langfuse and langwatch
These are direct competitors offering overlapping LLM observability, evaluation, and prompt management capabilities, where Langfuse is the established market leader with significantly broader adoption and integration support, while Langwatch appears to be an early-stage alternative pursuing the same use cases.
About langfuse
langfuse/langfuse
🪢 Open source LLM engineering platform: LLM Observability, metrics, evals, prompt management, playground, datasets. Integrates with OpenTelemetry, Langchain, OpenAI SDK, LiteLLM, and more. 🍊YC W23
Provides distributed tracing via SDKs (Python, JavaScript/TypeScript) that capture full LLM call chains with automatic context propagation, backed by ClickHouse for scalable analytics. Features a unified API surface for programmatic access to traces, evaluations, and datasets, enabling custom workflows and integration into existing MLOps pipelines alongside LangChain, LlamaIndex, and other frameworks.
About langwatch
tenemos/langwatch
The open LLM Ops platform - Traces, Analytics, Evaluations, Datasets and Prompt Optimization ✨
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