How a Sales Team Lifted Cold-Call Conversion 34%

The client is a professional services company that sells into the real estate industry, with aggressive revenue goals and hiring plans. New sellers learned by running practice calls with a manager playing the prospect, so the number of practice calls any rep could get was capped by manager time. That made seller training the constraint on growth. Ramp was slow, and win rates depended on how much one-on-one coaching each rep happened to get.

Atherial built an AI sales roleplay trainer. Sellers pitch voice AI prospects, built on ElevenLabs and trained to behave like the client's real buyers, then get personalized coaching from a custom AI sales coach that analyzes the client's winning call transcripts by deal stage and customer profile. Managers get a dashboard showing which sellers are ready for live leads and where each one needs more practice, so practice volume grows without taking more of their time.

Atherial started from the client's winning call transcripts, using them to model how real buyers talk at each deal stage and for each customer profile. Those patterns shaped the ElevenLabs voice prospects sellers practice against, so a rep can rehearse a realistic first call or objection on demand without waiting for a manager. After each practice call, a custom coach built on Gemini Flash and Groq scores the conversation against what wins deals for this client and gives the seller specific feedback. Seller reports and a manager dashboard, served through a Next.js app, show who is ready for live leads. The build took under four weeks, and most of the effort went into context engineering: making the prospects feel like the buyers sellers actually meet, and tuning the coaching to this client's winning patterns.

Sales-led companies with aggressive hiring plans, especially those selling into a specific industry like real estate, that already rely on call roleplay to train sellers but can't scale one-on-one sessions with managers. It works best when the company has a library of recorded winning calls to model buyers and coaching on.