DOSSIER · UPDATED 18 NOV 2025

Loyal

Loyal is developing drugs to extend dog lifespan; we aim to build the defining aging company. Loyal was founded in early 2020 and has raised over $50M from Khosla, First Round Capital, Collaborative Fund, Longevity Fund, Quiet Capital,…

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Founded
2019
Headcount
143
Open roles
1
Last raised
Series C · $100M
SECTION I · THE BRIEF

Inside Loyal

Brief #26590Updated 18 NOV 2025SAN FRANCISCOFIRST ROUND CAPITALSERIES C
Employbl Dossier

Loyal

Loyal is developing drugs to extend dog lifespan; we aim to build the defining aging company. Loyal was founded in early 2020 and has raised over $50M from Khosla, First Round Capital, Collaborative Fund, Longevity…

Founded
2019
Headcount
143
Open roles
1
Last raised
Series C · $100M
Section II · Premium ProfileMembers only
  • 01Engineering interview process at LoyalLocked
  • 02Tech stack & infrastructure choicesLocked
  • 03Culture & day-to-day work styleLocked
  • 04Why join now vs. 6 months from nowLocked
  • 05Hiring focus & open headcount by teamLocked
  • 06Comp philosophy and band contextLocked
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LEADERSHIP

Founders & key people

Celine Halioua

Celine Halioua

Researcher (ORCID 0000-0001-5361-651X)

LoyalThe Longevity FundOisin BiotechnologiesGlobal Healthspan Policy InstituteSanford Burnham Prebys Medical Discovery InstituteThe University of Texas at AustinThe University of Texas at Austin
OPEN ROLES

Hiring at Loyal

FUNDING

Capital raised

Total Amount Raised: $137,075,008

Loyal's Investors

Loyal Funding Rounds

  • Series C

    $100,000,000

  • Series B

    $22,000,000

  • Series B

    $22,000,000

    Series B Investors

    Collaborative Fund
    VALOR

  • Series B

    $45,000,000

  • Debt Financing

    $12,000,000

  • Series B

    $45,000,000

    Series B Investors

    Bain Capital Ventures
    Quiet Capital
    Collaborative Fund
    Khosla Ventures
    The Todd & Rahul Angel Fund
    VALOR
    First Round Capital
    BoxGroup
    Andrea (Andy) Coravos

  • Debt Financing

    $12,000,000

    Debt Financing Investors

    Bridge Bank

  • Series A

    $75,000

  • Series A

    $75,000

    Series A Investors

    High Water Venture Partners

  • Series A

    $20,000,000

  • Series A

    $20,000,000

  • Series A

    $27,000,000

  • Series A

    $27,000,000

    Series A Investors

    Khosla Ventures
    Collaborative Fund
    The Longevity Fund
    First Round Capital
    BoxGroup
    Brianne Kimmel
    Claire Hughes Johnson
    Ashley Mayer
    Predictive
    Quiet Capital

  • Seed

    $11,000,000

  • Seed

    $11,000,000

    Seed Investors

    Ashley Mayer
    The Longevity Fund
    BoxGroup
    Collaborative Fund
    Claire Hughes Johnson
    Brianne Kimmel
    First Round Capital
    Village Global
    Bossa Nova Investimentos
    Pareto Holdings
    Edward Lando
Funding info provided by Diffbot.
TAGS

Categorized in

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Loyal's Investors

Loyal's Industries

Loyal's Tech Stack

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LOCATIONS

Where they work

Loyal Headquarters Location

1841 Market Street, San Francisco, CA, 94103

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