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Developer Tools · head to head

Keil MDK vs Soketi

Keil MDK logo

Keil MDK

Developer Tools

Microcontroller Development Kit for Arm-based devices

From
Free
Rated
-
Full reviewWebsite
Soketi logo

Soketi

Developer Tools

Self-hosted, Pusher-compatible WebSockets server with a stalled maintenance record

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Keil MDK pricing for Essential and Professional subscriptions not disclosed on primary site; Soketi maintenance has effectively stalled: the maintainer has said time is severely limited, releases are infrequent, and the community has been discussing whether the project is abandoned, which means security fixes may not arrive.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

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

Attributes where Keil MDK and Soketi differ
AttributeKeil MDKSoketi
Pricing modelfreemiumOpen source, no licence fee
PlatformsWebLinux, macOS, Windows

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Developer Tools).

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 Soketi does not also cover.

Only in Soketi

  • Pusher protocol compatibility
  • Presence and private channels
  • Horizontal scaling
  • App management backends
  • Webhooks
  • Prometheus metrics

What people use each for

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

Keil MDK

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

Soketi

  • A Laravel application that already uses Echo and wants to stop paying a hosted realtime providernot Keil MDK
  • Realtime notifications or presence indicators where data must not leave your own infrastructure for compliance reasonsnot Keil MDK
  • A local or CI environment that needs a Pusher-compatible server without hitting a paid accountnot Keil MDK
  • A high-connection-count application where hosted per-connection pricing has become the largest line in the infrastructure billnot 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

Soketi

  • Maintenance has effectively stalled: the maintainer has said time is severely limited, releases are infrequent, and the community has been discussing whether the project is abandoned, which means security fixes may not arrive.
  • Dependency drift on Node and uWebSockets.js will eventually force you to fork or migrate, and that cost is unbudgeted at the point you adopt it.
  • There is no commercial support to buy, so a production incident at three in the morning is entirely your problem with no escalation path.
  • Scaling beyond a single node needs Redis and careful configuration, and getting presence channels correct across nodes is a genuine source of subtle bugs.
  • It implements the Pusher protocol rather than tracking it, so any protocol feature Pusher adds later will not appear, and the compatibility guarantee slowly decays.

Pricing, plan by plan

Keil MDK

Free

No published plan breakdown. See the Keil MDK review.

Soketi

Free
  • SoketiFree
    • MIT licensed
    • Unlimited connections subject to your own hardware
    • No vendor billing

Which should you pick?

Choose Keil MDK if

  • You want to start without paying.
Keil MDK review

Choose Soketi if

  • You need pusher protocol compatibility.
  • You want to start without paying.
  • You work on Linux, macOS, Windows.
  • You also want presence and private channels.
Soketi review

Questions people ask

Is Keil MDK or Soketi better?
Neither clearly leads. Keil MDK starts at Free and Soketi at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Keil MDK or Soketi?
Keil MDK starts at Free and Soketi at Free.
Does Keil MDK or Soketi run on more platforms?
Keil MDK runs on Web. Soketi runs on Linux, macOS, Windows.
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 Soketi is typically brought in for.
What can Keil MDK do that Soketi cannot?
Soketi covers Pusher protocol compatibility, Presence and private channels, Horizontal scaling, App management backends.

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
Soketi: Is Soketi still maintained?

Barely. The maintainer has stated that available time is very limited and releases have been sparse; treat it as community-maintained.

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
Soketi: Do I need to change my client code?

No. Pusher client SDKs and Laravel Echo work by changing the host, port and credentials.

Soketi: What does it cost?

Nothing in licence fees. It is MIT licensed; you pay for the server it runs on.

Soketi: What are people moving to?

Laravel Reverb for Laravel applications, and Sockudo, a Rust reimplementation, for others.

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