Connected carefully
Provider-neutral where it matters.
Infrastructure integrations stay behind Frontal Voice contracts so customer workflows do not depend on one vendor's data model.
Voice provider
Retell is the first configured voice adapter. A deterministic mock runs locally; future providers can implement the same contract.
Calendars
Google Calendar and Cal.com adapters sit beside a deterministic mock calendar.
Notifications
Email and SMS channels use replaceable provider abstractions and never claim delivery before confirmation.
Outbound webhooks
Growth and Professional organizations can deliver normalized lead and appointment events to customer systems.
Billing
Stripe Checkout, portal, subscriptions, and metered usage are isolated behind a high-integrity billing subsystem.
Coming later
CRM and service-platform adapters will be added only when they are genuinely implemented and tested.