Developer Tools · head to head
Keil MDK vs Zephyr Scale
Keil MDK
Developer Tools
Microcontroller Development Kit for Arm-based devices
- From
- Free
- Rated
- -
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; Zephyr Scale tightly bound to Jira; limited standalone functionality outside Jira ecosystem
Where they differ
Only the attributes on which Keil MDK and Zephyr Scale actually diverge.
| Attribute | Keil MDK | Zephyr Scale |
|---|---|---|
| Starting price | Free | On request |
| Pricing model | freemium | quote |
| Free tier | Yes | No |
| Category | Developer Tools | Testing |
Identical on both: platforms (Web), 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 Zephyr Scale
- ARM microcontroller programmingnot Zephyr Scale
- Professional development environmentsnot Zephyr Scale
Zephyr Scale
- Test case management within Jira workflowsnot Keil MDK
- Manual and automated test execution trackingnot Keil MDK
- Cross-project test asset reusenot Keil MDK
- Requirements traceability from stories to testsnot Keil MDK
- CI/CD pipeline and BDD framework integrationnot 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
Zephyr Scale
- Tightly bound to Jira; limited standalone functionality outside Jira ecosystem
- No-code automation features limited in Standard tier, expanded only in Advanced
- Data residency feature unavailable for Essential tier, limiting enterprise compliance
- Transparent cost structure not provided on marketing page
Pricing, plan by plan
Keil MDK
FreeNo published plan breakdown. See the Keil MDK review.
Zephyr Scale
On requestNo published plan breakdown. See the Zephyr Scale review.
Which should you pick?
Choose Zephyr Scale if
Nothing in the data separates Zephyr Scale from Keil MDK on the points above - pick on price and on how each one feels to use.
Questions people ask
- Is Keil MDK or Zephyr Scale better?
- Neither clearly leads. Keil MDK starts at Free and Zephyr Scale at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Keil MDK or Zephyr Scale?
- Keil MDK has a free tier; the other does not. Paid plans start at Free for Keil MDK and On request for Zephyr Scale.
- Does Keil MDK or Zephyr Scale run on more platforms?
- Both run on Web, so platform support will not decide this one for you.
- Can I use Keil MDK for free?
- Yes. Keil MDK has a free tier, so you can try it without paying. Zephyr Scale starts at On request.
- 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 Zephyr Scale 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.
SourceZephyr Scale: How much does Zephyr Scale cost?
Zephyr Scale pricing is not published on the website. Three tiers are available: Essential, Standard, and Advanced, plus QMetry for Jira. Contact SmartBear or visit Atlassian Marketplace for pricing details.
SourceKeil 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.
SourceZephyr Scale: Is there a free trial available?
Yes, Zephyr offers free trials for Essential, Standard, and Advanced tiers, as well as for QMetry. Visit the product page to start a trial.
SourceZephyr Scale: Does Zephyr Scale work outside of Jira?
Zephyr Scale is tightly integrated with Jira for test management. For standalone test management outside Jira, SmartBear offers QMetry as an alternative.
SourceRelated pages
More on Zephyr Scale
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