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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 264 reference ratings
4.8/5.0 (264)
  • Winter 2026 Top Performer AI Automation Software
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28Testimonials

  • "We wouldn't have the speed and agility we have today if we hadn't used vellum extensively. It's unique to see a development platform that enables cross-functional collaboration and adds value …

    Adam Daigian Product Advisor

  • "Using Vellum for testing our initial ideas about prompt design and model configuration was a game-changer. It allowed us to work without always needing engineering resources, enabling a broader group …

    Sebi Lozano Senior Product Manager

  • “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 Drata Collaborates on AI Workflows with Vellum

    Pratik Bhat Senior Product Manager

  • ​​How GravityStack Cut Credit Agreement Review Time by 200% with Agentic AI

    Bryon Bratcher Managing Director

  • How Woflow Decoupled AI Updates for 50% Faster Delivery — Without the …

    Michael Liu Data Scientist
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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 1,900,132+ validated customer references including reviews, case studies, success stories, customer stories, testimonials and customer videos that will help you make better software purchasing decisions.