Alternatives

Products that do what Spar — Train your thinking with AI does

Most AI agrees with you. Spar argues back.

1. 1
   debate AI▲297

   debate smarter with AI

   2024

2. 2
   Collective Debate▲82

   Have a debate with an AI.

   2018

3. 3
   Spellar 3.0▲534

   AI Meeting companion with cross-meeting memory

   May 2026 · spellar.ai

4. 4
   Spar▲6

   Your AI co-founder that remembers everything + never agrees

   Feb 2026 · sparai.co

5. 5
   Second Brain for AI▲286

   Persistent memory for Claude, ChatGPT & Cursor. Free.

   May 2026 · github.com

6. 6DD
   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

7. 7
   Marx Finance▲246

   AI agents debate the markets

   May 2026 · marx.finance

8. 8
   Roundtable.now▲50

   Multiple AI models debating & brainstorming together 🤩

   2025

9. 9
   Promptr for AI▲32

   The context manager and skills library for marketing teams

   Apr 2026 · promptr.ai

10. 10
    Counteraxiom▲2

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

    May 2026 · counteraxiom.com

11. 11
    spar ai▲1

    you know what to say. you just can't say it yet.

    Apr 2026 · spar-ai.vercel.app

12. 12
    AI Debate Lab Beta▲6

    Multi-agent AI debate for bias-free decisions

    Jul 2026 · beta.dareshift.com

13. 13
    The Socratic Arena▲1

    Train your reasoning through live AI-judged debates

    19d ago · socratic-arena.vercel.app

14. 14
    DeVS - AI discussion▲5

    Watch AI agents debate any topic from opposite sides

    May 2026 · daisukeoka.github.io

15. 15
    Botate▲11

    Don’t ask one AI. Let them debate.

    Jun 2026 · botate.bot

16. 16
    Debate Core▲3

    Two AI Agents. One Topic. No Holds Barred.

    Jun 2026 · debatecore.in

17. 17
    Crucible - Your AI Braintrust▲7

    Stop AI sycophancy. Force a multi-agent debate.

    Jan 2026

18. 18
    DebateLLM▲2

    Watch ChatGPT Claude, Gemini & Grok debate each other live

    Mar 2026

19. 19AD
    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

20. 20
    Contra▲2

    The AI that argues back.

    May 2026 · contra-app.cloud

21. 21
    Debate Arena

    Practice debate against AI — get coached after every session

    Apr 2026 · debatearena.zchase.studio

22. 22
    argue.fun▲12

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

    Feb 2026

23. 23
    Dehurdle▲17

    Practice high-stakes sales, support, and leadership conversations with real-time AI. Get instant speaking pace feedback and 210-competency scoring with zero voice storage.

    18d ago · dehurdle.com

24. 24
    AskVerdict▲3

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

    Feb 2026 · askverdict.ai

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