langtrace and langwatch
Both are open-source LLM observability platforms built on similar architectures (OpenTelemetry-based tracing with evaluation capabilities), making them direct competitors in the same observability niche rather than complementary tools.
About langtrace
Scale3-Labs/langtrace
Langtrace 🔍 is an open-source, Open Telemetry based end-to-end observability tool for LLM applications, providing real-time tracing, evaluations and metrics for popular LLMs, LLM frameworks, vectorDBs and more.. Integrate using Typescript, Python. 🚀💻📊
Implements automatic instrumentation via SDK initialization that intercepts calls to 11+ LLM providers (OpenAI, Anthropic, Gemini, Bedrock, etc.), 8+ vector databases (Pinecone, Chroma, Qdrant, Weaviate), and frameworks like LlamaIndex and LangChain without code modification. Built on OpenTelemetry standards with a self-hosted option using Next.js, PostgreSQL, and ClickHouse for trace storage and analytics, while the managed cloud version sends data to Langtrace's infrastructure.
About langwatch
tenemos/langwatch
The open LLM Ops platform - Traces, Analytics, Evaluations, Datasets and Prompt Optimization ✨
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