Notification
infrastructure
for developers.

Knock is flexible, reliable notifications infrastructure that's built to scale with you. Use our APIs to engage users, power cross-channel workflows, and manage notification preferences.

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TRUSTED BY DEVELOPERS AT

Move fast

Ship product notifications in hours, not months

Move fast with a notification engine that’s ready to scale from your first welcome email to a cross-channel system that puts your customer first. With Knock, you get a team that’s dedicated to one thing and one thing only: your notifications.

All the channels, for now and later

Start with email and in-app channels. Instantly add push, SMS, and Slack when you need them.

Pay-as-you-go

Pay-as-you-go

Predictable pricing that scales with you. No upfront fees or infrastructure set up required.

Built for scale and resiliency

Built for scale and resiliency

Power high volume notifications without spending valuable engineering time on messaging infrastructure.

A complete set of notification primitives

Designed for flexibility

Knock handles even the most complex notifications use-cases, built on top of a series of primitives that make it easy to compose and create notification logic to power your product. Send fewer, higher relevancy notifications that respect the time and attention of your users.

Learn how Knock works
Browse workflow templates
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Your brand, our feed

A real-time notification inbox, out-of-the-box

Drop in our pre-built, real-time enabled components to complete your notification experience, backed by Knock’s powerful notifications infrastructure.

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notifications

Upgrade your notifications experience

Deliver a notifications experience that delights your customers. Knock helps you increase notification engagement by helping you reach your customers on the right channel, at the right time, with the right frequency.

Visibility for the whole team

Empower non-engineers to update your notifications logic and copy in minutes while giving developers time back to focus on your roadmap.

Secure and private by design

From day one we've built Knock to keep conversations between you and your customer as they should be: between you and your customer. Knock is SOC 2, Type II certified. Learn more.

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Features

Your toolkit for product notifications

Move fast with a notification engine that’s ready to scale from your first welcome email to a cross-channel system that puts your customer first. With Knock, you get a team that’s dedicated to one thing and one thing only: your notifications.

Versioning

Commit, reset, and audit your changes. Knock uses the same versioning workflow you do.

Environments

Test changes in a development environment before promoting them to production.

Observability

Look under the hood from API request to workflow run to downstream messages to understand how your users are receiving messages.

Branding

Customize colors, themes, and layouts to present a consistent brand across all of your notification surface areas.

Tenancy

Leverage our built-in tenancy model to support per-tenant feeds and to offer custom branding to your customers.

Testing

Easily test complex notification workflows across multiple channels, without needing to manually reproduce complex interactions in your product.


Built for developers

We obsess over the right abstractions so your team can focus on what matters.

Read our docs
  • A single, unified API for all of your
    notifications code
  • SDKs available in
    most major languages
  • Comprehensive documentation
    to help you get started
  • Powerful primitives to help
    you model your system

server.js

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const { Knock } = require("@knocklabs/node");
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const knock = new Knock(process.env.KNOCK_API_KEY);
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await knock.notify("new-comment-on-page", {
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  actor: comment.authorId,
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  recipients: usersToNotify.map(u => u.id),
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  data: {
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    commentId: comment.id,
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    commentText: comment.text,
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    pageId: comment.pageId
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  },
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  tenant: comment.tenantId,
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  cancellationKey: comment.id,
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});
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Don’t take our word for it

Read our case studies
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Ready to get started?

Check out our documentation and sign up for an account.

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