I built an interactive HN Simulator
Hey HN! Just for fun, I built an interactive Hacker News Simulator. You can submit text posts and links, just like the real HN. But on HN Simulator, all of the comments are generated by LLMs + generate instantly. The best way to use it (IMHO) is to submit a text post or a curl-able URL here: https://news.ysimulator.run/submit. You don't need an account to post. When you do that, various prompts will be built from a library of commenter archetypes, moods, and shapes. The AI commenters will actually respond to your text post and/or submitted link. I really wanted it to feel…
In plain words
The HN Simulator is an interactive recreation of Hacker News where users can submit text posts and links without creating an account. All comments are generated instantly by large language models using a library of commenter archetypes, moods, and styles, designed to respond authentically to user submissions. Built with Node, it allows users to submit URLs or text via curl, creating a realistic simulation of the discussion experience with AI-generated responses that aim to closely mimic genuine community interaction.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hey HN! Just for fun, I built an interactive Hacker News Simulator. You can submit text posts and links, just like the real HN. But on HN Simulator, all of the comments are generated by LLMs + generate instantly. The best way to use it (IMHO) is to submit a text post or a curl-able URL here: https://news.ysimulator.run/submit. You don't need an account to post. When you do that, various prompts will be built from a library of commenter archetypes, moods, and shapes. The AI commenters will actually respond to your text post and/or submitted link. I really wanted it to feel real, and I think the project mostly delivers on that. When I was developing it, I kept getting confused between which tab was the "real" HN and which was the simulator, and accidentally submitted some junk to HN. (Sorry dang and team – I did clean up after myself). The app itself is built with Node + Express + Postgres, and all of the inference runs on Replicate. Speaking of Replicate, they generously loaded me up with some free credits for the inference – so shoutout to the team there. The most technically interesting part of the app is how the comments work. You can read more about it here, as well as explore all of the available archetypes, moods, and shapes that get combined into prompts: https://news.ysimulator.run/comments.html I hope you all have as much fun playing with it as I did making it!
Does the same job
all alternatives →- FHFake Hacker News – See what HN has to say before you post2023 · fakehn.com · ▲107
Hi HN! I’ve been lurking for a while, but out of fear of being steamrolled by HN readers or maybe just natural introversion, I’ve always been too scared to post or comment. Which is why 1. this is my first real Hacker News submission 2. my friend Michael and I built "Fake" Hacker News, a place to post and see what AI-generated HN comments might say. Here’s a video of me using fakeHN to test this very submission: https://www.loom.com/share/4b9f4f9d7c77489a86baeb92ec55a1ed?... And an example of one of our generated posts:…
- MHMeet.hn – Meet the Hacker News community in your city2024 · ▲768
Hey HN! I just published https://meet.hn, a map to find hackers in your city. How it works? Demo of the signup process: https://x.com/meet_hn/status/1834918518904746329 1. Fill the form: username, city+country 2. Copy the text generated in the box below the form, and paste it in your HN description. 3. Click "Add me on the map" Optionnaly (it's recommended!) you can add links to your socials as well as some tags to showcase your interests. Why does it exist? I created this because, despite its harsh reputation on the internet, I love the HN community. I…
- EHExploring HN by mapping and analyzing 40M posts and comments for fun2024 · blog.wilsonl.in · ▲520
- MRMy recommendation engine for Hacker News2023 · hn-recommend.julienc.me · ▲314
Hi! I’m Julien and I built a recommendation engine for Hacker News. I feel like this website is a gold mine. Every day, I find some very interesting stories about a topic. And sometimes, I want to find other stories covering that same topic but I can’t. Hacker News has years of history of awesome discussion and ressources. Unfortunately, I think HN Algolia isn’t helpful in searching these old threads. As a student, I want to learn a lot from this website. This is why I created HN Recommend. Input a sentence or the URL of an article, and get the most popular and similar posts from Hacker…
- IAI asked an HN member for feedback and she blew my mind2010 · ▲453
A few days ago, I responded to a comment by bloggergirl offering to read anyone's web copy and help. I shot off an email hoping for a paragraph or two of feedback on my startup's copy. Instead I received a professional, detailed deck of tons of invaluable well thought out feedback. It must have taken her an entire afternoon. Here's a link to it: http://www.slideshare.net/shereefb/recommendations-for-bettermeans To top it off, this isn't someone with a lot of free time on her hands, she's only days away from launching her own startup (page99test) This community blows my mind!
- GSGenerate startup ideas based on HN comments2023 · hn-ideas.tjcx.me · ▲164
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