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Ditto Biosciences

YC W26

San Francisco, US · Founded 2025 · 3 employees · 11 known investors

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Ditto Bio uses AI to identify protein candidates from parasites and pathogens for treating autoimmune diseases. The company mines natural compounds from viruses, ticks, and worms whose immune-modulating properties have evolved over millions of years.

AI & Machine LearningBiotechHealthtechUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (W26)

Ditto Biosciences was founded in 2025 by Dennis Sun, Adair Borges, and Emily Weiss.

DSDennis Sun
Dennis SunCofounderDennis Sun holds a degree in evolutionary and developmental biology from Harvard and a PhD from UC Berkeley. He previously served as Chief of Staff at a biotech company, where he oversaw software teams, product development, and scientific partnerships.
ABAdair Borges
Adair BorgesCofounderAdair Borges holds a PhD from UCSF and has published extensively in parasitology, virology, and genomics. She is a coinventor on patents for anti-CRISPR proteins, previously served as a Miller Fellow at UC Berkeley, and led a venture creation team at an early-stage biotech company before founding Ditto Biosciences to develop therapeutics for autoimmune disease.
EWEmily Weiss
Emily WeissCofounderEmily Weiss holds a PhD in microbiology, genomics, and plant genetics with expertise in sequencing, screening, and computational analysis. She previously worked at Illumina and DuPont and has published research in Nature Microbiology and eLife; at Ditto Biosciences, she leads platform development for parasite-derived therapeutic engineering.

Investors · 11

Pioneerlisted by PioneerToronto, Ontario

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Y Combinatorlisted by Y CombinatorSan Francisco · $500K

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Alumni VenturesreportedManchester · $100K – $10M

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BO LE VENTURESreportedGlen Head

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Flex Capital PartnersreportedSan Francisco · $500K – $2M

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Level2 VenturesreportedAmsterdam · $200K – $5.4M

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OurCrowdreportedJerusalem

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Phoenix FundreportedNew York

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Residualreported

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SuperorganismreportedNew York

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Companies working in the same space as Ditto Biosciences.

Legal entities · 1

corporate structure
Ditto Biosciences, Inc.

In the news

Ditto Bio – Evolutionary therapies for autoimmune diseaseycombinator.com · Feb 2026

Frequently asked questions

What does Ditto Biosciences do?
Ditto Bio uses AI to identify protein candidates from parasites and pathogens for treating autoimmune diseases. The company mines natural compounds from viruses, ticks, and worms whose immune-modulating properties have evolved over millions of years.
Who founded Ditto Biosciences?
Ditto Biosciences was founded by Dennis Sun, Adair Borges, Emily Weiss in 2025.
Who are Ditto Biosciences's investors?
Ditto Biosciences's investors include Eight Capital, Pioneer, Y Combinator, Alumni Ventures, BO LE VENTURES, Flex Capital Partners, Level2 Ventures, OurCrowd and 3 more.
Where is Ditto Biosciences headquartered?
Ditto Biosciences is headquartered in San Francisco, US.