OpenAltFinder

Best Self-Hosted AI Chat in 2026

Conversational AI assistants and chatbot tools for answering questions, generating content, and automating tasks.

The top-rated pick is Ollama with 178,192 GitHub stars.

5 self-hosted ai chat — ranked by GitHub stars. Browse all

Ollama

Ollama

Get up and running with Llama 3.3, DeepSeek-R1, Phi-4, Gemma 3, Mistral Small 3.1 and other large language models.

Alternative to:
ChatGPTChatGPT
Open WebUI

Open WebUI

User-friendly AI Interface (Supports Ollama, OpenAI API, ...)

Alternative to:
ChatGPTChatGPT
Lobe Chat

Lobe Chat

Open-source AI chat and agent platform with multi-provider support, RAG, plugins, and an agent marketplace — self-hostable ChatGPT alternative.

Alternative to:
ChatGPTChatGPT
Open Notebook

Open Notebook

Open-source, privacy-first alternative to Google NotebookLM with multi-model AI support, podcast generation, and self-hosting.

Alternative to:
NotebookLMNotebookLM
Onyx

Onyx

Onyx is an open-source AI chat and enterprise search platform with RAG that works with every LLM. Bring your own model and unify all your team's knowledge.

Alternative to:
GleanGlean

Why self-host?

Self-hosting puts you in control. You own your data, avoid vendor lock-in, and eliminate recurring subscription costs. For teams handling sensitive data or operating under strict compliance requirements, running your own infrastructure is often the only viable option.