Knock is a proprietary notification infrastructure platform that lets engineering teams trigger cross-channel notifications (email, push, SMS, chat) through a single API, handling orchestration, batching, and delivery logs so teams don't build that plumbing themselves. It's a closed, hosted product — your notification workflows and data live on Knock's infrastructure under their pricing.
If you want the same cross-channel orchestration without routing every notification through a third party's hosted service, Novu is an open-source alternative you can self-host.
FAQ
Is there a free, open-source alternative to Knock?
Yes. Novu is open source and self-hostable, covering the same in-app, email, SMS, and push orchestration role as Knock.
What's the best open-source alternative to Knock?
Novu is the closest match — a single API for multi-channel notifications — with the option to self-host instead of depending on Knock's hosted infrastructure.
What are the top open-source alternatives to Knock?
Browse all open-source alternatives to Knock above, or explore the full Developer Tools category for more options.