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Ragas vs Vellum

RagasVellum

Bottom line: Ragas for teams evaluating RAG pipelines; Vellum for teams wanting an all-in-one build-evaluate-deploy platform.

RagasRagas

Open-source evaluation toolkit for RAG and LLM applications.

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VellumVellum

Build, evaluate, and deploy LLM apps and agents with confidence.

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Votes00
PricingFreeFreemium
CategoryLlm ObservabilityLlm Observability
Tags
ragllm-evaluationopen-sourcetestingmetrics
llmopsai-agentsprompt-engineeringevaluationworkflow
Best for
  • Teams evaluating RAG pipelines
  • Developers adding eval to CI/CD
  • RAG researchers and practitioners
  • Teams wanting an all-in-one build-evaluate-deploy platform
  • Cross-functional groups with technical and non-technical members
  • Regulated sectors needing VPC or HIPAA options
Pros
  • Focused, research-backed RAG metrics
  • Free and open source
  • Reduces need for manual labeling via LLM scoring
  • Synthetic test-set generation
  • Broadened to LLM and agent evaluation
  • Combines prompt, workflow, evaluation, and deployment in one platform
  • Visual workflow builder lowers the barrier for cross-functional collaborators
  • Solid evaluation and testing tooling for pre-production quality gates
  • Multi-provider model support avoids lock-in
  • Free tier lets teams trial without a credit card
Cons
  • LLM-as-a-judge scores need validation
  • Mainly a library; you build dashboards/infra
  • Judge model choice affects reliability and cost
  • Python-only
  • Less turnkey than managed eval platforms
  • Pricing is opaque and sales-led, making budgeting hard
  • Not open source, and self-hosting is locked to Enterprise
  • Free tier is quite limited in credits, documents, and seats
  • Smaller company and funding than infrastructure incumbents
  • Frequent repositioning can mean shifting product focus

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