Best Alternatives to LangSmith
Explore 8 top-rated alternatives to LangSmith in the ai observability category. Compare features, pricing, and find the perfect fit for your needs.
About LangSmith
LangSmith is LangChain's commercial observability, evaluation and prompt management platform for LLM apps and agents in production.
Free
Top Recommended Alternatives
Langfuse
LLM Observability
From
FreeLangfuse is an open-source LLM observability and engineering platform providing tracing, prompt management, evaluations, and dataset management for production AI applications.
Key Strengths:
- ✓Open source with free self-hosting — full feature parity without usage limits
- ✓Free Hobby tier on cloud with no credit card — lowest barrier to entry in the category
Arize Phoenix
AI Observability
From
FreePhoenix is Arize's open-source LLM observability project, and it has quietly become the default way tens of thousands of teams see what their agents are actually doing in production. The pitch is simple: `pip install arize-phoenix`, instrument with OpenInference (or any OpenTelemetry-compatible library), and every LLM call, tool invocation, retrieval, and embedding shows up as a spanned timeline you can filter, search, and replay. No vendor account required, no proprietary SDK lock-in. The Open
Key Strengths:
- ✓Permissively open source — full features without a vendor account
- ✓OpenTelemetry-native means Phoenix traces also flow into Datadog, Honeycomb, Tempo
Braintrust
LLM Observability
From
FreeAI observability platform for evals, production tracing, prompt management, and regression detection.
Key Strengths:
- ✓Evals, tracing, and prompt playground in a single shared workbench
- ✓Playground pulls real production traces in for side-by-side comparison
Helicone
LLM Observability
From
FreeOpen-source LLM observability and AI gateway — logs every prompt, response, cost, and latency across 20+ providers with a one-line proxy or async SDK, plus caching, retries, and prompt experiments.
Key Strengths:
- ✓5-minute proxy integration captures full traces, cost, and latency across 20+ providers
- ✓Real AI gateway features (caching, retries, fallback, key vault) replace a custom proxy
More AI Observability Alternatives
Latitude
an open-source AI agent monitoring and observability platform for understanding what agents do in production.
Learn MorePandaProbe
Open-source AI agent engineering platform for tracing, evaluating, and debugging agent runs across any framework and LLM provider.
Learn MoreQuick Comparison
Why Consider LangSmith Alternatives?
While LangSmith is a popular choice in the ai observability category, exploring alternatives can help you find a tool that better matches your specific needs, budget, or workflow preferences.
Common reasons to explore alternatives include:
- Different pricing models or more affordable options
- Specific features that LangSmith may not offer
- Better integration with your existing tools
- Performance or user experience preferences
- Regional availability or support requirements
Compare the tools above to find the best fit for your specific use case.
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