Health IT · Clinical documentation
Hippo Scribe
An ambient AI scribe built for physical, occupational and speech language therapists, not doctors. It records the session, drafts the note in the clinician's own format, and pushes it into whatever EMR the practice already runs.
A therapist named Marissa
In its Y Combinator company profile, Hippo Scribe introduces its customer with a composite sketch. Meet Marissa, a pediatric speech language pathologist who sees eight children a day and spends her energy keeping each one engaged. Meet John too, a physical therapist who treats 8 to 13 patients a day, helping adults recover from pain and older patients avoid falls. Both go home and spend one to two hours writing down what just happened in each session, because there was no time to write anything down while it was happening.
That gap between the session and the note is what Hippo Scribe is built to close. The product records the visit, or a clinician's dictation afterward, and generates a first draft of the clinical note within seconds of the recording ending. A Chrome extension places that draft next to whatever web based EMR the practice uses, so the clinician can review it and copy it in rather than typing from scratch.
The problem it names
Hippo Scribe's own framing of the problem is specific: burdensome documentation is, in its words, the number two reason causing burnout for physical therapists, and more than half of physical therapists write documentation in their free time without pay, up to two hours a day. The company has not published the study behind that figure, so it should be read as the company's own framing of the problem, not an independently verified statistic.
The company's blog describes the same problem from the pediatric side. One customer told Hippo Scribe, “Doing point of care documentation is almost impossible with our line of work.” Another described the emotional cost of the job itself: “We have a lot of autistic clients and young ones... I love it, but it definitely, like, you have to give a lot of your, like, self. I guess you need a little extra time to just chill and recharge again.”
The founder
Hippo Scribe's public founder is Yansen Zhou. In his Y Combinator launch post he introduced himself this way: “Hello world, I’m Yansen, son of clinicians and I’m building AI solutions to make documentation easier.” Beyond that line, neither the YC page nor the company's own materials describe his clinician relatives in more detail.
Zhou's own website lists a software career before Hippo Scribe: he says he built products at Snapchat, on the Discover feed, and at Airbnb, on payments processing. A 2020 SEC filing, Airbnb's Form S-8 registering shares for current and former employees, lists a Zhou Yansen among the several thousand people covered by that plan, which is consistent with Zhou's own account of working there. Hippo Scribe's mobile app and Chrome extension are both published under the name Icarus Lab Inc., a Delaware entity with a registered address in Dover, according to both the Apple App Store and the Chrome Web Store listings.
Where things stand
Hippo Scribe launched twice on Y Combinator's platform: once around its Winter 2023 batch, and again with a later post titled “Free AI scribe for PT/OT/SLP,” which introduced a free plan and pointed to a Facebook group where, the company said, “600+ clinicians are discussing AI Scribe.” The Chrome extension has continued to receive updates, with a build dated May 17, 2026 on the Chrome Web Store, and the company added a companion iPad and iPhone app, Hippo Scribe Go, copyrighted 2024 to Icarus Lab Inc.
Zhou's own site, which is dated to 2026, describes Hippo Scribe in the past tense: “Previously, I founded Hippo Scribe, a profitable AI scribe startup.” The same page says he is “currently a Member of Technical Staff at OpenAI.” That leaves an open question the public record does not answer: whether Zhou still runs Hippo Scribe day to day, or has handed it off while the product itself keeps shipping updates.
What is proven, and what is still claimed
| Evidence | What the record shows | Source type |
|---|---|---|
| Company identity | Hippo Scribe's Chrome extension and iOS app are both published by Icarus Lab Inc., a Delaware company with a registered address in Dover. The Apple listing shows copyright 2024. | Public record |
| Y Combinator batch | YC's company page lists Hippo Scribe as founded in 2023, Winter 2023 batch, team size 2, status active, primary partner Jared Friedman. | Public record |
| Founder's Airbnb employment | A Zhou Yansen appears among current or former employees in Airbnb's 2020 Form S-8, a public SEC filing registering shares for that plan. It does not by itself confirm this is the same Yansen Zhou, but it is consistent with his own stated work history. | Public record |
| Named customers | Four practice owners are named and quoted on Hippo Scribe's own site: Charles J. Lockwood of Mobile Physio LLC, Mike Chua of GeriHab Physical Therapy and Wellness in Jackson, TN, Emma Phibbs of Move Well PT, and Lisa Thompson-Goertz of Habit Project. All are company-selected testimonials, not independently sourced quotes. | Company-stated |
| Scale claims | The company says “hundreds of clinicians” use the product and that its Facebook group has “600+ clinicians.” No user count, revenue figure or customer list has been published outside the company's own channels. | Company-stated |
| Profitability claim | Founder Yansen Zhou's personal site describes Hippo Scribe as “a profitable AI scribe startup.” No financial statement or revenue figure backs the claim. | Company-stated |
| Funding record | No SEC Form D was found under Hippo Scribe, HippoScribe or Icarus Lab Inc. in EDGAR full text search, and no institutional round has been reported by outside press. | Not found |
| EMR integrations | The company describes a Chrome extension that works with any web based EMR, and its blog names Fusion Web Clinic as one example. No formal marketplace listing or partnership with WebPT or another major PT EMR vendor was found. | Company-stated |
Read plainly: Hippo Scribe is a real, actively maintained product built and run under a named Delaware company, with a founder whose earlier career at Airbnb and Snapchat checks out against an independent SEC filing. What has not been independently verified is scale. Clinician counts, the burnout statistics the company opens with, and the claim of profitability all come from the company or its founder, with no outside audit or press report behind them.
What to watch
- Whether Yansen Zhou, now describing himself as a Member of Technical Staff at OpenAI, remains actively involved in running Hippo Scribe, or whether new leadership emerges publicly.
- Any named EMR partnership or marketplace listing, such as with WebPT, that would move the company's integration claims from company-stated to independently checkable.
- Whether the company ever files a Form D or announces an institutional round, which would be the first public financing record for the business.
- Independent reviews or case studies from pediatric OT/SLP or PT practices beyond the testimonials the company has chosen to publish.
In their words
“Hello world, I’m Yansen, son of clinicians and I’m building AI solutions to make documentation easier.”
Yansen Zhou, founder, Y Combinator launch post · Company release
“Doing point of care documentation is almost impossible with our line of work.”
Hippo Scribe customer, quoted on the company blog · Company-stated
“We have a lot of autistic clients and young ones... I love it, but it definitely, like, you have to give a lot of your, like, self. I guess you need a little extra time to just chill and recharge again.”
Hippo Scribe customer, quoted on the company blog · Company-stated
“HippoScribe is a game-changer for physical therapists, especially for mobile and home health. Majorly cuts down on time and brain strain. I'm excited to see where it goes, as Yansen and his team are constantly asking for feedback and optimizing the program, and Yansen is super-responsive and helpful!”
Dr. Charles J. Lockwood, PT, DPT, CBIS, owner of Mobile Physio LLC · Company-stated
“It has really been a game changer for me. We even had to let go one of our human scribe. The app has really made My documentation time quicker and more efficient.”
Mike Chua, PT, DPT, founder of GeriHab Physical Therapy and Wellness · Company-stated
“I think the AI technology is very new, so everyone’s new to this. As a company, we’re also just learning what is the best way to build and how to solve your problem better.”
Yansen Zhou, Strata Studios podcast interview, 2024 · Interview
“I'm a San Francisco-based software engineer with a product focus. I'm currently a Member of Technical Staff at OpenAI.”
Yansen Zhou, personal website · Founder site
“Previously, I founded Hippo Scribe, a profitable AI scribe startup.”
Yansen Zhou, personal website · Founder site
Related companies
Sources
- Public recordAirbnb, Inc. Form S-8, resale prospectus listing current and former employees
- Public recordEDGAR full text search for Hippo Scribe, HippoScribe and Icarus Lab
- Public recordHippo Scribe listing, developer Icarus Lab Inc.
- Public recordHippo Scribe Go app listing, seller Icarus Lab Inc.
- IndependentAI for Physio Documentation and More! It's So Easy, interview with Yansen Zhou
- IndependentYansen Zhou, Founder at HippoScribe, AIMinds #021
- Founder siteYansen Zhou personal website, Work page
- CompanyHippo Scribe: AI assisted documentation for PT/OT/SLP
- CompanyLaunch YC: Hippo Scribe, 70% faster documentation for PT/OT/SLP
- CompanyLaunch YC: Hippo Scribe, Free AI scribe for PT/OT/SLP
- CompanyFree yourself from documentation with Hippo Scribe, homepage and testimonials
- CompanyHippo Scribe: The AI Solution for Pediatric OT/SLPs Struggling with Documentation
Profile researched and written by Healthcare Discovery. Last updated September 29, 2026.
