These tools competes with
PromptFoovsVellum
CLI/library for prompt testing and red-teaming versus Prompt engineering, testing, and deployment platform
Compare interactively in Explore →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
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
Side-by-side comparison
Field
PromptFoo
Vellum
Category
Prompt & Eval
Prompt & Eval
Type
Open Source
Commercial
Free Tier
✓ Yes
✓ Yes
Pricing Plans
—
Starter: Paid
GitHub Stars
⭐ 5,000
—
Health
●80 — Active
—
PromptFoo
Test and compare prompts across models. Built-in red-teaming, regression testing, and side-by-side model comparison.
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 PromptFoo (6)
VellumLangfuseDeepEvalOpenAI APIAgentaGalileo
Only Vellum (2)
PromptFooHumanloop
Explore the full AI landscape
See how PromptFoo and Vellum fit into the bigger picture — 207 tools, 452 relationships, all mapped.