← All brands
LangChain reviews
4.3★ · 720 reviews · San Francisco, USA
The most-deployed open-source framework for LLM apps and agents.
Open-source framework (and LangSmith platform) for building, observing, and evaluating LLM applications and agents. Huge community.
Categories
Highlights
- Largest open-source agent ecosystem
- LangSmith for tracing + evals
- TS + Python parity
Recent reviews
LangSmith made our evals tractable — 4★
The framework itself moves fast (sometimes too fast), but LangSmith for tracing and evaluation has been transformative. We can finally answer 'did this prompt change make things better?'
ML Engineer · AI startup, Germany · 2026-03-09