# Vellum AI

> AI development platform for building, testing, and deploying LLM workflows.

Vellum AI is an enterprise LLM development platform that streamlines the entire lifecycle of building production AI applications — from prompt engineering and evaluation to deployment, monitoring, and iteration. It provides a visual prompt playground, version control for prompts and models, automated regression testing, production traffic routing, and detailed analytics on LLM performance and costs. AI product teams at companies building customer-facing LLM features use Vellum to ship AI applications faster, maintain quality as they scale, and make data-driven decisions about which models and prompts perform best.

## Quick facts

- Categories: LLM, Developer Tools
- Pricing: Freemium (free plan + paid tiers)
- Free plan: Yes
- Official site: https://vellum.ai
- Last checked: 2026-10-23

## Key features

- LLM application development platform
- Prompt management and versioning
- A/B testing for prompts
- Evaluation workflows
- Workflow orchestration
- Team collaboration

## Use cases

- Managing LLM prompts in production
- Testing and improving AI responses
- LLM application deployment
- AI team collaboration

## Links

- Nextool.ai page: https://nextool.ai/tools/vellum-ai/
- Alternatives: https://nextool.ai/alternatives/vellum-ai/

Source: Nextool.ai (https://nextool.ai/tools/vellum-ai/). Pricing and features change; confirm on the provider's site before relying on them.