#1
Svix is an open-source webhook service that handles event ingestion, signing, retries, and endpoint management with scalable delivery and client libraries.
3.4k stars273 forksMITlast commit Actively maintained
4 self-hosted Knock alternatives
Knock is a notification infrastructure platform for building, orchestrating, and sending product and transactional messages across email, SMS, push, in-app and Slack. It provides APIs/SDKs, templates, user preference management, routing/flows, and delivery analytics/debugging.
Alternatives to Knock
Developer-focused platform for automated, omnichannel messaging (email, SMS, push, WhatsApp) with low-code journeys, segmentation, templates, and self-hosting.
2.9k stars380 forksMITlast commit Actively maintained
#3
Hook0 is an open-source Webhooks-as-a-Service platform to send events via a single API call with subscriptions, retries, persistence, and monitoring.
1.5k stars103 forkslast commit Actively maintained
#4
Open-source multi-channel notification service with REST API, management UI, templates and channel abstraction for email, web, push and SMS; built with ASP.NET Core and React.
878 stars83 forksMITlast commit Actively maintained
What replacing Knock actually involves
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 4 of 4 shipped a commit in the last six months. Licences in this list: MIT. In exchange you take on hosting, backups and updates yourself.
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