Gary R.
Prosper Health generated messages written as my therapist, in her voice, after she had left the practice. I logged in and read them.
I am autistic. I was seeing a therapist through Prosper Health. She left the practice. After she was gone, I kept receiving notifications that read: "Karla Magnan sent you a message. Hi Gary Rosenbaum, Karla Magnan just sent you a secure message. You must login to the Prosper Health Client Portal and go to the Chat tab to view the message and reply. — The Prosper Health team" So I logged in. And there was a message waiting in the chat, from her, written in the first person: hello, this is Karla, book an appointment with me. That is not a notification bug. That is a message body, in my clinician's voice, using her name, asking me to schedule with her, sitting in a secure portal whose entire purpose is that what you read there is from your provider. She was no longer at the practice. She could not see me. She was not writing to me. This happened day after day. Each time I logged in, read it, and booked an appointment. Each time the appointment could not happen. And the next day the portal produced another message in her name telling me to make an appointment. I am autistic. I take written language at face value, and nothing about a secure clinical portal told me not to. That is the one place a patient is entitled to assume that a message signed by their therapist came from their therapist. Prosper has now admitted it in writing. Their message to me states that the notifications were tied to a messaging setting on my profile rather than indicating that my provider had returned, that they have turned notifications off for my account, and that their team has been made aware of the distress these messages cause after a provider's departure. These messages. Plural. Ongoing. Prosper knows their platform does this when a clinician leaves, they know it distresses patients, and it was still running on my account until I made them stop it. Understand who did this. Prosper Health is a venture-backed startup founded in 2023 that has raised $26.25 million, including $10 million closed on August 28, 2026, weeks before this happened to me. Its leadership includes a Chief Clinical Officer on faculty at Northwestern and Yale, and it is publicly associated with Ari Ne'eman, co-founder of the Autistic Self Advocacy Network. This company markets itself to autistic adults on exactly that credibility. It is not a small outfit that did not know better. Understand the structure. Clinicians at Prosper are paid per session and build their own caseloads. The company supplies the clients. Prosper holds the account, the chat history, the scheduling, and the name on every message. PitchBook lists 45 total employees while the company reports thousands of clients across eight-plus states and dozens of open clinical postings. The clinician is the part that moves. Everything else stays with the platform, which is precisely why the platform was able to keep writing in her name after she was gone. In this model your therapist's name is not a person. It is a field in a database. Continuity is the treatment in mental health care. A structure built so the clinician can be swapped out cannot deliver continuity, and this one substituted a generated message instead. They have since closed my account and removed my payment information at my request. If you are autistic, or you are choosing care for someone who is: on this platform your therapist can disappear without notice, and the software will keep writing to you as her. Gary L. Rosenbaum Jr. Port Charlotte, Florida
Response from Prosper HealthSep 28, 2026
Thank you for taking the time to share this. We’re truly sorry for the confusion and distress these messages caused, and we can understand why receiving messages that appeared to come directly from your former therapist would have been upsetting and understandably confusing. The messages were generated through an account notification setting and did not mean that your former therapist had returned to the practice or was available for appointments. We recognize that this was not clear from the messages themselves, and we’re sorry for the impact that had on your experience. We take feedback like this seriously and have shared your concerns with our team. We appreciate you bringing this to our attention and are sorry that this experience left you feeling frustrated and unsettled.



