LangSmith is too expensive for my team, what else should I use?

If LangSmith is too expensive, the best alternative depends on what you actually need from it:

If you want tracing / debugging LLM apps

• OpenTelemetry + your own dashboard
  Best low-cost option if your team can tolerate a bit of setup. You can send traces to:

  • Grafana Tempo
  • Jaeger
  • Honeycomb
  • Datadog
  • SigNoz

• Helicone
  Good for LLM request logging, costs, latency, prompt/response history, and team usage. Often cheaper/easier than LangSmith for observability.

• Phoenix by Arize
  Strong for tracing, evaluations, and LLM debugging. Good if you want more evaluation workflow, not just logs.

• PromptLayer
  Useful for prompt/version management and logging. Simpler than LangSmith in some cases.

If you want evaluations / test sets

• Phoenix
• TruLens
• Ragas
• OpenAI Evals (more DIY)
• DeepEval

If you want prompt/version management

• PromptLayer
• Humanloop
• Helicone (lighter here)
• Weights & Biases Weave if your team already uses W&B

If you want an all-in-one cheaper self-hosted route

• Langfuse This is probably the closest “budget LangSmith” alternative for many teams:

  • tracing
  • prompt management
  • evals
  • user feedback
  • self-hosting available
  • open source

• Arize Phoenix Also strong, especially for observability + evals.

Quick recommendation

If you want the closest practical replacement:

1. Langfuse if you want an open-source, self-hostable LangSmith-like tool
2. Helicone if you mainly want API logging/cost tracking
3. Phoenix if you care a lot about evaluation and analysis

If you tell me:

• your stack (LangChain, LlamaIndex, custom)
• whether you need tracing, evals, prompt management, or cost tracking
• cloud vs self-hosted

…I can recommend the cheapest fit for your team.