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Keil MDK vs ProtonVPN

Keil MDK logo

Keil MDK

Developer Tools

Microcontroller Development Kit for Arm-based devices

From
Free
Free plan
Yes
Full reviewWebsite
ProtonVPN logo

ProtonVPN

Cybersecurity

High-speed Swiss VPN that safeguards your privacy

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: Keil MDK pricing for Essential and Professional subscriptions not disclosed on primary site; ProtonVPN free plan limited to one device at a time
  • Prices and features above were last checked on 30 August 2026.

Where they differ

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

Attributes where Keil MDK and ProtonVPN differ
AttributeKeil MDKProtonVPN
PlatformsWebWindows, macOS, Linux, iOS, Android
CategoryDeveloper ToolsCybersecurity
FoundedUnknown2014

Identical on both: starting price (Free), pricing model (freemium), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Keil MDK

Nothing recorded that ProtonVPN does not also cover.

Only in ProtonVPN

  • No-logs policy
  • Secure Core
  • Kill Switch
  • DNS leak protection
  • Tor over VPN
  • Split tunneling
  • NetShield ad-blocker
  • VPN Accelerator

What people use each for

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

Keil MDK

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

ProtonVPN

  • Privacy-focused browsing without subscription costnot Keil MDK
  • Multi-device protection with Plus plan supporting 10 devicesnot Keil MDK
  • Integrated access to Proton email and cloud services via Unlimited plannot 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

ProtonVPN

  • Free plan limited to one device at a time
  • Free plan restricted to 10 countries with random selection
  • Pricing amounts not clearly published; shown as variable

Pricing, plan by plan

Keil MDK

Free

No published plan breakdown. See the Keil MDK review.

ProtonVPN

Free

No published plan breakdown. See the ProtonVPN review.

Which should you pick?

Choose Keil MDK if

  • You want to start without paying.
Keil MDK review

Choose ProtonVPN if

  • You need no-logs policy.
  • You want to start without paying.
  • You work on Windows, macOS, Linux, iOS, Android.
  • You also want secure core.
ProtonVPN review

Questions people ask

Is Keil MDK or ProtonVPN better?
Neither clearly leads. Keil MDK starts at Free and ProtonVPN at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Keil MDK or ProtonVPN?
Keil MDK starts at Free and ProtonVPN at Free.
Does Keil MDK or ProtonVPN run on more platforms?
Keil MDK runs on Web. ProtonVPN runs on Windows, macOS, Linux, iOS, Android.
Can I use Keil MDK for free?
Both have a free tier, so you can try either at no cost before committing.
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 ProtonVPN is typically brought in for.
What can Keil MDK do that ProtonVPN cannot?
ProtonVPN covers No-logs policy, Secure Core, Kill Switch, DNS leak protection.

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
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
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