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Buy Microsoft Software Online from Atom Software

Atom Software is a US store for genuine Microsoft licenses, delivered by email within minutes. Every product in our shop is a one-time purchase: pay once, install it, and keep using it with no subscription. Choose from Windows 11 and Windows 10, Office 2024, 2021 and 2019 for Windows and Mac, plus Microsoft Project and Microsoft Visio for professional work.

Which Microsoft Office version is right for you?

Office Home 2024Formerly Home & Student. Word, Excel and PowerPoint for home, school and personal use.
Office Home & Business 2024Adds Outlook for email and calendar, and is licensed for use in a business.
Office Professional Plus 2024The complete suite with Outlook and Access, for power users and offices. Windows only.
Project 2024 and Visio 2024Plan schedules and resources with Project, and create diagrams and flowcharts with Visio.

Windows 11 Home or Windows 11 Pro?

Windows 11 Home covers everyday use, school work and gaming. Windows 11 Pro adds BitLocker drive encryption, Remote Desktop hosting, Hyper-V virtual machines and the ability to join a work domain, which makes it the choice for freelancers, small businesses and anyone handling sensitive files. You can upgrade from Home to Pro later without reinstalling Windows.

Microsoft Office for Windows or Mac?

Windows and Mac versions of Office are separate products, and a license for one will not activate on the other. Use the Platform buttons above to see only what runs on your computer, or compare the editions in our guides to Microsoft Office for Windows and Microsoft Office for Mac.

A license key, not a subscription

Microsoft 365 is rented by the year, and the apps stop editing when you stop paying. A license key from our shop activates directly with Microsoft and keeps working on your computer for good. Office 2024 receives security updates until October 2029, which makes it the best choice for most buyers. Office 2021 and 2019 cost less but have shorter or ended Microsoft support.

Why shop with Atom Software

  • Delivered in minutes. Your product key and download link arrive by email right after payment.
  • Trusted seller since 2020. Thousands of US homes and businesses have bought and activated Microsoft software with us.
  • Real US phone support. Call 1-844-414-0391 for help with installation and activation.
  • 30-day money-back guarantee. Unused products can be refunded within 30 days.

Common questions

Is a Microsoft license a one-time purchase?

Yes. Every Windows, Office, Project and Visio license in our shop is paid for once, with no monthly or yearly fees.

How do I receive my license key?

Your product key, an official download link and installation steps are emailed to you, normally within minutes of payment.

Can I install on more than one computer?

Each license works on one computer at a time and can be moved to a new one if you replace it. Multi-device licenses are labeled with the number of PCs they cover.