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Cybersecurity · head to head

Keygen vs Microsoft Defender

Keygen logo

Keygen

Cybersecurity

Open, source-available software licensing API

From
Free
Rated
-
Full reviewWebsite
Microsoft Defender logo

Microsoft Defender

Cybersecurity

Always-on protection for you and your family's data and devices

From
$12/month
Rated
-
Full reviewWebsite

The short version

  • Only Keygen has a free tier, so it costs nothing to try first.
  • Each has a real cost: Keygen specific Active Licensed User (ALU) pricing not listed; requires interactive pricing calculator; Microsoft Defender defender Suite requires existing Microsoft 365 E3 or equivalent base licensing
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Keygen and Microsoft Defender actually diverge.

Attributes where Keygen and Microsoft Defender differ
AttributeKeygenMicrosoft Defender
Starting priceFree$12/month
Pricing modelusage-basedsubscription
Free tierYesNo

Identical on both: platforms (Web), user rating (Not yet rated), category (Cybersecurity).

What people use each for

The jobs each tool is most often brought in to do.

Keygen

  • Software licensing and distributionnot Microsoft Defender
  • Product release managementnot Microsoft Defender
  • API-based license verificationnot Microsoft Defender

Microsoft Defender

  • Endpoint security and threat protectionnot Keygen
  • Identity and access securitynot Keygen
  • Email threat protectionnot Keygen
  • SaaS application security monitoringnot Keygen

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Keygen

  • Specific Active Licensed User (ALU) pricing not listed; requires interactive pricing calculator
  • Whitelabel API add-on costs $995/year per domain

Microsoft Defender

  • Defender Suite requires existing Microsoft 365 E3 or equivalent base licensing
  • Some Defender products use pay-as-you-go pricing with variable costs
  • Prices vary based on Microsoft agreements, requiring sales contact for custom quotes

Pricing, plan by plan

Keygen

Free
  • DevFree
    • Up to 100 Active Licensed Users
    • 10 product releases
    • Core licensing API only
  • Std$null/month
    • Scaling with licensing volume
    • Distribution API (OCI/Docker, npm, Rubygems, PyPI, Tauri)
    • Flat monthly/yearly fees
  • Enterprise$null/month
    • Audit logs
    • SAML/SSO
    • IP filtering

Microsoft Defender

$12/month
  • Microsoft Defender Suite$12/month
    • Endpoint protection
    • Identity threat detection
    • Email security
  • Microsoft 365 E5 with Defender$60/month
    • Includes Defender Suite
    • Microsoft Teams included
    • Comprehensive security and compliance
  • Microsoft Defender Vulnerability Management Add-on$2/month
    • Vulnerability scanning and management
    • One-month free trial available
    • Annual commitment required

Which should you pick?

Choose Keygen if

  • You want to start without paying.
Keygen review

Choose Microsoft Defender if

Nothing in the data separates Microsoft Defender from Keygen on the points above - pick on price and on how each one feels to use.

Microsoft Defender review

Questions people ask

Is Keygen or Microsoft Defender better?
Neither clearly leads. Keygen starts at Free and Microsoft Defender at $12/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Keygen or Microsoft Defender?
Keygen has a free tier; the other does not. Paid plans start at Free for Keygen and $12/month for Microsoft Defender.
Does Keygen or Microsoft Defender run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use Keygen for free?
Yes. Keygen has a free tier, so you can try it without paying. Microsoft Defender starts at $12/month.
What is Keygen best used for?
Keygen is most often used for software licensing and distribution, product release management, api-based license verification. Of those, software licensing and distribution and product release management are not what Microsoft Defender is typically brought in for.

Answered from the vendors’ own pages

Keygen: Does Keygen have a free tier?

Yes, the Dev tier is free and supports up to 100 Active Licensed Users with 10 product releases and core licensing API access.

Source
Microsoft Defender: How much does Microsoft Defender Suite cost?

Microsoft Defender Suite costs $12/user/month (paid yearly), but requires existing Microsoft 365 E3 or equivalent base licensing. It includes endpoint protection, identity threat detection, email security, and SaaS application monitoring.

Source
Keygen: How is Keygen pricing calculated?

Keygen uses scalable, flat monthly or yearly fees based on your licensing volume (Active Licensed Users). No revenue share or transaction fees are charged.

Source
Microsoft Defender: What add-ons are available for Microsoft Defender?

Microsoft Defender Vulnerability Management Add-on costs $2/user/month with annual commitment and includes a one-month free trial. Additional pay-as-you-go products include External Attack Surface Management, Cloud Security Posture Management, and Sentinel.

Source
Keygen: Does Keygen charge for additional features like SSO?

SAML/SSO is included in Enterprise tiers. Whitelabel API support costs $995/year per domain. Premium Support SLA is $995/month for Enterprise.

Source
Microsoft Defender: Is Defender included in Microsoft 365 E5?

Yes, Microsoft Defender Suite is included in Microsoft 365 E5 at $60/user/month (paid yearly with Teams). Prices may vary based on Microsoft agreements, requiring contact with Sales for customized quotes.

Source
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