Vellum

Vellum

Platform for end-to-end LLM application lifecycle

Overview

Vellum.ai provides a platform to build, deploy, and manage LLM-powered applications. It covers the full lifecycle of AI features—from prompt engineering and semantic search to version control, quantitative testing, and performance monitoring—so teams can create reliable AI experiences. The product works by offering integrated tools that connect with all major LLM providers and open-source models, enabling users to craft prompts, search and retrieve results semantically, track changes, run automated tests, and monitor model performance within a single subscription service. Vellum.ai differentiates itself by offering end-to-end lifecycle support across diverse model families, with emphasis on security, privacy, and scalability, plus optional premium services like custom model integrations and advanced analytics. Its goal is to help businesses and researchers deploy LLM-powered features with confidence and measurable performance at scale.

YC Company
Significant Headcount Growth

About Vellum

Simplify's Rating
Why Vellum is rated
B-
Rated B on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Data & Analytics

Enterprise Software

AI & Machine Learning

Company Size

11-50

Company Stage

Series A

Total Funding

$25.1M

Headquarters

New York City, New York

Founded

2023

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Simplify's Take

What believers are saying

  • November 2025 docs added GPT 5.1, Gemini 3 Pro Preview, and Kimi K2 Thinking.
  • Vellum expanded native integrations in November 2025, including PostHog, Tavily, Semrush, and Coinbase.
  • Jobs page still listed engineering and go-to-market roles in February 2026.

What critics are saying

  • OpenAI, Anthropic, AWS Bedrock, and LangChain commoditize prompt workflows and evaluations.
  • Vellum's public hiring looks thin; Ashby showed only three roles in February 2026.
  • If large-model vendors bundle agent ops, Vellum becomes a feature, not a company.

What makes Vellum unique

  • Vellum ships versioned workflows, sandbox diffs, and evaluation tooling for production AI.
  • July 2025 Series A validated enterprise focus with Leaders Fund and Y Combinator.
  • Customers like Redfin, Drata, Swisscom, and Headspace signal regulated-workload credibility.

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Funding

Total Funding

$25.1M

Above

Industry Average

Funded Over

3 Rounds

Notable Investors:
Series A funding typically happens when a startup has a product and some customers, and now needs funding to scale. This money is usually used to grow the team, expand marketing, and improve the product. Venture capital firms are frequently the main investors here.
Series A Funding Comparison
Above Average

Industry standards

$15M
$8.2M
Discord
$15M
Canva
$20M
Vellum
$30M
Kalshi

Growth & Insights and Company News

Headcount

6 month growth

-2%

1 year growth

3%

2 year growth

17%
Impulse Generator
May 26th, 2026
Vellum raises $25M Series A for AI developer platform targeting non-technical teams

Vellum, an AI developer platform, has raised $25 million in Series A funding to expand its operations-focused infrastructure for managing AI models. The company's platform enables both technical and non-technical team members to iterate on AI workflows, addressing the industry's shift towards unified lifecycle management tools. The funding reflects growing demand for consolidated AI operations platforms as companies move away from fragmented toolsets that previously led to high production failure rates. Vellum's approach focuses on solving challenges including data privacy, model drift and compute costs whilst making AI development accessible to product teams. The round comes as the AI market enters what investors describe as an "operations-centric" phase, where managing deployed models has become as critical as building them.

Business Wire
Jul 11th, 2025
Vellum Raises $20M Series A to Bring Rigor, Speed and Reliability to Enterprise AI Development

Vellum, the leading enterprise development platform for building, testing and deploying mission-critical AI products, today announced it has raised $20 milli...

Genaro Palma Consulting EOOD
Jul 10th, 2025
Vellum Secures $20M to Scale Enterprise AI Development

Vellum raises $20M Series A led by Leaders Fund, joined by Socii Capital, Y Combinator, Rebel Fund, and others.

StreetInsider
Jul 10th, 2025
Vellum Secures $20M for AI Development

Vellum raised $20 million in Series A funding led by Leaders Fund, with participation from Socii Capital and existing investors. The funding will accelerate Vellum's product innovation and global expansion, addressing the enterprise gap where 54% lack a comprehensive AI strategy. Vellum's platform helps companies like Drata and Swisscom operationalize AI, offering a centralized control panel for AI workflows, testing, and deployment, ensuring reliability and compliance.

VentureBeat
Jan 15th, 2025
Early Days For Ai: Only 25% Of Enterprises Have Deployed, Few Reap Rewards

Join our daily and weekly newsletters for the latest updates and exclusive content on industry-leading AI coverage. Learn More. 2025 is anticipated to be the year AI gets real, bringing specific, tangible benefit to enterprise. However, according to a new State of AI Development Report from AI development platform Vellum, we’re not quite there yet: Just 25% of enterprises have deployed AI into production, and only a quarter of those have yet to see measurable impact. This seems to indicate that many enterprises have not yet identified viable use cases for AI, keeping them (at least for now) in a pre-build holding pattern. “This reinforces that it’s still pretty early days, despite all the hype and discussion that’s been happening,” Akash Sharma, Vellum CEO, told VentureBeat. “There’s a lot of noise in the industry, new models and model providers coming out, new RAG techniques; we just wanted to get a lay of the land on how companies are actually deploying AI to production.”Enterprises must identify specific use cases to see successVellum interviewed more than 1,250 AI developers and builders to get a true sense of what’s happening in the AI trenches. According to the report, the majority of companies still in production are in various stages of their AI journeys — building out and evaluating strategies and proofs of concept (PoC) (53%) beta testing (14%) and, at the lowest level, talking to users and gathering requirements (7.9%). By far, enterprises are focused on building document parsing and analysis tools and customer service chatbots, according to Vellum. But they are also interested in applications incorporating analytics with natural language, content generation, recommendation systems, code generation and automation and research automation.So far, developers report competitor advantage (31.6%), cost and time savings (27.1%) and higher user adoption rates (12.6%) as the biggest impacts they’ve seen so far. Interestingly, though, 24.2% have yet to see any meaningful impact from their investments. Sharma emphasized the importance of prioritizing use cases from the very start

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