Bulk Retell Cold Caller

A system that works while you are not looking

This is an outbound SDR that works from a spreadsheet. You add leads with name, phone and context to Google Sheets. On schedule, the system calls each lead with a Retell AI voice agent, listens to whether the call was answered, and follows the right path. If answered, it continues the conversation and logs the result. If not answered, it marks for retry and can send a follow up email. Every call outcome, duration and next step is written back to Sheets so the team sees a complete log without manual updates.

A Schedule trigger reads rows from Sheets in batches. For each lead, the Retell create phone call endpoint is called with the phone number and a prompt that includes the lead context. The response status is checked with If nodes. A success branch calls an LLM to summarize the call and writes to a Call successful sheet. A no answer branch writes to a Did not answer sheet and optionally triggers a Gmail follow up. A Webhook also listens for async Retell callbacks to store final transcripts and update status. The loop continues until the batch is finished.