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EvalVellum

Vellum

Build, evaluate, and deploy production LLM apps and agents.

Categories
EvalOrchestration
Pricing
FREEMIUM
Source
Proprietary
Hosting
Cloud
Platforms
WebAPI
Models
Multi-model
Verified
Jun 8, 2026

An end-to-end development platform for building, testing, and shipping LLM applications and agents. Vellum pairs a visual drag-and-drop workflow builder with a Python SDK, and bundles prompt versioning, RAG, evaluation, and production monitoring in one place so technical and non-technical teammates can collaborate. Built-in eval and test suites let teams measure quality before and after deploy. A free tier is available; paid Pro and Enterprise plans add seats and scale.

Capabilities 6

What it actually does — grouped by capability family.

  • Multi-agent orchestration (secondary capability)
  • LLM evaluation (primary capability)
  • Prompt management (secondary capability)
  • LLM observability (secondary capability)
  • RAG pipeline (secondary capability)
  • AI app builder (secondary capability)

Pros & cons

  • Visual builder plus Python SDK
  • Prompt, RAG, eval, monitoring in one
  • Eval and test suites before/after deploy
  • Non-technical collaborators supported
  • Free tier available
  • Cloud-only platform
  • Breadth over best-in-class depth
  • Seat costs at Pro/Enterprise
  • Lock-in to its workflow model

Tags

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