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Developer Tools · head to head

Keil MDK vs WorkOS

Keil MDK logo

Keil MDK

Developer Tools

Microcontroller Development Kit for Arm-based devices

From
Free
Free plan
Yes
Full reviewWebsite
WorkOS logo

WorkOS

Cybersecurity

Developer platform for enterprise-ready authentication and identity.

From
$125/one-time per connection
Free plan
No
Full reviewWebsite

The short version

  • Only Keil MDK has a free tier, so it costs nothing to try first.
  • Each has a real cost: Keil MDK pricing for Essential and Professional subscriptions not disclosed on primary site; WorkOS authKit free tier limited to 1 million monthly active users; additional millions cost $2,500/month
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Keil MDK and WorkOS actually diverge.

Attributes where Keil MDK and WorkOS differ
AttributeKeil MDKWorkOS
Starting priceFree$125/one-time per connection
Pricing modelfreemiumusage-based
Free tierYesNo
PlatformsWebWeb, API
CategoryDeveloper ToolsCybersecurity

Identical on both: user rating (Not yet rated).

What people use each for

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

Keil MDK

  • Embedded software developmentnot WorkOS
  • ARM microcontroller programmingnot WorkOS
  • Professional development environmentsnot WorkOS

WorkOS

  • SaaS applications needing rapid enterprise SSO deploymentnot Keil MDK
  • Companies selling to mid-market and enterprise customersnot Keil MDK
  • Applications requiring SCIM directory sync with corporate identity systemsnot Keil MDK
  • Product teams needing audit logs for compliance (SOC 2, ISO 27001)not Keil MDK
  • Platforms with multiple identity provider requirementsnot Keil MDK

Where each one falls short

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

Keil MDK

  • Pricing for Essential and Professional subscriptions not disclosed on primary site
  • Customers must contact Arm Developer Tools store for subscription rates

WorkOS

  • AuthKit free tier limited to 1 million monthly active users; additional millions cost $2,500/month
  • Per-connection pricing for SSO and Directory Sync ($125–$50 each) scales poorly for enterprises with many identity providers
  • Audit logs require separate subscription at $125/month per SIEM connection or $99/month per 1 million events
  • Radar fraud protection billed separately at $100/month per 50,000 additional checks beyond 1,000 free checks
  • Custom domain feature requires $99/month subscription
  • Requires annual commitment for SLA and support guarantees; pay-as-you-go tier lacks uptime guarantee

Pricing, plan by plan

Keil MDK

Free

No published plan breakdown. See the Keil MDK review.

WorkOS

$125/one-time per connection
  • Pay as You Go$undefined/variable
    • Per-connection pricing from $125 to $50 with volume discounts
    • Up to 60% discount at scale
    • Quick deployment
  • Annual Credits$undefined/variable
    • Custom pricing with volume discounts
    • 99.99% uptime SLA
    • Guided migration

Which should you pick?

Choose Keil MDK if

  • You want to start without paying.
Keil MDK review

Choose WorkOS if

  • You work on Web, API.
WorkOS review

Questions people ask

Is Keil MDK or WorkOS better?
Neither clearly leads. Keil MDK starts at Free and WorkOS at $125/one-time per connection, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Keil MDK or WorkOS?
Keil MDK has a free tier; the other does not. Paid plans start at Free for Keil MDK and $125/one-time per connection for WorkOS.
Does Keil MDK or WorkOS run on more platforms?
Keil MDK runs on Web. WorkOS runs on Web, API.
Can I use Keil MDK for free?
Yes. Keil MDK has a free tier, so you can try it without paying. WorkOS starts at $125/one-time per connection.
What is Keil MDK best used for?
Keil MDK is most often used for embedded software development, arm microcontroller programming, professional development environments. Of those, embedded software development and arm microcontroller programming are not what WorkOS is typically brought in for.

Answered from the vendors’ own pages

Keil MDK: Does Keil MDK have a free version?

Yes, Keil MDK Community Edition is free for non-commercial projects. Essential and Professional editions are available as monthly or annual subscriptions.

Source
WorkOS: How quickly can I implement WorkOS SSO?

Developers can implement single sign-on in minutes instead of months. Multiple customers report setting up SSO in less than a week, with WorkOS handling the complexity of SAML and OIDC protocols.

Source
Keil MDK: How much do Keil MDK paid editions cost?

Specific pricing for Essential and Professional editions is not published on the main site. Rates are available from the Arm Developer Tools store or by contacting Arm sales.

Source
WorkOS: What SDKs does WorkOS provide?

WorkOS offers SDKs for Node.js, Python, Ruby, Go, PHP, Java, and .NET.

Source
WorkOS: Does WorkOS support SCIM provisioning?

Yes. WorkOS supports SCIM provisioning integration with systems like Okta and Entra ID for automated user management.

Source
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