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Hook0 vs Outpost: catalog facts
Hook0	Outpost
Freemium Free hosted plan with no credit card required, plus paid plans.	Free Free and open source to self-host.
Web, Self-hosted	Self-hosted
Handles retries and HMAC signing of outgoing webhooks Hosted in the EU with a free plan	Self-hostable alternative to building webhook delivery yourself Kubernetes Helm chart and example configs included
SSPL licence is source-available, not open source Aimed at developers adding webhooks to their own product	Aimed at developers running a service, not individual users Requires operating your own infrastructure
Self-hosted, Hosted service	Self-hosted
Closed source	Open source
License: SSPL-1.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.