Vellum Freemium

Vellum — Build and Evaluate Reliable LLM Applications

Vellum is a development platform for building, evaluating, and deploying reliable LLM applications. It brings together prompt management, testing, and observability so teams can move AI features from experiment to production with confidence.

Whether you are building a chatbot, an AI agent, or an internal assistant, Vellum provides the tooling to iterate quickly, measure quality, and roll out changes safely. Its structured workflows help technical and non-technical teams collaborate on AI products.

Product Features

  • Prompt management: Version, organize, and share prompts.
  • LLM playground: Compare models and prompts side by side.
  • Evaluation: Build test cases and measure output quality.
  • Workflows: Design multi-step AI logic with a visual builder.
  • Deployment: Ship models with API and SDK support.
  • Observability: Monitor usage, cost, and performance.

Product Highlights

  • Streamlines the full LLM app development lifecycle.
  • Makes testing and evaluation a core part of the workflow.
  • Enables collaboration between engineers and domain experts.
  • Supports production-ready deployment and monitoring.

Use Cases

  • Building customer support chatbots.
  • Creating AI assistants for internal knowledge.
  • Developing AI agents that use tools and APIs.
  • Benchmarking and selecting the best LLM for a task.
  • Shipping LLM features with rigorous testing.