Domain Rating by Ahrefs, checked 3 Oct 2026, changed 3 Oct 2026.
What it does
Hook0 is an open-source webhooks-as-a-service platform that handles webhook delivery, retries, HMAC signatures, and monitoring. Available free or on paid plans starting at €59/month, or self-hosted.
Questions people ask
What happens if I exceed my daily event limit?
On the free Developer plan, extra events are blocked (HTTP 429). On paid plans (Startup and Pro), extra events are never blocked and are billed at a per-event rate (€0.003/event on Startup, €0.0001/event on Pro).
Is Hook0 free?
Yes. Hook0 has a free Developer tier that includes 100 webhook events per day, HMAC signatures, and delivery monitoring with no credit card required. Hook0 is also open-source and self-hostable under SSPL-1.0 if you need data sovereignty.
Can I self-host Hook0 for free?
Yes. Hook0's server is fully open-source under the SSPL-1.0 license. You can self-host it with Docker Compose or Kubernetes. When self-hosting, you manage your own infrastructure, scaling, updates, and monitoring.
Hook0 has a free listing. The owner can unlock the full profile for $5:
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Link metrics
Majestic link data for hook0.com. Arrows show the change since the previous check (up, down or no change).
Metric
Value
Change
Trust Flow
26
● no change since last check
Citation Flow
33
● no change since last check
Referring domains
325
● no change since last check
External backlinks
781
● no change since last check
Top topic: Computers/Open Source (26). Checked 3 Oct 2026, changed 3 Oct 2026. Link data by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.