Zibu AI Targets Healthcare's $150B Problem and Widespread Provider Burnout

SAN JOSE, CA – May 04, 2026 – The U.S. healthcare system is hemorrhaging money from a surprisingly low-tech problem: missed phone calls. With missed appointments costing an estimated $150 billion annually, a new voice AI company, Zibu, has unveiled a next-generation agent it claims can solve one of healthcare's most persistent operational challenges. The company is targeting the critical gap of after-hours patient communication, a major contributor to both lost revenue and soaring rates of physician burnout.

Founded by second-time entrepreneur and former Moveworks product designer Avi Singh, Zibu is positioning itself to disrupt an $11.5 billion market by ensuring no patient call goes unanswered. With roughly 80% of medical appointments still scheduled over the phone, every ring that isn't picked up after clinic hours represents a risk of a lost appointment, a delay in care, and a strain on an already overburdened system.

"Healthcare doesn't stop after 5 PM but most systems do," said Avi Singh, Founder & CEO of Zibu, in the company's announcement. "We're building a layer of intelligence that ensures every patient is heard, and every provider is prepared."

The High Cost of Unanswered Calls

The financial and operational impact of patient no-shows is staggering. For individual practices, a single missed appointment can represent over $200 in lost revenue. Multiplied across a clinic's schedule, where no-show rates can range from 5% to as high as 30%, the financial drain becomes substantial. This lost revenue directly impacts a practice's ability to invest in new equipment, retain staff, and expand services.

Zibu's core proposition is an AI-powered voice agent designed to function as a tireless digital receptionist, particularly after the front desk staff has gone home. The system is designed not just to take a message, but to engage the patient, capture clinically relevant information about their needs—whether it's scheduling, a prescription refill, or a pressing health concern—and then relay that information to the on-call provider through structured, easy-to-digest summaries delivered via text or voice message. This ensures that when a provider does return a call, they are already informed and prepared for an efficient, effective consultation.

AI as a Salve for an Exhausted Workforce

Beyond the financial implications, Zibu is addressing a deep-seated human crisis within healthcare: provider burnout. According to a CDC report, 46% of health workers reported feeling burnt out in 2022, a significant jump from 32% in 2018. Primary care physicians are among the hardest hit, with some studies showing burnout rates approaching 58%. The administrative burden of chasing down patient information, returning calls with little context, and charting after hours are major contributors to this exhaustion.

Zibu's platform aims to alleviate this by automating the initial information-gathering process. Instead of a provider beginning a late-night callback with a blank slate, they receive a concise summary of the patient's issue. This allows them to be more productive and complete tasks faster, directly aligning with CDC recommendations for addressing burnout. The ability to handle routine requests like appointment scheduling and prescription refills automatically further frees up valuable time for both clinical staff and providers, allowing them to focus on more complex patient care.

Navigating a Crowded Field of AI Assistants

Zibu enters a dynamic and increasingly competitive healthcare AI market. The company is not alone in its quest to streamline clinical communications. Established giants like Nuance, now part of Microsoft, have long dominated the space with AI-powered clinical documentation tools like Dragon Medical One. Meanwhile, other agile startups such as Hyro, Memora Health, and TeleVox offer their own conversational AI platforms to automate patient interactions across websites, call centers, and SMS.

However, Zibu aims to carve out its niche by focusing intently on the after-hours problem and by building in specific safeguards for the highly regulated healthcare environment. The company emphasizes that its platform is not a generic chatbot adapted for healthcare, but a purpose-built system. A key differentiator highlighted by the company is its use of proprietary "AI guardrails." This technology is designed to prevent the AI from "hallucinating" or, critically, dispensing any form of medical advice. During the company's research, it found that providers were deeply concerned about the liability of an AI overstepping its bounds. Zibu's system is built to ensure the AI acts as a sophisticated information gatherer, leaving all clinical judgment and advice in the hands of the human provider.

A System Built for Clinical Realities

Adherence to security and workflow integration is paramount in healthcare technology. Zibu asserts its platform is fully HIPAA compliant, utilizing a secure infrastructure to protect sensitive patient data. The system is designed to integrate into a provider's existing mobile-centric workflow. Recognizing that doctors and nurses are rarely tied to a desk, Zibu offers a mobile-first philosophy with iOS and Android apps.

Through the app, providers can review the AI-generated summaries and respond directly to the patient via a simple phone call or a secure video call, all without having to switch between multiple tools or reveal their personal phone number. The platform's capabilities extend to fully automated scheduling, where patients can book or reschedule appointments, with the changes reflected directly in the office's Electronic Health Record (EHR) system calendar. This seamless integration promises to reduce manual data entry and minimize scheduling errors.

While the company is new, its platform is already being used by initial healthcare customers. Early feedback reportedly indicates strong demand among private practices looking to improve patient responsiveness without adding to their operational overhead. Looking ahead, Zibu plans to expand its capabilities into proactive patient outreach and deeper care coordination integrations.

"This is not just about answering calls," Singh added. "It's about redefining how healthcare providers and patients stay connected."