Ansh Tiwari, Founder/CEO: Co-Founder/CEO at Rasyn (S26) (source)
  • Daood Hashmi, Founder: Founder at Rasyn. Currently a researcher in the Arnold and Marcus Lab at Caltech, working with a Nobel Laureate to build diffusion models that predict organic reaction mechanisms and propose novel synthetic pathways. Previously ran DFT and molecular dynamics simulations in the Goddard Lab. Chemical Engineering at Caltech. (source)

Timeline

  1. 2025: founded, per its YC profile. (source)

Other Healthcare and biotech launches on FoxPlug

  • Omanta: A research lab for one
  • Panacea: AI-Native FDA Regulatory Services
  • Plena Health: Plena is the AI operating system for specialty medical practices

Where else to launch Rasyn

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