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Products that do what I measured the half-life of 41,301 Show HN launches. It's 7 hours does

I scraped every Show HN from the last 12 months (41,301 posts) plus the full comment tree of every launch with 10+ comments, ~100k comment timestamps, all from the Algolia HN API. The median launch gets 2 points and 0 comments. For launches that do get traction, half the comments they'll ever get arrive within 7.2 hours and 90% within 26, and the top decile decays on the same clock as everyone else. Vote timestamps aren't public, so comment timing is the attention proxy; caveats are in the post. Everything reproduces from the repo with one command…

  1. 12G

    Community, All the HN belong to you. This is an archive of hacker news that fits in your browser. When I made HN Made of Primes I realized I could probably do this offline sqlite/wasm thing with the whole GBs of archive. The whole dataset. So I tried it, and this is it. Have Hacker News on your device. Go to this repo (https://github.com/DOSAYGO-STUDIO/HackerBook): you can download it. Big Query -> ETL -> npx serve docs - that's it. 20 years of HN arguments and beauty, can be yours forever. So they'll never die. Ever. It's the unkillable static archive of HN and it's…

    Dec 2025 · hackerbook.dosaygo.com

  2. 2EH
  3. 3IM

    I love HN but always felt the search with algolia is okay but does have some limitations. Since I work at Vectara I decided to try and create a better search for HN. It's based on data from roughly the last 6 months of HN stories and comments. Would love to hear feedback and how useful this is relative to the existing search.

    2024 · hackernews.demo.vectara.com

  4. 4IB

    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…

    Nov 2025 · news.ysimulator.run

  5. 5

    Show HN submissions peaked at 6.3x their ChatGPT-launch level, while the number of successful submissions remained relatively flat.

    25d ago · orangecrumbs.com

  6. 6IA

    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!

    2010

  7. 7HT
  8. 8AT

    Hi HN, I spent a few weeks looking at the top HN posts of all time. This included exploration, clustering, creating visualizations, and zooming in on what (to me personally) seems like some of the best discussions on here. Three things in this post: 1- The interesting groups of HN posts 2- The interactive visualizations that you can explore in your browser 3- The data from this exploration -- this includes CSV of the titles as well as the text embeddings of 3,000 Ask HN articles. Blog post about this whole process here: [1] ============ 1- The interesting groups of HN posts From the…

    2022

  9. 9CW

    Hey HN We loaded a BigQuery dataset of all of Hacker News, every comment, story and user, into camelAI. You can ask questions like: • “When does dang tend to comment during the day?” • “Which domains have gained the most submissions since 2015, year-over-year?” • “How has average comment length changed each January since 2007?” • “Top five users who link to arXiv papers the most.” It's behind a log-in to prevent abuse but free to use for 10 messages. No payment info required. We use OpenAI o3 or Claude sonnet 3.7 for the agent which can be really expensive. Would love feedback especially…

    2025 · app.camelai.com

  10. 10MR

    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…

    2023 · hn-recommend.julienc.me

  11. 11IM
  12. 12IA

    I built an archiver that tracked every HN item for 27 days (Dec 3-30, 2025) and captured 72k temporal snapshots to see how posts gain and lose attention. Key findings: - Early velocity (points&#x2F;hour in first 2 hours) predicts final score with ρ=0.82. A simple classifier achieves 98.4% precision for viral prediction. - No Matthew effect: high-scoring posts don't get more upvotes per hour than low-scoring ones (ρ=-0.04). HN's gravity penalty actually works. - Yet extreme inequality persists: Gini=0.89, meaning bottom 80% of posts get <10% of total upvotes. Inequality without cumulative…

    Dec 2025 · papers.ssrn.com

  13. 13ZA

    I built this last year but never posted it anywhere, but now with Reddit hiatus it seems like the right time to give it a shot. The main goal of zsync is to foster high quality content and discussion. That's it. If it can't accomplish that, then to me it is a failure. I watched Reddit go from having high quality discussion in 2008-9 to devolving into the PC meme dumpster it is today [1]. HN still has the highest discussion quality of any "forum" I know of, but (1) it can sometimes randomly be very hostile&#x2F;toxic to new tech, the most glaring example being crypto. (2) HN is basically a…

    2023 · zsync.xyz

  14. 14RO

    I was lucky enough to have my site trending on Friday (https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=25872922). It’s an icon site that lists open source icons. I wanted to share some stats on the results after 3 days. Worth noting was that I submitted it on a Friday morning (at which point I went for a walk and a coffee; eek). - 24,997 page views. I (embarrassingly) didn’t have GA set up when I first submitted it, so this is probably missing a few hundred page views - 21 “feedback” emails (half of which were spam). I assume such a high percentage of these were spam because my Feedback…

    2021

  15. 15HH

    Hi HN! A few days ago I saw a graph[0] that showed the # of job postings on HN was declining. I started wondering what other trends I could glean from the data, so I created this! You can filter through the top level comments by keyword; for example you can filter by "remote" to see the massive spike around March 2020. Another interesting thing I found is that I can compare hiring across cities. I hope you enjoy! I made it so that the links to your search are sharable so if you have some interesting data you should be able to just link the page you're on! [0]…

    2023 · hnhiringtrends.com

  16. 16

    Fifteen years of Show HN: the thirty-four repeat fliers and the top ten of every year. Volume 2 of 2.

    22h ago · artifactbin.dev

  17. 17SH
  18. 18IB

    Hey HN community, I built a tool that helps optimize your post for hitting the first page of Show HN. How it works: I used a Hugging Face dataset of all Hacker News posts from the past 3 years and trained a model that predicts how successful your post might be. There's still a lot of randomness on HN, so nothing is guaranteed, but the tool helps optimize your post for higher odds. A couple of interesting findings: - GitHub repo links work x3 better than regular domains - Open-source tools have a steady virality rate (13.9% - one of the highest) - "I built" outperforms "We built" - Using…

    May 2026 · wannalaunch.com

  19. 19RY

    Hi HN, I recently noticed a recurring visual artifact in the "Most Replayed" heatmap on the YouTube player. The highest peaks were always surrounded by two dips. I got curious about why they were there, so I decided to reverse engineer the feature to find out. This post documents the deep dive. It starts with a system design recreation, reverse engineering the rendering code, and ends with the mathematics. This is also my first attempt at writing an interactive article. I would love to hear your thoughts on the investigation and the format.

    Jan 2026 · priyavr.at

  20. 20DT

    Magnet link: magnet:?xt=urn:btih:44c65b5779d9d8021e002584fa73740f36d052a6&dn=10m_hn_comments_sorted Go to https:&#x2F;&#x2F;hn-archive.appspot.com&#x2F; for the torrent file &#x2F; source code. I'll be semi-frequently checking the story and answering any questions which may come up.

    2015

  21. 21SH

    I built this tool to help me find interesting discussions on Hacker News. I love reading HN discussions almost more than the articles themselves. However, I found that full text search, although highly performant, is not always good at surfacing interesting discussions on a certain topic -- especially if you don't know what to search for exactly. I built this by scraping the most recent ~6 million posts (that's about 2 years of history) and putting the resulting posts and their vector embeddings into Postgres. Let me know what could be improved, and if you'd like a more detailed writeup of…

    2024 · searchhacker.news

  22. 22SH

    I analyzed 10 years of Hacker News data (2016-2025) to track Show HN submission trends. - Show HN posts went from ~900&#x2F;month (2016-2019) to 3,315 in Dec 2025 - Share of all stories: 2.4% (2016) → 12.8% (Dec 2025) - Notable spikes: COVID-19 (2020), AI boom (2023), and accelerating growth through 2024-2025 Data source: HackerBook (144k Show HN posts &#x2F; 3.4M total stories)

    Jan 2026 · imgur.com

  23. 232Y

    We took the top 3 HN stories every day since October 2006 (~21K stories total), ran topic clustering on them, and visualized how topics rise and fall over time. You can zoom into any period - some patterns are surprisingly clear (AI overtaking startup culture as HN's top topic, crypto's rise and fall, remote work spiking with COVID). Happy to answer questions about the methodology.

    Mar 2026 · app.lenzy.ai

  24. 24IC

    I figured, "what better way to look at a list of (hopefully) inspiring projects?" The upvotes work and are globally synced.

    2024 · guycombinator.net

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