FastGPT license, foundation and stars

LLM application frameworks · FastGPT Open Source License (Apache 2.0 with multi-tenant SaaS and logo restrictions) (source-available) · backed by Labring · 30,020 stars

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FastGPT is a knowledge-based platform built on the LLMs, offers a comprehensive suite of out-of-the-box capabilities such as data processing, RAG retrieval, and visual AI workflow orchestration, letting you easily develop and deploy complex question-answering systems without the need for extensive setup or configuration.

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Project	License	Stars	Per week	Latest release
DifyBuild Agentic workflows, RAG pipelines, with rich AI model and tool support on one collaborative workspace.LangGeniusDify Open Source License (Apache 2.0 with multi-tenant SaaS and logo restrictions)	Dify Open Source License (Apache 2.0 with multi-tenant SaaS and logo restrictions)changed Jul 2023	161k	+524	1.17.1Sep 10, 2026
Open WebUIUser-friendly AI Interface (Supports Ollama, OpenAI API,...).Open WebUIOpen WebUI License (BSD-3-Clause plus branding-preservation clause)	Open WebUI License (BSD-3-Clause plus branding-preservation clause)changed Apr 2025	158k	+753	-
langflowLangflow is a powerful tool for building and deploying AI-powered agents and workflows.MIT	MIT	156k	+171	-
LangChainThe agent engineering platform.LangChainMIT	MIT	149k	+308	langchain-core==1.6.5Sep 24, 2026
ragflowRAGFlow is an agent-native database: a Retrieval-Augmented Generation (RAG) engine that grew into context infrastructure.Apache 2.0	Apache 2.0	93.6k	+384	-
deer-flowAn open-source long-horizon SuperAgent harness that researches, codes, and creates.MIT	MIT	85.2k	+321	-
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mem0The Memory Layer for AI Agents - Drop-in memory infrastructure for AI agents and apps.Apache 2.0	Apache 2.0	68.3k	+383	-