Unofficial WhatsApp and scrapers: ban risk, unreliable delivery, no audit. For a concierge, that is ops and account risk.
The durable path: Cloud API, approved Utility templates, explicit opt-in, and the 24h window once conversation opens.
Kyvvio sends templates (pre-check-in, access) and relies on status webhooks. If Meta refuses, the stay goes to manual fallback — not radio silence.
Cost: WhatsApp Business Platform fees are billed by Meta (outside the Kyvvio subscription). Check your Meta Business Manager — Kyvvio adds no markup.