HookBytes vs RelayKit

HookBytes provides webhook infrastructure as a managed cloud service or an open-source self-hosted gateway. It creates dynamic endpoints with HMAC authentication and custom routing rules, then delivers events asynchronously with exponential backoff and a dead letter queue for failed deliveries. Users can search, filter, inspect, and replay events through the dashboard or CLI. Stored payloads include event history and metadata such as headers and delivery status. The Open Source plan is a self-hosted Laravel gateway with full source access, an MIT license, community support, and unlimited webhooks at free. Cloud Starter costs $29 a month for up to 100K webhooks monthly, standard support, a 99.9% uptime SLA, email and Slack alerts, API rate limiting, and real-time monitoring. Enterprise has custom pricing, unlimited webhooks, a 99.99% uptime SLA, multi-region deployments, dedicated support, on-premise options, and custom integrations. HookBytes is available through API, self-hosted, and web platforms.

RelayKit is a cloud service and API for receiving, inspecting, verifying, storing, and forwarding webhook events from third-party services. One incoming event can be delivered to multiple destinations in parallel, with each destination tracked and retried independently. Failed deliveries receive automatic retries of up to 20 attempts, and users can replay events manually. Inbound signature verification supports Stripe, GitHub, Shopify, Twilio, SendGrid, Paddle, Clerk, and Resend. Security controls include IPv4 and IPv6 IP allowlisting, configurable rate limits, and audit records for rejected requests. RelayKit says it forwards the original request body and headers, except for specified hop-by-hop headers. The @relaykit/cli can send webhooks to a local development server and requires Node.js 18 or later. Hobby costs nothing for 1,000 webhooks monthly. Pro costs $9 a month for 100,000 webhooks, and Team costs $29 a month for 500,000. Team adds Schema Sentinel, Time Machine replay, and priority support.