HN Notifications – Get an email when a HN story matches your criteria

In plain words

HN Notifications sends email alerts when Hacker News stories match criteria you set. Users can customize which types of posts trigger notifications, making it easier to follow relevant discussions without constantly checking the site. The service launched in 2015 and is designed for people who want to stay informed about specific topics on Hacker News without manually browsing the platform.

written from the facts on this page · September 2026

• HR
  HN Replies – Get notified of replies to your comments2016 · hnreplies.com · ▲217
• HN
  HN Notify - Email reply notifications for comments and posts.2011 · hnnotify.com · ▲32

  Daily original takes and guides.

• HG
  HNNotify – Get emailed when a users reply to your HN Posts and Comments2018 · hnnotify.xyz · ▲66
• 
  HNWatch – Watch HN, filter stories, get e-mail alerts2017 · github.com · ▲18
• 
  Hacker News Slack Bot2022 · hn-slack-bot.vercel.app · ▲129

  Get Slack notifications for HN mentions

• 
  HN Mail – A topic-based newsletter service for Hacker News2018 · hnmail.io · ▲27

  Hacker News Tailored For You.

• 
  SimCity, but with Permits▲936

  A free city-building game in your browser. You are the mayor. You know what the city needs. Now get it past the zoning board, the neighbors, the appeals court and the next election.

  Life & fun · 3d ago · permit.petercai.com

• IV
  I've been paying for a rural Tanzanian's education for 10 years▲778

  Life & fun · 16d ago · tanzaniaeducationproject.org

• 
  Bigwords.page – Turn any screen into a sign. The URL is the app▲728

  Turn a phone, tablet or TV into a sign. Type a message and it fills the screen: welcome signs, timers, Wi-Fi passwords and more. No app, no account, free.

  Life & fun · 17d ago · bigwords.page

• 
  Guitoro, a virtual guitar you strum with your keyboard▲573

  Play a free virtual guitar online with your keyboard or by touch. Slow songs down and see every chord, string and strum. Acoustic, classic, electric and bass.

  Life & fun · 10d ago · guitoro.com

• 
  See *almost* any carriers phone settings▲432

  Carrier settings from iPhone, Pixel and Galaxy firmware, decoded and compared: APNs, VoLTE, 5G and Wi-Fi Calling per carrier, and what each build changed.

  Life & fun · 14d ago · carrierexplode.com

• 
  The whole Solar System and every tracked satellite, live in the browser▲407

  Life & fun · 24d ago · space.bl2.net

• 
  Periscope▲1,049

  Explore the world through someone else's eyes

  Life & fun · 2015 · periscope.tv

• 
  Product Hunt for Chrome▲898

  The best new products, every day, in your browser

  Life & fun · 2015

• 
  Amazon Dash Button▲772

  Place it. Press it. Get it.

  Commerce · 2015 · amazon.com

• 
  $Cashtags by Square▲722

  Get paid via $cashtags for things you do online or in person

  Commerce · 2015 · t.co

• 
  Gyroscope▲713

  A new OS for the human body

  Growth · 2015 · gyrosco.pe

• 
  Freebie.Supply▲669

  Awesome free things for entrepreneurs & startups

  Growth · 2015 · growth.supply