Knock costs $15/mo.
These cost $0.
1 free alternatives to Knock, checked for license, recent activity and real adoption. Each one tells you the catch, so you can switch with your eyes open.
The top-rated free, open-source replacement for Knock is Novu (Open Source Open Source). Across this category, 1 self-hostable tool is available (including Novu). Switching a 5-person team saves up to $900/year compared to Knock's $15/mo subscription.
The catch: Requires self-hosting setup, updates, and server maintenance compared to managed Knock.
Knock vs Free Alternatives
Quick side-by-side comparison · $0/mo vs $15/mo
| Alternative | Type | License | Where It Runs | Stars | Head-to-Head |
|---|---|---|---|---|---|
| Novu | open source | Open Source | Self-host | ★ 40.3k | Knock vs Novu → |
The picks
1 open source · ranked by fit
- 01
Novu
open sourceOpen SourceSelf-host40.3knov 2026Open-source platform for building in-app, email, push, SMS, and chat notifications with a unified API, workflow engine, and embeddable inbox component.
The catch vs KnockRequires self-hosting setup, updates, and server maintenance compared to managed Knock.
Install, platforms & data +
- platforms
- webself-hosteddocker to self-host
- install
- Clone https://github.com/novuhq/novu or deploy with Docker Compose
- setup
- Deploy via Docker or binary release from GitHub and configure environment variables.
- your data
- All application data and configuration live on your own server or local database.
- checked
- 2026-11-07
Knock Head-to-Head Comparisons (2027)
Side-by-side trade-off breakdowns · 1 free alternatives
Frequently Asked Questions
Direct answers · Knock open-source replacements
What is the best free alternative to Knock?+
The top free alternative to Knock is Novu (open source, Open Source). Open-source platform for building in-app, email, push, SMS, and chat notifications with a unified API, workflow engine, and embeddable inbox component.
Can I self-host a free replacement for Knock?+
Yes. Of the 1 free alternatives to Knock, 1 can be self-hosted on your own server or local machine: Novu (Open Source).
How much does switching from Knock to a free alternative save?+
Knock starts at $15/month per seat ($180/year). Switching a 5-person team to a free alternative like Novu saves $900 per year in software subscription fees.
Should I vibe-code or build my own Knock clone from scratch?+
Our build verdict for Knock is NO (use a free alternative, save the tokens). Instead of paying recurring SaaS fees for Knock or rebuilding it from scratch, deploy one of the 1 battle-tested open-source alternatives like Novu.
What is the catch when switching from Knock to Novu?+
Requires self-hosting setup, updates, and server maintenance compared to managed Knock.
