Softwr

Databases · head to head

EMQX vs WebStorm

EMQX logo

EMQX

Databases

Erlang MQTT broker for large IoT fleets, relicensed to BSL with production free use limited to one node

From
Free
Free plan
Yes
Visit EMQXFull review
WebStorm logo

WebStorm

Developer Tools

The JavaScript and TypeScript IDE

From
$12.9/month
Free plan
No
Visit WebStormFull review

The short version

  • WebStorm is a IDE for modern JavaScript development.
  • EMQX has a free plan, then $234/mo; WebStorm starts at $12.9/mo.
  • Only EMQX lists erlang clustering; only WebStorm lists smart JavaScript editor.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

Only the attributes on which EMQX and WebStorm actually diverge.

Attributes where EMQX and WebStorm differ
AttributeEMQXWebStorm
Starting priceFree$12.9/month
Pricing modelPer month by connection and session volumeSubscription
Free tierYesNo
PlatformsLinux, Self-hosted, Web, macOSWindows, macOS, Linux
CategoryDatabasesDeveloper Tools

Not yet recorded: founded for EMQX.

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 EMQX

  • Erlang clustering
  • MQTT 5.0 and QUIC
  • Rule engine
  • Data integration sinks
  • Session persistence
  • Multi protocol gateways
  • Authentication and authorisation
  • Dashboard and REST API

Only in WebStorm

  • Smart JavaScript editor
  • TypeScript support
  • Node.js development
  • Modern framework support
  • Built-in debugger
  • Unit testing
  • Version control
  • Live templates

What people use each for

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

EMQX

  • A connected vehicle platform needing millions of persistent MQTT sessions with QUIC for handover across mobile networksnot WebStorm
  • An industrial operator routing sensor telemetry straight into TimescaleDB or Kafka without writing a consumer servicenot WebStorm
  • An IoT product team that has outgrown a single Mosquitto instance and needs clustering and shared subscriptionsnot WebStorm
  • A smart building deployment mixing MQTT, CoAP and LwM2M devices on one brokernot WebStorm

WebStorm

  • Web application developmentnot EMQX
  • React/Angular/Vue developmentnot EMQX
  • Node.js backend developmentnot EMQX
  • TypeScript projectsnot EMQX
  • Frontend testingnot EMQX

Where each one falls short

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

EMQX

  • The move to Business Source Licence 1.1 at version 5.9 in May 2025 limits free production use to a single node, so the clustering that justifies choosing EMQX now requires a paid subscription from the second node onward
  • The relicensing arrived in a minor release, which caught users who had pinned to 5.x expecting Apache 2.0 terms and forced legal review of existing deployments
  • Running an Erlang/OTP cluster well requires operational knowledge most teams do not have, and diagnosing distribution, mnesia or memory issues means learning a runtime you use for nothing else
  • Enterprise pricing is quoted rather than published for the self-managed edition, so the cost of the clustered configuration you actually need is invisible until you talk to sales
  • The Serverless tier caps at around a thousand connections and shares infrastructure, which makes it a prototyping tier rather than a genuine small production option

WebStorm

  • JetBrains WebStorm is sold as an annual subscription rather than a one-time purchase: commercial price is $199 per year (USD), and personal price starts at $299 in year one, dropping to $239 in year two and $179 from year three onward with continuous renewal
  • If the subscription lapses, use of new versions stops; JetBrains grants a fallback license only for the last version used while the subscription was active, per its published buy page

Pricing, plan by plan

EMQX

Free
  • Open Source single nodeFree
    • BSL 1.1 licence since version 5.9
    • Free production use of one node only
    • All former enterprise features visible
  • ServerlessFree
    • Free monthly quota then pay as you go
    • Up to 1,000 connections
    • 8 by 5 support
  • Dedicated Flex$234/mo
    • Single tenant cluster
    • Traffic allowance included
    • 24/7 support
  • Enterprise self-managedOn request
    • Deploy on premises, at the edge or in any cloud
    • Clustering licensed
    • 256 MB maximum message size

WebStorm

$12.9/month
  • Individual$12.9/mo
    • Intelligent JavaScript & TypeScript editor
    • Debugging and testing
    • VCS integration
  • Organizations$25.9/mo
    • All Individual features
    • Commercial use license
    • Centralized license management

Which should you pick?

Choose EMQX if

  • You need erlang clustering.
  • You want to start without paying.
  • You work on Linux, Self-hosted, Web, macOS.
  • You also want mqtt 5.0 and quic.
EMQX review

Choose WebStorm if

  • You need smart javascript editor.
  • You work on Windows, macOS, Linux.
  • You also want typescript support.
WebStorm review

Questions people ask

Is EMQX or WebStorm better?
Neither clearly leads. EMQX starts at Free and WebStorm at $12.9/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, EMQX or WebStorm?
EMQX has a free tier; the other does not. Paid plans start at Free for EMQX and $12.9/month for WebStorm.
Does EMQX or WebStorm run on more platforms?
EMQX runs on Linux, Self-hosted, Web, macOS. WebStorm runs on Windows, macOS, Linux.
Can I use EMQX for free?
Yes. EMQX has a free tier, so you can try it without paying. WebStorm starts at $12.9/month.
What is EMQX best used for?
EMQX is most often used for a connected vehicle platform needing millions of persistent mqtt sessions with quic for handover across mobile networks, an industrial operator routing sensor telemetry straight into timescaledb or kafka without writing a consumer service, an iot product team that has outgrown a single mosquitto instance and needs clustering and shared subscriptions, a smart building deployment mixing mqtt, coap and lwm2m devices on one broker. Of those, a connected vehicle platform needing millions of persistent mqtt sessions with quic for handover across mobile networks and an industrial operator routing sensor telemetry straight into timescaledb or kafka without writing a consumer service are not what WebStorm is typically brought in for.
What can EMQX do that WebStorm cannot?
EMQX covers Erlang clustering, MQTT 5.0 and QUIC, Rule engine, Data integration sinks. WebStorm covers Smart JavaScript editor, TypeScript support, Node.js development, Modern framework support.

Answered from the vendors’ own pages

EMQX: Is EMQX still open source?

Not in the OSI sense since version 5.9. It is source-available under Business Source Licence 1.1, reverting to Apache 2.0 four years after each release.

WebStorm: Is there a free version of WebStorm?

Yes, WebStorm is free for non-commercial use and includes access to JetBrains AI with a free tier.

Source
EMQX: Can I run a free cluster?

No. The additional use grant permits free production use of one node; clustering requires a commercial licence.

WebStorm: What is the cost of a commercial WebStorm license?

The page references a testimonial mentioning 70 euros as a cost, though specific current pricing requires visiting the dedicated pricing page.

Source
EMQX: What changed for existing users?

Community and enterprise editions merged, so all features are now visible, but the licence terms tightened in the same minor release.

WebStorm: How does JetBrains AI licensing work?

Users can pay with JetBrains AI credits, bring their own AI subscriptions and API keys to avoid vendor lock-in, or use the free tier included with WebStorm.

Source
EMQX: Which version is still Apache 2.0?

Releases before 5.9 remain under Apache 2.0, and each BSL release converts to Apache 2.0 four years after publication.

WebStorm: What features does the free tier include?

The free tier includes the smart code editor, navigation tools, integrated developer tools, and customization options.

Source
Share

Related pages

More on EMQX

More on WebStorm

Keep looking

Other head to heads