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Vellum

Read 28 Vellum reviews and testimonials from customers, explore 22 case studies and customer success stories, and watch 3 customer videos to see why companies chose Vellum as their AI Automation Software

Vellum’s best-in-class prompt playground lets you systematically iterate and refine prompts with ease. Perform side-by-side comparisons between models from any provider - close sourced, open sourced, and even self-hosted. Use Vellum to build and ship reliable AI solutions. Define, evaluate and monitor AI solutions through test-driven development for AI.

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  • 28 Testimonials View
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Customer Rating Review Score based on 410 reference ratings
4.8/5.0 (410)
  • Winter 2026 Top Performer AI Automation Software
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28Testimonials

  • "Vellum makes it easier to deliver reliable AI apps to our partners and train senior software engineers on emerging AI capabilities. Both are crucial to our business and we’re happy …

    Chris Shepherd AI Product Manager

  • "They way we use Vellum has evolved over time. Vellum's platform has adapted well to support the increasing complexity of our use cases, and Vellum Workflows has already proven helpful …

    Eric Lee Partner & CTO

  • “The biggest impact of Vellum is increased customer trust, driven by our ability to quickly and effectively act on their feedback. Vellum has streamlined workflows and sped up project delivery …

    Katie Christiano Solutions Consultant
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22 Case Studies

  • How Vellum Helped Odyseek Build Smarter AI Faster

    Marina Trajkovska Founding Developer

  • How Narya's team uses Vellum for auto data labeling & deployments

  • How Marveri enabled lawyers to shape AI products without blocking developers

    Michael Dockery Director of Product
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3 Customer Videos

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Additional Vellum Information & Resources

Read Vellum Reviews, Testimonials & Customer References from 28 real Vellum customers.

Browse Vellum Case Studies, Customer Success Stories, & Customer References from 22 businesses that use Vellum.

Watch Vellum Customer Videos to learn why 3 businesses chose Vellum.

FeaturedCustomers has 1,936,838+ validated customer references including reviews, case studies, success stories, customer stories, testimonials and customer videos that will help you make better software purchasing decisions.