Every WhatsApp AI assistant sits on one of three foundations, and the foundation — not the feature list — decides what it can ever do for you.
Foundation 1: a bot on a separate number
Easy to ship. It cannot read your existing chats, everyone you contact through it sees an unfamiliar number, and you have to remember to talk to it. Fine for a novelty, useless as an executive assistant.
Foundation 2: the WhatsApp Business API
Built for businesses messaging customers: template approvals, session windows, per-message pricing. It has no access to your personal conversations, by design. Excellent for support desks, wrong tool for your own inbox.
Foundation 3: a linked device
The assistant authorises as a device on your own account, exactly like WhatsApp Web. It sees what you see, sends as you, and needs no new number. This is the only foundation on which full-context assistance is possible — and the one that demands the strictest guardrails.
What to check before you trust any of them
- Isolation: is your data in its own environment, or pooled in a shared database?
- Blocking: can you make a chat genuinely unreadable, in every mode?
- Draft-first: does anything sent on your behalf wait for your approval?
- Bulk limits: does it refuse broadcast-shaped sends, including split across turns?
- Training: is your data explicitly excluded from model training?
- Reconnection: when the link drops, are you told immediately?
That last one is more important than it sounds. A silent disconnect is worse than an outage, because you keep assuming the assistant is watching.