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Best API AI Chat UIs for self-hosting

The 6 best API ai chat uis you can self-host, ranked by community traction.

Open WebUI

Feature-rich self-hosted web interface for local LLMs

Replaces ChatGPT, Poe

★ 152.9k Easy setup BSD-3-Clause

NextChat

Lightweight, fast cross-platform AI chat application

Replaces ChatGPT

★ 88.8k Easy setup MIT

LibreChat

Enhanced ChatGPT clone supporting many AI providers

Replaces ChatGPT, Poe

★ 44.8k Medium setup MIT

big-AGI

Advanced AI suite with personas, beams, and multi-model chat

Replaces ChatGPT

★ 7.1k Easy setup MIT

RAGApp

No-code agentic RAG deployment in a Docker container

Replaces OpenAI Assistants

★ 4.4k Easy setup Apache-2.0

Open WebUI Pipelines

Plugin framework for extending self-hosted AI chat UIs

Replaces ChatGPT Plugins

★ 2.4k Medium setup MIT

Every option here is open-source and self-hostable, tagged API within the ai chat uis category. Compare them on the individual app pages for setup difficulty and resource requirements.