Apps similar to LangChain include Sim Studio, which is free and open source. Other options are Minion Agent Framework, Cactus, Kastor and Council. You can choose from more than 10 Large Language Model (LLM) Tools like LangChain for Windows, Mac, self-hosting, Linux and the web.
Sim Studio is a powerful platform for building, testing, and optimizing agentic workflows. It provides developers with intuitive tools to design sophisticated agent-based applications through a visual interface.
Open-source agent framework implementing frontier lab techniques: TST, CodeAct, auto-compact, auto decay and MCP support
United States
United Kingdom
Terraform-style source-of-truth layer for AI agents: HCL specs, LangGraph codegen, and plan/apply/state for hosted agents.
Council is an open-source platform for rapidly developing customized generative AI applications using collaborating ‘agents’.
Haystack is an open source NLP framework to interact with your data using Transformer models and LLMs (GPT-4, ChatGPT and alike). Haystack offers production-ready tools to quickly build complex decision making, question answering, semantic search, text generation applications...
Germany
EU
APowerB is an open-source AI agent runtime built by thaink² for building, running and operating production AI agents.
FranceEU
A boutique, white-glove platform for deploying and managing AI agents in production, with token cost optimization and self-hosting options.
SimplAI is an enterprise-grade platform that helps organizations transform into AI-native enterprises. It enables the rapid creation, deployment, and monitoring of intelligent AI agents while automating complex workflows—securely, scalably, and reliably.
United States
LlamaIndex (GPT Index) is a "data framework" to help you build LLM apps. It provides tools for both beginner users and advanced users. Our high-level API allows beginner users to use LlamaIndex to ingest and query their data in 5 lines of code.
Koher is a philosophy for building AI tools that separate language from judgment. The architecture uses three layers: Qualification (AI extracts structured signals from unstructured text), Rules (deterministic code applies thresholds and logic), and Language (AI narrates...
India
A fully open-source agentic framework with visualization, hosting, and deployment developed by academic + professionals with good intent. No premium tiers or feature lock.
Canada