LangSmith Alternatives
LangSmith is a unified DevOps platform for developing, collaborating, testing, deploying, and monitoring LLM applications.
LangSmith, part of LangChain, is a platform that provides tools for debugging, testing, evaluating, and managing prompts for LLM applications.
Explore 51 alternatives to LangSmith across 2 categories. Updated October 2026.
Top LangSmith alternatives at a glance
- Klu. Collaborate on prompts, evaluate, and optimize LLM-powered Apps with Klu.
- FinetuneDB. Capture production data, evaluate outputs collaboratively, and fine-tune your LLM's performance
- Langfuse. Traces, evals, prompt management and metrics to debug and improve your LLM application.
- Comet Opik. Comet provides an end-to-end model evaluation platform for AI developers.
- Arize AI. AI observability platform with tracing, evaluation, and monitoring for LLM and ML applications
Compare LangSmith with its alternatives
| Product | Pricing Model | Free Tier | Open Source | Hosting | HQ |
|---|---|---|---|---|---|
| LangSmith | Freemium | ✓ | — | Cloud + Self-hosted | 🇺🇸 United States |
| Klu | Freemium | ✓ | — | Cloud + Self-hosted | 🇺🇸 United States |
| FinetuneDB | Freemium | — | — | Cloud | 🇺🇸 United States |
| Langfuse | Freemium | ✓ | ✓ MIT | Cloud + Self-hosted | 🇩🇪 Germany |
| Comet Opik | Freemium | ✓ | ✓ APACHE2 | Cloud + Self-hosted | 🇺🇸 United States |
| Arize AI | Freemium | ✓ | ✓ ELASTIC-2.0 | Cloud + Self-hosted | 🇺🇸 United States |
| Weights & Biases | Freemium | ✓ | — | Cloud + Self-hosted | 🇺🇸 United States |
| Traceloop | Freemium | ✓ | ✓ | Cloud + Self-hosted | 🇺🇸 United States |
| Helicone | Freemium | ✓ | ✓ APACHE2 | Cloud + Self-hosted | 🇺🇸 United States |
| LangWatch | Freemium | ✓ | ✓ MIT | Cloud + Self-hosted | 🇳🇱 Netherlands |
| Agenta | Freemium | ✓ | ✓ MIT | Cloud + Self-hosted | 🇩🇪 Germany |
| Laminar | Freemium | ✓ | ✓ | Cloud + Self-hosted | — |
| Log10 | — | ✓ | — | — | 🇺🇸 United States |
| Weckr | Freemium | ✓ | ✓ MIT | Cloud | 🇸🇪 Sweden |
| Sentrial | Freemium | ✓ | — | Cloud | 🇺🇸 United States |
| Telemetry | Freemium | ✓ | — | Cloud | 🇺🇸 United States |
🧠 Fine-tuning
📊 Observability & Analytics
Comet Opik
Comet provides an end-to-end model evaluation platform for AI developers.
Agenta
Open-source prompt management, evaluation, and observability for LLM apps
Laminar
Open-source agent observability with traces, failure detection and evals
Dunetrace
Runtime reliability and failure detection for AI agents
RAGAS
Open-source evaluation and testing framework for LLM and RAG applications
Braintrust
Stop building AI in the dark.
Browse all 21 Fine-tuning products Browse all 61 Observability & Analytics products
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