DevOps and observability

• PostHog AI Observabilityby PostHogYC W20Trace, evaluate, and cost-track LLM calls inside PostHogFreemiumWatch
• Langfuseby LangfuseYC W23Open-source platform for tracing, evaluating, and improving LLM and agent applicationsFreemiumWatch
• Evidently AIby Evidently AIYC S21Open-source AI evaluation and observability for LLMs and ML modelsUnknownWatch
• Mastraby MastraYC W25Open-source TypeScript framework for building AI agents and appsFreemiumWatch
• Laminarby LaminarYC S24Trace AI agents and find recurring failures across their runsFreemiumWatch
• Confident AIby Confident AIYC W25AI quality platform for evaluating, tracing, and monitoring LLM applications across teams.FreemiumWatch

That’s all 6 tools.