Campaigns, rebuilt: scale outbound calling with Vapi

Vapi has launched a rebuilt version of Campaigns for batch outbound calling, enabling users to call contact lists of up to 10,000 people with personalized assistants or squads and configurable phone numbers, calling windows, and conversion checks. The new system replaces an earlier batch-based design with a durable workflow engine that preserves campaign state through restarts or failures, manages concurrency through a sliding window of active calls, and records immutable events for each campaign and contact to provide accurate progress tracking and audit trails. Contact data can be inserted as prompt variables, while pre-dial webhooks can consult external systems to skip contacts who have already converted or avoid calls when webhook errors occur. Campaigns also provide live status visibility and allow users to stop new dials while active calls finish. Vapi positions the upgrade for operational use cases including healthcare appointment reminders, payment collections, sales lead qualification, and staffing outreach, with integrations supporting real-time CRM or system updates.

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