Claude Duet review: a proactive assistant that still asks before it acts
Anthropic opened a waitlist on October 21 for Claude Duet, an assistant that checks your email and calendar every few hours and messages you first. It's pitched at owners with too much to track. Whether it earns a place depends on what you let it reach.
Claude Duet is worth joining the waitlist for if you run a small business on a US Claude Pro or Max plan and most of your day lives in email and a calendar. It briefs, drafts and prepares work, and asks before it sends, pays, signs or deletes. Teams should wait: Team and Enterprise plans aren't included yet, Microsoft 365 isn't available, and its background checks use the same limits as the rest of Claude.
The verdict first
If you run a small business, you're on a Claude Pro or Max plan in the US, and your day is mostly email, calendar and documents, Claude Duet is worth a place on the waitlist. It's built to do the part of the job that eats your mornings: reading everything, deciding what matters, and getting a first draft ready.
If you're a team, wait. Anthropic opened Duet on October 21, 2026 as a research preview, and Team and Enterprise plans aren't included yet. Microsoft 365 isn't available either, which rules it out for a lot of offices on its own.
And whoever you are, the real decision isn't whether to try it. It's what you connect. An assistant that comes to you first is only as safe as the list of things you let it reach.
What Anthropic says it does
Here's the product as Anthropic describes it in its launch post, product page and help article, as of October 22.
Duet is a separate app on iOS and Android, and you can open it on claude.ai from a computer. It carries over the memory, skills and connected apps you've already set up in Claude, so there isn't much setup.
The difference from the regular Claude app is who starts the conversation. Duet checks your connected accounts every few hours and messages you when something needs you. Each morning it can send a brief from your email and calendar, flag what needs a reply, and start drafting. Anthropic says it checks at intervals rather than constantly because constant checking would use up your plan much faster.
It also works when you're not there. Duet has its own computer in the cloud with its own browser, so it keeps going after you close your laptop. Anthropic's examples are aimed squarely at owners: finding unpaid invoices and drafting the reminders, preparing payroll for you to review, getting contracts ready to send, and building a brief, a deck or a dashboard. Finished work comes back as files you can edit. Anthropic says it works with more than 6,000 connectors and plugins, including a small business plugin.
The part we like most is the approval line. Before Duet sends a message, makes a payment, signs a document or deletes anything, it shows you exactly what it's about to do and waits. Some things are off-limits even if you say yes, including trading securities and moving money between accounts.
An assistant that comes to you first is only as safe as the list of things you let it reach.
Where it falls short today
Anthropic is unusually direct about the limits, and they matter for a business.
It checks on a schedule. Something urgent can land between checks. If a customer emails at 9:05 and Duet looked at 9:00, you may hear about it hours later. Don't let it replace whatever currently tells you about urgent things.
You can't watch it work. You can't see its cloud browser or take it over. For sites without a connector it uses that browser, so you'll be judging the result rather than the steps.
It won't call or text people. With your approval it can send email from connected accounts, but it doesn't make phone calls or send texts to other people.
It can misjudge. Anthropic says Duet can misread a thread or get the urgency wrong, and that personal errands like booking tickets are weaker than work tasks. Read the drafts before you approve them, especially the ones going to customers.
It's not for shared work yet. No Team or Enterprise plans, Slack works with limits, and it can't change your work in Claude or see files on your computer.
Decision guide
Hand it the reading, keep the deciding
| Consideration | Let Duet do | Keep for yourself |
|---|---|---|
| Inbox | Morning brief, flag what needs a reply, draft it. | Read and send anything going to a customer. |
| Invoices | Find unpaid ones and draft reminders. | Check its list against your accounting system. |
| Contracts | Prepare the document and the email around it. | Read every clause and sign it yourself. |
| Money | Summarize what's due and when. | Any payment or transfer, whatever it offers. |
Price and plan
There's no separate price. During the research preview, Duet is included in Pro and Max and shares your plan's usage limits with the rest of Claude. That's the catch worth planning for. Its background checks count against those limits, and Anthropic says bigger jobs, like a financial model or a deck, take more model turns and more background work.
You also can't pick the model. Duet runs on Claude Opus 5.5 and decides for itself how much effort a job needs. In practice, if you already lean on Claude all day, expect Duet to compete with your own use for the same allowance. Start with a few small, frequent jobs and see how far your plan goes before you hand it anything big.
How it compares
The obvious comparison is OpenAI's Dots, which we reviewed in September: always-on ChatGPT agents with their own cloud computer and connections to thousands of apps. The shape is similar. The choice will mostly come down to which assistant you already pay for and where your connected apps and memory already live, because both products lean on that.
The other is Google's Gemini tools for small businesses, which we looked at this week. Gemini is strongest when your business runs on Google: Business Profile, Ads, Workspace, plus connections like Shopify. Duet is more of a general assistant that happens to understand owners' chores.
Our view is that none of these should be trusted with money movement or customer promises on day one, whichever logo is on it. The approval screen is the product. If you've already set up an AI assistant that could find the folder everyone forgot was shared, you know why.
What to connect first
Start narrow and widen on evidence. Here's the order we'd suggest.
Week one: read and draft only. Connect email and calendar. Let it send the morning brief and draft replies. Approve nothing to customers without reading it twice. Note what it got wrong.
Week two: one chore with a paper trail. Unpaid invoices are a good test, because the answer is checkable. Let it find them and draft reminders. Compare its list to your accounting system.
Later, maybe: documents that leave the building. Contracts and payroll prep only once you trust its drafts, and always with your own read before you sign or run anything.
Keep out, for now: banking, card-holding apps you can't revoke quickly, and anything that touches a customer record you'd struggle to put back. You can disconnect any app from Duet, so make a note of how.
If you're thinking about an assistant like this for your own team or your customers, built around your systems with the approval rules you actually need, that's the AI applications and agents work we do. Talk to us.
Related work: Spin:Market.
How the work moves
A cautious first month
- Week 1
Email and calendar only. Briefs and drafts. Log every mistake.
- Week 2
One checkable chore, such as unpaid invoices.
- Week 3
Review usage against your plan before adding bigger jobs.
- Week 4
Decide what to widen, what to keep out, and how to disconnect.
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