A HIPAA AI voice agent is a chain of five contracted layers — platform, LLM, speech-to-text, text-to-speech and telephony — but the number of business associate agreements you personally sign is not five. It is however many of those layers you contract directly. Across thirteen vendors read on their own pages on 18 September 2026, that count ranged from one to five.
What this covers
- What HIPAA actually requires you to sign, and from whom
- The five layers, and who is holding PHI at each one
- The BAA matrix: what each vendor publishes on its own page
- The two cells that nearly stayed blank, and the route that filled them
- What "zero retention" actually means, per provider
This is a technical summary. The full guide — with the tables and worked examples — is on our site: *HIPAA BAA Chain for AI Voice Agents: Who Signs*.
Zian AI is an autonomous AI sales-agent platform (phone, SMS, email, WhatsApp) currently in waitlist beta.
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