Rasyn
YC S26 · Active · Making chemicals 100,000x faster
Competitors
| Company | Category | Status | Program |
|---|---|---|---|
 Ligo BiosciencesShared: deep learning, biotech, chemicalActiveAI | AI | Active | YCS24 |
 MemorableShared: search problemActiveAI, Devtools | AI, Devtools | Active | YCS27 |
Adjacent
| Company | Category | Status | Program |
|---|---|---|---|
 SynviviaShared: manufacturing, biotech, chemicalActiveAI | AI | Active | YCS16 |
 Cash Flow PortalShared: grown quickly, quickly becauseActiveOther | Other | Active | YCW22 |
 Numerion LabsShared: deep learning, biotech, chemistryActiveAI | AI | Active | YCW15 |
 Lavo Life SciencesShared: biotech, formulation, trialInactiveAI | AI | Inactive | YCW23 |
 OverviewShared: deep learning, manufacturing, problemActiveAI | AI | Active | YCW19 |
Also from S26 in AI
All of S26
Founders
- Ansh TiwariFounder/CEO
- Ayush ChauhanFounder/CTO
- Daood HashmiFounder
About Rasyn
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. 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
- S26 · Summer 2026
- Status, per YC
- Active
- Category
- AI
- Team size
- 3
- Location
- San Francisco, CA, USA
- Founded
- 2025
- Checked
- 1h ago
YC tags: Artificial Intelligence, Deep Learning, Biotech, Manufacturing
Rasyn: questions
Which YC batch was Rasyn in?
Rasyn was in Y Combinator's Summer 2026 batch (S26).
Is Rasyn still active?
Y Combinator lists Rasyn as active.
Who founded Rasyn?
Rasyn's founders, as listed on its YC page: Ansh Tiwari (Founder/CEO), Ayush Chauhan (Founder/CTO), Daood Hashmi (Founder).
Where is Rasyn based?
Rasyn lists San Francisco, CA, USA as its location on YC's directory.
Sources: each program's public company list, read twice a week. Not affiliated with Y Combinator or any other program. Logos via logo.dev; trademarks belong to their owners.