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Vellum AI vellum.ai
Research Team Data Active
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Summary AI development platform for designing, testing, deploying, evaluating and monitoring prompts, workflows, RAG pipelines, agents and production LLM applications.
Description Combines prompt management, workflow builder, deployments, online/offline evaluations, observability, release reviews, RAG and tool-calling/agent workflow support for production AI applications.
Positioning LLM workflow, evaluation, and deployment platform
HQ location San Francisco, CA, USA
Founded 2023
Funding stage Series A
Company type Private
Pricing model freemium, subscription
Last updated Jun 21, 2026
Revenue estimate Unknown
Valuation estimate Unknown
Investments $29.5M total; $20M Series A announced Jul 2025
Target customers AI product, engineering, operations and business teams building production LLM systems
Key competitors LangSmith, Humanloop, Galileo, Langfuse, Braintrust, PromptLayer
Known customers Unknown
Segments AI Workflows, AI Agents, AI Developer Tools, Knowledge & RAG, Document AI, LLM Deployment, AI Quality & Observability, AI Governance & Risk, Chatbots, Analytics & BI