The channel people actually reply on.
ZarvioAI sends WhatsApp follow-up on the official Business API — opt-in enforced, approved templates outside the 24-hour window, STOP honored instantly, and every message logged. No unofficial libraries, no ban risk.
For a lot of markets a WhatsApp message gets read in minutes while an email waits days. That advantage evaporates the moment your number gets banned — which is what unofficial automation libraries eventually do to it.
What WhatsApp Follow-Up actually does
- Official Business API, deliberately — We evaluated the unofficial browser-automation route and rejected it. It's cheaper right up until the number carrying your client relationships is banned with no appeal, and it puts their brand at risk, not just ours.
- Instant first touch — A new lead can get a WhatsApp acknowledgment within seconds of the form submission — before research finishes and long before anyone dials. Being first is most of the advantage.
- The 24-hour window, handled — Inside the customer-service window, messages are freeform. Outside it, only approved templates go out. The rules are enforced in the send path, so a rule you didn't know about can't get your account flagged.
- Opt-in and STOP enforced — No opt-in, no automated send — full stop. STOP writes to the same suppression list email and SMS use, so opting out here opts out everywhere.
Questions people ask about WhatsApp Follow-Up
Do I need my own WhatsApp Business number?
Yes — a WhatsApp-enabled sender through Twilio, plus approved message templates for sends outside the 24-hour window. Until those are provisioned, WhatsApp steps fall back to a task for the rep rather than failing silently.
Why not use an unofficial WhatsApp library? They're free.
Because the failure mode is losing the number permanently, and for an agency that number is the client's. The official API costs per conversation and doesn't get banned for existing.
Can I send a WhatsApp message to any lead?
Only ones who have opted in. That's both the platform's rule and the reason the channel still has high open rates.
What happens if someone replies?
The reply opens the 24-hour session window, pauses any running sequence for that lead, and surfaces in your inbox — the same reply-stops-everything behavior as email.
More of the platform: AI Sequences → · Live Call Copilot →