Who founded Paceline Bio?

Paceline Bio was founded by Andrea Mazzocchi, Ian Miller in 2025.

Who are Paceline Bio's investors?

Paceline Bio's investors include Rebel Fund, Y Combinator, Blast.Club, Constellation, OurCrowd, Wefunder.

Where is Paceline Bio headquartered?

Paceline Bio is headquartered in Boulder, US.

Paceline Bio

YC F25

Boulder, US · Founded 2025 · 3 employees · 6 known investors

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Play Health builds a clinical decision-support platform for healthcare providers to deliver personalized menopause and women's health care. The platform serves primary care physicians and other providers treating women navigating perimenopause and menopause.

Also known as Play Health Inc · Play Health

AI & Machine Learning Biotech Digital Health FemTech Healthtech AI-powered Drug Discovery Drug discovery BiotechnologyUnited States of AmericaAmerica / CanadaPartly Remote

Founders & leadership· Y Combinator alumni (F25)

Paceline Bio was founded in 2025 by Andrea Mazzocchi and Ian Miller.

Andrea Mazzocchi CEOAndrea Mazzocchi is CEO and co-founder of Play Health, which develops clinical decision-support software for women's health and menopause care. Previously, he founded and led Known Medicine, an oncology drug development company acquired by Pathos AI in 2023, and worked in consulting with early-stage companies.

Ian MillerCTO & Co-founderCTO & Co-Founder at Play Health

Investors · 6

Rebel Fundlisted by Rebel FundSan Francisco · $100K – $5M

How we know: Y Combinator's founder network · rebelfund.vc · Not right? Tell us

Y Combinatorlisted by Y CombinatorSan Francisco · $500K

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Blast.Clubreported$5.5M

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ConstellationreportedSan Francisco

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OurCrowdreportedJerusalem

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WefunderreportedSan Francisco

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Related companies · 7

Midi HealthMIDI develops digital health solutions for patients and clinicians to improve access to and delivery of care across diverse populations. The company takes an experimental approach to building tools that address unmet clinical needs.

Atlas DiscoveryAtlasDiscovery develops foundation models of patient drug response trained on pre-clinical and clinical data to improve drug trial design and success rates. The company serves pharmaceutical and biotech firms by predicting human drug responses and enabling drug rescue and development in the biotech industry.

AlixiaAlixia develops therapeutics targeting tumor ecosystems to address cancer drug resistance and age-related diseases. The company integrates biology, biophysics, and computational chemistry to design compounds that disrupt metabolic and inflammatory triggers in multiple cell types within the tumor microenvironment.

ClueClue is a menstrual and reproductive health app that lets people track their periods, cycle, ovulation, fertility, and related symptoms, and contributes anonymized data to scientific research with institutions such as Johns Hopkins and the Gates Foundation. The company offers a paid Clue Plus subscription and serves over 12 million users worldwide.

Evolvere BioSciencesEvolvere BioSciences develops antibiotics using computational models and evolutionary data to target pathogenic bacteria while preserving beneficial microbes, designed to resist the development of bacterial resistance.

SFA TherapeuticsSFA Therapeutics develops oral therapeutic candidates based on deuterated short-chain fatty acids to treat autoimmune and oncologic diseases. The company's lead program, SFA-002, is in Phase 2 development for plaque psoriasis, with additional pipeline assets targeting pancreatic cancer, liver cancer, rheumatoid arthritis, and inflammatory bowel disease.

PeriPeri is a wearable device and app that passively tracks perimenopause symptoms such as hot flashes, night sweats, anxiety, and sleep disturbances, combining symptom, activity, and lifestyle data to deliver personalized management insights. It serves women going through perimenopause and is currently available in the US.

Companies working in the same space as Paceline Bio.

Legal entities · 1

corporate structure

Play Health Inc

Frequently asked questions

What does Paceline Bio do?: Play Health builds a clinical decision-support platform for healthcare providers to deliver personalized menopause and women's health care. The platform serves primary care physicians and other providers treating women navigating perimenopause and menopause.
Who founded Paceline Bio?: Paceline Bio was founded by Andrea Mazzocchi, Ian Miller in 2025.
Who are Paceline Bio's investors?: Paceline Bio's investors include Rebel Fund, Y Combinator, Blast.Club, Constellation, OurCrowd, Wefunder.
Where is Paceline Bio headquartered?: Paceline Bio is headquartered in Boulder, US.