21st vs. LangChain Comparison


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About 21st is a developer platform that provides the fastest way to add AI agents directly into applications. The platform offers an SDK that allows developers to define, deploy, and run AI agents with minimal infrastructure setup. Developers can integrate agents using popular frameworks such as Next.js, React, TypeScript, Python, and Node.js. 21st includes built-in features like chat interfaces, session history, tool execution, memory, and real-time streaming responses. The platform also manages backend components such as sandboxed execution environments, authentication, rate limits, and observability. With support for Claude Code and Codex runtimes, developers can build agents that interact with tools, files, and APIs securely. By handling infrastructure and deployment automatically, 21st enables teams to launch production-ready AI agents quickly.	About LangChain is a powerful, composable framework designed for building, running, and managing applications powered by large language models (LLMs). It offers an array of tools for creating context-aware, reasoning applications, allowing businesses to leverage their own data and APIs to enhance functionality. LangChain’s suite includes LangGraph for orchestrating agent-driven workflows, and LangSmith for agent observability and performance management. Whether you're building prototypes or scaling full applications, LangChain offers the flexibility and tools needed to optimize the LLM lifecycle, with seamless integrations and fault-tolerant scalability.
Platforms Supported Windows Mac Linux Cloud On-Premises iPhone iPad Android Chromebook	Platforms Supported Windows Mac Linux Cloud On-Premises iPhone iPad Android Chromebook
Audience Software developers, startups, and product teams that want a fast and scalable way to build and deploy AI agents inside their applications	Audience Developers searching for a framework for developing applications powered by language models
Support Phone Support 24/7 Live Support Online	Support Phone Support 24/7 Live Support Online
API Offers API	API Offers API
Screenshots and Videos View more images or videos	Screenshots and Videos View more images or videos
Pricing Free Free Version Free Trial	Pricing No information available. Free Version Free Trial
Reviews/Ratings Overall 0.0 / 5 ease 0.0 / 5 features 0.0 / 5 design 0.0 / 5 support 0.0 / 5 This software hasn't been reviewed yet. Be the first to provide a review: Review this Software	Reviews/Ratings Overall 5.0 / 5 ease 5.0 / 5 features 5.0 / 5 design 5.0 / 5 support 5.0 / 5 Read all reviews
Training Documentation Webinars Live Online In Person	Training Documentation Webinars Live Online In Person
Company Information 21st.dev 21st.dev/	Company Information LangChain Founded: 2022 United States www.langchain.com
Alternatives Claude Agent SDK Claude	Alternatives Gemini Enterprise Agent Platform Google
VibeKit	LM-Kit.NET LM-Kit
Strands Agents	StackAI
Convo	LangSmith LangChain
OpenAI Agents SDK OpenAI View All	PromptLayer View All
Categories AI SDKs UI Design	Categories Agentic Process Automation AI Agent Frameworks AI Agent Infrastructure AI Agent Observability AI Automation AI Development AI Orchestration AI SDKs Context Engineering Development Frameworks Prompt Engineering Prompt Management

Integrations Agent Communication Protocol (ACP) AgentOps AgentSea Arize AI Barndoor.ai Database Mart E2B Gemma 2 LangSmith Lunary NVIDIA Blueprints Naptha OpenMail Peta Pillar Security Python Ragas ScraperAPI Zyte mcp-use Show More Integrations View All 3 Integrations	Integrations Agent Communication Protocol (ACP) AgentOps AgentSea Arize AI Barndoor.ai Database Mart E2B Gemma 2 LangSmith Lunary NVIDIA Blueprints Naptha OpenMail Peta Pillar Security Python Ragas ScraperAPI Zyte mcp-use Show More Integrations View All 134 Integrations
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