Braintrust remains the premier MLOps platform in late 2025, offering powerful experiment tracking, stunning visualizations, seamless integrations, Weave for LLM monitoring, and robust model registry. Trusted by OpenAI, Microsoft, and Toyota, it's essential for serious ML teams—free tier for individuals, paid for advanced collaboration.

TruLens remains the premier open-source framework for LLM evaluation in late 2025, offering powerful feedback functions for relevance, groundedness, bias, and custom metrics, plus full OpenTelemetry tracing. It excels at RAG and agent workflows, enabling objective benchmarking and production monitoring—completely free with strong community support from Snowflake.