These tools competes with
VellumvsPromptFoo
Prompt engineering, testing, and deployment platform versus CLI/library for prompt testing and red-teaming
Compare interactively in Explore →Choose Vellum when…
- •You want a full LLM product development platform
- •Prompt management, testing, and deployment in one place
- •You're iterating on prompts in a team workflow
Choose PromptFoo when…
- •You want CLI-first, config-driven LLM evals
- •Running eval suites in CI/CD pipelines is a goal
- •You need red-teaming and safety testing built in
Side-by-side comparison
Field
Vellum
PromptFoo
Category
Prompt & Eval
Prompt & Eval
Type
Commercial
Open Source
Free Tier
✓ Yes
✓ Yes
Pricing Plans
Starter: Paid
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GitHub Stars
—
⭐ 5,000
Health
—
●80 — Active
Vellum
End-to-end platform for prompt engineering teams. Version prompts, run A/B tests, evaluate quality, and deploy to production with a visual interface.
Only Vellum (2)
PromptFooHumanloop
Only PromptFoo (6)
VellumLangfuseDeepEvalOpenAI APIAgentaGalileo
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