Knock: Agent-Led Customer Engagement Workflows

You didn’t hire your engineering team to build notification infrastructure. But here you are—a sprint or two deep into what started as a simple send a welcome email request, now staring at a growing tangle of custom delivery logic, retry handling, per-channel quirks, user preference management, and template versioning that nobody owns and everyone’s afraid to touch.

It’s a familiar bind. Notification systems are table stakes for any modern SaaS product, but they’re also genuinely hard to get right at scale. Multi-channel delivery—email, SMS (short message service), push, in-app, chat—each comes with its own providers, SDKs (software development kits), failure modes, and compliance considerations. Add product, marketing, and transactional messaging to the same codebase, and you’ve built yourself a second job.

The marketing team wants to iterate on messaging copy. The product team needs behavioral triggers wired to new features. Your customer success team can’t diagnose why a notification failed without a ticket being filed. Meanwhile, engineers are context-switching between actual product work and notification plumbing—and none of it compounds into a competitive advantage.

Knock

Knock is a customer engagement platform (CEP) built specifically around notification infrastructure—designed to give engineering teams a production-grade foundation for multi-channel messaging while making that system accessible to non-technical collaborators across the business.

The platform covers the full messaging stack: product, marketing, and transactional notifications in a single system, with the developer tooling, AI-assisted workflow building, and enterprise reliability that teams at Vercel, Webflow, Amplitude, and Clay depend on in production.

Built for the Teams Shipping the Product

Knock addresses the core tension that makes notification infrastructure painful: engineers need control and reliability, while marketing and product teams need speed and autonomy. The platform resolves that by cleanly separating concerns—developers wire up the infrastructure once using Knock’s APIs and SDKs, and non-technical teammates can then edit copy, adjust targeting, and build new messaging flows without opening a pull request.

The AI-native workflow builder lets teams describe a messaging journey in plain language and automatically generate the corresponding workflow, including branching logic and delays. That same system connects to your data warehouse, CDP (customer data platform), reverse ETL pipelines, and webhooks, so triggers reflect real user behavior rather than approximations.

Preference centers give end users control over when and how they’re contacted, which reduces unsubscribes and helps maintain healthy delivery rates. And because Knock is built specifically for developer workflows, it integrates directly with Cursor and Claude Code via MCP (model context protocol), so you can manage your entire notification system without leaving your AI code editor.

For teams running in regulated environments, Knock maintains HIPAA, SOC 2, GDPR (General Data Protection Regulation), and CCPA (California Consumer Privacy Act) compliance and publishes a 99.99% uptime SLA (service level agreement)—a meaningful guarantee for a downstream provider that touches every user touchpoint in your product.

What’s in the Platform

Knock covers the full range of messaging infrastructure needs. Key capabilities include:

• Agents: AI-driven agents can research user attributes and dynamically adapt message content—for example, routing different onboarding emails to managers versus individual contributors based on role data.
• Broadcasts: Send one-time campaigns or announcements to segmented audiences across any supported channel without needing a separate marketing tool.
• CI/CD Integration: Validate workflow changes before they reach production using Knock’s CI/CD (continuous integration/continuous delivery) pipeline support, reducing the risk of breaking live notification flows.
• Data Activation: Ingest real-time data from your product, warehouse, CDP, or webhooks and trigger workflows based on any user attribute, event, or segment change.
• Guides: Contextual in-app messaging components (paywalls, dialogs, nudges) powered by your own UI components, with targeting and copy editable by non-engineers directly in Knock.
• Infrastructure as Code: Manage Knock configuration through version control, the Knock CLI (command line interface), and environment-based deployment workflows, keeping messaging infrastructure in sync with your broader engineering practices.
• Knock MCP: Connect Knock to AI-powered development environments like Cursor or Claude Code with a single command, making notification management a native part of your AI-assisted development workflow.
• Observability and Analytics: Debug notification delivery end-to-end from the Knock dashboard, stream logs to external tooling, and give customer-facing teams visibility into message history without requiring engineering involvement.
• Preferences: User-level preference centers let your customers control which notifications they receive and on which channels, with send windows that respect user time zones and availability.
• SDKs: Native SDKs available in Node, Python, Ruby, Go, Java, .NET, Elixir, and PHP, with in-app notification components delivered via React SDK.
• Template Management: Build and manage email templates with AI assistance—generating client-safe, on-brand email layouts without writing HTML—and version templates alongside your other workflow logic.
• Version Control: Stage and test workflow changes in isolated environments and roll back to a prior version with a single click if something goes wrong in production.
• Workflows: Build complex, multi-step messaging journeys including batching, delays, multi-channel routing, and conditional branching using a visual builder or by prompting the AI agent directly.

The level of visibility Knock provides into our notification system was a game-changer. Our customer service team can now easily access the entire history of a notification, from the initial template to the final delivered message.

Troy Blakely, Engineering Lead, Discogs

Taken together, Knock functions as a complete notification operating system—one that engineering teams can trust at scale, marketing and product teams can operate independently, and business stakeholders can audit without having to file a support ticket.

Stop Rebuilding Notification Infrastructure on Every New Feature

The cost of rolling your own notification system isn’t just the initial build—it’s every subsequent sprint spent maintaining it, debugging edge cases, and fielding requests from teams who need something changed but can’t touch the code. Knock eliminates that overhead by providing a production-grade infrastructure layer that handles delivery, observability, compliance, and cross-channel orchestration out of the box.

If your team is spending engineering cycles on plumbing that doesn’t differentiate your product, Knock is worth a close look.

Frequently Asked Questions