Listed Microsoft AppSource partner

Genuine Microsoft license keys, delivered to your inbox in minutes

Windows 11, Windows 10, Office 2024/2021 and Windows Server at up to 70% off retail. One-time payment, lifetime activation, and a 180-day money-back guarantee on every key.

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  • 100% genuine keys
  • Instant email delivery
  • 180-day money-back
  • 4.9/5 average customer rating

Best sellers today Up to 75% off

WindowsWindows 11, 10 & 7 — Home, Pro, Enterprise→ Microsoft OfficeOffice 2024, 2021, 2019 & for Mac→ Office appsVisio, Project, Access, Word, Outlook→ Windows ServerServer 2025 & 2022 — Standard, Datacenter→

Best-selling Microsoft license keys

Our most-ordered keys — every one genuine, activated for life and delivered by email.

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How it works

From checkout to activation in three steps — no shipping, no waiting.

Choose your product

Pick the Windows edition, Office suite or Server license you need. Not sure which one? Email us and we’ll point you to the right key.

Pay securely

Check out with Visa, Mastercard, American Express, Apple Pay or Google Pay. Payments are encrypted with SSL — we never store card details.

Receive your key by email

Your license key, download link and step-by-step installation guide arrive in your inbox within minutes. Activate and you’re done.

Windows 11 & Windows 10 product keys

Home, Pro, Pro N, Enterprise and Workstation editions — one key, one PC, lifetime activation.

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Microsoft Office 2024, 2021 & 2019

Perpetual Office suites for Windows and Mac — no subscription, ever.

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100% genuine Microsoft softwareEvery key is sourced from authorised Microsoft distributors and activates on Microsoft’s own servers.
Delivered in minutesDigital delivery to your email right after payment — including the download link and installation guide.
Lifetime activationOne-time purchase. Your license never expires and includes all official Microsoft updates.
180-day money-back guaranteeIf a key doesn’t activate, our support team replaces it or refunds you — 7 days a week.

Buy with confidence — we’re a listed Microsoft AppSource partner

OfficeGSM is operated by Makers Unity LLC in the United States. Every license we sell is genuine and covered by our 180-day money-back guarantee, backed by real people on email and phone from Monday to Friday, 9am–6pm Eastern.

  • Verified Microsoft partner profile on AppSource
  • Secure SSL checkout — Visa, Mastercard, Amex, Apple Pay, Google Pay
  • Free installation help and activation support
  • Bulk and business licensing available on request

Questions before you buy?

Straight answers about delivery, activation and refunds.

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How fast will I receive my license key?

Immediately after your payment is confirmed. The key, download link and installation instructions are sent to the email address you used at checkout — usually within a few minutes.

Are your Microsoft keys genuine?

Yes. We only sell 100% authentic Microsoft software. Every key activates directly on Microsoft’s servers and receives all official updates, backed by a lifetime warranty.

Why are your prices lower than retail?

We buy directly from Microsoft wholesalers and sell digital-only, so there are no boxes, shipping costs or middlemen. Those savings go to you.

What if the key doesn’t activate?

Contact our support team. We’ll help you activate it or replace the key; if it still can’t be activated, you get a refund under our 180-day money-back guarantee.

Which payment methods do you accept?

Visa, Mastercard, Maestro, American Express, Discover, Diners Club, Apple Pay and Google Pay. All payments are secured with SSL encryption.

Can I get help with installation?

Of course. Installation instructions come with every order, and our support team is available by email or phone if you need a hand.