LangChain vs Portkey

LangChain is a free, MIT-licensed open-source framework for building agents with models and tools. Its create_agent harness combines a model, tools, prompt and middleware, with templates for common uses and a ReAct pattern. Middleware can add human approval, conversation compression, sensitive-data removal, guardrails, retries, routing and custom tool policies. Agents run on LangGraph’s durable runtime, which supports persistence, rewind, checkpointing and human-in-the-loop workflows. LangChain documents more than 1,000 integrations across chat and embedding models, tools, toolkits, document loaders and vector stores. Standard interfaces for chat models and embeddings support switching providers with minimal code changes. Documentation covers Python and JavaScript/TypeScript. LangSmith adds tracing, debugging and output evaluation. The framework supports API and self-hosted use. LangChain was started in 2023 and is headquartered in San Francisco.

Portkey is a platform for managing, observing, and governing generative AI across teams. Its gateway offers a unified API for models and providers across modalities, with configurable routing, failovers, retries, and load balancing. Monitoring tools include logs, traces, feedback, metadata, filters, and alerts; prompt management adds templates, a playground, API endpoints, versioning, and variables. Listed integrations include OpenAI, Anthropic, Google Gemini, Azure, Amazon Bedrock, and Ollama, as well as agent frameworks including CrewAI, LangChain, LangGraph, and the OpenAI Agents SDK. The gateway offers simple and semantic caching for repeat requests. Security features include virtual provider keys, access controls, inbound IP and geographic rules, and sensitive-data redaction. Self-hosted and local deployment options are listed, while Enterprise adds private cloud deployment and VPC hosting. Developer is free and includes 10k recorded logs/month, 3 days log retention, and 30 days metrics retention. Production costs $49 a month, billed $49/month, with 100k recorded logs/month and production support. Enterprise pricing is custom. Portkey lists San Francisco as its headquarters and March 2023 as its launch date.