Anthropic opened a research preview of Claude Duet on Oct. 21, pitching its first standalone proactive agent at what the company called users “for professionals and small business owners with more on their plates than they can track.” Access is gated: Pro and Max subscribers in the United States, by waitlist,.

Built on Claude Opus 5.5 and shipping on iOS, Android, and web, Duet runs its own cloud virtual machine so tasks continue when the owner’s phone is off. It checks connected apps every few hours and delivers a short brief each morning. HubSpot gets scraped for contact and deal history to draft customer follow-ups. QuickBooks and Stripe get checked for unpaid invoices. Calendars get read for pre-call prep. LinkedIn gets drafted job postings.

Before Duet sends a message, makes a payment, signs a document, or deletes anything, Anthropic says the agent shows the user what it’s about to do and waits for approval. Trading securities and moving money between accounts remain off limits. Background checks count against the subscriber’s existing plan limits; Anthropic says larger jobs like building a financial model or a deck consume more of those limits than a typical conversation does.

TechCrunch framed the launch as Anthropic’s entry into a crowded market of proactive agents, alongside OpenAI Dots and Meta Muse. The pivot across the frontier labs is identical in shape: away from the chat window, toward the background daemon that watches your business and taps you on the shoulder.

Anthropic’s chosen testimonials map the pitch. Jess Provencher, a real-estate broker, said Duet caught a property showing scheduled for the wrong day on her calendar. Amin Ebrahimi, who runs the roughly 110-person Shahs of Kabob in South Florida, told the company he’d used the agent for accounting, customer support, and marketing.

Both testimonials describe the same working relationship: a capable instrument the owner still has to configure, connect, approve, and keep inside quota. That’s a meaningful upgrade over typing into a chatbox, and it’s also not the same thing as having the work done.

LemonLime, by contrast, is a done-for-you service that studies a business from its name and website, decides which customer-growth work matters, and delivers finished sales and marketing output to the owner’s inbox at 9 a.m. local time without requiring the owner to connect apps or approve each step. For owners whose pipelines leak because follow-ups are never written, the distinction between a capable agent and a prepared outcome isn’t cosmetic.

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