Vellum

Build, test, deploy, and operate AI applications

4.7/5 Rating Freemium - Free Base plan is free, Pro starts at $30/month, usage credits are pay-as-you-go, model provider costs are passed through at cost, custom configurations can add machine and storage charges, taxes may apply Free Trial Available

Enterprise Technology Specs

Underlying Engine Anthropic, OpenAI, Google, Meta, Fireworks, OpenRouter
Compliance & Security SOC2 Type II
Data Privacy No Training by Vellum
Deployment Time <5 minutes

Product Demo

The Deep Dive

Vellum is interesting because it sits between an AI engineering platform and an AI assistant. For development teams, the useful part is the workflow layer: you can visually build multi-step systems, test different scenarios, deploy them, and inspect what happens at each stage. That makes it much easier to move beyond a single prompt and start thinking about AI as an actual application.

For everyday users, the current Vellum assistant takes a different approach. It can remember context, connect to services, browse the web, interact with computers, and perform approved actions. That makes it more practical for recurring work than a standard chat window.

The main catch is that Vellum is not the simplest choice if you only want occasional AI responses. Its value increases as your workflows become more complex and you need testing, integrations, deployment, and control.

Key Capabilities

Visual AI workflow builder
Prompt management
Workflow deployment
Workflow versioning
Scenario-based testing
AI agent workflows
Agent Node
Tool calling
RAG document search
API nodes
Python and TypeScript code execution
Subworkflows
Evaluation and monitoring
Multimodal inputs
Prompt caching
Persistent assistant memory
Browser automation
Computer control
OAuth integrations
Self-hosting
VPC deployment options

Top Use Cases

  • Build production AI workflows
  • Create AI agents
  • Prototype LLM applications
  • Build RAG applications
  • Evaluate AI responses
  • Automate business research
  • Connect AI to CRM systems
  • Automate email workflows
  • Create internal AI assistants
  • Build multi-step AI applications
  • Test prompts and models
  • Run AI workflows with code
Verified ROI & Case Study

“Vellum's current official materials do not provide a quantified ROI figure for the current assistant product. Its official documentation states that Workflows can be prototyped, deployed, versioned, and monitored, while the current product site says the assistant can be set up and used across web, macOS, iOS, Slack, Telegram, and terminal environments.”

Frequently Asked Questions

What is Vellum used for?

Vellum is used to build and operate AI applications and workflows. Teams can create prompts, connect models and tools, test workflows, deploy them, and monitor their behavior.

Does Vellum support AI agents?

Yes. Vellum provides an Agent Node designed for tool calling and iterative agent workflows. It can work with code tools, subworkflows, and external integrations.

Is Vellum free?

Vellum currently offers a free Base plan. Paid packages start at $30/month, while additional usage can be charged through Vellum Credits.

Does Vellum support OpenAI and Anthropic?

Yes. Vellum documentation covers models from OpenAI, Anthropic, Google, Meta, and other providers. It also provides controls for model parameters and features such as prompt caching.

Can Vellum connect to business apps?

Yes. Current OAuth integrations include Google, GitHub, HubSpot, Linear, Asana, Notion, Outlook, Todoist, Discord, and other services.