Can I use my own API keys with Vellum?

Yes, Vellum allows you to use your own provider API keys (like Anthropic or OpenAI) especially when running in local mode, or you can use Vellum's managed infrastructure.

Does Vellum support local hosting for data privacy?

Yes, Vellum offers a local hosting option where the assistant and data stay on your machine, which is ideal for maximum data control.

What models can I use within Vellum?

Vellum supports a wide range of models including GPT-5.5, Claude 4.7, Gemini 3, and various open-source models via integration.

Is there a limit on executions in the free plan?

The Startup (Free) plan is limited to 50 prompt executions and 25 workflow executions per day.

Does Vellum offer an SDK?

Yes, Vellum provides official SDKs for both Python and TypeScript to help developers integrate AI workflows into their applications.

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Developer Tools

Freemium

Vellum

End-to-end LLM orchestration platform to build, test, and deploy AI apps. Features a visual workflow builder, prompt engineering tools, and native evaluation for production-grade reliability.

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Rating

Reviews

Upvotes

3 months ago

Listed

LLM Ops

Prompt Engineering

AI Workflows

Model Evaluation

No-Code Builder

AI SDK

Observability

RAG

AI Agents

Tool information

Provider

Vellum AI

Platforms

Web

macOS

iOS

iPadOS

CLI

Languages

English

API Available

Yes

Added to directory

3 months ago

Last updated

about 1 month ago

Rating

Not available

Pricing

Freemium

About Vellum

What the tool does and who it's for

Vellum is an end-to-end LLM orchestration and development platform designed to help teams build, evaluate, and deploy production-grade AI applications. It provides a unified interface to experiment with multiple prompt variants, compare model performances (including OpenAI, Anthropic, and Google), and manage complex AI workflows. The platform features a visual drag-and-drop workflow builder alongside a robust developer SDK for Python and TypeScript, enabling both technical and non-technical stakeholders to collaborate. Vellum includes native tools for regression testing, version control, and real-time observability, ensuring that AI agents and features are reliable, cost-effective, and easy to maintain as underlying models evolve.

Key capabilities

Visual Workflow Builder: A drag-and-drop interface for constructing complex, multi-step AI agentic systems.

Prompt Management: Version-controlled prompt engineering with the ability to test multiple models side-by-side.

Native Evaluations: Built-in regression testing and automated evaluation suites to measure accuracy and reliability.

Observability & Tracing: Deep visibility into node-level traces, tool calls, and model outputs for debugging.

Multi-Model Support: Seamless integration with major providers like OpenAI (GPT-5.5), Anthropic (Claude 4), and Google (Gemini 3).

Developer SDK: Fully-featured Python and TypeScript SDKs for integrating Vellum workflows into existing codebases.

RAG Support: Integrated retrieval pipelines with document embedding and vector database management.

Deployment Options: Flexible hosting including Vellum Cloud, local hosting for data privacy, and VPC options.

Pricing

Freemium — plans below

Startup

Up to 5 users
50 prompt executions per day
25 workflow executions per day
Access to visual builder
Basic observability

Pro

Enterprise

Contact sales

Custom execution limits
Unlimited users
VPC or On-prem deployment options
SLA guarantees
Dedicated account management
Custom governance and audit trails

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