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.
Trusted by companies worldwide
These teams chose Hook0 over competitors because Hook0 publishes its full server source (SSPL-1.0) and also offers production-ready SaaS support. They gain a competitive advantage by embracing extensibility, reversibility, and future-proofness in their integration strategies.
Set up webhooks in 10 minutes
From signup to production in three steps
Register & Configure
Create an account, add your application, and list the event types your subscribers can receive.
Getting started guideSend Events via API
POST your event once. Hook0 delivers it, retries on failure, signs the payload, and encrypts over TLS.
Authentication docsMonitor & Debug
See every delivery attempt, inspect payloads, find out why a delivery failed, and replay events from the dashboard or API.
Monitoring guideOut-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, SDKs, and MCP Server for AI assistants make it easy to trigger webhook events from your application and let your users connect to every available SaaS.
Signed & Encrypted
All webhooks are TLS secured and contain a cryptographic signature to prevent forgery, replay, man-in-the-middle attacks.
Configurable Retries
Two-phase retry schedules configurable per subscription: fast retries with increasing delays, then slow retries at fixed intervals. Smart defaults included, full control when you need it.
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.
All-in-one platform
Build a state-of-the-art webhooks solution in minutes using Hook0
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 all retry attempts we still can't reach a webhook endpoint, 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
Hook0 won't miss the events you send it.
GDPR Compliant
Hook0 is 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 Enterprise Scale
Hook0 automatically scales to handle thousands of requests per minute.
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!
We are building it the way we would love to use it
This is by far the best webhook software out there
Hook0 is a game-changer for developers who need a reliable webhook solution. One simple API call handles everything: deliverability, retries, and security. Reliable, efficient, and worth a solid 5/5.
Thank you for all of your help, we appreciate your partnership.
Thank you very much for the explanation, we were confused on the cause and now it is very clear. Thank you so much!
The project looks great, and I love the concept of using webhooks.
You have better things to build
Stop building webhook infrastructure. Start shipping features. Get started in minutes.
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.
Real-time notifications
When something happens on your system, let your users know immediately!
No Code Solutions
Integrate with platforms like Zapier and Integromat and offer your users webhooks without any code.
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.
Stop Polling
We all know polling for data is inefficient. Use webhooks instead to push data to your users.
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.
No More Custom Reporting
Have your users subscribe to your webhooks and give them a self serve integration.
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.
Asynchronous Notifications
For time consuming tasks, use webhooks to asynchronously notify your users when they are done.
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.
Internal Systems Communication
An event bus solution can be heavy, start with internal webhooks to communicate between internal services.
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.
Platform Notifications
Giving your platform users access to events occuring on your platform improves the experience for everyone.
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.
Back Office Operations
Let your subscribers know an order has been refunded or shipment has been delivered so they can take action.
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.
Provide Updates On Progress
As data in your system changes, update your subscribers with those changes.
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.
API & Docs
Built by open-source developers around the world for everyone to use
One API, Full Control
Hook0 is built by open-source developers around the world for everyone to use.
Developer Resources
A fully documented set of resources to help guide you through your integration
Developer ResourcesMCP Server for AI Assistants
Control your webhooks using natural language with Claude, Cursor, Windsurf, or any MCP-compatible AI
Setup MCP Server# 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_type": "order.completed",
"payload": "{\"order_id\":\"12345\",\"amount\":99.99}",
"payload_content_type": "application/json",
"occurred_at": "2025-01-15T10:30:00Z",
"labels": {}
}'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.
What's included
- Fully managed, no infra. to own
- 1 developer
- 1 application
- 10 event types
- 10 subscriptions
- Up to 100 events/day
- Extra events are blocked
- 7 days data retention
- Community support
- No credit card required
Startup
Enhance your webhook experience with our new features and grow your start-up!
What's included
- Fully managed, no infra. to own
- 25 developers
- 1 application
- 50 event types
- 300 subscriptions
- Up to 30,000 events/day
- Then €0.003/event (never blocked)
- 14 days data retention
- Email support (3-day response)
Pro
Unleash your data connectivity along with enterprise features and better support.
€1,824/yr excl. VAT (20% off)
What's included
- Fully managed, no infra. to own
- Unlimited developers
- Unlimited applications
- Unlimited event types
- Unlimited subscriptions
- Up to 100,000 events/day
- Then €0.0001/event (never blocked)
- 30 days data retention
- Priority email support (3-day response)
- 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.
What's included
- Fully managed, no infra. to own
- Unlimited everything
- Custom events per day
- Custom data retention
- Custom SLA & dedicated support
- Enterprise security & compliance
- Static source IPs (on demand)
On-Premise
Your dedicated Hook0 instance
Self-hosted
Open-source, on your infrastructure. Complete control over your data. Security and privacy compliant.
What's included
- Host your own instance
- Your data, your rules
- Server Side Public License
- Community support on Discord
What's not included
- Infrastructure scaling
- 99.9% uptime
- Managed updates
Pro
We deploy a dedicated Hook0 instance to your environment and help you maintain/update it.
Or €0 setup + €6,000/yr excl. VAT
What's included
- Your data, your rules
- Up to 1,000,000 events/day
- Compatible with most cloud providers
- Managed updates
- Priority email support (3-day response)
Enterprise
We help you exactly the way you need to provide a great webhook experience to your users.
What's included
- Your data, your rules
- Custom SLA & dedicated support
- Custom events per day
- Study of your use cases
- Custom developments
- Training
What are Webhooks as a Service?
How long does it take to integrate with Hook0?
How is this different than Zapier, Make or n8n?
We've already built webhooks, can we still use Hook0?
Have more questions? Check out our product FAQ or contact us.