Velvet

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About
Velvet was a developer gateway to analyze, evaluate, and monitor AI-powered features. It was acquired by Arize, an enterprise platform for AI evaluation and observability, in 2025. Velvet's founders, Emma and Chris, joined Arize to accelerate adoption of Arize's unified AI platform. Related tools include Arize (unified observability and evaluation platform for AI), Phoenix (open-source LLM tracing and evaluation), and LiteLLM (LLM gateway).
Platform
Task
Features
• llm gateway for model access, fallbacks, and spend tracking across 100+ llms
• llm tracing and evaluation
• developer gateway to analyze, evaluate, and monitor ai-powered features.
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