Best Self-Hosted Notification Infrastructure in 2026

Self-hosted and open source tools for delivering transactional email, SMS, push, and in-app notifications via API, replacing SaaS platforms like Knock, Courier, and OneSignal.

The top-rated pick is Notifkit with 35 GitHub stars.

1 self-hosted notification infrastructure — ranked by GitHub stars.Browse all

Notifkit

Open source notification infrastructure you self-host — one API for email, SMS, push, and webhooks with fallbacks, quiet hours, retries, and logs.

Alternative to:

Knock

Why self-host?

Self-hosting puts you in control. You own your data, avoid vendor lock-in, and eliminate recurring subscription costs. For teams handling sensitive data or operating under strict compliance requirements, running your own infrastructure is often the only viable option.