Claude Duet for Small Business: The Phone Stays Yours

The short version: Claude Duet, the proactive agent Anthropic opened as a waitlisted research preview on October 21, is pitched at the back office of a small business: finding unpaid invoices and drafting the reminders, preparing payroll for you to review, sending a morning brief of what needs you. Anthropic’s own help article for Claude Duet, read on October 23, 2026, adds the limits the launch page leaves out. It “doesn’t make phone calls or send text messages to other people.” It checks your accounts “at set intervals, so something urgent can arrive between checks.” And “Microsoft 365 isn’t available yet,” even though a Microsoft and Office 365 logo sits in the connector strip on the Claude Duet product page. For a trades business, that splits the week cleanly: Duet can take the paperwork, and the phone stays yours.

Access is limited to US subscribers on Claude Pro, which costs $20 a month or $17 a month billed annually, and Claude Max, which starts at $100 a month, per Anthropic’s pricing page read October 23. Team and Enterprise plans are not included yet. There is no separate charge for Duet, but its background work draws on the same usage limits as every other Claude chat.

What is Claude Duet, in plain terms?

Duet is a separate app for iPhone and Android, also reachable on the web at claude.ai, that works on its own cloud computer rather than on your phone. You give it jobs by text or voice, and it keeps working after you close the app. Anthropic says it runs on Claude Opus 5.5, its top model, and you cannot switch it to a cheaper one. It brings along the memory, skills and connected apps from your existing Claude account, so it starts out knowing whatever you have already told Claude about your business.

The product page describes three kinds of work. A daily brief that flags what in your inbox and calendar needs attention and stays quiet otherwise. Tasks of different sizes, from scheduling a meeting to building a dashboard or a deck, reported back when done. And, in Anthropic’s words, “some of the work of running a business, like finding unpaid invoices and drafting the reminders,” plus “preparing payroll for you to review” and getting contracts ready to send.

That last sentence is the one that matters to an owner-operator. Anthropic has written the dull middle of a small business, receivables and payroll, into the main description of the assistant that runs on its top model, and connected it to the tools those jobs actually live in. The product page shows QuickBooks, Gusto, Stripe, Ramp, Docusign, HubSpot, Shopify, Gmail and Google Calendar among more than 6,000 connectors and plugins.

How does Duet decide when to look at your accounts?

It does not watch continuously. The help article says Duet checks your accounts at set intervals. Engadget’s launch coverage puts that at every few hours and quotes Anthropic’s reasoning: “checking nonstop would use up your plan’s limits much faster.” Engadget also reports that you will be able to choose how often Duet messages you and about what.

That design choice is honest, and it tells you what Duet is for. A check every few hours is fine for an overdue invoice, which is already days late. It is the wrong rhythm for a homeowner with water on the kitchen floor, who will call the next plumber on the list within minutes. Combine that with the rule that Duet does not call or text other people, and the conclusion is plain: Duet is not your answering service, and nobody should set it up as one.

If missed calls are what cost your shop money, that is a separate tool category, AI answering services such as Smith.ai, Goodcall or Rosie, which pick up in seconds. Duet’s job starts after the call, when the estimate, the invoice and the follow-up are sitting in your inbox.

What can a three-van trades shop actually hand Duet?

Take a common shape: an HVAC or plumbing business with three vans, the owner running one of them, a part-time office manager, books in QuickBooks, payroll in Gusto, email and calendar in Google Workspace. Here is how the help article’s rules sort that week.

Receivables, yes. Duet can look through QuickBooks for invoices past due, draft a reminder for each customer in your voice, and line them up. Sending them is one of the actions the help article says Duet will show you and wait on. If you are under a house when it asks, the article says it finishes the rest of the task and brings the approval back later, so the drafts are ready when you surface.

Payroll, as a draft. Anthropic’s wording is precise: payroll prepared “for you to review.” The owner still looks at hours and pay before anything runs. That is also where Anthropic’s own rules point. Its updated usage policy, which takes effect November 12, lists setting shifts, hours and pay as a high-risk use, and we walked through where the line sits between drafting that decision and making it in Anthropic’s new usage policy on shifts, hours and pay. Duet preparing payroll for your review is on the right side of that line. You approving it without looking would not be.

The morning brief, yes. For an owner who starts the day in a van, a short list of the three emails and two calendar conflicts that need an answer is the most immediately useful thing on the list. It is also where the time savings are easiest to measure: if the brief replaces twenty minutes of scrolling before the first job, that is time back every day.

Moving money, no. The help article is direct: “Some actions are off-limits even with your approval, such as trading securities, moving money between accounts.” Duet can make a payment once you approve it, but shifting cash between your operating and tax accounts stays with you. It also cannot get into someone else’s account, even with your say-so.

Your office manager’s inbox, no. Duet works through the apps you connect yourself, and the help article says it cannot access someone else’s account. With Team plans not yet included, there is no shared office version for now, so the office manager’s inbox stays the office manager’s.

Does Claude Duet work with Outlook and Microsoft 365?

Not yet. This is the single most practical fact for many small businesses, and it is on the help page, not the launch page. The product page’s connector strip includes a logo labeled “Microsoft / Office 365.” The help article, read the same day, says plainly: “Microsoft 365 isn’t available yet.”

A shop that runs its email and calendar on Outlook and Microsoft 365 would get a Duet with no inbox and no calendar to read, which removes most of what the morning brief is for. If that is you, the waitlist is worth joining for when the connector arrives, not for what it can do on day one. The working examples in the help article are Gmail, Google Calendar, Google Drive, Slack, QuickBooks, HubSpot, Docusign and Calendly.

How much of your Claude plan does Duet use?

The help article says Duet uses the same five-hour session limit and weekly limit as your chats, at the same rate, and that background work such as the morning brief and the check-ins counts too, so “you may hit limits sooner.” Anthropic does not publish how much a check-in costs in usage, so nobody can honestly tell you how many reminders a Pro plan covers. What it does publish: anyone admitted to the preview gets one full limit reset, available until November 30, 2026.

That reset is the practical opening. If you get in, use it as a trial with a fixed scope: connect only email, calendar and your accounting tool, run it for two weeks, and see whether the brief and the invoice drafts are worth it before you consider moving from $20 to a $100 Max plan. If you already use Claude heavily for writing quotes or marketing copy, expect Duet to compete with that work for the same allowance.

What happens to your passwords and data?

When Duet needs a website that has no connector, it uses its own cloud browser, and the help article says you type passwords into a separate form designed to keep them out of your chat with Duet. You cannot watch Duet work in that browser or take it over, which is worth knowing before you point it at a supplier portal or a bank’s website. You start every connection yourself and can disconnect any app at any time; disconnecting stops future access, but the help article says Duet keeps its memory of earlier conversations.

Duet can also search your past Claude chats under the “Search and reference chats” setting, which you can switch off. If you have used Claude to draft something sensitive about an employee or a customer, that is the setting to look at first.

Is Duet worth joining the waitlist for?

For a Google Workspace shop that already pays for Claude Pro, yes, and the reason is not novelty. The back office is where owner-operators lose their evenings, and Duet is an assistant from a major lab that names those jobs, connects to the tools they live in, and keeps the owner’s hand on every send, payment and signature. That combination gives the owner hours back without taking the owner out of the decisions, which is what AI should do for a small business.

Go in with the right job description. Duet is a back-office assistant that checks in every few hours, not a front desk. It will misread a thread sometimes, and the product page says so, so read its drafts before you approve them; our look at how often AI agents claim finished work that is not finished explains why the review step is not a formality. Meta’s rival takes a different approach to permissions, which we covered in Muse for Small Business approvals, and our guide to AI tools by the job you need done covers the answering services that handle the phone.

Frequently Asked Questions

How much does Claude Duet cost?

There is no separate price. Duet is a waitlisted research preview for US subscribers on Claude Pro, at $20 a month or $17 a month billed annually, and Claude Max, from $100 a month, per Anthropic’s pricing page on October 23, 2026. Its background work counts against the same usage limits as your other Claude chats.

Can Claude Duet answer phone calls or text customers?

No. Anthropic’s help article says Duet does not make phone calls or send text messages to other people, and it checks your accounts at set intervals rather than continuously. For missed calls, a dedicated AI answering service is the right tool; Duet handles the paperwork that follows.

Does Claude Duet work with Microsoft 365 or Outlook?

Not yet. The help article says Microsoft 365 isn’t available yet, even though a Microsoft and Office 365 logo appears among the connectors on the product page. Gmail, Google Calendar, Google Drive, Slack, QuickBooks, HubSpot, Docusign and Calendly are the examples the help article gives.

Can Claude Duet pay bills or run payroll on its own?

No. Duet waits for your approval before sending a message, making a payment, signing a document or deleting anything, and moving money between accounts is off-limits even with approval. Anthropic describes payroll as prepared for you to review, so the owner still checks hours and pay before anything runs.

If Duet could take one back-office job off your plate tomorrow, which would you hand it first: the overdue invoices, the payroll prep or the morning inbox? Tell us in the comments.