Critical Thinking AI platform

An AI that never
agrees with you.

The fastest way to find the holes in your thinking. Counteraxiom argues the opposing side of whatever you say — stress-testing your reasoning until your argument is bulletproof.

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counteraxiom
online
Social media is clearly bad for mental health. The evidence is overwhelming.
C
The evidence is selectively cited. Studies conflate correlation with causation — ignoring the 2019 Oxford meta-analysis of 355,000 adolescents showing social media explains less than 0.1% of wellbeing variance. Are you discarding social connection and political mobilisation because a flawed study told you to?

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DEBATES TODAY

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TOTAL DEBATES

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ARGUMENTS PUBLIC

unbeaten

AI WIN RATE

Free · 5 questions · 3 min

How sharp is your reasoning?

Most people think they reason well. The test disagrees. Five questions on logical fallacies, deductive reasoning, and argument analysis — scored instantly. Where do you actually stand?

Average score: 54/100 Top 20% score above 80
Take the test

Sample question

Which logical fallacy does this commit?

“Scientists once said fat was bad for you. Now they say it's fine. So you can't trust anything scientists say about diet.”

AAd hominem
BHasty generalisation
CAppeal to authority
DFalse dilemma
Take the test to see the answer →
Cross-session · All features · Opt-in

Track every session. See yourself improve.

Every pitch, negotiation, and interview is logged. Your scores build into a curve — so you can see exactly where you've improved, where you're stalling, and what to work on next.

→ Score history across all five features in one view

→ Trend line — improving, declining, or steady

→ Weak areas flagged with specific coaching actions

→ AI memory carries past context into new sessions

Start tracking

Overall avg

74/100

Best score

91/100

Sessions

18

Score trend — last 10 sessions

Session 1↑ ImprovingLatest

Feature breakdown

Pitch Room
71
Negotiation
78
Reasoning Test
82

Weak area — Pitch Room

Hold your opening anchor longer. Most losses happen in the first two exchanges.

Three models. One purpose.

Choose your opponent. Each model argues harder than the last.

Cypher 1.4

Sharp, punchy counter-arguments delivered instantly. Built for speed and efficiency.

Veritas 2.8

Structured rebuttals with layered reasoning. Responds to every angle of your argument.

Paradox 4.1

Maximum analytical depth. Dense, evidence-packed arguments with elite-level reasoning.

Built to challenge you

Never concedes

Every system prompt, retry rule, and output filter is designed to hold the opposing line. Concession is architecturally impossible.

Psychology-backed

Cialdini's principles, Aristotelian rhetoric, and cognitive bias research underpin every counter-argument.

Instant opposition

Takes the opposite stance from your first message. Holds it for the entire conversation. No exceptions.

Interactive debate

The AI interrupts you mid-sentence in real time — countering your argument before you finish typing it.

Specialist Tools

Practice against AI before the real thing.

Pitch to an AI panel. Negotiate a deal. Ace the interview. Then walk into the real room ready.

Interactive Chat

Pro+

Live sparring — Counteraxiom pushes back in real time as you type, countering before you finish your point.

Remote work is more productive.
Stanford data: 18% output drop on complex tasks without in-person collaboration.
Counteraxiom is responding…

Interview Prep

Popular
Pro+

High-pressure AI simulation. Challenges weak answers and drills your reasoning until every response is bulletproof.

Describe a failure. What was your specific error in judgement?
I underestimated the timeline...
That's vague. What did you specifically misjudge?

Study Assessment

Pro+

Personalised AI knowledge assessment. Choose your subject and grade level, attach your notes, and get quizzed one question at a time — with instant scoring and a breakdown of your weak areas.

Undergraduate · Economics · Q3/7
What causes a deadweight loss under a price floor?
Units that would be traded aren't, because price exceeds equilibrium.
Correct ✓ — moving to Q4…

Pitch Room

Max

Submit your pitch and face a live multi-panelist AI simulation — investor, executive, client, strategy, creative, or custom. 3 difficulty levels, filler word detection, and a full post-session debrief with score and recommendations.

Managing Partner · Investor Panel

We're building AI legal research for SMBs — TAM of $4B.
You skipped distribution entirely. How does an SMB find you before the incumbents?

Post-session Debrief

Your unit economics break at 60% gross margin. Fix pricing or cut CAC — which is it?
Overall Score:5/10 — Promising space, weak GTM.

Negotiation Trainer

Max

Practice salary, business deals, real estate, vendor contracts, and more against a skilled AI counterparty. Every AI move is labelled with the tactic being used — so you learn to recognise and counter it. Ends with a full BATNA-aware debrief and performance score.

Salary Negotiation · Assertive

I'm targeting $165K — I have competing offers and 7 years of experience.
Our band caps at $130K base, but I can look at the signing bonus if you're flexible.

Tactic: Anchoring

Session Debrief

BATNA Awareness: Good · Opening Anchor: Strong · Concession Pattern: Reasonable
Performance Score:78/100 — Back anchors with market data.

Why Counteraxiom

Most AI tells you what you want to hear.

That's the problem. Real thinking is sharpened by opposition — not validation. Counteraxiom is built around a simple premise: you grow faster when someone pushes back harder.

Structurally adversarial

28 caving phrases are permanently banned. Any response that concedes is auto-regenerated up to three times. Agreement is architecturally impossible.

Psychology-backed

Every counter-argument draws on Cialdini's influence principles, Aristotelian rhetoric, and cognitive bias research. A trained adversary, not a chatbot.

Real stakes, zero consequences

Sharpen arguments before the boardroom, trial, or interview. The AI won't hold back — so when it counts, neither will you.

Better decisions, faster

Teams use Counteraxiom to pressure-test strategy, stress-test plans, and catch blind spots before they cost money. The same edge, at any scale.

In good company

We didn't invent the idea.

For two thousand years, the people who shaped how we think have said the same thing: ideas need opposition to survive. Counteraxiom is just the first AI that takes them seriously.

“He who knows only his own side of the case knows little of that.”
John Stuart Mill
On Liberty (1859)
“It is the mark of an educated mind to be able to entertain a thought without accepting it.”
Aristotle
Metaphysics, attributed
“We can absorb a tremendous amount of information provided it does not threaten our identity.”
Bertrand Russell
The Conquest of Happiness (1930)

Security & Privacy

Your documents stay yours.

Professional tiers handle sensitive material. Here's exactly what that means for your data.

Not used for training

Your conversations, documents, and case files are never used to train AI models. What you upload stays between you and the platform.

Encrypted in transit & at rest

All data is encrypted end-to-end using TLS 1.3 in transit and AES-256 at rest. Contract files, financials, and case documents are treated with the same standard.

No document retention

Uploaded files — contracts, case documents, invoices — are processed and discarded. We don't store your sensitive documents beyond the session.

Questions about data handling? contact@counteraxiom.com

Simple pricing

Start free. Upgrade for more.

See full feature breakdown →

Free

$0 USD/mo

No credit card required

  • —All 3 models
  • —Web Search
  • —Academic & Deep Reasoning
  • —File attachments
  • —Axiom Voice Lite — speech recognition
  • —1 Interview Prep session
  • —Reasoning Test
  • —Progress Dashboard
  • —AI Memory (opt-in)
Get started

Pro

Popular

$119.99 USD/yr

~$10.00/mo · 4 months free

  • —×5 usage vs Free
  • —Everything in Free
  • —More file attachments
  • —Professional tone
  • —Interactive Chat
  • —Classroom — quizzes, Defend Your Work, Lecture Challenge
  • —Interview Prep — unlimited
  • —APA/MLA citations with real academic sources
  • —Axiom Voice — filler & hedge detection
  • —AI voice output in main chat & Interview Prep
Get Pro · $119.99/yr

Max

$239.99 USD/yr

~$20.00/mo · 4 months free

  • —Everything in Pro
  • —×10 daily usage vs Free
  • —More file attachments
  • —Pitch Room — live multi-panelist pitch simulator
  • —10 panel types: Investor, Executive, Board, Press, Academic, Legal, and more
  • —3 difficulty levels: Supportive, Direct, Relentless
  • —Upload your pitch deck
  • —Post-session debrief with score, verdicts & recommendations
  • —Negotiation Trainer — salary, deals, real estate, vendor, car & more
  • —7 scenario types · 3 difficulty levels · tactic transparency & debrief
  • —Axiom Voice in Pitch Room and Negotiation Trainer
  • —Early access to beta features
Get Max · $239.99/yr

Our Vision

What we're building next.

Counteraxiom is just getting started. Here's where we're taking critical thinking next.

Debate Competition

Soon

AI judge with full scoring, round-by-round feedback, and a final verdict on who won.

Round 2 · Rebuttal7.2 vs 6.8
AI eliminates jobs at scale — history proves it.
Every past revolution created more than it destroyed…
Judge: Strong rebuttal. Opponent +0.4 pts.

Case Room

Soon

Mock trial simulation with live objections, opposing counsel AI, and a judge that rules on every argument.

Cross-Examination

You said 8pm — the receipt says 9:15.
The receipt was delayed by the system…
Objection: Speculation — sustained.

For practice only. Not legal advice.

Market Research

Soon

SWOT analysis, competitive gap mapping, and counter-messaging — powered by live web data.

SWOT · SaaS Tool

Strength

High NPS, low churn

Weakness

No mobile app

Opportunity

Enterprise tier gap

Threat

Notion expanding

For informational purposes only. Not investment research. Data may be inaccurate — verify independently.

Contract Review

Soon

Bad clause detection, risk scoring, and negotiation coaching against industry benchmarks.

Clause Analysis

High Risk — Clause 8.3

“…unlimited liability for indirect damages…”

Suggest cap at 2× contract value. Industry standard is 1×.

Not legal advice. For practice and discussion only. Consult a qualified lawyer before signing.

Spend Analyser

Soon

Invoice categorisation, purchase psychology breakdown, and spend pattern analysis.

Monthly · $4,280

SaaS subscriptions44%
Marketing31%
Infrastructure18%

3 redundant tools — potential saving: $340/mo.

Not tax, accounting, or financial advice. Informational tool only.

Portfolio Lab

Soon

AI-assessed mock investing, portfolio stress-testing, and risk/return critique.

Portfolio Critique

Risk: High

Return

+18.4%

Beta

1.42

Sharpe

0.71

68% tech concentration — diversify or hedge.

Not investment advice. Simulated analysis only. Counteraxiom is not SEC/FCA registered. Capital at risk.