Arbolus Intelligence

Vellum AI

vellum.ai · San Francisco, United States of America

Vellum AI provides a platform for building, evaluating, and managing large language model–powered applications, helping software teams compare models, orchestrate prompts, and monitor performance in production. It serves developers and product teams at enterprises and startups, generating revenue through subscription-based access to its SaaS tools and usage-based pricing for higher volumes and advanced features.

  • MLOps & ML Platforms
  • Generative AI Platforms
  • Workflow Automation
Listed in
Revenue
$1.5M
Employees
20
Founded
2022
Headquarters
San Francisco, United States of America

What 5 Arbolus experts think of Vellum AI

All experts provided high NPS scores (9 or 10), showing strong advocacy and satisfaction with Vellum AI. Renewal intention is strongly implied through sustained high usage (over a year for most users) and positive qualitative feedback on fit and value. The customer base is at mature stages of implementation, and ongoing feedback highlights platform strengths in structured AI workflow development and evaluation capabilities. Key themes are positive: streamlined GenAI development for complex workflows and reliable production support. Overall Customer Sentiment: Positive

Who reviewed Vellum AI

Total customers 5 5 current · 0 former
Reviews growth +5 in six months
Seniority of respondents
  • C-Suite 80% (4)
  • Director 20% (1)
Engineering Manager C-Suite NPS 9 Submitted Sep 2026
Strategy Partner C-Suite NPS 8 Submitted Sep 2026
Engineering Leader C-Suite NPS 9 Will renew Submitted Sep 2026

Employer names and spend open in the full report, along with the other 2 customers.

Everything 5 customers told us about Vellum AI.

Employer names, spend, renewal intent and every written answer behind the numbers on this page.

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Sentiment

60 Net Promoter Score, from 5 scored reviews
  • Promoters 3
  • Passives 2
  • Detractors 0

Praised

  • Structured AI Workflow Support
  • Systematic Model and Prompt Evaluation
  • Fit for Complex GenAI Workflows
  • Expand Multi-Step Workflow and Evaluation Tools

Criticised

  • Need for Enhanced Evaluation and Scalability
  • Overlap with Other Tools
  • Limited Value for Simple Applications
  • Internal Tooling and Platform Consolidation

What customers say

Structured AI Workflow Support
“I rely on Vellum AI to structure our development from experimentation to production, reducing the need for custom internal tooling.”
Systematic Model and Prompt Evaluation
“I value how we can experiment and systematically evaluate different prompts and models before deploying to production through Vellum AI.”
Fit for Complex GenAI Workflows
“Vellum AI excels for teams managing multiple, production-oriented GenAI workflows where evaluation and monitoring are crucial.”

Renewal intent

Plan to renew 100%
  • Will renew 1
  • Undecided 0
  • Not renewing 0

Plan to renew, by seniority

  • C-Suite 100% 1 answer
  • 9/10 Average score from customers who will renew

Report

Customer Report - Sep 2026 Sep 2026 5 + 0

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