Ada vs K Health: the AI symptom checker vs the app that became enterprise AI
Last updated September 3, 2026.
Ada and K Health both made their names in AI symptom checking, but only one of them is still something you can download and use directly. Ada continues to offer its free consumer symptom assessment. K Health pivoted to enterprise: its clinical AI now powers health systems rather than a consumer app.
What is K Health now?
K Health describes itself as "AI-Enabled Care, Built for Leading Health Systems," per its own site, partnering with Mass General Brigham, Mayo Clinic, Cedars-Sinai, Northwell, and others. Its PatientGPT and dynamic intake now live inside hospital systems as a digital front door, integrated with their records. The old consumer app with $29-style visits is not the business anymore; if you encounter K Health today, it is probably inside your own health system's app without the logo on it.
What does Ada offer consumers?
Ada's core product remains consumer-facing: a free, AI-powered symptom assessment optimized by clinicians, which interviews you with follow-up questions and ranks possibilities based on your answers, plus a doctor-written medical library, per its own site. It is the more thorough checker experience: structured, adaptive, and transparent that its output is possibilities, not diagnosis.
Which one should you use?
For a direct symptom assessment you can use right now, Ada is the answer by default, since K Health no longer offers one. For a fuller clinical-style conversation that ends in a care note for a real doctor, Pymander's free AI doctor consult picks up where checkers stop. Emergencies bypass all of it: call 911. Pymander routes emergency red flags to 911, and its escalation logic is documented in its safety architecture working paper.
What a Pymander AI doctor consult looks like
Illustrative example, not a real member's messages.
Common questions
Can I still use K Health as a consumer?
Not as a standalone app. K Health now describes itself as "AI-Enabled Care, Built for Leading Health Systems," providing intake and clinical AI to systems like Mass General Brigham and Mayo Clinic. You encounter it through your health system, if at all.
Is Ada still available and free?
Yes. Ada offers its free AI-powered symptom assessment, optimized by clinicians, plus a doctor-written medical library, per its own site.
What replaced K Health for cheap doctor visits?
Flat-price telehealth like Sesame, with visits from $34, or insurance-based options through platforms like Teladoc or your own health system, which may now run K Health's technology under the hood.
Which symptom checker is most accurate?
No checker publishes a decisive accuracy edge, and a 2015 BMJ study of symptom checkers found the correct diagnosis listed first only about a third of the time. Use them for orientation, then confirm with a clinician.
Is my symptom data private with these apps?
Consumer apps are not your doctor's office; read their privacy terms before sharing. Purpose-built medical tools generally disclose their data handling, and hospital-run AI intake inherits the hospital's protections.
What if it is an emergency?
Skip the checker and call 911. Pymander is built to recognize emergency red flags in your text and direct you to call rather than continue.