Join weekly debates, receive instant AI coaching on every speech, and develop your argumentation in a structured, moderated space built for respect and rigour.
Every speech, analysed
After every speech you submit, DebateSphere generates structured feedback across five dimensions: argument strength, evidence quality, rhetorical clarity, refutation, and overall impact. You see exactly where you are strong and where precision is lacking.
The system detects logical fallacies, flags unsupported claims, and surfaces counterarguments you left on the table — not as a verdict, but as a tool for deliberate improvement round by round.
Overall
Strengths
To improve
Missed opportunity
The opposing side's burden-of-proof argument was left unaddressed — engaging it directly could have secured the round.
The Process
Browse this week's motions curated for your division.
Pick a debate group and choose your side, Pro or Con.
Coordinate with your team in a private room.
Submit speeches in structured WSDC order, one turn at a time.
Receive instant, structured coaching after every speech. Scores are published, ratings updated, and your record grows.
Every round updates your ELO rating. Climb the leaderboard in your division, earn badges for consistent performance, and build a public record of your best debates.
Platform Features
Fresh motions every week for each division, curated for relevance, nuance, and debatability.
Every speech receives instant structured feedback on argument quality, evidence, refutation, and delivery. Learn faster with every round.
Four speakers per side. WSDC-inspired order: Opening, Rebuttal, Extension, Summary.
Spar with AI opponents anytime. Choose a persona, a format, and a position. Train before you compete.
Coordinate in real time with your team. Isolated, with no cross-team visibility.
An ELO-based rating system tracks your growth across every round. Climb the leaderboard in your division.
Dedicated moderators oversee every debate. Youth and Open divisions remain fully separate.
Every completed debate becomes a public, shareable page. Build a portfolio of your strongest arguments.
Fast-paced 2v2 and 3v3 lobbies with rating-based matching. Speed meets structure.
Practice Mode
Practice against AI opponents anytime. Choose from four distinct personas — Academic, Devil's Advocate, Pragmatist, or Populist — across any motion and format. Every practice session delivers the same coaching feedback as a real round.
Our Mission
The internet can be chaotic, hostile, and overwhelming. DebateSphere exists to provide a different experience: a structured, thoughtful, and respectful space where ideas are tested through evidence and reasoning, not through volume and aggression.
We believe that the ability to construct and defend a coherent argument is one of the most valuable skills a person can develop. It builds confidence, critical thinking, and empathy, and it begins with having a safe place to practise.
Join the communityCode of Conduct
Address positions and reasoning. Personal attacks, harassment, and identity-based criticism have no place here.
Claims are supported with sources, logic, or lived experience. Aggressive repetition is not an argument.
Speak in your turn, yield when your turn ends. Moderators enforce structure so every voice is heard.
Full conduct rules are shown at signup and enforced by our moderation team.
Week 16 motions are live and recruiting. Join a debate, start a practice session, or browse the featured transcripts from this season.