Cenote bets AI agents fix fax-era clinic referrals — 50% weekly ARR growth, YC W25

Cenote sells AI back-office automation to specialist medical clinics: agents ingest referral faxes, extract and validate patient data, check insurance eligibility and integrate with clinic EHRs, compressing referral-to-treatment from weeks to hours.

That clinics will pay AI agents to run their fax-era referral pipeline — parse, verify, schedule — because every lost referral is delayed care and revenue.

$500K standard YC W25 investment (early 2025).

Kristy Gao (University of Waterloo BCS '22, ex-Watershed Climate) moved to San Francisco for her first job and got into an accident; as a Canadian on a work visa she spent months disputing four insurance claims, and the follow-up surgery she was told would happen within a month took six. She quit her job — moving home to Canada for months while her visa situation resolved — and founded Cenote in 2024 with Kofi Ansong and Ajani Smith-Washington, friends from the book club she had started to build community in the city. Their target: specialist clinics where referrals, insurance requests and follow-ups still arrive by fax.

Cenote was accepted into Y Combinator's Winter 2025 batch and presented at Demo Day on 2025-03-12. The Launch HN post on 2025-03-06 drew 61 points; commenters pressed the team on EHR competition and liability, and the founders answered that their system flags low-confidence OCR and LLM output for human review, and that physicians always make the final call. The $500K went into a sales-forward push — conferences like Medtrade, in-person onboarding and custom EHR integrations built with AI browser automation. By May 2025 TechTimes reported 50% week-over-week ARR growth, with sleep clinics, durable-medical-equipment providers and neurology practices processing thousands of patients monthly; specialty pharmacies and wound-care clinics were next on the roadmap.

Gao's six-month wait for her own surgery made the pain concrete: referral and insurance admin, not medicine, was delaying care.

Specialist clinics feel every lost faxed referral in both patient outcomes and revenue, so the ROI case is visible without a sales deck.

Custom EHR integrations built with AI browser automation removed the months-long technical barrier that normally blocks small teams.

Human-in-the-loop design answered the liability question — physicians review, agents accelerate — which is what clinics needed to hear.

Attack the workflow where failure is visible: clinics that watch faxed referrals vanish feel the loss immediately, so an agent that recovers some sells itself.

As of 2026-09-05 Cenote is live and repositioned. Its website now sells HIPAA-compliant call, SMS and WhatsApp AI sales agents for telehealth and D2C health brands — abandoned-cart, checkout and win-back recovery — rather than clinic referral back-office automation. A YC Launch page dated 2026-04-23 says one clinic's agent converted at 2x the rate of a human rep, and the current site reports tripling a client's abandoned-checkout recovery and a roughly 15% lift in company-wide conversions; those figures are Cenote-reported.