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RonanRx Inc.

YC S26

San Francisco, US · Founded 2026 · 5 employees · 1 known investors

Find your way into RonanRx Inc.

3,671 people in our graph share verified history with the RonanRx Inc. team — schools, employers, funds. One of them is your warm intro.

Arhaan A.unlockedknows Lloyd Armbrust · together at Y Combinator (overlapped)
×9knows the team · via Y Combinator
knows the team · via Indiana University Bloomington
knows the team · via Macy's

RonanRx offers personalized GLP-1 weight-management care delivered via text, where a licensed physician reviews a patient's history to set an individualized dose, titration schedule, and patient-specific adjunct, and a licensed pharmacist at the patient's selected pharmacy verifies and releases compounded, patient-specific prescriptions. It serves individual patients in the US (availability varies by state) and plans to add hormone therapy (HRT).

Also known as Ronan Rx Inc.

Digital HealthHealthtechWellness & FitnessHealth TechTelehealthTherapeuticsUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (S26)

RonanRx Inc. was founded in 2026 by Lloyd Armbrust and Emily Colman.

LALloyd Armbrust
Lloyd Armbrustin𝕏FounderLloyd Armbrust is a two-time Y Combinator founder who has previously built a manufacturing business and had three company exits. He is the founder of RonanRx, which provides personalized GLP-1 weight-management care and plans to expand into hormone therapy.
ECEmily Colman
Emily Colmanin𝕏FounderCo-founder and COO of RonanRx, which provides personalized, physician-reviewed GLP-1 weight-management care initiated by text. She is a go-to-market operator with over a decade in healthcare sales, most recently at Eli Lilly.

Investors · 1

Y CombinatorSan Francisco · $500K

Competitors · 4

by search overlap
AgelessRx4 shared keywordsAgelessRx offers prescription weight management medications delivered through a telehealth platform, including GLP-1 medications (semaglutide, tirzepatide), FDA-approved weight loss drugs (Wegovy, Zepbound), and supportive treatments like metformin and vitamin injections for adults seeking medically-supervised weight loss.
Walgreens4 shared keywordsWalgreens operates a pharmacy and retail health and wellness business, offering prescription services, over-the-counter medications, health products, and photo services to consumers.
Redsail Technologies4 shared keywordsRedSail Technologies provides pharmacy management systems and integrated pharmacy solutions serving health systems and pharmacy operations across the United States. The company delivers software, automation, and clinical programs to optimize medication management and patient care outcomes in healthcare settings.
Arrive Health4 shared keywordsArrive Health provides in-workflow software that gives clinical care teams real-time insurance, medication cost, and coverage data plus automation for prior authorization and patient outreach. The tools aim to improve medication affordability, time to therapy, and adherence while reducing phone calls and faxes.

Companies competing with RonanRx Inc. for the same Google search keywords, organic and paid, via search-intersection analysis.

In the news

RonanRX: We use AI to personalize peptides to your biologyycombinator.com · Jul 2026

Frequently asked questions

What does RonanRx Inc. do?
RonanRx offers personalized GLP-1 weight-management care delivered via text, where a licensed physician reviews a patient's history to set an individualized dose, titration schedule, and patient-specific adjunct, and a licensed pharmacist at the patient's selected pharmacy verifies and releases compounded, patient-specific prescriptions. It serves individual patients in the US (availability varies by state) and plans to add hormone therapy (HRT).
Who founded RonanRx Inc.?
RonanRx Inc. was founded by Lloyd Armbrust, Emily Colman in 2026.
Who are RonanRx Inc.'s investors?
RonanRx Inc.'s investors include Y Combinator.
Where is RonanRx Inc. headquartered?
RonanRx Inc. is headquartered in San Francisco, US.