Free open source alternative app list about topic "Chat" :

Fullmoon

Key features Native macOS and iOS application built specifically for Apple platforms. Chat interface designed for interacting with large language models. Runs conversations locally on-device, keeping data private. Focused on privacy by avoiding cloud-based processing. Tailored experience on both Mac and iPhone/iPad. Platforms: macOS, iOS Links Official website Pricing: Free to download; closed-source proprietary app.

FreemacOSiOS

AnythingLLM

Key features Chat with your own documents using retrieval-augmented generation (RAG) and any supported LLM Desktop application with a single, unified interface for chatting, embedding, and managing vector storage Full support for local models, enabling fully offline and private use Works with a wide range of LLM providers, letting you swap models without changing your workflow Open source under the MIT license, giving you transparency and control over your data Platforms: Windows, macOS, Linux Links Official website Source code Pricing Fully free and open source under the MIT license, with optional paid cloud hosting tiers.

FreeWindowsmacOSLinux

LobeChat

Key features Open-source, modern AI chat interface for managing, building, and running AI agent teams. Works across multiple LLM providers, letting you switch or combine models in one place. Supports self-hosting for full control over your data and deployment. Extensible via plugins to add custom tools and capabilities. Rich feature set covering chat organization, agent management, and team workflows. Platforms: Windows, macOS, Linux Links Official website: https://lobehub.com/ Source code: https://github.com/lobehub/lobe-chat Pricing Free and fully open-source under Apache-2.0. You can self-host it or use the public demo.

FreeWindowsmacOSLinux

LibreChat

Key features Unifies multiple AI models — including OpenAI, Anthropic, and others — into a single conversation platform. Supports plugins to extend functionality. Enables sharing conversations and configurations. Self-hosted deployment for full control over your data and setup. Platforms: Windows, macOS, Linux Links Official website Source code repository Pricing Free. Fully free and open-source under the MIT license; self-host your own instance with no usage limits.

FreeWindowsmacOSLinux

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