Alternatives / Knock

1 open-source alternative

1 Best Open Source Knock Alternatives in 2026

Looking for an open source Knock alternative? Only one project we verified fits: Novu, an open-source notification platform with a unified API and an embeddable inbox.

Maxime DERAME's profile

Written by Maxime DERAME

Last updated:

Best Knock alternatives at a glance

AlternativeBest forLicense
NovuUnified notification API with inboxMIT + enterprise license

How we chose these Knock alternatives

We looked for open-source notification infrastructure. We verified Novu's license, recent activity, stars, and self-hosting in its repository. See our methodology for the full criteria.

What Novu offers

Novu covers in-app, email, push, SMS, and chat with a unified API, a workflow engine, a digest engine, and a block-based email editor. The embeddable inbox for React, Next.js, and Remix has real-time delivery, preferences, and snooze. The cloud free tier includes 10,000 events per month.

Important: license and frontend

Novu is MIT with enterprise-licensed parts. The inbox component targets React apps, so other frontends need more work.

Maintenance status

Novu had commits within days of this update and has about 40,000 stars.

Why look for a Knock alternative?

Knock is a proprietary notification service priced by volume. Novu can be self-hosted, but some parts are under an enterprise license.

novu.co
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Novu

Open-source notification infrastructure.

Novu is an open-source platform for building in-app, email, push, SMS, and chat notifications, with a unified API, a workflow engine, and an embeddable inbox component, and it can be self-hosted or used in its cloud. Novu is a commercial open-source company: the core is MIT, and some directories are under a separate enterprise license. The free cloud tier is limited to 10,000 events per month.

40.2K4.5KMIT + enterprise licenseSelf-hosted

Pricing: Free to self-host; the cloud has a free tier and paid plans.

  • Unified API for many channels
  • Embeddable notification inbox
  • Large and active community
  • Some directories need an enterprise license
  • Self-hosting needs several services

Compare Knock alternatives

AlternativeTypeLicenseSelf-hostedBest for
NovuNotification platformMIT + enterprise licenseYesProduct notifications

Which one should you choose?

Want one API for in-app, email, push, and SMS

Novu has a workflow engine, digest engine, and React inbox.

Novu