Onyx

Open-source enterprise search and AI assistant for company knowledge

About Onyx

Onyx is an open-source AI platform that connects to your enterprise knowledge and gives people and agents accurate, fast answers with complete context. It combines chat with any LLM, agents, web search, retrieval over documents, deep research and connectors to more than forty knowledge sources, and can run self-hosted entirely inside your own cloud or on-premises infrastructure with source permissions enforced at query time.

Onyx website preview

Live preview of onyx.app via the WordPress mShots service — it can take a few seconds to generate on a first visit.

Onyx: strengths & things to check

Strengths

Completely free to use — this directory lists no paid plan for it.
Covers enterprise search, rag, ai assistant, open source, self hosted — see the focus areas listed in its key facts.
Has 6 close alternatives in the same category on this page, so switching or comparing is easy.

Things to check

Free tools can change their model or shut down — avoid locking critical work into it without an export path.
Current plan prices are not listed here (they change too often to print reliably) — confirm the exact price on the official site.
It is one of 225 tools in the AI Chat & Assistants category here — compare it against the alternatives below before you commit.

Derived from this listing's own data (pricing model, focus areas and category) — not a hands-on review score.

Onyx pricing

Pricing model	Free — listed in this directory as a free tool, with no paid plan required to use it.
Free access	Yes — fully free
Current plan prices	Listed on the official site — prices change, so this directory links out instead of printing a number that may already be stale.
Official site	onyx.app

Onyx key facts

Category: AI Chat & Assistants
Pricing: Free — listed in this directory as a free tool, with no paid plan required to use it.
Focus areas: enterprise search, rag, ai assistant, open source, self hosted
Official site: onyx.app

Onyx FAQ

How much does Onyx cost?

Free — listed in this directory as a free tool, with no paid plan required to use it. Current plans and prices are listed on the official site (onyx.app).

What is Onyx used for?

Open-source enterprise search and AI assistant for company knowledge Its focus areas in the AI Chat & Assistants category: enterprise search, rag, ai assistant, open source, self hosted.

Where can I try Onyx?

On its official site, onyx.app — the Visit Official Site button above goes straight there.

Onyx vs alternatives

	Onyx	Open WebUI	LibreChat	ChatGPT
Pricing	Free — listed in this directory as a free tool, with no paid plan required to use it.	Free — listed in this directory as a free tool, with no paid plan required to use it.	Free — listed in this directory as a free tool, with no paid plan required to use it.	Freemium — a free tier lets you start, and paid plans are available if you need more.
Focus areas	enterprise search, rag, ai assistant, open source, self hosted	self hosted, open source, rag	self hosted, open source, multi model	chatbot, ai assistant, llm
Official site	onyx.app	openwebui.com	librechat.ai	chatgpt.com
Directory status	Listed	Listed	Listed	Featured listing

Side-by-side from each listing's own directory data. Full alternative cards are below.

About the AI Chat & Assistants category

Conversational AI assistants for writing, coding, research, and everyday questions. The AI Chat & Assistants category on Tools Hub currently lists 225 tools. Alongside Onyx, it includes Mammouth AI, Use AI, Lorka AI, Overchat AI.

FreeAI Chat & Assistantsenterprise-searchragai-assistantopen-sourceself-hosted

Alternatives to Onyx

Tools in the same AI Chat & Assistants category that share focus areas with Onyx — worth comparing before you commit:

AI Chat & Assistants

Open WebUI

Self-hosted AI platform with offline operation

Freeself-hostedopen-sourcerag

AI Chat & Assistants

LibreChat

Self-hosted multi-model chat platform

Freeself-hostedopen-sourcemulti-model

AI Chat & Assistants

ChatGPT

The world's most popular AI chatbot.

Freemiumchatbotai-assistantllm

AI Chat & Assistants

Claude

Anthropic's thoughtful AI assistant for writing, coding, and reasoning.

Freemiumchatbotai-assistantllm

AI Chat & Assistants

AnythingLLM

All-in-one local AI app for chatting with documents

Freedocumentsraglocal-llm

AI Chat & Assistants

Biel.ai

AI chatbot that answers from your technical documentation

Paiddocumentation-chatbotragdeveloper-docssupport-automation

More in AI Chat & Assistants

Comparing tools in the AI Chat & Assistants category? These related listings are worth a look: Mammouth AI — Get access to leading AI models in one place from €10/month; Use AI — The latest AI models in one app — switch models mid-chat without losing context; Lorka AI — All-in-one AI platform with multiple chat models in a single chat.