Hookbridge vs RelayKit

Hookbridge is a cloud service for software teams that send webhooks to customer endpoints, receive third-party webhooks or hold incoming events for workers to retrieve through an API. Its send API queues a message and returns an ID, so delivery continues outside the application's request path. Outbound retries use exponential backoff and jitter according to a configured schedule for retryable failures. Retained messages can be replayed from the console or API after successful or failed delivery. Security options include outbound HMAC-SHA256 signatures and inbound checks using configured HMAC signatures, static tokens or IP allowlists. Hookbridge says it encrypts data in transit and uses access controls and monitoring; payload and delivery-log retention depends on plan and customer settings, with automatic purging after the configured window. Developers can use an HTTP API and SDK examples for Node.js, Python, Go, Ruby and PHP. Tools include a CLI tunnel, a GitHub Action for CI testing and an account-free browser request inspector.

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.