Langchain

Name: Langchain
Rating: 4.96 (105 reviews)

LangChain’s suite of products supports AI development

5.0•105 reviews•

900 followers

LangChain’s suite of products supports AI development

5.0•105 reviews•

900 followers

Visit website

LLMs

•

Unified API

•

AI Infrastructure Tools

•

AI Metrics and Evaluation

•

LLM Developer Tools

Wispr Flow: Dictation That Works EverywhereStop typing. Start speaking. 4x faster.

Promoted

Langchain Launches

Langchain AI Email AssistantThe prototype of ambient agents

Launched on January 20th, 2025

LangSmith General AvailabilityLLM application development, monitoring, and testing

Launched on February 15th, 2024

LangChain TemplatesA collection of production-ready reference architectures

Launched on October 31st, 2023

LangSmithBuild and deploy LLM applications with confidence

Launched on July 20th, 2023

Forum Threads

p/langchain

•

7mo ago

LangChain announces Series B raising $125M at a $1.25B valuation

From @hwchase17 :

Today, we re announcing we ve raised $125M at a $1.25B valuation to build the platform for agent engineering. We re also releasing new capabilities to accelerate the path to reliable agents, including LangChain and LangGraph 1.0 releases, a new Insights Agent, and a no code agent builder. IVP led the round alongside existing investors Sequoia, Benchmark, and Amplify, as well as new investors CapitalG and Sapphire Ventures.

Imagine that they got their start here when I hunted @LangSmith in 2023.
Man, shoulda invested back then!

View all

Company Info

langchain.com

Langchain Info

Launched in 2023

View 4 launches

Forum

p/langchain

Awards

View all

AppSignalGet the APM insights you need without enterprise price tags.

Promoted

Similar Products

Langfuse

Open Source LLM Engineering Platform

5.0(45 reviews)

AI Infrastructure Tools AI Metrics and Evaluation

Respan

Self-driving AI observability and evals for agents

5.0(4 reviews)

Data analysis tools Unified API

GraphBit

Rust-core, Python-first Agentic AI framework

5.0(21 reviews)

AI Infrastructure Tools LLM Developer Tools

Latitude

The Agent Observability Platform

5.0(5 reviews)

AI Metrics and Evaluation Observability tools

Perplexity API Platform

Power your products with web-wide research, Q&A capabilities

5.0(1 review)

Unified API AI Infrastructure Tools

5.0

Based on 105 reviews

Review Langchain?

Reviewers see LangChain as a powerful but sometimes heavy framework for building agentic LLM apps. They consistently praise its large ecosystem, broad integrations, modular building blocks, and support for complex workflows, external data, and production use. Several also highlight LangSmith for debugging and tracing. But the main complaint is developer experience: docs can feel overwhelming, simple tasks may take too much code, and some parts seem too wrapped or opaque. One reviewer also notes friction around LangGraph Platform-specific features.

+102

Summarized with AI

Pros

agentic workflow support (19)

LangGraph framework (11)

model integration (10)

LangSmith observability (7)

scalable AI development (6)

RAG workflows (5)

rapid prototyping (5)

flexible framework (4)

community support (3)

complex data source integration (3)

Pros

Cons

Reviews

All Reviews

Most Informative

•1 review

What's great

LangChain is fantastic in the sense that it has a huge ecosystem, many integrations, and it helped move the whole LLM app space forward. I respect that part.

What needs improvement

For me, the biggest issue is developer experience.

LangChain often feels too deep, too wrapped, and over-designed. Simple things can require too much code and too much framework-specific knowledge.

I would love to see a much simpler default path, clearer docs, less boilerplate, and more transparency around the actual agent loop.

vs Alternatives

I also considered using simpler agent SDKs, like openai-agents-sdk\claude agent sdk.... and direct model APIs. For many common agent use cases, those feel much lighter and easier to control.

Ratings

Ease of use

Reliability

Value for money

Customization

Report

10 views5d ago

Exstats

•7 reviews

What's great

LangSmith observability (7)LangGraph framework (11)agentic workflow support (19)

I use LangChain and their implementation of DeepAgents in my products, and I can honestly say this is a huge contribution to the AI community!

It makes building capable agents much more practical. Memory, skills, reasoning, and todos well designed and usable in actual products. I know it was inspired by Claude, but the implementation is excellent and under open-source. Well done.

Debugging with LangSmith is a special kind of love haha. Love it! Highly recommend it.

What needs improvement

Do not automatically include all LANGSMITH_* and LANGCHAIN_* env variables in LangSmith traces when tracking is enabled.

Ratings

Ease of use

Reliability

Value for money

Customization

Report

72 views2mo ago

used Langchain to build Super

•8 reviews

Langgraph helped build Super by providing a standardized framework that made the complex LLM/source interactions more manageable through a declarative graph structure. It enabled better parallelization which significantly improved response speed, while also providing full graph state/sequence debugging capabilities that made troubleshooting easier. The migration to Langgraph unlocked new capabilities like human-in-the-loop pauses for clarification and better fallback mechanisms when models fail. Additionally, Langgraph's functional API allowed developers to write more natural, sequential code for complex subgraphs while still maintaining the benefits of the graph framework.

What's great

flexible framework (4)LangGraph framework (11)scalable AI development (6)complex data source integration (3)

Report

156 views1yr ago

•1 review

What's great

LangChain is fantastic in the sense that it has a huge ecosystem, many integrations, and it helped move the whole LLM app space forward. I respect that part.

What needs improvement

vs Alternatives

I also considered using simpler agent SDKs, like openai-agents-sdk\claude agent sdk.... and direct model APIs. For many common agent use cases, those feel much lighter and easier to control.

Ratings

Ease of use

Reliability

Value for money

Customization

Report

10 views5d ago

Exstats

•7 reviews

What's great

LangSmith observability (7)LangGraph framework (11)agentic workflow support (19)

I use LangChain and their implementation of DeepAgents in my products, and I can honestly say this is a huge contribution to the AI community!

What needs improvement

Do not automatically include all LANGSMITH_* and LANGCHAIN_* env variables in LangSmith traces when tracking is enabled.

Ratings

Ease of use

Reliability

Value for money

Customization

Report

72 views2mo ago

used Langchain to build Super

•8 reviews

What's great

flexible framework (4)LangGraph framework (11)scalable AI development (6)complex data source integration (3)

Report

156 views1yr ago