Traceloop vs Vellum

A detailed comparison to help you choose between Traceloop and Vellum.

Traceloop

Traceloop

End-to-end observability for LLM applications

Vellum

Vellum

LLM app development platform

Rating3.9 (147 reviews)4.8 (237 reviews)
Pricing Modelfreefreemium
Starting PriceFreeFree tier available
Best ForEngineering teams running LLM applications in production who need visibility into model costs, performance, and error patterns.Product and engineering teams building LLM-powered features who need structured prompt management
Free Tier
API Access
Team Features
Open Source
Tags
free tieropen sourceapi access
free tierapi access
Visit Traceloop →Visit Vellum →

Traceloop

Pros

  • + Integrate with minimal code changes using SDKs
  • + Track token costs and API spending across providers
  • + Visualize complex LLM chains and agent workflows
  • + Monitor latency and identify bottlenecks in AI pipelines

Cons

  • - Requires sending trace data to external service
  • - Limited to supported frameworks and model providers
View full Traceloopreview →

Vellum

Pros

  • + Prompt version control
  • + Evaluation framework
  • + Workflow builder

Cons

  • - Developer tool
  • - Less known vs LangChain
View full Vellumreview →

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Traceloop vs Vellum — Comparison 2026 | ToolSpotter