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Activepieces is an automation platform for building and running workflows that connect apps, APIs, and internal systems. It combines a no-code builder with developer-friendly extensibility, including a TypeScript “pieces” framework and AI-oriented capabilities.

Key Features

• Visual workflow builder with branching, loops, and retries
• Webhook triggers and a generic HTTP step for integrating any REST API
• Code steps with JavaScript and support for installing npm packages
• Extensible “pieces” integration framework written in TypeScript
• Flow versioning and the ability to restore previous versions
• Templates, branding options, and controls over which integrations appear in the builder
• Built-in interfaces for human input/approval patterns (for example, forms or chat-style inputs)
• AI features to assist with code generation and AI-first automation patterns, including MCP-focused tooling

Use Cases

• Automate business processes across teams (sales, finance, HR, marketing)
• Build reliable API-driven workflows for internal tools using webhooks and HTTP requests
• Create custom integrations as reusable “pieces” and standardize automations across an organization

Activepieces is a strong fit for teams that want a Zapier-style automation experience with the flexibility to build and maintain custom integrations in TypeScript, while also supporting AI-assisted automation workflows.

Hook0 is an open-source Webhooks-as-a-Service (WaaS) platform that lets your application deliver webhook events to your users through a single API call. It provides a backend service plus a web dashboard to manage subscriptions, delivery, and debugging.

Key Features

• JSON REST API to publish events and manage webhook resources
• Fine-grained webhook subscriptions so users can choose which event types to receive
• Automatic request retries when endpoints are unreachable
• Event scoping to control which events are delivered to which subscribers
• Persistence of events and webhook delivery responses for auditing and debugging
• Modern web dashboard designed for self-serve, non-technical users

Use Cases

• Add webhook capabilities to a SaaS product without building a full delivery system
• Replace polling with real-time push updates to external customers or internal services
• Asynchronous notifications for long-running jobs (e.g., processing pipelines)

Limitations and Considerations

• Licensed under SSPLv1, which restricts offering Hook0 as a managed service to others

Hook0 is a practical choice for teams that want robust webhook delivery, retries, and observability packaged into a single platform. It helps standardize webhook management while keeping event delivery reliable and debuggable as your product scales.