Knock
Push notification software
Transactional email software
Proactive notification software
Communication platform as a Service (cPaaS) platforms
Notification infrastructure software
- Features
- Ease of use
- Ease of management
- Quality of support
- Affordability
- Market presence
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$250 per month
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What is Knock
Knock is a notification infrastructure platform that helps product and engineering teams design, orchestrate, and deliver notifications across channels such as email, push, SMS, and in-app feeds. It provides APIs and a workflow-based model to manage notification logic, templates, routing, and user preferences in a centralized system. Knock is typically used by SaaS and consumer applications that need consistent, event-driven messaging without building and maintaining a full in-house notification stack. It differentiates by focusing on developer-first primitives (APIs, SDKs, webhooks) and a unified layer for cross-channel notification management.
Developer-first APIs and SDKs
Knock centers on API-driven notification creation and delivery, which fits engineering-led teams that want notifications managed as part of their application architecture. It supports event-triggered patterns and programmatic control over recipients, payloads, and routing. This approach can reduce custom glue code compared with assembling separate point tools for each channel. It also aligns well with CI/CD workflows where notification changes are versioned and tested.
Cross-channel orchestration layer
Knock provides a single place to coordinate notifications across multiple channels rather than treating email, push, and in-app as separate systems. Teams can standardize templates, variables, and delivery rules across channels to keep user messaging consistent. Centralized orchestration helps when products need fallback logic (for example, try in-app then email) and channel-specific formatting. This is particularly useful for transactional and product notifications that must stay synchronized.
Preference and routing controls
Knock includes mechanisms to manage user notification preferences and routing decisions as part of the notification workflow. This supports common requirements such as opt-in/opt-out handling, per-channel preferences, and role-based targeting. Centralizing these controls can simplify compliance and reduce duplicated preference logic across services. It also helps product teams iterate on notification rules without rewriting multiple downstream integrations.
Not a full marketing suite
Knock is oriented toward transactional and product notifications rather than end-to-end marketing automation. Organizations looking for built-in campaign management, audience segmentation, and lifecycle marketing features may need additional tools. This can increase overall stack complexity for teams that want both marketing and transactional messaging in one platform. Fit depends on whether the primary need is notification infrastructure versus marketing engagement.
Integration and setup effort
Adopting Knock typically requires engineering work to instrument events, map user identities, and integrate delivery providers for each channel. Teams must also design workflows, templates, and preference models that match their product requirements. Compared with simpler point solutions, initial implementation can take longer. The platform is best suited to teams that can allocate developer time for integration and ongoing governance.
Channel delivery depends on providers
As an orchestration layer, Knock commonly relies on third-party delivery services (for example, email or SMS providers) for actual message transport. Delivery performance, regional coverage, and pricing can therefore vary based on the chosen downstream providers. This can introduce additional vendor management and monitoring requirements. Some organizations may prefer a single vendor that bundles delivery and orchestration under one contract.
Plan & Pricing
| Plan | Price | Key features & notes |
|---|---|---|
| Developer | $0 per month | Up to 10,000 messages/month; 500 guide active users; Unlimited notification workflows, broadcasts, delivery channels, and team members; Batch & delay notifications; Built-in multi-tenancy; SSO via Google. |
| Starter | $250 per month | 50,000 messages included; 2,500 guide active users included; Prepaid usage then $0.005 per additional message; $0.05 per additional guide active user; Remove Knock branding; Everything in Developer. |
| Enterprise | Contact sales (custom pricing) | Flexible volume-based pricing or monthly notified-user pricing; Per-customer branding & preferences; i18n support; Send analytics to warehouse; Datadog observability; SCIM; Enterprise SLAs; Shared Slack channel & priority support; SAML 2.0 SSO; HIPAA compliance / BAA. |
Seller details
Knock Labs, Inc.
Private
https://knock.app/
https://x.com/knocklabs
https://www.linkedin.com/company/knocklabs/
