Gutgutgoose YC Application
San Francisco
Gutgutgoose went through Y Combinator in the Summer 2026 batch as a Healthcare company. Below: what the company does, who founded it, and its application to YC, reconstructed question by question in the real YC form.
- YC batch
- Summer 2026
- Industry
- Healthcare
- Location
- San Francisco
- Team size
- 2
- Status
- Active
- Launched
- 2026
Founders
Leon MojarrabiFounder
Anis MihrshahiFounder
What Gutgutgoose does
Most data companies pay for their data. Ours pays for itself. Customers send us a stool sample. We sequence it, build a metabolic model of that gut, and simulate whether each probiotic strain has an open niche it can colonize. We formulate the best candidates, then re-sequence 90 days later to see what actually took hold and what changed. Each cycle gives us the baseline gut, the intervention, and the outcome. At scale, the endgame is models that predict chronic disease years before symptoms.
Gutgutgoose's YC application, reconstructed
Y Combinator application
Gutgutgoose, Summer 2026 batch. The real form questions, answered from public data.
- Founders2
- Company7
- Progress7
- Idea4
- Equity3
- Curious2
- Batch Preference1
Company
Gutgutgoose
We sequence your gut and build the probiotics it's missing
Gutgutgoose is a personalized gut probiotic service. Customers send us a stool sample. We sequence the gut microbiome, build a metabolic model of their gut, simulate which probiotic strains could actually stick, and formulate the best candidates for that person. Ninety days later, we re-sequence to see what changed and iterate if needed. Our product is the end-to-end pipeline from sample to custom formulation and feedback.
We are based in San Francisco, CA, and will stay here after YC.
San Francisco is where the biotech and synthetic biology ecosystem is, plus it's where we live and run the lab today. Staying here is simply more practical for building and scaling the company.
21 more answers in the full application
Founders, Progress, Idea, Equity, Curious, Batch Preference are in the full version. Create a free account to open it in YC Insights, next to every other YC batch.
Frequently Asked Questions
Is this the real Gutgutgoose YC application?
No. Y Combinator keeps submitted applications private. This is a reconstruction: the real YC form questions, answered from Gutgutgoose's public data (launch notes, founder backgrounds, product description). It shows how a company like Gutgutgoose would present itself to YC, not the text they submitted.
What YC batch was Gutgutgoose in?
Gutgutgoose was part of the Y Combinator Summer 2026 batch.
Who founded Gutgutgoose?
Gutgutgoose was founded by Leon Mojarrabi, Anis Mihrshahi.
What does Gutgutgoose do?
We sequence your gut and build the probiotics it’s missing
How do I read the full reconstructed application?
Create a free Round Funded account. The full 26-answer version of Gutgutgoose's application, and every other YC batch, is in YC Insights.
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