Founder & CEO · Plenful · San Francisco
Co-Founder & CEO at Plenful · Inc. Female Founders 500 · 2026
"To give healthcare teams their time, focus, and sanity back through high-impact AI automation - AI that works with them, not around them."
Annual admin burden Plenful is attacking
Employees and counting
Average customer ROI
Average time to go live
The Story
Five days a week, Joy Liu walked into the four walls of a specialty pharmacy and watched highly trained professionals drown in paper. Faxes. PDFs. Prior authorization forms routed by hand. Spreadsheets cross-referenced with other spreadsheets. In the United States' most sophisticated health systems, skilled pharmacists and technicians were spending the majority of their shifts doing work that, in any other sector, had already been automated out of existence.
Liu wasn't a pharmacist herself. She had arrived at Shields Health Solutions by way of Goldman Sachs' Hedge Fund Group and Barclays - a trajectory that speaks to rigorous pattern recognition more than any romantic calling to healthcare. But something happened inside those specialty pharmacies: she started noticing the gap between what technology could do and what these teams were actually given to work with. And the gap was enormous.
"I was privy to countless conversations with medical staff around burnout," she said later. The administrative load wasn't a nuisance - it was consuming the profession. Pharmacy technicians spending entire shifts on tasks that could, in theory, be configured away. Prior authorizations queued like DMV appointments. 340B compliance audits that touched less than five percent of eligible claims because checking every one would take impossible human hours.
Liu left Shields and co-founded Plenful in 2021, mid-pandemic, with Joy Patel - a fitting partnership: two Joys tackling one of healthcare's most joyless problems. The thesis was precise: don't build another point solution. Build a configurable, no-code automation platform that could handle any workflow, across any data format, across any system - because that was the actual chaos these teams lived in every day. Faxes to actions. PDFs to processes. EHR extracts to automated decisions.
Plenful emerged from stealth in October 2023 with $9 million in seed funding led by Bessemer Venture Partners, and 20+ customers already using the platform. That speed of customer adoption told the story better than any pitch deck could: the problem had been real, and the market had been waiting.
By May 2024, Series A closed at $17 million. By April 2025, Mitchell Rales - co-founder of Danaher Corporation, one of the great industrial conglomerates in American business history - led a $50 million Series B alongside Arena Holdings. Rales doesn't join boards of incremental companies. When asked about Liu, he described her as possessing "remarkable learning agility and deep healthcare expertise." The board seat was his vote of confidence, cast in dollars.
Today, Plenful serves over 60 U.S. healthcare organizations including MUSC, Cencora, Renown Health, Shields Healthcare Group, and Samaritan Health. The platform has expanded its customers' 340B audit coverage from less than five percent to one hundred percent. Prior authorization is processed four times faster. Certain operations have seen 96% time reductions. The company has opened a second headquarters in New York City and grown to over 110 employees - all while maintaining the 4x year-over-year growth rate that made institutional investors compete to participate in the Series B.
In 2026, Inc. named Joy Liu to its Female Founders 500 list. It's a recognition of what she built, yes - but more precisely, it's a recognition of what she knew before anyone else: that the most expensive inefficiency in American healthcare wasn't a clinical one. It was sitting in a fax machine queue.
Career Arc
The path that made Joy Liu the right person to build Plenful isn't obvious until you stand at the end of it and look back. A Northwestern economics degree. Two years analyzing hedge funds at Goldman Sachs. Time as a derivatives trader at Barclays. These are credentials that belong to a particular archetype - one that typically goes on to run a fintech or join a VC firm.
Instead, Liu moved into healthcare operations. Specifically, she moved into specialty pharmacy - arguably the most administratively complex corner of American healthcare. At Shields Health Solutions, she sat inside health systems, not adjacent to them. She watched the work happen. She learned what could break, what already was breaking, and what technology was conspicuously absent.
That on-the-ground time is what separates Plenful from enterprise software built by engineers who've never seen the inside of a specialty pharmacy. Liu didn't theorize the problem. She lived it for years before she built the solution. The platform's specificity - its ability to handle 340B compliance, infusion workflows, prior authorization queues, and referral management - reflects knowledge that can't be acquired from a market research report.
A personal experience as a patient advocate for a family member added another dimension. Liu saw healthcare's administrative friction not just from the operator side, but from the patient's perspective - the delays, the dropped handoffs, the information siloed in systems that refused to talk to each other. That dual vantage point sharpened the mission.
Timeline
2011 - 2015
Studies Economics at Northwestern University
2015 - 2017
Analyst, Hedge Fund Group at Goldman Sachs
2017
Trader at Barclays Investment Bank
2017 - 2018
Manager then Director of Strategic Operations, Shields Health Solutions
2019 - 2021
VP of Marketplace and Growth at Zeus Living
2021
Co-founds Plenful with Joy Patel during the pandemic
Oct 2023
Plenful emerges from stealth with $9M seed and 20+ customers
May 2024
Leads $17M Series A to expand pharmacy automation
Apr 2025
Closes $50M Series B; Mitchell Rales joins board; NYC office opens
2026
Named to Inc. Female Founders 500; launches MFP Intelligence product
In Her Words
I was spending five days a week within the four walls of health systems' specialty pharmacies, working alongside pharmacists, pharmacy technicians and clinicians, and it was eye-opening to me how much manual administrative work was burdening not just myself but also our team members.
Growth is important. But growing with confidence, efficiency, and intentionality is what enables us to build an enduring company that lasts.
To give healthcare teams their time, focus, and sanity back through high-impact AI automation - AI that works with them, not around them.
Mitch has already been such an important part of Plenful's story. Over the past year, his insights, questions, and belief in our mission have pushed us to think bigger and execute smarter.
You are the heartbeat of this company. I am endlessly inspired by your grit, empathy, and brilliance.
Plenful's platform ingests and connects data from various sources and formats, such as faxes, PDFs and electronic health records. Then Plenful's highly configurable and AI-powered platform can apply organization-specific rules, flags and automations to this processed data.
By the Numbers
* Approximate figures based on customer-reported outcomes
Seed Round · Oct 2023
$9M
Series A · May 2024
$17M
Series B · Apr 2025
$50M
Total Raised
$76M
Milestones
Inc. Female Founders 500 (2026) - Named alongside the most impactful women building companies in America.
$76M raised - Seed, Series A, and Series B closed in under two years of public operation.
4x year-over-year growth - Sustained across multiple consecutive years, not a single-quarter spike.
60+ healthcare customers - Including MUSC, Cencora, Renown Health, Shields Healthcare Group, and Samaritan Health.
340B audit coverage: 5% to 100% - Customers went from auditing a fraction of eligible claims to covering every single one.
Mitchell Rales joins the board - Co-founder of Danaher Corporation took a board seat alongside the Series B, a rare vote of confidence from a builder of industrial giants.
Field Notes
The Name Thing
Plenful has two co-founders. Both are named Joy. Joy Liu and Joy Patel built the company together - which means every internal conversation involving "Joy" requires clarification. They seem fine with this.
The Unlikely Path
Goldman Sachs to Barclays to specialty pharmacy - the move that no career counselor would have recommended is precisely the move that made Liu the most credible person in the room when pitching hospital systems.
Pandemic Origin
Plenful launched in 2021, when healthcare was under maximum strain. Liu chose the moment when the problem was most visible to start solving it - not after the crisis had passed.
The Fax Machine Problem
Plenful's core technical achievement is turning unstructured faxes and PDFs into automated workflows. In 2025. This is not a joke. It is also a multi-hundred-million dollar opportunity.
NYSE Moment
Joy Liu joined the New York Stock Exchange in 2025 for an NYSE TV segment - a full-circle moment for a former Goldman Sachs and Barclays market participant.
Time to Impact
Plenful customers go live in an average of four weeks. In enterprise healthcare software, that is not just fast - it is almost unbelievably fast. It's also a deliberate product decision.
Network
Joy Patel
Co-Founder, Plenful
Liu's partner in building Plenful from the ground up. Together, the two Joys architected the platform, the team, and the vision for healthcare workflow automation.
Mitchell Rales
Board Member, Lead Series B Investor
Co-founder of Danaher Corporation. His decision to lead Plenful's Series B and join the board as an active member marked a significant institutional validation of Liu's mission.
Bessemer Venture Partners
Seed & Series A Investor
Led Plenful's initial $9M seed round and continued participating through the Series A, signaling early and sustained conviction in Liu's approach.
Arena Holdings
Series B Co-Lead
Co-led the $50M Series B alongside Mitchell Rales, reinforcing the institutional quality of Plenful's investor base.
Notable Capital
Series A Lead / Series B Participant
Led Plenful's Series A and continued into the Series B. Their investment thesis on Plenful is publicly documented in a detailed rationale on the Notable Capital blog.
Shields Health Solutions
Former Employer
Now Walgreens-owned, Shields is where Liu discovered the specialty pharmacy workflow problem firsthand - making it, inadvertently, the origin story of her company.
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