Langflow
Visual builder for AI agents and RAG pipelines — LangChain-powered.
MIT-licensed alternative to Flowise with Python code nodes, multi-agent orchestration, and vector store integration. pip install or Docker.
Langfuse
LLM engineering platform — tracing, prompt management, cost tracking.
MIT-licensed alternative to LangSmith. Full observability for LLM chains, version-controlled prompts, A/B testing, and dataset evaluation.
Helicone
LLM observability and AI gateway — one-line integration for logging, cost tracking, prompt management, and rate limiting
Build reliable AI apps with comprehensive observability
Laminar
Agent observability and evaluation platform — signal alerts, trace debugging, and automated evals for LLM products
AI-powered platform for engineering LLM products