Knock

Product and Customer Messaging Infrastructure

Freemium

Description

Knock offers a comprehensive infrastructure solution designed for sending product and customer messages effectively. It enables developers to implement sophisticated cross-channel notification systems, encompassing email, push notifications, and in-app messages, aimed at enhancing user engagement, growth, and retention. The platform provides robust tools for managing the entire notification lifecycle, simplifying development and deployment.

Featuring a stateful notification engine, Knock allows the creation of thoughtful workflows that respect user attention while ensuring timely communication. It centralizes template and preference management, giving end-users control over their notification settings. With SDKs for major languages, a management API, CI/CD integration, and observability features, Knock is built for seamless integration into development workflows and production environments, supporting scalability and reliability with features like version control and isolated environments.

Key Features

Stateful Notification Engine: Build complex, multi-step notification workflows.
Cross-Channel Delivery: Send notifications via email, push, Slack, SMS, in-app feeds, and more.
Template Management: Centralize and manage notification templates with versioning and partials support.
Preference Management: Allow users to customize their notification settings across channels and categories.
In-app Component Library & SDKs: Easily embed notification feeds and toasts natively into applications.
Developer Tooling: Includes SDKs (Node, Python, Ruby, Go), API, CLI, environment management, CI/CD integration, and version control.
Cross-Channel Analytics: Track notification performance and stream data to analytics tools.
Observability: Stream logs and metrics to monitoring tools like Datadog.
Batching & Scheduling: Group notifications or schedule them for later delivery.
Multi-Tenancy Support: Manage notifications, branding, and preferences on a per-customer basis (Enterprise).

Use Cases

Implementing product onboarding sequences via multiple channels.
Sending transactional notifications (e.g., password resets, order confirmations).
Notifying users about new features or updates relevant to them.
Delivering real-time alerts for mentions, comments, or project updates.
Managing user notification preferences centrally.
Analyzing notification engagement to optimize messaging strategies.
Building scalable notification systems for growing applications.

Frequently Asked Questions

What counts as a notification sent for usage billing purposes?

A notification sent is a single notification delivered to a single user on a single channel. For example, triggering a workflow that sends both an in-app message and an email to one user counts as two notifications sent.

What happens if I go over the free plan limit?

Notifications are not hard-capped. Knock will contact you to ensure a billing method is in place for the next month if you exceed the limit.

Do you offer volume discounts?

Yes, volume discounts are available on the Enterprise plan. Contact sales for details.

What is a channel in Knock?

A channel represents a single destination for notifications, such as a SendGrid account for emails, a Slack channel for a bot, or a Knock in-app channel for a feed or toast messages.

If I use Knock, do I still pay for downstream messaging services like Twilio?

Yes, you are still responsible for billing with downstream providers that deliver your notifications.