Team - Big Sister AI

The Referee Loop

Why the score
holds up.

The model does not grade on a vibe. It scores against a defined standard, and people who have sold for two decades keep that standard honest.

01 · Standard

A methodology, not a guess

The skill standard comes from 17 years at White Sales - a documented methodology, not a prompt someone wrote last week.

02 · Score

AI scores every call

The model scores every conversation against that standard, 0-100, with the exact line that earned each skill score. Automatic, no sampling.

03 · Validate

Humans keep it honest

Sales experts review and tune the scoring against real outcomes. The loop is the moat - the standard gets sharper, not drifts.

This is the difference between a referee and a highlight reel. CRM is the record. Gong is the tape. Big Sister is the referee that scores every game - against a standard a real sales organization can stand behind.

The Team

Sales and software,
one bench.

Big Sister started as a scoring system Val and Lucy built inside their own consulting practice. It worked. Today it is sales consultants who know the game and the engineers who turned it into a product.

Founders

Val Yaromenko

CEO

18 years in global sales. Founded White Sales and created its methodology, a book, a podcast, and education programs. Speaker and lecturer.

Lucy Yaromenko

COO

18 years in sales. Co-founded White Sales, led PropTech firm Creators.city as CEO, and ran sales and management recruiting.

Product & Engineering

Tata Hryhorieva

Product Owner

Turns the White Sales methodology into the product and the skill standard the score runs against.

Eric Callahan

Architecture & Delivery Lead

Owns architecture and delivery, and sits on the advisory board.

Volodymyr Kuzko

Back-End Engineer

Builds the back-end that turns raw conversations into Sales Scores.

Den Kondrashev

SalesTech Engineer

Connects calls, meetings, and CRM into the scoring pipeline.

Advisory Board

Gordon Daugherty

Executive Advisor

Executive advisor to the team on scaling and go-to-market.

Benjamin Schroeder

AI Strategy Advisor

Advises on AI strategy and applied machine learning.

Our foundation

Built on White Sales.

Big Sister AI runs on 17 years of real sales consulting. White Sales, co-founded by Valentyn and Lucy Yaromenko in 2009, has built sales systems for hundreds of companies across Ukraine and Europe. Before writing a line of code, we already knew what breaks when sales teams scale. That knowledge is embedded in every feature we ship.

White Sales on LinkedIn →

Recognition & Backing