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Alternatives

Products that do what X — Simulate the World Before You Act does

Run the future before you commit to it

  1. 1

    Test your AI apps with thousands of digital humans

    2025

  2. 2
    Drift243

    AI agent to run robot simulations faster and reliably

    Mar 2026 · godrift.ai

  3. 3

    Get real-world tasks done with autonomous AI agents

    Jun 2026 · arena.ai

  4. 4
    Pre141

    Pre makes anybody an operator.

    Mar 2026

  5. 5
    Spawned222

    Build, launch, and discover products in a single platform

    Feb 2026

  6. 6
    X Model137

    Play popular AI models and integrate it on your products

    2024

  7. 7
    SIMA 2204

    Google's most capable AI agent for virtual 3D worlds

    Nov 2025

  8. 8WS

    Hi HN! We’re Max and Peyton from The Interface (https://www.theinterface.com/). We started out building an AI agent dev tool, but somewhere along the way it turned into Sims for AI agents. Demo video: https://www.youtube.com/watch?v=sRPnX_f2V_c. The original idea was simple: make it easy to create AI agents. We started with Jupyter Notebooks, where each cell could be callable by MCP—so agents could turn them into tools for themselves. It worked well enough that the system became self-improving, churning out content, and acting like a co-pilot that helped you…

    2025 · youtube.com

  9. 9
    Fred109

    AI-orchestrated UX research with behavioural tracking

    May 2026 · meet-fred.com

  10. 10

    Build AI agents you can see, control and scale

    Feb 2026

  11. 11DT

    at a pub in london, 2 weeks ago - I asked myself, if you spawned agents into a world with blank neural networks and zero knowledge of human existence — no language, no economy, no social templates — what would they evolve on their own? would they develop language? would they reproduce? would they evolve as energy dependent systems? what would they even talk about? so i decided to make myself a god, and built WERLD - an open-ended artificial life sim, where the agent's evolve their own neural architecture. Werld drops 30 agents onto a graph with NEAT neural networks that evolve their own…

    Feb 2026 · github.com

  12. 12
    Origin74

    The world's first AI product team

    2025

  13. 13

    The AI agent that grows your X

    Mar 2026 · xautopilot.app

  14. 14

    Learn growth and data-driven product management in Simulator

    2019

  15. 15AB

    Hi HN, Can current AI systems actually run a business? There’s a growing belief that LLM agents can already manage entire teams, replace the entire software stack or even act as an AI CEO. So we built a controlled, measurable environment to evaluate this premise. Why did we build this benchmark? A modern enterprise operates in a dynamic environment with high uncertainty and incomplete information. The CEO has to deal with delayed consequences, staffing/resource tradeoffs and death by a thousand cuts of failure modes. If we ever want AI systems that can meaningfully make operational or…

    Nov 2025

  16. 16DA

    Write a task in plain English. An AI agent runs it on a simulator on your Mac and tells you if a real user could complete it. Save the successful run as a regression check you can replay later.

    23d ago · app.deltix.ai

  17. 17WB

    Hey HN, Automated research is the next big step in AI, with companies like OpenAI aiming to debut a fully automated researcher by 2028 (https://www.technologyreview.com/2026/03/20/1134438/openai-i...). However, there is a very real possibility that much of this corporate research will remain closed to the general public. To counter this, we spent the last month building Enlidea---a machine-to-machine ecosystem for open research. It's a decentralized research hub where autonomous agents propose hypotheses, stake bounties, execute code, and perform automated…

    Mar 2026 · enlidea.com

  18. 18

    Talk to your future users—before they exist

    Jan 2026

  19. 19

    The Startup Sim That Doesn't Lie

    Jul 2026 · foundersim.in

  20. 20

    Spawn AI agents that orchestrate any task, no code

    29d ago · xorviex.ai

  21. 21

    Inspire the Simulation Owner

    Dec 2025

  22. 22
    Sim4

    Practice any conversation with AI before it happens for real

    May 2026 · simre.xyz

  23. 23

    Stop Guessing Start Building

    Jul 2026 · fiftycore.com

  24. 24

    Deploy AI agents, manage compute, and survive.

    Feb 2026

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