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Jan

Open Source
★ 45,109 • Updated Oct 27, 2026, 03:03 AM

Jan is an open-source alternative to ChatGPT that runs 100% offline on your computer.

Use Cases ▼
01

Using Jan as a self-hosted alternative to ChatGPT for personal or professional use

02

Customizing Jan to meet specific needs or use cases

03

Using Jan as a tool for language learning or language practice

04

Using Jan as a tool for content generation or writing assistance

05

Using Jan as a tool for research or data analysis

What Problem It Solves ▼

Jan solves the problem of users who want to use a chatbot-like tool but are concerned about the privacy and security implications of using a cloud-based solution. By providing a self-hosted alternative to ChatGPT, Jan gives users full control over their data and conversations, eliminating the need for internet connectivity and ensuring that their interactions with the tool remain private. This is particularly important for users who work with sensitive information or who are concerned about the potential risks of using a cloud-based chatbot solution. Jan's offline capability also makes it an attractive option for users who are looking for a more secure and private way to interact with a chatbot-like tool.

Key Features ▼
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Offline capability

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Customization options

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Community-driven development

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Self-hosted solution

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Cross-platform compatibility

Overview

Jan is an open-source alternative to ChatGPT that runs 100% offline on your computer. It is designed to provide a similar experience to ChatGPT but with the added benefit of being able to run locally on your machine, eliminating the need for internet connectivity. Jan is built using the LLaMA model and is designed to be a self-hosted solution, giving users full control over their data and conversations. The tool is highly customizable and can be tailored to meet the specific needs of its users. Jan's offline capability makes it an attractive option for those who value privacy and security. The tool's open-source nature also means that it is constantly being improved and updated by a community of developers, ensuring that it stays up-to-date with the latest advancements in AI technology. Jan's user interface is designed to be intuitive and user-friendly, making it easy for users to interact with the tool and get the most out of its features. Overall, Jan is a powerful and flexible tool that offers a unique alternative to traditional chatbot solutions. Jan's architecture is based on the Tauri framework, which allows it to be cross-platform and run on multiple operating systems, including Windows, macOS, and Linux. The tool's core functionality is built around the LLaMA model, which is a state-of-the-art language model that is capable of understanding and generating human-like text. Jan's offline capability is made possible by its ability to run the LLaMA model locally on the user's machine, eliminating the need for internet connectivity. The tool's customization options allow users to tailor the experience to their specific needs, including the ability to fine-tune the model and adjust the tool's settings. Jan's community-driven development ensures that the tool is constantly being improved and updated, with new features and enhancements being added regularly. The tool's open-source nature also means that users have full access to the code, allowing them to modify and extend the tool to meet their specific needs. In terms of technical details, Jan is built using a combination of Rust and JavaScript, with the Tauri framework providing the foundation for the tool's cross-platform functionality. The tool's user interface is built using web technologies, including HTML, CSS, and JavaScript, which provides a flexible and customizable interface for users to interact with the tool. Overall, Jan is a powerful and flexible tool that offers a unique alternative to traditional chatbot solutions, with its offline capability, customization options, and community-driven development making it an attractive option for those who value privacy, security, and flexibility.

Pros & Cons

Pros

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Offline capability

+

Customization options

+

Community-driven development

+

Self-hosted solution

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Cross-platform compatibility

Cons

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Limited support for certain languages or use cases

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Requires technical expertise to customize or extend

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May require significant computational resources to run

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