Onyx: Open-Source Enterprise Search That Beat ChatGPT

You know that feeling when you KNOW the answer exists somewhere — in a Slack thread from 3 months ago, a Confluence page you can't find, or a Google Doc someone shared last year — but you spend 30 minutes digging and still come up empty? Your company's knowledge is scattered across 50+ tools, search bars are useless, and you end up asking the same questions in Slack over and over. New hires spend weeks just figuring out where information lives.

Onyx connects to your workplace tools (Slack, GitHub, Google Drive, etc.) and indexes everything into a unified search system. When you ask a question, it uses hybrid search — combining keyword matching with vector embeddings — to find relevant documents, then feeds those to an LLM to generate an answer with citations. Think of it like this: instead of searching each app separately, you have one assistant who has read everything and can synthesize answers across all your sources. The permission system ensures you only see results from documents you actually have access to.

• 50+ Connectors — why YOU care: Connect Slack, GitHub, Google Drive, Confluence, Notion, Jira, and 40+ more tools in minutes. Stop context-switching between 10 different search bars.
• Deep Research — why YOU care: Ask complex questions like 'Why did we lose the Acme deal?' and Onyx searches across calls, emails, tickets, and docs to build you a comprehensive answer. Beats ChatGPT Enterprise head-to-h...
• Permission-Aware Search — why YOU care: Respects your existing access controls. If you can't see a Google Doc normally, you won't see it in Onyx results. No compliance headaches.
• Self-Host or Cloud — why YOU care: Run it on your own infrastructure for full data control, or use their cloud for zero setup. Your choice, same product.
• Any LLM Provider — why YOU care: Works with OpenAI, Anthropic, Google Gemini, or self-hosted models via Ollama/LiteLLM. Not locked into one vendor.
• Slack Integration — why YOU care: Get answers directly in Slack channels. Tag @Onyx and it responds with sourced answers. No app-switching.
• Onyx Lite Mode — why YOU care: Run with <1GB memory for smaller teams or testing. Full features, lighter footprint.

Who It Is For

If you're an engineer who spends too much time hunting for documentation, or a team lead tired of answering the same questions repeatedly, this is for you. Perfect for companies with knowledge scattered across Slack, GitHub, Google Drive, and Confluence. Not useful if you're a solo developer or your team uses fewer than 5 tools — the overhead isn't worth it.

Worth Exploring?

Yes, if you need enterprise knowledge retrieval and want self-hosting. The benchmark wins are impressive (64-73% against major competitors), the $10M funding suggests staying power, and 25K+ GitHub stars indicate real community traction. Production-ready with companies like Ramp already using it at scale. Start with Onyx Lite to test — you can spin it up in 10 minutes with Docker. Skip if you need Windows-first deployment (some connector issues reported) or if you're happy paying Glean's enterprise pricing.