Vapi

Vapi is a developer platform for voice AI agents with a free tier (60+ minutes included). It provides sub-500ms latency, 99.9% uptime, and supports over 1 billion calls. Core capabilities include orchestration, real-time monitoring, enterprise configurability, AI guardrails, and API-first integrations. The platform is SOC 2, HIPAA, and PCI compliant, with SSO, OAuth, and RBAC. Pricing starts with a free tier; the Build plan is usage-based at $0.05/min plus model costs, with optional add-ons like HIPAA ($2K/mo) and Zero Data Retention ($1K/mo). Enterprise Scale plan has volume pricing. Vapi suits developers and enterprises needing voice AI for customer support, lead qualification, appointment scheduling, outbound selling, and inbound support, with use cases in healthcare, automotive, and marketplace staffing.