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14,448 startups · 29 programs

Ditto Biosciences

Active · Evolutionary intelligence for autoimmune disease

WebsiteYC profile

Why it ranks

How the rank works
8signal of 100 · rising 8
  • went through YCProgram · this site+4
  • team of 4Team size · YC's directory+3.6

A sum of public facts, not a judgement and not investment advice.

Competitors

OtherAcquiredCoral GenomicsShared: autoimmune disease, therapy, createYC S18San FranciscoStartup →AISFA TherapeuticsShared: autoimmune disease, drug, theseYC S21PhiladelphiaStartup →AIPragma Bio (former VastBiome)Shared: autoimmune disease, bio, drugPlug and PlayUnited StatesStartup →AINosis BioShared: deep expertise, bio, drugAWS GenAI Inaugural cohortStartup →AIInactiveTrident BioscienceShared: protein structure, these, drug discovery and deliveryYC S20San FranciscoStartup →
Companies closest to Ditto Biosciences
Company
Coral GenomicsShared: autoimmune disease, therapy, createYC S18AcquiredOther
SFA TherapeuticsShared: autoimmune disease, drug, theseYC S21ActiveAI
Pragma Bio (former VastBiome)Shared: autoimmune disease, bio, drugPlug and Play Not statedAI
Nosis BioShared: deep expertise, bio, drugAWS GenAI Inaugural cohortNot statedAI
Trident BioscienceShared: protein structure, these, drug discovery and deliveryYC S20InactiveAI

Adjacent

OtherEpana BioShared: autoimmune disease, therapySPC 2025San FranciscoStartup →OtherEntelexo BiotherapeuticsShared: autoimmune disease, drugYC W21IrvineStartup →OtherParcelBioShared: autoimmune disease, protein, therapyYC W24San FranciscoStartup →OtherInactiveForcyte BiotechnologiesShared: discover drug, disease, controlYC W21Los AngelesStartup →AIShiruShared: create proteinYC S19San FranciscoStartup →
Companies next to Ditto Biosciences
Company
Epana BioShared: autoimmune disease, therapySPC 2025Not statedOther
Entelexo BiotherapeuticsShared: autoimmune disease, drugYC W21ActiveOther
ParcelBioShared: autoimmune disease, protein, therapyYC W24ActiveOther
Forcyte BiotechnologiesShared: discover drug, disease, controlYC W21InactiveOther
ShiruShared: create proteinYC S19ActiveAI

Also from W26 in AI

All of W26
AI/dev/fast/dev/fast is the AI-native code forgeYC W26San FranciscoStartup →AI10x ScienceThe AI-native platform for next-generation protein characterization.YC W26San FranciscoStartup →AI21stUI building blocks for the agentic internetYC W26San FranciscoStartup →AIAemonThe Forward-Deployed AI Research EngineerYC W26San FranciscoStartup →AIAgentic FabriqThe control plane for AI agents.YC W26San FranciscoStartup →AIAlt-XBuilding the best venue for private markets exposure.YC W26Los AngelesStartup →
Company
/dev/fast/dev/fast is the AI-native code forgeteam of 4ActiveAI, Devtools
10x ScienceThe AI-native platform for next-generation protein characterization.team of 5hiringActiveAI
21stUI building blocks for the agentic internetteam of 3ActiveAI, Devtools
AemonThe Forward-Deployed AI Research Engineerteam of 3hiringActiveAI, Devtools
Agentic FabriqThe control plane for AI agents.team of 2ActiveAI
Alt-XBuilding the best venue for private markets exposure.team of 2ActiveAI, Data

Founders

  • Dennis SunFounder/CEO
  • Adair BorgesFounder
  • Emily WeissFounder

About Ditto Biosciences

Ditto Bio discovers drugs for autoimmune diseases by harnessing parasite biology. Viruses, ticks, and worms have experimented over millions of years to create proteins that control the human immune system. We use AI to identify these proteins and engineer them into next-generation autoimmune therapies. Our team is three PhD scientists from UCSF, UCSD, and UC Berkeley who have worked together for 3+ years in biotech. We have deep expertise in parasite biology, computational biology, and software for AI-based protein structure prediction

YC batch
W26 · Winter 2026
Status, per YC
Active
Category
AI
Team size
4
Location
San Francisco, CA, USA
Founded
2025
Checked
7h ago

Changes seen

Team sizeOct 5, 2026

Team went from 3 to 4 people.

Source ↗

Ditto Biosciences in W26: 199 companies, 81% AI

LinkedIn

Ditto Biosciences: questions

Which YC batch was Ditto Biosciences in?

Ditto Biosciences was in Y Combinator's Winter 2026 batch (W26).

Is Ditto Biosciences still active?

Y Combinator lists Ditto Biosciences as active.

Who founded Ditto Biosciences?

Ditto Biosciences's founders, as listed on its YC page: Dennis Sun (Founder/CEO), Adair Borges (Founder), Emily Weiss (Founder).

Where is Ditto Biosciences based?

Ditto Biosciences lists San Francisco, CA, USA as its location on YC's directory.