Open-source alternatives to LangSmith

OpenTelemetry LLM observability platform — Open source platform for AI Engineering: OpenTelemetry-native LLM Observability, GPU Monitoring, Guardrails, Evaluations, Prompt Management, Vault, Playground. 🚀💻 Integrates with 50+ LLM Providers, VectorDBs, Agent Frameworks and GPUs.

↔ alternative to LangSmith、Datadog

Desktop app to prototype and debug AI agents — A desktop app to prototype agent ideas, inspect every harness step, replay failures, and evaluate performance, all in one place. Local-first, cloud-ready for managed agents.

↔ alternative to LangSmith