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smee.io vs Webhook Relay: catalog facts
smee.io	Webhook Relay
Free Free to use.	Freemium Free plan with 150 webhooks a month; paid plans for higher volume.
Web, Command line	Web, Command line
No need to open ports or run a tunnel Built-in support in Probot GitHub Apps	Delivers webhooks to localhost and private networks Durable retries during outages
Needs the smee client running locally to forward events Intended for development, not production traffic	Hosted service that requires an account Free plan limited to 150 webhooks a month
Web application, Hosted service	Downloadable app, Hosted service
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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