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About

Hook0 is an open source Webhooks-as-a-Service platform that helps developers send, receive, manage, and monitor webhooks at scale. It is built for teams that need to add webhook support to their product without spending weeks building retry logic, signatures, monitoring, queues, dead letter handling, event logs, and subscriber management from scratch. With one API call, teams can publish outbound events, while Hook0 handles delivery infrastructure, configurable retry logic, webhook calls, endpoint monitoring, event persistence, and developer tooling. It keeps track of every event an application sends and every webhook call it makes, helping teams debug integrations, inspect delivery attempts, and maintain an audit log. Hook0 supports secure webhook delivery with HMAC signatures, key rotation, TLS encryption, and compliance-focused deployment options. As a fully open source platform, it allows teams to audit the codebase and self-host on their own infrastructure.

About

Mailofly is a complete email infrastructure platform built for developers, SaaS companies, startups, and modern applications. Send and manage emails through a powerful REST API or SMTP without the complexity of building and maintaining your own email infrastructure. Mailofly supports transactional emails, marketing campaigns, email templates, delivery tracking, detailed logs, webhooks, inbound email routing, domain management, and audience management. Developers can easily integrate Mailofly into their applications and receive real-time delivery events through webhooks. With support for popular development environments and a developer-friendly workflow, Mailofly makes it simple to send, receive, monitor, and scale email from a single platform.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Developers and engineering teams that need reliable, open-source webhook infrastructure to send, monitor, and manage customer-facing events at scale

Audience

SaaS companies, startups, developers, development agencies, AI applications, e-commerce platforms, and businesses that need reliable transactional or marketing email infrastructure.

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Supported
Online Supported

API

Offers API Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

Pricing

€59 per month
Free Version Supported
Free Trial Not Supported

Pricing

$20/month
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

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Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 5.0 / 5
support 4.7 / 5

Pros & Cons from Real Users

Pros

  • * Easy-to-use dashboard with a clean and simple interface. * Smooth API integration, especially for developers. * Helpful email tracking and delivery logs. * Domain verification makes email setup more organized. * Multiple mailboxes available in one platform. * Makes it easier to monitor email activity and troubleshoot delivery issues. * Useful features without unnecessary complexity.
  • I use Mailofly while working on the product, mainly to test email sending and check delivery activity. The API is straightforward to work with, and I like being able to see email events in the dashboard when I need to troubleshoot something.
  • Supports both API and SMTP integration, giving developers flexibility when integrating email into their applications. Simplifies email integration for SaaS products, web applications, and backend services. Useful for transactional emails such as OTPs, password resets, account verification, and application notifications. Developer-friendly approach with SDK-based integration. Provides email delivery logs, tracking, webhook support, and bounce handling to help monitor email operations. Helps reduce the complexity of managing email infrastructure independently. Suitable for startups, SaaS companies, and development teams looking for centralized email management.

Cons

  • * Some features could be more intuitive for first-time users. * Initial domain configuration may require basic technical knowledge. * Occasional improvements in error messages would make troubleshooting easier.
  • It’s still a relatively new product. I’d like to see more integrations and a smoother experience in a few parts of the setup flow.
  • As a growing platform, it may have a smaller community and fewer third-party tutorials than more established email service providers. Developers migrating from another provider may need to update their existing integrations and test their email workflows . New users may need some initial setup time to configure DNS records and authenticate their sending domains.

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Hook0
Founded: 2021
France
www.hook0.com

Company Information

Mailofly
Founded: 2026
India
www.mailofly.com

Alternatives

FastHook

FastHook

FastHook.io

Alternatives

Sweego

Sweego

Mindbaz
SMTP.com

SMTP.com

Ziff Davis
Postmark

Postmark

ActiveCampaign

Categories

Webhook Supported

Categories

Email APIs Supported

Transactional Email Features

A/B Testing Supported
Contact Database Supported
Dynamic Content Supported
Email Monitoring Supported
Mailing List Management Supported
Reporting/Analytics Supported
Spam Check Supported
Template Management Supported

Integrations

Claude Supported
Cursor Supported
JSON Supported
Model Context Protocol (MCP) Supported
Supabase Not Supported
Windsurf Browser Supported
n8n Not Supported

Integrations

Claude Not Supported
Cursor Not Supported
JSON Not Supported
Model Context Protocol (MCP) Not Supported
Supabase Supported
Windsurf Browser Not Supported
n8n Supported
Claim Hook0 and update features and information
Claim Hook0 and update features and information
Claim Mailofly and update features and information
Claim Mailofly and update features and information