Axel vs Webhooker

Axel captures third-party webhooks, routes them to data systems or HTTP services, and replays retained events. It stores an accepted event’s original payload before returning HTTP 202, then delivers it asynchronously. Declarative filters and field transformations can route one event to several destinations. Listed destinations include Postgres, MongoDB, S3, Cloudflare R2, Databricks, BigQuery, and signed HTTP webhooks; generic webhook and custom HMAC sources are also supported. The dashboard and CLI can replay retained events, while Axel Cloud provides 30 days of searchable event and delivery history. Data Contracts infer event and field types and check for schema changes every five minutes, but do not block delivery or guarantee destination acceptance. Delivery is at least once with a stable event ID across retries, so signed receivers should deduplicate. The Free plan includes 10,000 accepted inbound events monthly and community support. Pro costs $20 a month, with additional accepted events at 0.015 USD per 1,000; unused credit expires monthly. Axel is web, API, and self-hosted.

Webhooker is an inbound webhook gateway that verifies, stores, and delivers events to your services. It accepts HTTP POST webhooks from providers including Stripe, GitHub, and Shopify, and can check each source using HMAC-SHA256 or SHA1 signatures; invalid signatures receive HTTP 401. For each destination, it makes six delivery attempts over about five hours, with failed events available for resending from a dead letter queue. You can transform payloads per destination, inject headers, and sign outbound requests. A live SSE event stream, delivery history, replay, and in-app or email failure alerts help track processing. Delivery is at least once, so your receiving services should account for duplicates. The cloud service says ingest, storage, and delivery run on Hetzner servers in Germany, with backups in EU data centers. Plans retain events for 14, 30, or 90 days, depending on plan; the data processing agreement is available on paid plans. The Free plan is free, and Pro is €29 a month. Webhooker also offers a CLI for Linux, macOS, and Windows and a Management API for dashboard operations over HTTP.