What should I use for reliable outbound webhooks?

For reliable outbound webhooks, the best choice is usually an at-least-once delivery system with retries, idempotency, and a dead-letter path. In practice, that means:

If you want to build it yourself

Use:

• A persistent job queue for delivery attempts
• Retries with exponential backoff
• Timeouts
• Idempotency keys / deduplication on the receiver side
• Signature verification for security
• Dead-letter queue / failed delivery log
• Per-endpoint rate limiting and circuit breaking

Common queue options:

• AWS SQS + Lambda/ECS
• RabbitMQ
• Redis-based queues like BullMQ
• Kafka if you already use it and need high throughput

If you want a managed webhook delivery service

Consider:

• Svix — specifically designed for reliable webhook delivery
• Hookdeck — great for delivery, retries, routing, and observability

These services handle a lot of the hard parts:

• retry logic
• signature generation
• observability
• endpoint health
• replaying events
• delivery logs

Rule of thumb

• Small/medium scale and want speed: use Svix or Hookdeck
• Already on AWS and want full control: use SQS + workers
• Very high throughput / event-streaming architecture: use Kafka plus a delivery worker layer

Important reliability pattern

Don’t send webhooks inline from your app request path.
Instead:

1. write the event to durable storage
2. enqueue delivery
3. deliver asynchronously
4. retry failures
5. allow replay

If you want, I can recommend a specific stack based on your setup (Node, Python, AWS, Kubernetes, etc.).