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Vellum

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Vellum (W23) is a developer platform for building production-worthy applications on LLMs like OpenAI’s GPT-3 or Anthropic’s Claude

New York City, United StatesFounded 2023AI
Valuation $100–250M Last recorded · 2025
Headcount <100 Current team size
Total funding $10–50M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for Vellum and the history behind them.

About Vellum

Vellum.ai is a cutting-edge startup specializing in the development and deployment of Large Language Model (LLM) powered applications. The company provides a comprehensive platform designed to manage the entire lifecycle of LLM applications, from prompt engineering to performance monitoring. Vellum.ai serves a diverse range of clients, including tech companies, AI researchers, and enterprises looking to integrate advanced AI capabilities into their operations.

Operating in the rapidly growing artificial intelligence and machine learning market, Vellum.ai offers tools that facilitate prompt engineering, semantic search, version control, quantitative testing, and performance monitoring. These tools are essential for ensuring that AI models perform reliably and efficiently once deployed in real-world applications.

The business model of Vellum.ai revolves around a subscription-based service, where clients pay for access to the platform's suite of tools and features. Additionally, the company offers premium services such as custom model integration and advanced performance analytics, which provide additional revenue streams.

Vellum.ai makes money by charging clients for platform access, offering premium features, and providing expert consulting services. The platform's ability to support all major LLM providers and open-source models makes it a versatile choice for organizations looking to leverage the power of AI.

In summary, Vellum.ai is a robust platform that helps businesses and researchers deploy LLM-powered features with confidence, ensuring best-in-class security, privacy, and scalability.

Source: Dealroom company data

At a glance

Status
Operational
Founded
2023
Headquarters
New York City, United States
Employees
32
Open positions
None listed
Dealroom signal
62.7/100
Industry
Enterprise Software
Sector
AI, Core AI, Generative AI, MLops, genAI Operation Layer, YC W23
Technology
Artificial Intelligence
Business model
SaaS
Client focus
b2b

Funding history

3 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
SERIES A✓Equity / VC Jul 2025 $20M $80M Y Combinator · Eastlink Capital · Rebel Fund · Pioneer Fund ↗
SEED✓Equity / VC Jul 2023 $5M $20M Eastlink Capital · Y Combinator · Rebel Fund · Pioneer Fund ↗
Showing the latest 2 of 3 recorded eventsBook a demo for the full funding history →

Growth signals

Vellum website traffic

Latest recorded traffic for Vellum is 490K monthly website visits, up 8.9% over the last three months. Vellum's team declined 17.9% over the past year.

Latest monthly visits490K 3-month web change+8.9% 1-year team growth-17.9%
Summary metrics are public; monthly history is available with a demoCompare with peers →

Similar companies

Closest operating peers by Dealroom taxonomy

Company identity and context are open; selected comparison metrics preview what is available on the platform.

Showing 8 of the closest matchesCompare every metric →

Investments and acquisitions

Capital deployed

Recent portfolio relationships for companies that also act as investors or acquirers.

Investors

6 investors on the cap table

From Dealroom's funding and investor records, grouped by the round each investor first entered.

Seed4 investors entered at this stage

Series A2 investors entered at this stage

  • Leaders Fund
  • Socii Capital
Team profiled 11 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 3 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
2 countries with
team presence
🇺🇸 United States90.9%
🇨🇦 Canada9.1%
2 countries shown

Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about Vellum on X, ranked by likes and reposts, corporate channels excluded.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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