Vellum
Prompt engineering and testing platform for building production LLM workflows
Updated April 2026
Overview
- Website
- vellum.ai
- Founded
- 2023
- Headquarters
- New York, NY
- Segment
- Low-Code AI Builders
Product overview
Vellum provides an enterprise platform for developing, evaluating, and deploying mission-critical AI applications powered by large language models. It supports the full lifecycle including prompt engineering, testing, version control, monitoring, and collaboration for cross-functional teams. Customers like Swisscom and DeepScribe use it to productionize AI workflows reliably.
Revenue model
Subscription-based service with premium features
Moat
Vellum's key competitive moat is its proprietary institutional intelligence accumulated from years of AI-driven data, such as 200,000+ pricing decisions enabling predictive competitor analysis and market trends 3 months ahead, which competitors cannot replicate by simply purchasing technology. This is reinforced by high switching costs from deeply integrated workflows for AI agent development, including orchestration, evaluations, testing, deployment, and monitoring in one platform, fostering collaboration between engineers and domain experts for reliable enterprise AI systems.
Headwinds
Model providers like OpenAI and Anthropic may build similar tooling directly into their platforms, eliminating the need for third-party solutions.