Voltaire.Si
Dare to think for yourself
Spar with a witty Enlightenment mind — Socratic dialogue that questions your assumptions, an argument workshop that sharpens your reasoning, and the great thinkers of the Enlightenment made vivid, from the salons of Paris to the study of Königsberg.
No card required · $9/mo Plus · $99/mo Premium
Three ways to think harder
Not a lecture — a sparring partner
Socratic Dialogue
Pick a theme — free will, tolerance, reason, justice — and think it through turn by turn. Voltaire questions your assumptions instead of lecturing.
Start a dialogue →Enlightenment Thinkers
Vivid primers on Voltaire, Rousseau, Locke, Kant, Diderot and Montesquieu — then debate any one of them, live and in their own spirit.
Explore the thinkers →Argument Workshop
State a position and watch it steelmanned, then met with the sharpest counterargument — the fastest way to find the holes in your own reasoning.
Stress-test an idea →Free to try — no account needed. Sign up to save your dialogues and unlock more.
What you get
Everything Voltaire.Si gives you
Socratic Dialogue Engine
Pick a theme — free will, tolerance, reason, justice — and think it through in genuine back-and-forth that challenges your assumptions without lecturing.
Enlightenment Thinkers
Vivid primers on Voltaire, Rousseau, Locke, Kant, Diderot and Montesquieu — then debate any one of them, live.
Argument Workshop
State a position and watch it steelmanned, then met with the sharpest counterargument — the fastest way to find the holes in your own reasoning.
Voltaire, With Wit
Philosophy delivered with authentic satire and a devotion to free speech, tolerance, and reason over dogma.
Critical Thinking, Trained
Spot fallacies, weigh evidence, and practice defending a view against its strongest objections.
Many Perspectives, Fairly Put
Ancient to modern schools presented in their strongest form — you decide what to believe.
Pricing
Simple plans that grow with you
Plus
$9/mo
- ✓Unlimited Socratic dialogue
- ✓Full thinkers explorer with live debate
- ✓Argument workshop with steelman + counter
- ✓Daily discussion prompts
Premium
$99/mo
- ✓Everything in Plus
- ✓Enlightenment deep-dive modules
- ✓Structured learning pathways with certificates
- ✓Primary source library
- ✓Multiple philosopher personas
- ✓Priority responses