Knock – Notification Infrastructure for Developers
Hey HN! I’m Chris – one of the co-founders at Knock (https://knock.app). Knock is notifications infrastructure for developers. We provide a set of flexible API primitives you can use to power complex notification systems, without having to roll your own notifications infrastructure in-house. In short: we built notifications so you don’t have to. We learned about scaling notifications systems the hard way. Previously, my co-founder and I worked together at Frame.io, where we saw the upside of product notifications as well as the pain involved in building and maintaining them. With…
In plain words
Knock is a notification infrastructure platform for developers that provides APIs and tools to build complex notification systems without managing infrastructure in-house. It enables developers to quickly deploy real-time in-app feeds and integrations with services like Slack, Discord, and Teams. The platform is designed to reduce development time and complexity for companies that need to scale notification systems at their product.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hey HN! I’m Chris – one of the co-founders at Knock (https://knock.app). Knock is notifications infrastructure for developers. We provide a set of flexible API primitives you can use to power complex notification systems, without having to roll your own notifications infrastructure in-house. In short: we built notifications so you don’t have to. We learned about scaling notifications systems the hard way. Previously, my co-founder and I worked together at Frame.io, where we saw the upside of product notifications as well as the pain involved in building and maintaining them. With Knock, we’re building the product we wish we had then. Knock gives you: - Faster time to market. Our customers have used Knock to ship real-time in-app feeds and 3rd-party chat integrations (Slack, Discord, Teams) in under an hour. - A flexible notification engine. Power use cases such as batched notifications, conditional sends based on read or device status, and per-user preferences. - A toolkit built for product notifications. Knock comes with isolated environments, versioning, and complete observability from API request, workflow execution, to notifications sent. We’re excited to share Knock with you today and to get your feedback on what we’ve been building. The best place to start is in our docs (https://docs.knock.app/). You can learn more about what we’re up to in this Twitter thread: https://twitter.com/samseely/status/1504462708095262724?s=20&t=nIv6QpdMJ-scflu8i1Z2gA.
More dev tools this month
the category →
Open-source GTM skills for technical founders
Dev tools · 29d ago · gtmcofounder.com
OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 1d ago · opentrailpaper.com
Launched alongside, March 2022
the whole month →- IM
Hi HN! I made many small web games in the past with Unity or Phaser. But this time I wanted to make something completely on my own. So I coded a basic game framework in plain JavaScript, and used it to make Almost Pong. This was a really fun project that taught me a lot about JavaScript, and I plan to make more minimalist games with this framework. Interesting fact: Almost Pong doesn't load any assets, all sprites and sounds are generated with code. Happy to answer questions, and please let me know if you have any feedback on the game. Thanks!
Dev tools · 2022 · lessmilk.com
- IM
Life & fun · 2022 · networksfromscratch.com
- HA
Paste the following into the console of any HN page - for annotated avatars on all HN comments. (self contained code) for(u of document.querySelectorAll('.hnuser'))for(u.prepend(c=document.createElement('canvas')),x=c.getContext('2d'),c.width=18,c.height=14,s=u.innerText,r=1,i=28+s.length;i--;i>>29>X*X/3+Y/2&&x.fillRect(6+2*X,2*Y,2,2)&x.fillRect(6-2*X,2*Y,2,2):r+=s.charCodeAt(i-28,x.fillStyle='#'+(r>>8&0xFFFFFF).toString(16)))r^=r>>17,r^=r>2
Dev tools · 2022
- AG
Life & fun · 2022 · backofyourhand.com