Traceloop alternatives for multi-step LLM tracing

If you’re looking for Traceloop alternatives for multi-step LLM tracing, the best option depends on whether you want open-source tracing, full observability, or vendor-neutral OpenTelemetry support.

Strong alternatives

1) Langfuse

• Open-source and self-hostable
• Built for LLM app tracing, prompt/version tracking, evaluations, and cost monitoring
• Good support for multi-step chains, agents, and tool calls
• Nice if you want a Traceloop-like developer experience with more control

Best for: teams wanting OSS + production observability

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2) Arize Phoenix

• Open-source observability focused on LLMs
• Excellent for tracing, debugging, evaluations, and experiment analysis
• Strong support for multi-step workflows and retrieval traces
• Works well if you’re also doing RAG

Best for: debugging complex LLM pipelines and RAG systems

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3) Helicone

• Proxy-based LLM observability
• Easy integration for request tracing, metrics, costs, and latency
• Good for API-level visibility; can work well alongside app traces
• Less “workflow-native” than Langfuse, but very simple to adopt

Best for: quick rollout and API usage analytics

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4) OpenTelemetry + custom LLM instrumentation

• Vendor-neutral observability standard
• Flexible if you already use tracing infrastructure like Jaeger, Tempo, Honeycomb, Datadog, or New Relic
• More setup effort, but gives you portability and control
• Good choice if you want to trace each step, span, tool call, and external dependency consistently

Best for: teams with existing observability stacks

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5) LangSmith

• Great if you’re using LangChain
• Strong support for runs, chains, tools, datasets, and evaluations
• Very good for multi-step execution tracing
• More ecosystem-tied than some alternatives

Best for: LangChain-heavy teams

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Other options

• Weights & Biases Weave – useful for LLM app tracing and evals
• Datadog / New Relic / Honeycomb – strong general observability with custom LLM tracing
• Braintrust – evaluation + tracing focused
• Lunary – LLM monitoring and prompt management
• PostHog – can be adapted for LLM app analytics, less specialized

Quick recommendation

• Best Traceloop-like OSS alternative: Langfuse
• Best for RAG + deep debugging: Phoenix
• Best for easy proxy-based tracing: Helicone
• Best if you want standard observability plumbing: OpenTelemetry

If you want, I can also give you:

1. a feature comparison table,
2. which one fits your stack (LangChain / LlamaIndex / custom Python / Node), or
3. open-source vs hosted recommendations.