# Cascadehook vs Mailly: which to pick

> Cascadehook vs Mailly: pricing, platforms, launches, upvotes and makers side by side on ProductsFarm, with notes on which to pick.

Canonical: https://productsfarm.com/compare/cascadehook-vs-mailly
Last updated: 2026-11-05

|  | [Cascadehook](https://productsfarm.com/product/cascadehook) | [Mailly](https://productsfarm.com/product/mailly) |
| --- | --- | --- |
| What it is | Outbound webhook delivery with signing, retries and delivery logs for developers | Two-way email inboxes for AI agents and applications, with a review step for you |
| Pricing | Free | Freemium |
| Platforms | API, Web | Web, API, CLI |
| Categories | Developer tools, Productivity, Communication | Developer tools, Communication, AI |
| Made for | Backend developers, SaaS teams, and indie founders building customer-facing webhooks | developers, support teams, product teams |
| Built with | [Next.js](https://productsfarm.com/tech-stack/nextjs), [React](https://productsfarm.com/tech-stack/react), [TypeScript](https://productsfarm.com/tech-stack/typescript), [Go](https://productsfarm.com/tech-stack/go), [Cloudflare](https://productsfarm.com/tech-stack/cloudflare), [PostgreSQL](https://productsfarm.com/tech-stack/postgresql), [Clerk](https://productsfarm.com/tech-stack/clerk), [Resend](https://productsfarm.com/tech-stack/resend), [Tailwind CSS](https://productsfarm.com/tech-stack/tailwind-css) | [Cloudflare](https://productsfarm.com/tech-stack/cloudflare), [Tailwind CSS](https://productsfarm.com/tech-stack/tailwind-css) |
| Upvotes | 0 | 0 |
| Website | [cascadehook.com](https://cascadehook.com/) | [mailly.site](https://mailly.site/) |

## About Cascadehook

Cascadehook is a service for sending webhook events from your product to your customers' endpoints without building the delivery infrastructure yourself. Your application publishes an event through an API call with a project API key, and Cascadehook delivers it to every endpoint subscribed to that event type.

Each outgoing webhook is signed with HMAC, so the receiving system can verify that the request came from you before it parses the body. When an endpoint responds with a temporary failure, such as a timeout or a retryable error, Cascadehook reschedules the delivery automatically with backoff and jitter, and it respects Retry-After headers when they are sent. Every attempt is recorded with its status and duration, so you can inspect what happened and replay a delivery once the endpoint is ready.

The product suits development teams that need to notify customers or internal systems of events such as invoice payments, and that would rather not maintain their own queues, retry logic, signing and delivery logs. An Idempotency-Key header can be supplied with each event request, and the site includes a quickstart and a receiver guide for connecting an endpoint.

## About Mailly

Mailly is a two-way email service for AI agents and applications. Each inbox gets an address on mailly.site, or a custom domain on a paid plan, and incoming messages, outgoing messages and replies are kept together in one conversation thread. An agent can read the full thread, and a hosted agent can prepare reply drafts that you edit and approve before anything is sent.

The product can be connected through a remote MCP endpoint, an HTTP API, a CLI or SMTP. Inbound mail can be delivered to your own receiver with signed webhooks that are retried on failure. Campaigns handle audience outreach from synced contacts and static or dynamic lists, and Workflows handle lifecycle messages triggered by events, with wait steps. Delivery, bounce, complaint and unsubscribe events are recorded so you can inspect what happened to each message.

Mailly is aimed at developers and teams who want an agent or application to handle email without losing human oversight. Hosted agents currently draft only, so sending from an agent requires your own application to call the API or CLI and apply its own send controls.

## Related

- [Cascadehook](https://productsfarm.com/product/cascadehook)
- [Mailly](https://productsfarm.com/product/mailly)
- [More comparisons](https://productsfarm.com/compare)