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Databases · head to head

Apache Kafka vs Medusa

Apache Kafka logo

Apache Kafka

Databases

Open-source distributed event streaming platform

From
Free
Rated
-
Full reviewWebsite
Medusa logo

Medusa

E-Commerce

Open source Shopify alternative

From
$29/month
Rated
-
Full reviewWebsite

The short version

  • Only Apache Kafka has a free tier, so it costs nothing to try first.
  • Each has a real cost: Apache Kafka operationally heavy to self-host: brokers, storage, rebalancing and upgrades are a standing job, which is why managed Kafka is a large market; Medusa the managed cloud meters four separate resources: edge requests, emails, compute hours and database storage
  • They diverge on capability: Apache Kafka covers Durable commit log, Medusa covers Open source.

Where they differ

Only the attributes on which Apache Kafka and Medusa actually diverge.

Attributes where Apache Kafka and Medusa differ
AttributeApache KafkaMedusa
Starting priceFree$29/month
Pricing modelOpen source, no licence fee; managed services billed separatelysubscription
Free tierYesNo
PlatformsLinux, Windows, macOS, Self-hosted, DockerWeb
CategoryDatabasesE-Commerce
FoundedUnknown2020

Identical on both: 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 Apache Kafka

  • Durable commit log
  • Horizontal scale
  • Kafka Connect
  • Kafka Streams
  • Replication
  • Low latency

Only in Medusa

  • Open source
  • Modular architecture
  • Multi-region support
  • Plugin system
  • Admin dashboard
  • Order management
  • Inventory tracking
  • Payment integrations

What people use each for

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

Apache Kafka

  • Moving events between services without point-to-point couplingnot Medusa
  • Feeding analytics and warehouses from operational systems in near real timenot Medusa
  • Replaying history to rebuild state after a consumer bugnot Medusa
  • Buffering bursty producers ahead of slower downstream systemsnot Medusa

Medusa

  • Building a custom ecommerce backend on an open source headless platformnot Apache Kafka
  • Running a self hosted or managed commerce API with a custom storefrontnot Apache Kafka

Where each one falls short

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

Apache Kafka

  • Operationally heavy to self-host: brokers, storage, rebalancing and upgrades are a standing job, which is why managed Kafka is a large market
  • Overkill for straightforward job queues, where a simpler broker is easier to run and reason about
  • Ordering guarantees hold per partition, not per topic, and getting partitioning wrong is a common and expensive design mistake
  • The ecosystem is fragmented across the Apache project and vendor distributions, so documentation and tooling advice often assume a particular distribution

Medusa

  • The managed cloud meters four separate resources: edge requests, emails, compute hours and database storage
  • The Develop plan at $29 a month applies a hard limit of 1,000 emails, so it stops rather than bills
  • Compute hours are capped at 600 on Develop and 800 on Launch
  • Edge request overage is $0.3 per million and storage $0.5 per GB month above the plan allowance
  • Background workers and priority support require the Scale plan at $299 a month

Pricing, plan by plan

Apache Kafka

Free
  • Apache KafkaFree
    • Full platform
    • Kafka Connect
    • Kafka Streams

Medusa

$29/month
  • Develop$29/month
    • Base cloud hosting
    • Commerce features included
    • No GMV-tax
  • Launch$99/month
    • Enhanced features
    • No GMV-tax
  • Scale$299/month
    • Advanced features
    • No GMV-tax
  • Enterprise$null/custom
    • Custom configuration

Which should you pick?

Choose Apache Kafka if

  • You need durable commit log.
  • You want to start without paying.
  • You work on Linux, Windows, macOS, Self-hosted, Docker.
  • You also want horizontal scale.
Apache Kafka review

Choose Medusa if

  • You need open source.
  • You also want modular architecture.
Medusa review

Questions people ask

Is Apache Kafka or Medusa better?
Neither clearly leads. Apache Kafka starts at Free and Medusa at $29/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Apache Kafka or Medusa?
Apache Kafka has a free tier; the other does not. Paid plans start at Free for Apache Kafka and $29/month for Medusa.
Does Apache Kafka or Medusa run on more platforms?
Apache Kafka runs on Linux, Windows, macOS, Self-hosted, Docker. Medusa runs on Web.
Can I use Apache Kafka for free?
Yes. Apache Kafka has a free tier, so you can try it without paying. Medusa starts at $29/month.
What is Apache Kafka best used for?
Apache Kafka is most often used for moving events between services without point-to-point coupling, feeding analytics and warehouses from operational systems in near real time, replaying history to rebuild state after a consumer bug, buffering bursty producers ahead of slower downstream systems. Of those, moving events between services without point-to-point coupling and feeding analytics and warehouses from operational systems in near real time are not what Medusa is typically brought in for.
What can Apache Kafka do that Medusa cannot?
Apache Kafka covers Durable commit log, Horizontal scale, Kafka Connect, Kafka Streams. Medusa covers Open source, Modular architecture, Multi-region support, Plugin system.

Answered from the vendors’ own pages

Apache Kafka: Is Apache Kafka free?

Yes. Kafka is open source under the Apache License v2 with no licence fee. Costs come from the infrastructure you run it on, or from a managed service such as Confluent Cloud.

Medusa: What does Medusa charge for additional team members?

Additional seats on the Medusa Cloud development platform cost $30 per seat per month. Unlimited users can access the Medusa Admin Dashboard at no additional cost for commerce operations.

Source
Apache Kafka: How is Kafka different from a message queue?

A queue usually removes a message once it is consumed. Kafka keeps an ordered, durable log, so consumers track their own position and history can be replayed — which is what makes rebuilding state after a bug possible.

Medusa: Are there usage-based charges beyond the base Medusa plan price?

Yes. Beyond base plan costs, Medusa charges for edge request overages at $0.30 per 1M requests, email overages at $0.70 per 1,000 emails, data transfer at $0.125 per GB, and database storage at $0.50 per GB-month.

Source
Apache Kafka: Who uses Kafka?

The project reports use by more than 80% of the Fortune 100, with over 5 million lifetime downloads.

Medusa: Can I cancel my Medusa subscription at any time?

Yes, users can cancel their Medusa subscription anytime. Plans are billed monthly in advance, with flex usage charges from the previous month added to the next invoice.

Source
Apache Kafka: Do I need to run Kafka myself?

No. Self-hosting is the operationally expensive option; managed services such as Confluent Cloud run the brokers for you and bill on throughput and storage instead.

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