Svix

Svix is an enterprise-ready webhook service for sending events to customer endpoints reliably and securely. It provides a webhook API and delivery infrastructure so you can implement webhooks without building retries, security, and observability from scratch.

Key Features

• Webhook message ingestion and dispatch with retry handling and deliverability features
• Webhook signature verification support (symmetric and asymmetric signing schemes)
• Endpoint and application management for multi-tenant webhook delivery
• Optional Redis-backed queuing and caching for higher throughput and resiliency
• PostgreSQL-backed persistence for events and operational data
• Security-focused controls such as blocking internal IP dispatch by default (SSRF mitigation)
• OpenTelemetry support for exporting traces to common observability stacks
• Official client libraries across multiple languages for API usage and webhook verification

Use Cases

• Add a production-grade webhook system to a SaaS product with minimal custom infrastructure
• Deliver event notifications to customer systems with robust retries and signing
• Centralize webhook operations (testing, debugging, and monitoring) across multiple services

Limitations and Considerations

• Requires PostgreSQL; Redis is optional but recommended for queueing at scale
• Internal network delivery is restricted by default and requires explicit subnet allowlisting when needed

Svix is a strong fit for teams that need a secure, scalable webhook platform with a clean API and operational tooling. It helps standardize webhook best practices while reducing the effort and risk of building webhook delivery in-house.