100% Bootstrapped Hook0 is Open-Source

Webhooks As A Service

Hook0 is an Open-Source Webhooks-as-a-service (WaaS) that makes it easy for developers to send webhooks. Developers make one API call, and Hook0 takes care of deliverability, retries, security, and more.

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Free Plan
No Credit Card
Hosted in Europe
GDPR Compliant
Hook0 on Product Hunt
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Social Proof

Trusted by the most innovative teams

These teams chose Hook0 over competitors because Hook0 is the only fully open-source project that also offers production-ready SaaS support. They gain a competitive advantage by embracing extensibility, reversibility, and future-proofness in their integration strategies.

Join them today
Adobe
AT&T
IBM
Zoom
TUI
LinkedIn
99.9%
Uptime SLA
10M+
Webhooks Delivered
<100ms
Avg. Delivery Time
500+
Companies Trust Us
Features

Out-Of-The-Box Webhooks

Everything you need to build a state-of-the-art webhooks solution in minutes

Open-Source

Unlike alternatives, Hook0 is fully open-source. No vendor-locking, we are here to stay, no investors, we are fully sustainable since day 1.

Easy Integration

Our JSON REST API and SDKs make it easy to trigger webhook events from your application and let your users connect to every available SaaS.

Enterprise Level Security

All webhooks are TLS secured and contain a cryptographic signature to prevent forgery, replay, man-in-the-middle attacks.

Smart Retries

Managing webhook retries is a pain. Our exponential back offs, endpoint monitoring and notifications handle it for you.

Make Your Subscribers Happy

Give your users a primo experience with our mock payloads, webhook logs and subscriber portal.

Transparent Webhooks

All webhook attempts are logged so you and your subscribers can easily search, debug and replay old events.

Embeddable Portal

Give your subscribers a branded experience with a custom subdomain and your logo uploaded on the subscriber portal.

Precise Dispatch

Your users only receive webhooks they subscribed to. You can filter each subscription by business info (user ID, …).

Data & Sovereignty

Hook0 does not lock your data nor your software. If you subscribe to Hook0 SaaS version, all your data will stay in Europe. No GAFAM there.

Complete Solution

All-in-one platform

Build a state-of-the-art webhooks solution in minutes using Hook0

Explore all features

Fine-grained subscriptions

Enable your users to subscribe to your events by setting up a webhook. They can choose which event types they want to receive.

Multi subscriptions

Your users can register several webhook target URLs, we will send events to all of them!

Event scoping

Scope events to one or several levels of your application. Users, organizations, administrators, [insert your own], they can all handle subscriptions to their events.

Dashboards (Coming soon)

Either use Hook0 out-of-the-box dashboards to let your users see events that went through their subscriptions, or build your own with the API.

Failure notification (Coming soon)

If after several retries we still can't successfuly reach a webhook, your subscriber is notified by email.

Events & responses persistence

Hook0 keeps track of every event your application sent it and of every webhook call. This can help you debug your integration or act as an audit log!

High availability (Coming soon)

Hook0 won't miss the events you send it.

GDPR Compliant

Hook0 is fully GDPR compliant and can easily execute a data processor agreement with your company if needed.

Data Security

Hook0 utilizes best practices for data storage and encryption. We also offer single-tenant and on-premise deployment options.

Designed for Enteprise Scale

Hook0 robust architecture automatically scales to handle thousands of requests per minute.

Testimonials

What people are saying

Hear from developers and teams who trust Hook0 for their webhook infrastructure

Give it enough time and open-Source always wins in the end!

François-Guillaume Ribreau
François-Guillaume Ribreau
Hook0 co-founder

We are building it the way we would love to use it

David Sferruzza
David Sferruzza, PhD
Hook0 co-founder

This is by far the best webhook software out there

Kieron Wiltshire
Kieron Wiltshire
Senior Software Engineer

Ready to supercharge your webhooks?

Join hundreds of teams who trust Hook0 for reliable, secure webhook delivery. Get started in minutes.

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About Hook0

What is Hook0?

At Hook0, we are an independent European company founded on principles of software sustainability and ethical data practices. Our code is fully open-source.

We firmly believe in transparency and data sovereignty. Unlike other solutions, Hook0 does not lock your data or software. If you choose the SaaS version of Hook0, all your data will remain in Europe, ensuring compliance with local regulations.

Our business model is entirely supported by revenue from our paying users, with no venture capital funding. Since our launch, we have served our clients with dedication, focusing on quality and reliability.

100%
Revenue from paying users
$0
In venture capital
5 years
In service
Read our longevity statement
Use Cases

Real-time notifications

When something happens on your system, let your users know immediately!

Get Started

No Code Solutions

Integrate with platforms like Zapier and Integromat and offer your users webhooks without any code.

Perfect for: E-commerce, Marketing Automation, CRM Integration

How it works: Hook0 seamlessly connects with 3000+ apps through Zapier. Simply configure your webhook endpoint and let your users automate their workflows.

View integration guide

Stop Polling

We all know polling for data is inefficient. Use webhooks instead to push data to your users.

Perfect for: Real-time Apps, IoT Platforms, Data Sync Services

How it works: Replace inefficient polling with instant push notifications. Reduce API calls by up to 90% and get real-time data delivery.

Learn about webhooks

No More Custom Reporting

Have your users subscribe to your webhooks and give them a self serve integration.

Perfect for: SaaS Platforms, Analytics Tools, Business Intelligence

How it works: Let your customers build their own integrations. They subscribe to events they care about and receive data in their preferred format.

See self-service examples

Asynchronous Notifications

For time consuming tasks, use webhooks to asynchronously notify your users when they are done.

Perfect for: Video Processing, Data Pipelines, ML/AI Workloads

How it works: Start long-running jobs and get notified when they complete. No need to keep connections open or poll for status.

Async webhook patterns

Internal Systems Communication

An event bus solution can be heavy, start with internal webhooks to communicate between internal services.

Perfect for: Microservices, Event-Driven Architecture, Internal APIs

How it works: Use webhooks as a lightweight alternative to message queues. Perfect for decoupling services without infrastructure overhead.

Internal webhooks guide

Platform Notifications

Giving your platform users access to events occuring on your platform improves the experience for everyone.

Perfect for: Marketplaces, Social Platforms, Developer Tools

How it works: Empower your users to react to platform events in real-time. From new orders to user signups, keep everyone in sync.

Platform events setup

Back Office Operations

Let your subscribers know an order has been refunded or shipment has been delivered so they can take action.

Perfect for: E-commerce, Logistics, Order Management

How it works: Automate back-office workflows. Trigger actions on refunds, shipments, inventory changes, and more.

E-commerce webhooks

Provide Updates On Progress

As data in your system changes, update your subscribers with those changes.

Perfect for: Project Management, CRM Systems, Collaboration Tools

How it works: Keep all stakeholders informed as data evolves. From status updates to milestone completions, deliver real-time progress notifications.

Progress notifications
Developer Experience

API & Developer Resources

Built by open-source developers around the world for everyone to use

Built By Developers For Developers

Hook0 is built by open-source developers around the world for everyone to use.

Robust API Documentation

Fully documented RESTful JSON API with examples

Read the Docs

Developer Resources

A fully documented set of resources to help guide you through your integration

Developer Resources
send-webhook.sh 
# Send a webhook event
curl -X POST \
  https://app.hook0.com/api/v1/event \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "application_id": "$APPLICATION_ID",
    "event_id": "550e8400-e29b-41d4-a716-446655440000",
    "event_type": "order.completed",
    "payload": "{\"order_id\":\"12345\",\"amount\":99.99}",
    "payload_content_type": "application/json",
    "occurred_at": "2025-01-15T10:30:00Z",
    "labels": {}
  }'
REST
API
JSON
Format
99.9%
Uptime
Pricing

Hook0 Pricing

Choose the plan that's right for you, and start sending webhooks now

Cloud

Hook0 as a service, managed by our team

Developer

Perfect way to try out Hook0, no need to setup your instance, free forever for side-projects.

FREE Forever
Sign Up

What's included

  • Fully managed, no infra. to own
  • 1 developer
  • 1 application
  • 10 event types
  • 10 subscriptions
  • Up to 100 events/day
  • 7 days data retention
  • No credit card required

Startup

Enhance your webhook experience with our new features and grow your start-up!

€59 /month
Subscribe

What's included

  • Fully managed, no infra. to own
  • 25 developers
  • 1 application
  • 50 event types
  • 300 subscriptions
  • Up to 30,000 events/day
  • 14 days data retention
  • Standard support (3-day email)
Most Popular

Pro

Unleash your data connectivity along with enterprise features and better support.

€190 /month

€1824/year (20% off)

Subscribe

What's included

  • Fully managed, no infra. to own
  • Unlimited developers
  • Unlimited applications
  • Unlimited event types
  • Unlimited subscriptions
  • Up to 100,000 events/day
  • 30 days data retention
  • Premium support (3-day email)
  • Static source IPs (on demand)

Enterprise

You need more? You need different? Let us know and we will build a custom plan just for you.

Custom /year
Contact us

What's included

  • Fully managed, no infra. to own
  • Unlimited everything
  • Custom events per day
  • Custom data retention
  • Custom support level
  • Enterprise security & compliance
  • Static source IPs (on demand)
One event can trigger multiple webhook subscriptions which can in turn be retried multiple times. Subscriptions and retries are free.

On-Premise

Your dedicated Hook0 instance

Self-hosted

Open-source, on your infrastructure. Complete control over your data. Security and privacy compliant.

FREE Forever
Get installation instructions

What's included

What's not included

  • Infrastructure scaling
  • 99.9% uptime
  • Managed updates
Recommended

Pro

We deploy a dedicated Hook0 instance to your environment and help you maintain/update it.

€1000 setup + €500/month

Or €0 setup + €6000/year

Subscribe

What's included

  • Your data, your rules
  • Up to 1,000,000 events/day
  • Compatible with most cloud providers
  • Managed updates
  • Premium support (3-day email)

Enterprise

We help you exactly the way you need to provide a great webhook experience to your users.

Custom
Contact us

What's included

  • Your data, your rules
  • Custom support level
  • Custom events per day
  • Study of your use cases
  • Custom developments
  • Training
FAQ

Frequently asked questions

Can't find the answer you're looking for? Reach out to our customer support team.

What are Webhooks as a Service?
We took everything that goes into a webhook service (retries, fine-grained subscriptions management, etc) and packaged it up into a platform that you can easily integrate with using our API.
How long does it take to integrate with Hook0?
Every setup is different, but a senior developer should be able to build out a working version within a day and be live in under a week.
How is this different than Zapier, Make or n8n?
These services are automation tools that help connect online services together. Hook0 is a platform that gives your application the ability to send webhook events to your users (who may use these services).
We've already built webhooks, can we still use Hook0?
That is a great use case for using Hook0 since you've already validated that your users want webhooks. There is a good chance that what Hook0 offers is much more robust than your solution. If that is the case, then migrating your custom solution to Hook0 will allow you to focus on other priorities while offering a top notch webhook solution.

Have more questions? Check out our product FAQ or contact us.