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Coder vs EMQX

Coder logo

Coder

Developer Tools

Self-hosted platform for provisioning governed cloud development environments

From
Free
Free plan
Yes
Visit CoderFull review
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

The short version

  • Coder is free; EMQX starts at $234/mo.
  • Only Coder lists self-hosted workspaces; only EMQX lists erlang clustering.
  • Where Coder falls short: premium plan pricing is not published and requires contacting sales.
  • Prices and features on this page were last checked on 31 August 2026.

Where they differ

Only the attributes on which Coder and EMQX actually diverge.

Attributes where Coder and EMQX differ
AttributeCoderEMQX
Pricing modelFreemiumPer month by connection and session volume
PlatformsWeb, Linux, macOS, Windows, APILinux, Self-hosted, Web, macOS
CategoryDeveloper ToolsDatabases

Identical on both: starting price (Free), free tier (Yes).

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 Coder

  • Self-hosted workspaces
  • Multi-IDE support
  • AI coding agent support
  • OpenID Connect SSO
  • Audit logging
  • Resource quotas

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

What people use each for

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

Coder

  • Running self-hosted development environments behind a corporate firewallnot EMQX
  • Standardizing developer workspaces across a large engineering orgnot EMQX
  • Giving approved AI coding agents governed, isolated workspacesnot EMQX
  • Enforcing SSO and audit trails on developer environment accessnot EMQX

EMQX

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

Where each one falls short

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

Coder

  • Premium plan pricing is not published and requires contacting sales
  • Requires self-hosting and managing the underlying infrastructure, unlike fully managed cloud IDEs
  • High availability, audit logging, and RBAC are gated behind the paid Premium tier, so the free Community edition lacks enterprise controls

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

Pricing, plan by plan

Coder

Free
  • CommunityFree
    • Unlimited workspaces and templates
    • Unlimited organization members
    • Multiple IDE support
  • PremiumOn request
    • Ticket-based support with SLA
    • Multi-organization access controls
    • Resource quotas and audit logging

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

Which should you pick?

Choose Coder if

  • You need self-hosted workspaces.
  • You want to start without paying.
  • You work on Web, Linux, macOS, Windows, API.
  • You also want multi-ide support.
Coder review

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

Questions people ask

Is Coder or EMQX better?
Neither clearly leads. Coder starts at Free and EMQX at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Coder or EMQX?
Coder starts at Free and EMQX at Free.
Does Coder or EMQX run on more platforms?
Coder runs on Web, Linux, macOS, Windows, API. EMQX runs on Linux, Self-hosted, Web, macOS.
Can I use Coder for free?
Both have a free tier, so you can try either at no cost before committing.
What is Coder best used for?
Coder is most often used for running self-hosted development environments behind a corporate firewall, standardizing developer workspaces across a large engineering org, giving approved ai coding agents governed, isolated workspaces, enforcing sso and audit trails on developer environment access. Of those, running self-hosted development environments behind a corporate firewall and standardizing developer workspaces across a large engineering org are not what EMQX is typically brought in for.
What can Coder do that EMQX cannot?
Coder covers Self-hosted workspaces, Multi-IDE support, AI coding agent support, OpenID Connect SSO. EMQX covers Erlang clustering, MQTT 5.0 and QUIC, Rule engine, Data integration sinks.

Answered from the vendors’ own pages

Coder: Is there a free plan, and what are its limits?

Yes, the Community edition is free and includes unlimited workspaces, templates, and organization members with OpenID Connect SSO, aimed at hobbyists and small teams.

Source
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.

Coder: What does Premium add over Community?

Premium adds ticket-based SLA support, multi-organization access controls, resource quotas, audit logging, AI governance, workspace proxies, high availability, and custom branding.

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.

Coder: How is Coder priced?

Community is free; Premium is priced per user annually, with the exact rate available by contacting Coder.

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.

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.

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