LangSmith
LangChain's hosted tracing and evaluation platform, priced by seat and trace volume.
3 self-hosted replacements in this index, ranked by GitHub stars in the dataset.
Replacements
Langfuse
LLM engineering platform for model tracing, prompt management, and application evaluation. Langfuse helps teams collaboratively debug, analyze, and iterate on their LLM applications such as chatbots or AI agents.
36,848 stars Active
1 Nov 2026 v4.72.0
Opik
Evaluate, test, and ship LLM applications with a suite of observability tools to calibrate language model outputs across your dev and production lifecycle.
23,101 stars Active
30 Oct 2026 2.2.137
Agenta
LLMOps platform for prompt management, LLM evaluation, and observability. Build, evaluate, and monitor production-grade LLM applications with collaborative prompt engineering.
4,879 stars Active
30 Oct 2026 v0.128.0
Popular comparisons
The most-starred pairings among these replacements, ranked by combined GitHub stars in the dataset.