Jan
Jan is an open source alternative to ChatGPT that runs 100% offline on your computer.
open-sourceagent-frameworks
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Commits (90d)
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Releases (6m)
Star Growth
+3.5k (8.4%)
Overview
Jan 是一个开源的 ChatGPT 替代品，完全在本地计算机上离线运行。它为用户提供了运行大型语言模型（LLM）的完全控制权和隐私保护。作为桌面应用程序，Jan 支持 Windows、macOS 和 Linux 平台，拥有超过 4 万 GitHub 星标的活跃社区。与需要云端连接的 AI 服务不同，Jan 让用户能够在自己的硬件上运行 AI 模型，确保数据不会离开本地环境。这种方法特别适合对数据隐私有严格要求的个人用户和企业，同时避免了网络延迟和订阅费用。Jan 的设计理念是将开源 AI 的最佳特性打包到易于使用的产品中，让普通用户也能享受先进的 AI 技术而无需技术专业知识。
Deep Analysis
Key Differentiator
Most polished desktop LLM app combining local inference with cloud providers — ChatGPT-like UX for local models, unlike command-line-focused Ollama
⚡ Capabilities
- • Desktop app to download and run LLMs locally
- • OpenAI-compatible local API server at localhost:1337
- • Cloud provider integration (OpenAI, Anthropic, Mistral, Groq)
- • Custom AI assistants creation
- • MCP integration for agentic capabilities
- • Cross-platform (Windows, macOS, Linux) with GPU support
🔗 Integrations
HuggingFaceOpenAIAnthropicMistralGroqMiniMaxllama.cppOllama
✓ Best For
- ✓ Privacy-focused users wanting local LLM inference
- ✓ Developers needing a local OpenAI-compatible API for testing
✗ Not Ideal For
- ✗ Production server deployments
- ✗ Users without capable hardware (need 8GB+ RAM minimum)
Languages
TypeScriptRust
Deployment
Desktop app (exe/dmg/AppImage)Microsoft StoreFlathubBuild from source
Pricing Detail
Free: Completely free and open-source
Paid: No paid tier
⚠ Known Limitations
- ⚠ Requires significant RAM for larger models (16GB+ for 7B)
- ⚠ GPU recommended for acceptable performance
- ⚠ Desktop-only — no server/cloud deployment mode
- ⚠ Limited to llama.cpp supported model formats
Pros
- + 完全离线运行，确保数据隐私和安全，信息不会泄露到外部服务器
- + 开源软件，用户拥有完全控制权，可自定义和审查代码
- + 支持多平台部署，无需订阅费用，一次安装终身使用
Cons
- - 需要足够的本地计算资源（CPU/GPU/内存）来运行大型语言模型
- - 模型性能可能不如云端商业服务（如 ChatGPT）的最新版本
- - 缺乏云端服务的实时更新和最新功能支持
Use Cases
- • 企业内部 AI 助手，处理敏感数据时确保信息不外泄
- • 个人隐私保护，在处理私人文档或敏感信息时使用本地 AI
- • 网络受限环境下的 AI 应用，如飞行途中或网络不稳定区域
Getting Started
1. 从官网 jan.ai 或 GitHub Releases 下载适合你操作系统的安装包；2. 安装并启动 Jan 应用程序，按照界面提示完成初始设置；3. 下载并加载你需要的 LLM 模型，开始与本地 AI 进行对话
Alternatives
O
Ollama
Get up and running with Kimi-K2.5, GLM-5, MiniMax, DeepSeek, gpt-oss, Qwen, Gemma and other models.
T
TextGen
The original local LLM interface. Text, vision, tool-calling, training, and more. 100% offline.
C
Chatbox
Powerful AI Client
C
Cherry Studio
AI productivity studio with smart chat, autonomous agents, and 300+ assistants. Unified access to frontier LLMs
Works with Jan
Tools that integrate with Jan, often used together in the same stack.
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