Building a Multi-Touch Outreach Automation Pipeline with Supabase Edge Functions and VAPI Voice Agents

OPENING:
We built a complete B2B outreach automation system for Load Bearing Empire that combines async email sequencing, PDF capability statements, and synchronous voice calls—all orchestrated through Supabase Edge Functions and pg_cron scheduling. This article walks through the technical architecture: our Supabase schema design for prospect management, 6 serverless functions handling 4-touch email sequences via transactional mail, Edge Function scheduling with pg_cron, and VAPI voice agent integration for qualification calls. We'll cover what we learned across 8 production iterations (V1-V8), including retry logic, state management for multi-channel touchpoints, and cost optimization on the Supabase free tier before scaling to pro. If you're building sales infrastructure with modern serverless tools instead of Zapier, this breakdown is for you.