Choose a topic and a side, and Debate Bot takes the opposite position and defends it properly: openings, rebuttals that answer your strongest point, closings, then a scored verdict it will happily lose if you outargue it. Free, no sign-up.
Every debate follows a clear format — opening statements, two rebuttal rounds and a closing — with one round per message so you always know whose turn it is. Word limits keep it tight.
When the rounds are over the bot switches to judge mode and scores both sides on logic, evidence, rebuttals and clarity. It names the winner even when that winner is you, then gives two concrete tips.
Use coach mode to prepare for a real debate, casual mode for a quick argument about whether a hot dog is a sandwich, or full rounds to sharpen how you think on your feet.
Can I pick any topic?
Almost — anything from silly to serious. It declines hateful positions and offers a reframed topic instead.
Does the AI always argue the opposite side?
In debate mode yes, so you always get a real opponent. Coach mode puts it on your side.
Is it free?
Yes, free and no sign-up needed.
How is the winner decided?
Both sides are scored 1-10 on logic, evidence, rebuttals and clarity after the closing round.