Vellum was founded with the mission to streamline and enhance the development of AI-driven applications, particularly those utilizing large language models (LLMs). The company offers a comprehensive AI product development platform that focuses on improving prompt engineering and deployment processes. Their services include tools for comparing prompts, models, and LLM providers, curating test cases, and quantitatively evaluating prompt outputs using industry-standard metrics. Vellum also provides a simple API interface for model deployment, back-testing, version control, and observability features to ensure reliable production iterations.

Notable investors backing Vellum include Y Combinator, Rebel Fund, Eastlink Capital, and influential founders from companies like HubSpot, Reddit, Dropbox, Cruise, and Instacart. The platform has achieved significant milestones by enabling developers to take LLM-powered features from prototype to production efficiently. Vellum's impact lies in its ability to empower prompt engineers with advanced tools and foster trust in AI systems through robust evaluation and monitoring capabilities.