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Troubleshooting channel_not_found in Slack incoming webhooks
Learn how to resolve the channel_not_found error when using Slack's Incoming Webhooks to send messages to different channels.
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The top 5 push notification providers in 2025
An in-depth look at the top 5 push notification providers in 2025 to power native device notifications.
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How we think about writing for robots with llms.txt
A deep dive into how we built our llms.txt file for our docs.
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Why you should personalize your notifications with Reverse ETL
Use reverse ETL to create data-driven notifications that can increase engagement within your product.
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The product manager's guide to collaboration notifications
How to send delightful collaboration notifications and accelerate the engagement loops in your product.
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Notification template management that scales
How to write future-proof requirements for a template management system that can grow with your notifications.
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How Mentimeter serves a 4x increase in enterprise customers with Knock
Mentimeter implemented cross-channel in-app and email notifications to help teams within enterpises collaborate on presentations.
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Building effective component libraries: a startup perspective on design systems
How we approach building and maintaining our component library at Knock
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Building a translation CI/CD pipeline with Lingo.dev
A step-by-step guide to building a translation CI/CD pipeline using Lingo.dev and Knock to automate localization for your app's notifications.
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5 cross-channel notifications for marketplaces that increase engagement
Learn how to increase engagement and sales in a marketplace with brand consistent, cross-channel notifications.
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Marketplace notifications with Knock and Next.js
A guide to creating marketplace notifications patterns in Knock.
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How to use inventory notifications to grow a marketplace
Learn how successful marketplaces like eBay, Zillow, Lyft, and Discogs use inventory notifications to create engagement and grow their platforms.
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Announcing TeamsKit: The easiest way to build a Microsoft Teams integration
Today we're excited to announce TeamsKit, a set of embeddable UIs and APIs that make it simple to integrate your product with Microsoft Teams.
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How to grow a marketplace with in-app messaging
Learn how two-sided marketplaces increase engagement and sales with in-app notification experiences.
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How to free your engineers from notification support tickets
Learn the benefits of giving customer teams access to notification logs.
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How to localize and translate your notifications
An in-depth guide that covers several popular localization and translation libraries and how to use them with Knock's translation management features
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How to think about Slack and Teams as notification channels for your SaaS app
In this blog post we'll walk you through the nuances of Slack and Teams and how to think about them as notification channels.
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The notifications you need to be enterprise-ready
The role that notifications play in enterprise-ready workflows. Learn about building powerful notification flows for enterprise customers.
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Our 2024 letter to the Knock community
As we close 2024 and get ready to spend time with family, I sat down with Chris to write our annual reflection on the year and where we’re going next.
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How Gorgias improved customer service response times by 27% with Knock
Gorgias scaled their notification infrastructure to handle 15 million monthly notifications while improving customer support response times.
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State of notification infrastructure report 2025
In our inaugural state of notification infrastructure report, we surveyed teams about the tools, strategies, and metrics they use to power customer engagement.
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How Discogs powers its global music marketplace with Knock
Discogs replaced the notification system within their monolithic application with Knock.
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How Bounce scaled marketplace notifications with Knock to fuel 20x revenue growth
Bounce automated multi-channel notifications across 13,000 locations while maintaining a lean engineering team.
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How Causal shipped cross-channel notifications to reach enterprise customers
Causal replaced their email and in-app notification system with Knock, significantly improving developer productivity
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How to build a custom inbox with Next.js and Knock
An in-depth guide that covers building a real-time inbox using Next.js, shadcn/ui, and Knock
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Building an inbox to simplify support
An interview with Mike Molinet from Thena.ai on how they built an inbox feature using Knock to simplify support
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Getting started with in-app messaging
An introduction to in-app messaging strategy, message types, and best practices.
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Introducing Partials
Reuse pieces of content and code across any of your notification templates.
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Kinesis consumer balancing
How we balanced Kinesis consumers across our Kubernetes pods to improve platform performance and resilience.
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What to look for in a notification template management system
A guide to creating reusable and composable notification content using a template management system.
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Building customer-facing webhooks with Next.js
An in-depth guide that covers best practices when building customer-facing webhooks and how to build a webhook dashboard with Next.js and Knock.
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Announcing Knock Mobile
The complete toolkit to power notifications for mobile applications.
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Using Slack ephemeral messages in product notifications
An in-depth guide that covers the various ways to use Slack ephemeral messages in product notifications
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Adding real-time toast notifications in Nuxt and Vue
An in-depth guide that covers adding real-time toast notifications using Nuxt, Vue.js, shadcn/vue and Knock's feed API
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How to build an in-app notification feed with Nuxt and Vue
An in-depth guide that covers building a real-time activity feed using Nuxt, shadcn/ui, and Knock
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How to render tables in Slack markdown
A quick guide that covers a few ways to create table layouts in Slack markdown
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Creating interactive Slack apps with Bolt and Node.js
An in-depth guide that covers building an interactive Slack app with the Bolt framework and Node.js
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Adding real-time toast notifications in Next.js
An in-depth guide that covers adding real-time toast notifications using Next.js, shadcn/ui and Knock's feed API
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Building a Notion-style activity feed with Next.js and shadcn/ui
An in-depth guide that covers building a real-time activity feed using Next.js, shadcn/ui, and Knock
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Introducing: Mobile SDKs for Swift, Kotlin, Flutter, and React Native
Today we are releasing v1.0 of our Mobile SDKs for Swift, Kotlin, Flutter, and React Native.
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Building a GitHub activity feed with Node.js and Socket.io
An in-depth guide that covers building a real-time activity feed using Node.js, Socket.io and GitHub webhooks.
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How push notifications work on Apple and Android
An overview of how push notifications work on Apple and Android operating systems.
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The benefits of adding an activity feed to your B2B product
This post covers some of the benefits of adding activity feeds to B2B SaaS products
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Hacking our PostgreSQL driver to get more out of Amazon RDS performance insights
How one small modification to the Elixir Postgrex library let us force AWS monitoring to enumerate database query performance on a per-transaction basis.
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Getting started with SlackKit
A step-by-step guide to creating a Slack app with SlackKit and Next.js
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Announcing SlackKit: The easiest way to build a Slack integration
Today we're excited to announce SlackKit. A set of Embeddable UIs and APIs that make it simple to integrate your product with Slack.
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How Vidyard rebuilt their notification system with Knock to drive product-led growth and ship faster
As the Vidyard team started to focus on product-led growth in 2023, they realized that their existing in-house notification infrastructure was slowing them down and preventing them from accomplishing their goals—so they turned to Knock.
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Our $12M Series A
We raised $12M from Craft Ventures to bring powerful notification infrastructure to developers everywhere.
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How to model Slack webhook connections in Knock
A step-by-step guide to modeling Slack webhook connections in Knock.
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How Webflow shipped in-product marketing notifications while reducing technical debt
The Growth Engineering team at Webflow wanted to be able to say yes more often to product and marketing teams who wanted to introduce new messaging, so they implemented Knock.
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Taking a deep dive into Slack's Block Kit
A deep dive into Slack's Block Kit with examples on building static and interactive notifications for your Slack app.
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Announcing commit diffs
Today we’re excited to announce a big upgrade to the version control experience in Knock. Introducing commit diffs.
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How EdApp doubled course completion rates with Knock
Dave and Taylor at EdApp detail the challenges they faced with their original setup, their decision to choose Knock over other tools, and how they were able to double course completion rates and boost engagement with Knock
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How to authenticate users with Slack using OAuth
A step-by-step guide to using OAuth with Slack to authenticate users in a Node.js application.
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2023: A letter to the Knock community
2023 was a good year for us at Knock. In this letter we’ll review what we shipped in 2023 and what you can expect from us in the coming year.
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How to send in-app notifications with Next.js
A step-by-step guide to sending in-app feed notifications with Next.js using the app directory and React Server Components
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Zero downtime Postgres upgrades
How we upgraded from Postgres 11.9 to 15.3 with zero downtime
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Open sourcing our documentation
We're pleased to announce that our Knock docs are now open source and available on our GitHub.
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How to send browser push notifications from a Node.js app
A deep dive into how to send browser push notifications using express and node-pushnotifications.
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The developer's guide to Slack's Markdown formatting
A mrkdwn guide for people that write Markdown.
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The top real-time notification services for building in-app notifications
We take a deep-dive into the top real-time services for building in-app notification experiences.
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The five principles of modern developer tools
A deep dive into how modern developer tools bring typing, CI/CD integration, and version control to engineering teams where they work.
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Announcing: in-app feed notifications design kit 2.0
Announcing a new version of our in-app feed notifications design kit, including mobile designs, component controls, and an update to everything from 1.0.
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Why you need observability in notification systems
Notifications are a critical bridge between your product and your users. Learn why you need to add observability into your notification system.
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Announcing: Knock workflow builder 2.0
Announcing a complete rebuild of our Knock workflow canvas, including support for multi-branch messaging workflows.
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How we built our data warehouse connector using Prequel
A deep dive on how and why we built our data warehouse connector using Prequel, a data warehouse connector as a service.
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How to go from single-channel to multi-channel notifications
An in-depth guide on how to go from single-channel to multi-channel notifications.
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Video walkthrough: power Knock with Segment events
A step-by-step guide to setting up Knock as a Segment destination, connecting an event to a workflow, and testing event-driven workflows.
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How we built our workflow throttles using Redis Streams
A deep dive into how we built our throttle function with Redis Streams.
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Launch week recap
Here’s everything we shipped during our first ever launch week.
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Announcing the Subscriptions API
Today we’re announcing our new Subscriptions API. With subscriptions you can store and notify lists of recipients, and map those lists back to resources in your application.
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Announcing the Knock webhook channel
Announcing a new, flexible channel type to use in your notification workflows. Introducing the Knock webhook channel.
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Announcing the Schedules API
A flexible, declarative way to build recurring notifications, without having to manage cron jobs in your own codebase.
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Announcing the Knock CLI and management API
Today we’re thrilled to announce a new way for building, testing, and deploying your Knock notification infrastructure, all in code. Introducing the Knock CLI and management API.
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Announcing the HTTP source in Knock
Announcing a universal connector for bringing data into Knock. Use any event streaming platform to orchestrate your cross-channel notifications.
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Using our One and Done library to power idempotent API requests
A look at idempotent requests, why they are important, and how to use our new One and Done library to implement them in your Elixir applications.
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Announcing Knock Translations
Translations let engineering and product teams manage notification localization at global scale without incurring high amounts of notification template debt along the way.
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Announcing our Segment extension and native link analytics
Manage open and link analytics in Knock and send normalized notification data to your analytics stack using Segment.
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The 7 best transactional email services for developers in 2023
We take a deep-dive into the top transactional email services available to developers today.
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Building a real-time commenting app with Socket.io and React
An in-depth guide that covers building a real-time commenting application using React, Socket.io and Node.js.
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Comparing marketing automation platforms and notification infrastructure
A guide on when to use marketing automation platforms for your transactional messaging and when its worth using a dedicated system for transactional notifications.
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Announcing our Datadog extension
Today we’re excited to announce that our Datadog extension is now generally available for all Knock customers.
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Announcing our HIPAA compliance
We're excited to announce that Knock is now HIPAA compliant. Learn more about how Knock enables providers in the healthcare space to power customer engagement with our platform.
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The developer's guide to notification system tooling in 2023
An in-depth look at notification systems and the ecosystem of tools, frameworks, and vendors available.
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Knock 2022: A year in review
Here's what happened at Knock this year, from new production customers to what we shipped to support them. Plus, a peek at what's coming in 2023.
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The product manager's guide to designing Slack notifications
A guide to understanding Slack's block kit UI framework and a few learnings for how to use it to build great Slack notifications.
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How we designed our user onboarding flow at Knock
In this post we cover how we designed our onboarding experience and share helpful tips for building a strong onboarding flow for self-service products.
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How to ORDER BY using the contents of a column in Postgres
How we solved a challenging customer request using Postgres.
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Implementing SSO using WorkOS
How Knock used WorkOS to implement SAML 2.0 SSO quickly and efficiently in our Elixir codebase.
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Implementing a usage-based billing system: integration deep dive (part 2)
A closer look at implementation details in building a usage-based billing system powered by Orb.
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Announcing Knock Sources
Power your product notifications with data from your customer data platforms (CDPs), such as Segment or RudderStack, or reverse ETL platforms, such as Hightouch, Census, or Polytomic.
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Announcing our GDPR certification
We're excited to announce that Knock is now GDPR certified. You can learn more in our updated privacy policy.
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Six findings we rely on when managing PostgreSQL indexes
A look into how we evaluate which indexes to use and when to maximize query efficiency.
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Evaluating usage-based billing providers: what engineers need to know (part 1)
A look into our experience in buying and integrating a usage-based billing provider at Knock.
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How we built webhooks in Knock
A deep dive into how we built our webhooks feature using the underlying Knock notification engine and a few learnings along the way.
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The five stages of the notification lifecycle
How leading product teams build and maintain notifications that delight users and drive outcomes.
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Build vs buy: a guide for notification systems
A complete guide for what to consider if you're evaluating whether to build your own notification system or use a third-party vendor.
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How we onboard engineers at a devtools startup
A behind-the-scenes look at how we onboard new engineers at Knock, and the principles we use to do so.
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An introduction to in-app notifications and why your product needs them
We take a deep look into different types of in-app notifications (such as feeds, inboxes, and toasts), why they're valuable for your product, and what you need to build them.
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Controlling Elixir supervisors at runtime with feature flags
A look at how Knock uses Elixir and feature flags to adapt our software at runtime.
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Building a batched notification engine
A deep dive on how to design and build a batched system for your product notifications.
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Software Engineering Daily: Notifications Infrastructure with Chris Bell
Our CTO, Chris Bell, was recently interviewed on the popular Software Engineering Daily podcast where he discussed all things Knock.
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Announcing Knock
Today we're thrilled to announce the public launch of Knock's product notifications infrastructure for developers.
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VendorPM powers faster marketplace response times and drives gross merchandise volume with Knock
How VendorPM used Knock to gain visibility into their notification system and double the response rate in their marketplace.
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Standard Metrics drives investor-founder collaboration and increases report compliance with Knock
How Standard Metrics used Knock's in-app feed to enable investor-founder collaboration and increase report compliance.
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How we use Postgres LTrees to surface API logs
Postgres ships with the Label Tree data type. How Knock uses LTrees for fast API log search.
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Announcing our SOC 2 Type 2 certification
We're thrilled to announce that we have achieved a SOC 2 Type 2 certification after recently completing our audit period.
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How to design great keyboard shortcuts
How to save time for your users by choosing memorable, conflict-free keyboard shortcuts.
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How we work: moving fast to ship customer value
A peek behind the curtain at Knock. How we work to optimize for shipping customer value, quickly.
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Using the Knock notification component to add an in-app feed to your product
A look into how to set up and use Knock's in-app feed component.
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The three notifications you need to drive basic authentication
The role that notifications play in signup and login flows.
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The three notifications you need to drive product-led growth
The role that notifications play in growth loops and a few real examples you can use in your own product.
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Using Knock to power Knock's notifications
Getting meta and showing the power of Knock to build our member invite feature.
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Why notifications matter
On why we started Knock.