How they compare
How you talk to it: Dr.Khan AI runs as a web chat and an iPhone app, with real-time streaming replies. Pymander is plain SMS or iMessage to +1 (623) 205-7614, so it works on any phone with zero setup and nothing to install.
Privacy: Dr.Khan AI collects nothing - no signup, no tracking, no stored data, ephemeral sessions. Pymander is not anonymous: it asks for your name, date of birth, and sex, because it keeps a clinical record on purpose. That record is what lets it remember you.
Memory: Dr.Khan AI sessions are ephemeral by design, so every visit starts from zero. Pymander carries your history forward, so each consult starts where the last one ended.
Price: both are free to consult. Neither bills insurance.
Extras: Dr.Khan AI can analyze uploaded lab reports and generate wellness plans. Pymander ends every consult with a written care note you can share with your own doctor through a signed link, and runs a red-flag check on every consult with direct escalation when something needs emergency or same-day care.
Published evidence: Dr.Khan AI states that its medical reasoning scores comparably to GPT-4 on MedQA. Pymander publishes its full evaluation: 98.2% on the USMLE across two independent, fully logged runs, and a HealthBench Hard mean of 0.3331 (N=999) on a sealed, pre-registered run, top five against every published result (the evals page).
Best fit: Dr.Khan AI if you want a one-off, fully anonymous answer with nothing stored anywhere. Pymander if you want the same free consult but with a record that persists, memory across visits, and a care note your own doctor can read.
Neither service replaces your own physician, and both say so themselves. For emergencies, call 911.
