Is EMQX or Marqo better?

Neither clearly leads. EMQX starts at Free and Marqo at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, EMQX or Marqo?

EMQX has a free tier; the other does not. Paid plans start at Free for EMQX and On request for Marqo.

Does EMQX or Marqo run on more platforms?

EMQX runs on Linux, Docker, Kubernetes, Cloud, macOS. Marqo runs on Web API, SaaS.

Can I use EMQX for free?

Yes. EMQX has a free tier, so you can try it without paying. Marqo starts at On request.

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 Marqo is typically brought in for.

What can EMQX do that Marqo cannot?

EMQX covers Erlang clustering, MQTT 5.0 and QUIC, Rule engine, Data integration sinks. Marqo covers Semantic search, Multimodal image search, AI model training, Automated merchandising.

Databases · head to head

EMQX vs Marqo

EMQX

Databases

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

From: Free
Rated: -

Full review Website

Marqo

Databases

AI-native product discovery platform for ecommerce

From: On request
Rated: -

Full review Website

The short version

Only EMQX has a free tier, so it costs nothing to try first.
Each has a real cost: 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.; Marqo pricing not publicly available, enterprise sales-only model
They diverge on capability: EMQX covers Erlang clustering, Marqo covers Semantic search.
Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which EMQX and Marqo actually diverge.

Attributes where EMQX and Marqo differ
Attribute	EMQX	Marqo
Starting price	Free	On request
Pricing model	Per month by connection and session volume	contact-sales
Free tier	Yes	No
Platforms	Linux, Docker, Kubernetes, Cloud, macOS	Web API, SaaS
Founded	Unknown	2022

Identical on both: user rating (Not yet rated), category (Databases).

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 Marqo

Semantic search
Multimodal image search
AI model training
Automated merchandising
Multi-surface integration
Commerce platform integrations
API access

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 Marqo
An industrial operator routing sensor telemetry straight into TimescaleDB or Kafka without writing a consumer servicenot Marqo
An IoT product team that has outgrown a single Mosquitto instance and needs clustering and shared subscriptionsnot Marqo
A smart building deployment mixing MQTT, CoAP and LwM2M devices on one brokernot Marqo

Marqo

Improve search revenue for fashion and beauty retailersnot EMQX
Implement multimodal image and product searchnot EMQX
Increase checkout conversion through better product discoverynot EMQX
Create personalized product recommendationsnot EMQX
Reduce customer support inquiries with relevant search resultsnot 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.

Marqo

Pricing not publicly available, enterprise sales-only model
Requires custom implementation and integration work
Limited to ecommerce use cases compared to general search
Model training requires sufficient customer behavior data

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$234/month
- Single tenant cluster
- Traffic allowance included
- 24/7 support
Enterprise self-managed$undefined/year
- Deploy on premises, at the edge or in any cloud
- Clustering licensed
- 256 MB maximum message size

Marqo

On request

No published plan breakdown. See the Marqo review.

Which should you pick?

Choose EMQX if

You need erlang clustering.
You want to start without paying.
You work on Linux, Docker, Kubernetes, Cloud, macOS.
You also want mqtt 5.0 and quic.

EMQX review

Choose Marqo if

You need semantic search.
You work on Web API, SaaS.
You also want multimodal image search.

Marqo review

Questions people ask

Is EMQX or Marqo better?: Neither clearly leads. EMQX starts at Free and Marqo at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, EMQX or Marqo?: EMQX has a free tier; the other does not. Paid plans start at Free for EMQX and On request for Marqo.
Does EMQX or Marqo run on more platforms?: EMQX runs on Linux, Docker, Kubernetes, Cloud, macOS. Marqo runs on Web API, SaaS.
Can I use EMQX for free?: Yes. EMQX has a free tier, so you can try it without paying. Marqo starts at On request.
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 Marqo is typically brought in for.
What can EMQX do that Marqo cannot?: EMQX covers Erlang clustering, MQTT 5.0 and QUIC, Rule engine, Data integration sinks. Marqo covers Semantic search, Multimodal image search, AI model training, Automated merchandising.

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.

Marqo: How do Marqo models get trained?

Marqo trains dedicated AI models on each retailer's product catalog and customer behavior data including clicks, purchases, and browsing patterns. This ensures models are optimized for the specific retailer's products and customers.

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.

Marqo: What results can retailers expect from Marqo?

Enterprise retailers using Marqo report 10-23% increases in search revenue and conversion rates, with proven results across fashion, beauty, electronics, and home goods.

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.

Marqo: Which ecommerce platforms does Marqo integrate with?

Marqo has native integrations with Shopify, Adobe Commerce (Magento), and Salesforce Commerce Cloud, and also provides API access for custom implementations.

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.

Marqo: How is Marqo priced?

Marqo pricing is customized based on catalog size, search volume, and feature requirements. Contact their sales team to book a demo and discuss pricing.

Source

EMQX vs Marqo

EMQX

Marqo

The short version

Where they differ

What each one covers

Only in EMQX

Only in Marqo

What people use each for

EMQX

Marqo

Where each one falls short

EMQX

Marqo

Pricing, plan by plan

EMQX

Marqo

Which should you pick?

Choose EMQX if

Choose Marqo if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on EMQX

More on Marqo

Keep looking

Other head to heads