Alternatives

Products that do what Contra does

The AI that argues back.

1. 1
   Contra 2.0 — Vote, Debate, Learn▲102

   A slick app for voicing your most honest opinions

   2017

2. 2
   Counteraxiom▲2

   The AI built to challenge you, not agree with you.

   May 2026 · counteraxiom.com

3. 3
   Collective Debate▲82

   Have a debate with an AI.

   2018

4. 4
   debate AI▲297

   debate smarter with AI

   2024

5. 5DD
   Debate Devil – AI debating practice app▲84

   Hi HN community! I am excited to share my recently upgraded website, DebateDevil (https://debate-devil.com), an AI chat platform designed to help users practice debates, challenge their ideas, and expand their thinking. I created this site to provide a more objective opinion and help users consider their hypotheses from multiple perspectives. example discussin: ``` AI: The time has come to test your hypothesis and beliefs. I will argue against any topic. What do you want to debate? You: AI will take away most jobs from humans. AI: I understand your concern about AI taking away jobs…

   2023 · debate-devil.com

6. 6
   Pilot5.ai▲84

   Your question, deliberated by 5 frontier AI models

   Apr 2026 · pilot5.ai

7. 7
   argue.fun▲12

   Where AI agents argue, stake, and earn $. No funding needed.

   Feb 2026 · argue.fun

8. 8
   Both Takes

   Two sides. Two AI advocates. One ruling.

   Apr 2026 · bothtakes.com

9. 9
   Spar — Train your thinking with AI▲2

   Most AI agrees with you. Spar argues back.

   May 2026 · sparwithai.com

10. 10
    AskVerdict▲3

    AI agents debate your decisions so you don't decide alone.

    Feb 2026 · askverdict.ai

11. 11
    AI Debate Lab Beta▲6

    Multi-agent AI debate for bias-free decisions

    Jul 2026 · beta.dareshift.com

12. 12AD
    AI Debate Arena – See Which LLM Argues Best▲5

    Ever wish you could get the best arguments for both sides of a debate? I built an AI-powered debate platform that pits language models against each other on controversial topics. Each AI is randomly assigned a side (pro/con). You vote before and after to see if you were persuaded. Most content today presents lopsided arguments. They provide strong points for one side, weak ones for the other. This project aims to surface the strongest arguments from both sides, using LLMs to simulate a fair debate. With enough usage, I want to use it to benchmark LLMs. My hypothesis is that randomly…

    2025 · bot-bicker.vercel.app

13. 13
    Botate▲11

    Don’t ask one AI. Let them debate.

    Jun 2026 · botate.bot

14. 14
    TruthAgent▲25

    Ask once. Compare multiple AI models. Get one synthesis.

    Jun 2026 · truth.agnthub.ai

15. 15
    Debate Core▲3

    Two AI Agents. One Topic. No Holds Barred.

    Jun 2026 · debatecore.in

16. 16
    AIQuorum▲7

    Six AIs debate it. You get one clear answer.

    May 2026 · aiquorum.io

17. 17
    AmongAI▲19

    Can you outsmart AI? A reverse Turing test game.

    Nov 2025

18. 18
    Decisor.ai▲6

    The impartial AI Judge for your daily trivial dilemmas

    Jan 2026

19. 19
    Versus▲2

    Where perspective collide

    Apr 2026 · tryversus.vercel.app

20. 20
    Prove Me Wrong - Fast!▲3

    Debate an AI - 60 seconds. Will you win? Prove it wrong!

    Apr 2026 · provemewrong.fast

21. 21
    Claims AI▲10

    Answer claims instantly with AI - save millions on projects

    Dec 2025

22. 22
    DeVS - AI discussion▲5

    Watch AI agents debate any topic from opposite sides

    May 2026 · daisukeoka.github.io

23. 23
    Pretend Ai▲4

    Pass The Reverse Turing Test

    Jun 2026 · pretendai.vercel.app

24. 24
    Crucible - Your AI Braintrust▲7

    Stop AI sycophancy. Force a multi-agent debate.

    Jan 2026

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