The AI that challenges
your ideas before
the world does.
Test your beliefs. Find blind spots. Build stronger thinking. Sparr doesn't give you answers — it gives you pressure.
The problem
Everyone has opinions. Almost nobody pressure-tests them.
The internet rewards confidence over reasoning. Most AI rewards the same. You leave conversations more certain — and often more wrong.
Sparr
Conversations where your thinking gets stronger.
Bring an idea, a belief, a decision. Sparr probes the assumptions underneath. You don't leave with an answer. You leave with an idea that can hold weight.
Three steps. One stronger mind.
How it worksBring an idea
Anything from 'AI will replace engineers' to 'I should drop out of college.'
Face pressure
Choose a perspective — Scientist, Founder, Skeptic — and defend your reasoning.
Gain clarity
Receive a Reflection Report exposing strengths, blind spots, and what to explore next.
Choose your challenger.
Six lensesThe Scientist
Evidence over assumptions.
Demands measurable claims, controlled comparisons, falsifiability.
The Philosopher
Question the foundation.
Surfaces hidden premises, definitions, and value judgments.
The Historian
Find patterns in time.
Tests claims against precedent, cycles, and prior outcomes.
The Economist
Follow incentives.
Traces second-order effects, trade-offs, and incentive structures.
The Skeptic
Find the weakness.
Probes for the single weakest link in the argument.
The Founder
Test reality.
Pressure-tests the idea against execution, users, and the market.