Spar – Your AI co-founder that remembers everything and challenges your decisions

Summary: Spar is an AI co-founder designed to assist solo business founders by remembering all past interactions, identifying contradictions, and challenging assumptions. It learns continuously through conversations, analyzes documents, and tracks goals to provide informed, critical feedback over time.

What it does

Spar retains detailed memory across sessions, flags conflicts between plans and goals, and adapts its tone using five co-founder archetypes. It supports document analysis, searchable history, proactive check-ins, session summaries, and guided onboarding to build a comprehensive business profile.

Who it's for

It is intended for solo founders and entrepreneurs who need a thinking partner to track decisions, challenge reasoning, and maintain business context over time.

Why it matters

Spar addresses the lack of a critical, memory-capable partner for solo founders, helping prevent overlooked contradictions and weak assumptions in business decisions.