# Vellum **Source:** https://geo.sig.ai/brands/vellum **Vertical:** Infrastructure **Subcategory:** Cloud Services **Tier:** Challenger **Website:** vellum.ai **Last Updated:** 2026-04-14 ## Summary LLM application development platform with prompt management, evaluation, and RAG workflows; structured AI feature development competing with LangSmith and Weights & Biases Prompts. ## Company Overview Vellum is an AI product development platform providing prompt management, model comparison, workflow orchestration, and production monitoring tools for engineering and product teams building LLM-powered applications — enabling teams to iterate on AI features with rigorous evaluation frameworks rather than ad-hoc prompt tweaking. Founded in 2023 by Andrew Kirima and Noa Flaherty in San Francisco, Vellum has raised approximately $12 million and targets AI-forward product teams at growth companies who need structured workflows for LLM feature development, testing, and deployment.\n\nVellum's platform covers the LLM application development lifecycle: Prompt Workshop for managing and versioning prompt templates with variable substitution, Evaluations for testing prompts against datasets to measure output quality before deployment, Document Index for building RAG (retrieval-augmented generation) pipelines with semantic search over enterprise documents, and Workflows for orchestrating multi-step AI pipelines with branching logic and human-in-the-loop review steps. The monitoring dashboard tracks production LLM performance, latency, and cost across models.\n\nIn 2025, Vellum competes in the rapidly growing LLM development tools market against LangSmith (LangChain's commercial platform), Weights & Biases Prompts, Helicone, Braintrust, and Humanloop for AI application observability and evaluation. The market has grown explosively as companies productionize LLM features and need rigorous quality control processes. Vellum's differentiation is its end-to-end workflow — from prompt development through evaluation to production monitoring — in a single platform rather than requiring separate tools for each stage. The 2025 strategy focuses on expanding workflow complexity support (longer multi-agent pipelines), growing enterprise adoption with SSO and access controls, and adding AI-powered evaluation that automatically judges output quality. ## Frequently Asked Questions ### What is Vellum? Vellum is an AI development platform company founded in 2023 that helps developers build production-worthy LLM applications. The platform provides end-to-end tools for prompt engineering, evaluation, and deployment to enable reliable and fast AI application development for enterprises. ### What products and services does Vellum offer? Vellum offers an AI development platform focused on LLM application development. The platform includes capabilities for prompt engineering, evaluation, deployment, and building production-worthy AI applications for enterprises. ### Who is Vellum designed for? Vellum targets developers and AI application builders who need to create production-worthy LLM applications. The platform serves enterprises seeking reliable and fast AI development solutions. ### When was Vellum founded? Vellum was founded in 2023 by Noa Flaherty, Sidd Seethepalli, and Akash Sharma. The company participated in Y Combinator's Winter 2023 batch. ### Where is Vellum located? Vellum is based in New York, New York. ### How much funding has Vellum raised? Vellum has raised $24.5M in total funding, including a $5M seed round in July 2023 from Rebel Fund, Eastlink Capital, and notable investors like Dropbox co-founder Arash Ferdowsi and Hubspot co-founder Dharmesh Shah. The company also raised a $20M Series A round in July 2025. ### What are Vellum's key achievements and metrics? Vellum achieved 25-30% month-over-month revenue growth as of July 2023 and has maintained consistent 15% monthly growth. The company currently has 23 employees. ### What technology approach does Vellum use? Vellum focuses on enabling LLM reliability and speed through an end-to-end platform that includes prompt engineering, evaluation, and deployment capabilities. The platform is designed to help developers build production-worthy AI applications. ### How can I get started with Vellum? Based on the provided information, Vellum offers an AI development platform for developers building LLM applications. Specific contact or onboarding details are not included in the available information. ### What are Vellum's recent developments? Vellum recently closed a $20M Series A funding round in July 2025 while maintaining 15% month-over-month growth. The company continues to expand its LLM application platform for enterprise AI development. ## Tags ai-powered, b2b, developer-tools, infrastructure, platform, cloud-native, saas --- *Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*