Company
Introducing data sources
Connect events from any service to your Knock messaging infrastructure in a few clicks, no code required.
Blog
The latest resources and news about messaging infrastructure.
Categories
Company
Introducing email API benchmarks
A free, live resource powered by billions of API requests to help you compare email providers on real-world performance data.
Company
Introducing data functions
Today we're thrilled to introduce Knock data functions, a new set of workflow steps that enable you to write data back to Knock from within a workflow run.
Guides
18 examples of effective SaaS newsletters in 2026
We break down 18 real newsletter examples from leading SaaS companies, highlighting the specific elements that make each one effective.
Company
Introducing the AI agent function
Run prompts on AI models directly in your workflows to gather context, enrich data, and personalize messaging.
Product
Email design systems: a technical guide for growth teams
An email design system is the technical architecture and governance model that lets you scale email production across teams while maintaining brand consistency and code quality.
Guides
The top 10 customer data platforms (CDPs) in 2026
We take a deep-dive into the top customer data platforms (CDPs) available to engineering teams today.
Customers
How Medium turned notifications from an engineering bottleneck into a growth engine
Learn how Medium reduced the engineering effort required to introduce new notifications, allowing the marketing team and product leads to experiment with new tactics and channels.
Guides
How to build dynamic onboarding emails based on product usage
Learn how to build a dynamic onboarding series that adapts to user behavior, with a step-by-step guide using Knock workflows.
Company
Our 2025 letter to the Knock community
As we close 2025 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.
Customers
How Nellis Auction doubled engagement while boosting cost efficiency
Learn how Nellis Auction uses Knock to manage and send user-centric notifications in an auction-based marketplace.
Guides
The top 9 customer engagement platforms in 2026
We take a deep-dive into the top customer engagement platforms available today.
Engineering
Top 9 React notification libraries in 2026
In this article, we'll explore the nine best open-source notification libraries for React applications in 2026, categorized by their primary use cases and strengths.
Guides
18 SaaS in-app messaging examples to improve engagement in 2026
We highlight 18 real in-app messaging examples from leading SaaS companies in 2026, revealing the specific elements that drive engagement.
Guides
The 11 best transactional email services for developers in 2026
We take a deep-dive into the top transactional email services available to developers today.
Guides
The ultimate guide to markdown
Learn everything you need to know about Markdown, from basic syntax to advanced features. This comprehensive guide includes interactive examples you can edit and preview in real-time.
Guides
Top 11 SMS providers for developers in 2026
We take a deep-dive into the top SMS providers available to developers in 2026.
Guides
The top 5 real-time notification services for building in-app notifications in 2026
We take a deep-dive into the top real-time services for building in-app notification experiences.
Product
Push notifications vs. in-app messaging: making the right choice for your product
Push notifications and in-app messaging are two of the most powerful channels for communicating with users. Understanding when and how to use them can transform your product's communication strategy.
Guides
The top 9 in-app messaging tools in 2026
We take a deep-dive into the top in-app messaging tools available today.
Engineering
The developer's guide to notification system tooling in 2026
An in-depth look at notification systems and the ecosystem of tools, frameworks, and vendors available.
Guides
How to collect NPS scores and trigger G2 review requests with Knock
We’ll break down how we used Knock to build an NPS survey review automation loop, including an in-app NPS survey that triggers a G2 review request email.
Guides
16 examples of effective SaaS welcome emails in 2026
We highlight 16 real welcome email examples from leading SaaS companies in 2026, revealing the specific elements that drive engagement.
Guides
Why password reset emails fail and how to fix them
Password reset emails sometimes fail to reach users. Learn the 7 most common causes of missing transactional emails and how to fix them.
Guides
The top 6 push notification providers in 2026
An in-depth look at the top 6 push notification providers in 2026 to power native device notifications.
Guides
The 5 best link tracking tools for developers in 2026
We take a deep-dive into the top link tracking tools available to developers today.
Guides
How to automate usage-based upgrade nudges with Knock + Orb
Discover how to automate usage-based upgrade nudges with Knock and Orb, triggering timely alerts when customers near their limits.
Guides
The 5 best notification infrastructure platforms for developers in 2026
We take a deep-dive into the top notification infrastructure platforms available to developers today.
Guides
The 5 best usage-based billing solutions for developers in 2026
We take a deep-dive into the top usage-based billing solutions available to developers today.
Company
Introducing Guides 1.0
Today we releasing Guides 1.0. Power in-app messaging with your own components.
Customers
Building the future of in-app messaging with Webflow
How Webflow's feedback informed the development of Knock Guides, a component-first approach to in-app messaging.
Product
Marketing automation vs. notification infrastructure: a complete comparison guide (2026)
A guide on when to use marketing automation platforms for your transactional messaging and when its worth using a dedicated system for transactional notifications.
Guides
The ultimate guide to writing effective notifications
In this guide, we'll cover best practices and guidelines for writing effective notification messaging across any channel.
Engineering
Twilio Notify EOL: Migrating to Knock
How to transition your Twilio Notify implementation to Knock
Guides
Chrome's new web push spam detection: What developers need to know
We take a deep-dive into the top in-app messaging tools available today.
Engineering
How to add an in-app notification feed to Next.js
A high level tutorial on how to get started with Knock's drop-in notification feed components and Next.js
Company
Launch week recap
A recap of our launch week, where we introduced the Agent Toolkit + MCP server, guides, broadcasts, and more.
Company
Introducing guides
Today we're thrilled to introduce guides, a set of tools you can use to power in-product messaging, everything from paywalls and badges, to one-time announcements and banners, using your own components.
Company
Introducing docs 2.0 and new SDKs
Today we're announcing two significant upgrades to the Knock developer experience: our new docs site and new SDKs for Node, Python, Go, Java, and Ruby.
Company
Introducing broadcasts
Today we're thrilled to introduce Knock broadcasts, a new way to send one-time messages to your users across any channel in Knock.
Company
Announcing workflows 3.0
Today we're excited to introduce Knock workflows 3.0. We redesigned our template editor and our workflow canvas with a renewed focus on speed, ease of use, and craft.
Company
Introducing Agent Toolkit and MCP server
Today we're thrilled to introduce Knock Agent Toolkit, a set of tools you can use to build AI agents that communicate across channels with your users, within the guardrails of the content you've designed in Knock.
Engineering
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.
Engineering
How we think about writing for robots with llms.txt
A deep dive into how we built our llms.txt file for our docs.
Product
Why you should personalize your notifications with Reverse ETL
Use reverse ETL to create data-driven notifications that can increase engagement within your product.
Product
The product manager's guide to collaboration notifications
How to send delightful collaboration notifications and accelerate the engagement loops in your product.
Product
Notification template management that scales
How to write future-proof requirements for a template management system that can grow with your notifications.
Customers
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.
Engineering
Building effective component libraries: a startup perspective on design systems
How we approach building and maintaining our component library at Knock
Guides
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.
Product
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.
Guides
The top 6 alternatives to Braze Content Cards
In this post, we take a deep dive into the top 6 alternatives to Braze Content Cards.
Guides
Marketplace notifications with Knock and Next.js
A guide to creating marketplace notifications patterns in Knock.
Product
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.
Company
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.
Product
How to grow a marketplace with in-app messaging
Learn how two-sided marketplaces increase engagement and sales with in-app notification experiences.
Product
How to free your engineers from notification support tickets
Learn the benefits of giving customer teams access to notification logs.
Guides
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
Product
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.
Product
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.
Company
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.
Customers
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.
Company
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.
Customers
How Discogs powers its global music marketplace with Knock
Discogs replaced the notification system within their monolithic application with Knock.
Customers
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.
Customers
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
Guides
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
Product
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
Product
Getting started with in-app messaging
An introduction to in-app messaging strategy, message types, and best practices.
Company
Introducing Partials
Reuse pieces of content and code across any of your notification templates.
Engineering
Kinesis consumer balancing
How we balanced Kinesis consumers across our Kubernetes pods to improve platform performance and resilience.
Guides
What to look for in a notification template management system
A guide to creating reusable and composable notification content using a template management system.
Guides
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.
Company
Announcing Knock Mobile
The complete toolkit to power notifications for mobile applications.
Guides
Using Slack ephemeral messages in product notifications
An in-depth guide that covers the various ways to use Slack ephemeral messages in product notifications
Guides
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
Engineering
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
Engineering
How to render tables in Slack markdown
A quick guide that covers a few ways to create table layouts in Slack markdown
Guides
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
Guides
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
Engineering
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
Company
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.
Guides
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.
Engineering
How push notifications work on Apple and Android
An overview of how push notifications work on Apple and Android operating systems.
Engineering
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
Engineering
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.
Engineering
Getting started with SlackKit
A step-by-step guide to creating a Slack app with SlackKit and Next.js
Company
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.
Customers
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.
Company
Our $12M Series A
We raised $12M from Craft Ventures to bring powerful notification infrastructure to developers everywhere.
Engineering
How to model Slack webhook connections in Knock
A step-by-step guide to modeling Slack webhook connections in Knock.
Customers
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.
Engineering
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.
Company
Announcing commit diffs
Today we’re excited to announce a big upgrade to the version control experience in Knock. Introducing commit diffs.
Customers
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
Engineering
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.
Company
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.
Engineering
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
Engineering
Zero downtime Postgres upgrades
How we upgraded from Postgres 11.9 to 15.3 with zero downtime
Product
Open sourcing our documentation
We're pleased to announce that our Knock docs are now open source and available on our GitHub.
Product
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.
Guides
The developer's guide to Slack's Markdown formatting
A mrkdwn guide for people that write Markdown.
Engineering
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.
Company
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.
Engineering
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.
Company
Announcing: Knock workflow builder 2.0
Announcing a complete rebuild of our Knock workflow canvas, including support for multi-branch messaging workflows.
Engineering
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.
Guides
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.
Product
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.
Engineering
How we built our workflow throttles using Redis Streams
A deep dive into how we built our throttle function with Redis Streams.
Company
Launch week recap
Here’s everything we shipped during our first ever launch week.
Company
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.
Company
Announcing the Knock webhook channel
Announcing a new, flexible channel type to use in your notification workflows. Introducing the Knock webhook channel.
Company
Announcing the Schedules API
A flexible, declarative way to build recurring notifications, without having to manage cron jobs in your own codebase.
Company
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.
Company
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.
Engineering
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.
Company
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.
Company
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.
Guides
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.
Company
Announcing our Datadog extension
Today we’re excited to announce that our Datadog extension is now generally available for all Knock customers.
Company
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.
Company
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.
Product
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.
Product
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.
Engineering
How to ORDER BY using the contents of a column in Postgres
How we solved a challenging customer request using Postgres.
Engineering
Implementing SSO using WorkOS
How Knock used WorkOS to implement SAML 2.0 SSO quickly and efficiently in our Elixir codebase.
Engineering
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.
Company
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.
Company
Announcing our GDPR certification
We're excited to announce that Knock is now GDPR certified. You can learn more in our updated privacy policy.
Engineering
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.
Engineering
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.
Engineering
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.
Product
The five stages of the notification lifecycle
How leading product teams build and maintain notifications that delight users and drive outcomes.
Product
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.
Engineering
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.
Product
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.
Engineering
Controlling Elixir supervisors at runtime with feature flags
A look at how Knock uses Elixir and feature flags to adapt our software at runtime.
Engineering
Building a batched notification engine
A deep dive on how to design and build a batched system for your product notifications.
Company
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.
Company
Announcing Knock
Today we're thrilled to announce the public launch of Knock's product notifications infrastructure for developers.
Customers
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.
Customers
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.
Engineering
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.
Company
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.
Product
How to design great keyboard shortcuts
How to save time for your users by choosing memorable, conflict-free keyboard shortcuts.
Product
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.
Engineering
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.
Product
The three notifications you need to drive basic authentication
The role that notifications play in signup and login flows.
Product
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.
Engineering
Using Knock to power Knock's notifications
Getting meta and showing the power of Knock to build our member invite feature.
Company
Why notifications matter
On why we started Knock.