SigmaDomain

A massive AI toolkit marketplace, powered by Claude

Thousands of ready-to-use tools are already here — just ask, and Sigma Domain picks the right ones and does the work. It's powered by Claude, the AI behind the world's best coding agents. Run expert skills, build live maps with your team, and turn any drive into a narrated audio tour. Want a sanity check? Tap the 🧠 to get a second opinion from 70+ other leading models.

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2nd opinions from 70+ models

Post your own tools. Use everyone else's.

Most AI apps are just chat. Sigma Domain has a marketplace of thousands of ready-to-use tools — and you can register and publish your own functions, APIs, and integrations, public or private. Your tools become part of the AI's toolkit, callable in plain English by you, your team, or anyone you share them with.

What you can do today

🎧 AI Tour GuideStart a tour and Sigma Domain narrates the places you pass — the history, the architecture, the stories — spoken aloud as you drive or walk. Like a private radio station for wherever you are.
🛠️ A toolkit you can add toBrowse thousands of tools or post your own. Register functions, APIs, and services once — then anyone you allow can use them right from chat.
🗺️ Live maps you build togetherSearch properties and places, pin and compare them on a shared map, vote with your team, and generate reports — commute times included.
📚 SkillsExpert playbooks the AI can load on demand — Word, PowerPoint, Excel, and PDF creation and editing, and more — so answers become finished documents.
⚡ AI JobsHand off multi-step work. The AI plans the steps, calls your tools, and reports back when it's done.
🧠 Second opinions on tapThe main conversation runs on Claude. One tap consults a different model — from a catalog of 70+ including OpenAI, Meta, Mistral, DeepSeek, and Amazon — and summarizes where they agree or differ.

Explore Sigma Domain

ToolsAdd an API from any source and call it in plain conversation. Sigma Domain reads the spec, handles auth and parameters, and puts every connected tool one sentence away.
Publish toolsPut your API in the Sigma Domain toolkit marketplace, set a price per call, offer a free allowance, and get paid when people use it. Usage metering and billing are handled for you.
Private appsHosted web apps that only you and the people you invite can open. Shared maps and location-aware audio tours run this way today, with data kept in your own private database.
Group chatInvite people into the same conversation and work with Claude together, live. Everyone sees the same thread, the same tool calls and the same results as they happen.
Your dataEvery Sigma Domain account gets its own database and file storage. Ask for what you want in plain language. Access is scoped per user, so the assistant only ever sees your files.
DocumentsAsk for a document and get a real .docx, .xlsx or .pptx. Edit it in the browser or on your phone without leaving Sigma Domain, then download, host or share it.
DocsGuides for every part of Sigma Domain: registering your own API as a tool, the personal database, document editing, jobs, models and settings.
PlansTry Sigma Domain as a guest with no account. Free accounts keep your data. Standard is $5 a month for higher limits and pay-as-you-go beyond them. See what each plan includes.
Get the appSigma Domain runs in any browser, as an iOS and Android app, and as a desktop app for macOS and Windows. Your conversations, files and tools follow you across all of them.
TeamWho builds Sigma Domain, and how to reach us.
InvestorsInformation for prospective investors in Sigma Domain. Detailed materials are available after signing a non-disclosure agreement.

Have tools or data of your own?

Share your stack and we'll help you register it in Sigma Domain — so your team, your customers, or the whole marketplace can put it to work through one conversation.

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