// Evaluate & guard
LangSmith
Closed / commercial For developers
IN ONE PARAGRAPH
LangSmith is evaluate & guard.
Good for: Developers and teams who want to evaluate & guard.
Not for: teams that require open source or self-hosting.
01How to start
- 1Read the official quick-start (link above).
- 2Install or sign up as the official guide describes.
- 3Try it on a small example before wiring it into a project.
02Alternatives & comparison
Compare side by side → promptfoo Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, DeepSeek, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI and Anthropic. ★ 26k openai/evals Evals is a framework for evaluating LLMs and LLM systems, and an open-source registry of benchmarks. ★ 20k deepeval The LLM Evaluation Framework ★ 19k ragas Supercharge Your LLM Application Evaluations 🚀 ★ 16k lm-evaluation-harness A framework for few-shot evaluation of language models. ★ 14k
03Related
Versions, why it is listed, for AI to read
For AI agents
- Interfaces：its own app or website
- Machine-readable record：/api/v1/software/langsmith.json · llms.txt
- Added 2026-10-10