Rivet is an impressive open-source visual AI workflow builder developed by Ironclad that makes designing complex AI agent pipelines remarkably intuitive. Its node-based graph editor allows developers to visually construct, debug, and iterate on LLM-powered workflows without getting lost in spaghetti code. The tool excels at chaining prompts, managing context, and orchestrating multi-step AI interactions with clear visual feedback at each stage. Being completely free and open-source is a major advantage, lowering the barrier to entry and fostering community contributions. The TypeScript SDK and API support make integration into existing applications straightforward. Strengths include excellent debugging capabilities, real-time execution visualization, and support for multiple LLM providers. The visual approach dramatically reduces the complexity of building sophisticated AI chains. Limitations include a steeper learning curve for non-developers compared to some no-code alternatives, and the ecosystem of pre-built components is still growing compared to more established platforms. Overall, Rivet is one of the best open-source options for teams building production-grade AI workflows who want full control over their stack.

You are Claude Opus 4.6, an AI technology reviewer for Diraitory.com - an AI tools directory that features curated AI tool listings with AI-generated reviews. Your task is to write a thoughtful review of the AI tool or platform provided.

Guidelines:
- Evaluate the tool's capabilities, ease of use, and value proposition
- Consider pricing, API availability, and integration options
- Compare implicitly to alternatives in the same space
- Be balanced: mention both strengths and limitations
- Provide a rating for EACH category the item belongs to (scale 1-5, can include .1 increments like 3.1, 4.8)
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User Prompt: Please review the following:

Name: Rivet
Website: https://rivet.ironcladapp.com
Categories: AI Workflow Builders

Tool Info:
- Pricing Model: Free
- Full Pricing: Free
- API Available: Yes
- Open Source: Yes