AI · alternatives · 2026
24 alternatives to AI-town, run your own custom AI world SIM with JavaScript
Hi HN community! We want to share AI-town, a deployable starter kit for building and customizing your own version of AI simulation - a virtual town where AI characters live, chat and socialize. Inspired by great work from the Stanford Generative Agent paper (https://arxiv.org/abs/2304.03442). A few features: - Includes a convex.dev backed server-side game engine that handles global state - Multiplayer ready. Deployment ready - 100% Typescript - Easily customizable. You can fork it, change character memories, add new sprites/tiles and you have a custom AI simulation…
AI-town is a deployable starter kit for creating custom AI simulations where autonomous characters live, interact, and socialize in a virtual environment. Built with TypeScript and powered by a Convex server-side game… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 3 we have checked on their own sites, 3 of them free or with a free tier. AI-town, run your own custom AI world SIM with JavaScript launched in 2023; newer entries below may have overtaken it.
- 1
AI town▲99A virtual town where AI characters live, chat & socialize
2023 · github.com · its alternatives →
- 2
- 3AA
This is a weekend project that spiraled out of control. I was originally trying to get Claude to play a ROM of the SNES SimCity. I struggled with it and that led me to Micropolis (the open-sourced SimCity engine) and was able to get it to work by bolting on an API. The weekend hack turned into a headless city simulation platform where anyone can get an API key (no signup) and have their AI agent play mayor. The simulation runs the real Micropolis engine inside Cloudflare Durable Objects, one per city. Every city is public and browsable on the site. LLMs are awful at the spatial stuff, which…
Feb 2026 · hallucinatingsplines.com · its alternatives →
- 4
SimplAIfree tier, from $5/mo▲589Hey HN, I've been building SimplAI for the past several months — it's a platform for building, testing, and deploying LLM-powered agents and multi-step workflows. The problem I kept running into: spinning up an AI agent pipeline means stitching together prompt management, tool calling, memory, evals, and deployment — often from scratch every time. SimplAI tries to be the layer that handles all of that so you can focus on what your agent actually does. What it does: - Visual + code-first workflow builder for chaining LLM calls, tools, and APIs - Built-in prompt versioning and A/B testing…
2025 · simplai.ai · its alternatives →
- 5
Construct Computerfree tier, from $9/mo▲378We are building Construct Computer a cloud OS where autonomous AI agents ("Constructs") live and do your day to day work. You can observe them in real-time through a desktop OS frontend. The idea is agent-native infrastructure: instead of agents being API calls, they're persistent processes with their own compute, storage, and network identity. With integrations with a vast ecosystem of business tools, the Construct Agent can do anything from scheduling meetings, preparing documents, to deep researching the web, join meetings, and automate long running business operations with minimal human…
Aug 2026 · construct.computer · its alternatives →
- 6
Character AI▲393Building the next generation of conversational AI
2023 · character.ai · its alternatives →
- 7
Create custom GPT-3 AI models in minutes, with No Code
2022 · its alternatives →
- 8
Dropstone 3free tier, from $15/mo▲206I’ve been trying out Dropstone, a new IDE with a self-learning AI that actually adapts to how you code. Unlike Cursor or Claude, it runs locally, has no token limits, and gets better the more you use it. What impressed me is that it learns from your edits and naming patterns while keeping everything private on your own system. It even explains its reasoning for every suggestion and has quick undo and fallback options that keep you in flow. It genuinely feels like coding with an assistant that remembers you.
Feb 2026 · dropstone.io · its alternatives →
- 9
EmemeAI▲185Create & Export AI characters to apps and games
2025 · video2motion.org · its alternatives →
- 10
- 11
Free Real-World Intelligence: Give Your AI Real-Time Access to the Physical World. Grassland lets developers give their software an API for accessing real life environments regardless of economic, geographic or political barriers.
2019 · grassland.network · its alternatives →
- 12TP
Hi HN, I have been working on this website for a few weeks with some buddies of mine and would love if you checked it out. TuringJest provides a jackbox-esque experience with its two game modes. *One Shot Prompt* - Submit a prompt for all players (including the AI) to answer. - Answer your prompts in the way that you think ChatGPT would answer them. - Vote for who you think the real AI is. *Talk It Out* - Plan an event in a group chat with your friends. - Trick everyone into thinking you are the AI while voting for the real AI. Let me know what you think!
2023 · turingjest.app · its alternatives →
- 13
Viberia▲146Hey HN, This is my take on the agent harness. Everything on an isometric map. Agents are grouped into "buildings" that run in a sequence or a loop; e.g., the CodeForge has an agent that writes a PRD, another one that implements, and a third that reviews. Everything is customizable, you build your own buildings/teams however you want. It's a Tauri app, really light (about 8x less energy than the closest competitor I benchmarked, so it actually runs from a coffee shop on battery). It's macOS only for now, but ping me if you are willing to test the Windows or Linux version. I've been…
May 2026 · getviberia.com · its alternatives →
- 14
Exists▲132Generate your own 3D worlds and team-deathmatch in minutes
2025 · exists.ai · its alternatives →
- 15
Building on the concept of generative agents and the success of c.ai, we created Simtown.ai, a 2D NPC simulation where each NPC leverages OpenAI APIs to plan, act, reflect, and adapt. The gameplay is dynamic and immersive—NPCs can move, talk, and idle in scenarios like Harry Potter Town or perform role-specific actions such as voting, giving speeches, and listening in Election Town [https://app.simtown.ai/electiontown]. We’re currently working on features like saving and loading game states, allowing users to create their own NPCs, and enabling user-personas to evolve over…
2024 · app.simtown.ai · its alternatives →
- 16
Fast, secure local AI workflows with minimal setup
2024 · github.com · its alternatives →
- 17
Bring Your Imagination to Life – Instantly.
2025 · vadoo.tv · its alternatives →
- 18
Livinity▲90Open-source homeserver OS with a built-in AI agent
Jul 2026 · livinity.io · its alternatives →
- 19
- 20
Dear Hacker News, I'm kindly asking for your participation in the open beta for my AI-managed mini-games website. Thank you in advance! For a limited time window, I'm setting the all-free feature flag to true. I hope you have a lot of fun exploring the AI's sense for games! Here and there, I tweaked it to help with visual consistency. I would be deeply grateful if you opted into analytics. $2,300 in API tokens... Cheers!
Jun 2026 · minigames.world · its alternatives →
- 21
I made this experimental art project/game that's an LLM chat assistant, but where you're the AI. I wanted people to get a visceral sense of what it's like to answer the kinds of things that people prompt their chatbots day in and day out. If you're interested, I wrote up some more info on how I made it, including how the "user" prompts are generated with an eye for realism: https://bethechatbot.com/about Hope you enjoy it! I'd love to hear people's takeaways.
Jul 2026 · bethechatbot.com · its alternatives →
- 22
Enjoy private or group chat with various AI based on ChatGPT
2023 · its alternatives →
- 23
AliveAgain▲18Create & deploy custom AI agents to represent you online.
2025 · v0-alive-again-landing-page.vercel.app · its alternatives →
- 24
We just open sourced a first class our AI web app builder. Instead of using another hosted AI coding platform, you can fork this project and build your own AI app builder, fully customized and running under your own brand. It includes: Next.js + TypeScript AI chat with streaming Artifact generation File explorer Code editor Live preview Databases Sandboxes to be used by AI agents Versions Responsive production-ready UI And a lot more... The only required dependency is the Totalum API, which exposes the AI generation engine through a simple REST API. You can replace or extend the backend…
Jul 2026 · github.com · its alternatives →
Also compare
Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →