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Cloud · head to head

Azure Functions vs Portworx

Azure Functions logo

Azure Functions

Cloud

Event-driven serverless compute on Azure

From
Free
Rated
-
Full reviewWebsite
Portworx logo

Portworx

Cloud

Kubernetes-native storage and data services, priced by the node hour

From
$0.33/node hour
Rated
-
Full reviewWebsite

The short version

  • Only Azure Functions has a free tier, so it costs nothing to try first.
  • Each has a real cost: Azure Functions consumption plan free grant is capped at 1 million executions and 400,000 GB-seconds of resource consumption per month per subscription, billed per GB-second beyond that; Portworx bare metal nodes are charged at 1.11 USD per node hour against 0.33 for virtual nodes, so a bare metal cluster costs more than three times a virtualised one for identical capability.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Azure Functions and Portworx actually diverge.

Attributes where Azure Functions and Portworx differ
AttributeAzure FunctionsPortworx
Starting priceFree$0.33/node hour
Pricing modelusage-basedPer node hour
Free tierYesNo
PlatformsWebLinux

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

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 Azure Functions

Nothing recorded that Portworx does not also cover.

Only in Portworx

  • Container-native volumes
  • Failure domain placement
  • Volume encryption
  • Database automation
  • Disaster recovery
  • Autopilot capacity management
  • Hardware independence

What people use each for

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

Azure Functions

  • Event-driven computingnot Portworx
  • Serverless application backendnot Portworx
  • Scalable API endpointsnot Portworx

Portworx

  • Running a production PostgreSQL or Cassandra cluster on Kubernetes and needing the data to survive node lossnot Azure Functions
  • A platform team offering self-service databases to developers on an internal Kubernetes platformnot Azure Functions
  • Failing over stateful applications between clusters in different regions as a disaster recovery positionnot Azure Functions
  • An OpenShift estate where the built-in storage option does not meet the availability requirement for stateful setsnot Azure Functions

Where each one falls short

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

Azure Functions

  • Consumption plan free grant is capped at 1 million executions and 400,000 GB-seconds of resource consumption per month per subscription, billed per GB-second beyond that
  • The newer Flex Consumption plan's free grant is smaller still, at 250,000 executions and 100,000 GB-seconds per month
  • Premium plan avoids per-execution charges but bills continuously for allocated core seconds and memory regardless of invocation volume
  • Memory is rounded up to the nearest 128 MB and execution time to the nearest 1 ms for billing, so small overages round upward

Portworx

  • Bare metal nodes are charged at 1.11 USD per node hour against 0.33 for virtual nodes, so a bare metal cluster costs more than three times a virtualised one for identical capability.
  • A 1,000 node hour monthly minimum applies, which means small or intermittent clusters pay for capacity they do not consume.
  • Replicating volumes across nodes consumes real capacity and network bandwidth, so the underlying infrastructure cost rises alongside the licence in a way the node hour rate does not show.
  • Pure Storage ownership means roadmap priorities are set by an array vendor, and buyers should confirm that hardware independence remains contractual rather than assumed.
  • Operating it well requires Kubernetes storage expertise, and teams that adopted Kubernetes to simplify operations often find they have added a distributed storage system to run.

Pricing, plan by plan

Azure Functions

Free
  • Consumption Plan$null/month
    • 1 million requests free monthly
    • 400,000 GB-seconds free monthly
    • Billed per second and executions
  • Flex Consumption Plan$null/month
    • 250,000 executions free monthly
    • 100,000 GB-seconds free monthly
    • Event-driven scaling
  • Premium Plan$null/month
    • No execution charges
    • At least one instance required
    • Includes automatic scaling and VNET access

Portworx

$0.33/node hour
  • Portworx Enterprise on virtual machine nodes$0.33/node hour
    • Minimum 1,000 node hours per month
    • Replicated persistent volumes
    • Encryption and disaster recovery
  • Portworx Enterprise on bare metal nodes$1.11/node hour
    • Minimum 1,000 node hours per month
    • Same capabilities on bare metal clusters
    • Higher rate reflects node density

Which should you pick?

Choose Azure Functions if

  • You want to start without paying.
Azure Functions review

Choose Portworx if

  • You need container-native volumes.
  • You work on Linux.
  • You also want failure domain placement.
Portworx review

Questions people ask

Is Azure Functions or Portworx better?
Neither clearly leads. Azure Functions starts at Free and Portworx at $0.33/node hour, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Azure Functions or Portworx?
Azure Functions has a free tier; the other does not. Paid plans start at Free for Azure Functions and $0.33/node hour for Portworx.
Does Azure Functions or Portworx run on more platforms?
Azure Functions runs on Web. Portworx runs on Linux.
Can I use Azure Functions for free?
Yes. Azure Functions has a free tier, so you can try it without paying. Portworx starts at $0.33/node hour.
What is Azure Functions best used for?
Azure Functions is most often used for event-driven computing, serverless application backend, scalable api endpoints. Of those, event-driven computing and serverless application backend are not what Portworx is typically brought in for.
What can Azure Functions do that Portworx cannot?
Portworx covers Container-native volumes, Failure domain placement, Volume encryption, Database automation.

Answered from the vendors’ own pages

Azure Functions: Does Azure Functions have a free tier?

Yes, Azure Functions includes a monthly free grant of 1 million requests and 400,000 GB-seconds on the Consumption Plan, or 250,000 executions and 100,000 GB-seconds on Flex Consumption.

Source
Portworx: Is Portworx tied to Pure Storage hardware?

No. It runs on any Kubernetes distribution over any underlying storage, though Pure has owned it since 2020 and sets the roadmap.

Azure Functions: What is Azure Functions' pricing model?

Azure Functions uses usage-based pricing. Consumption plans charge per second of resource consumption and per execution, measured in gigabyte-seconds and rounded to the nearest 128 MB.

Source
Portworx: What does a real cluster cost?

At 0.33 USD per virtual node hour, twenty nodes running continuously is roughly 4,800 USD a month. Bare metal at 1.11 USD per node hour is around 16,000 USD for the same node count.

Azure Functions: What is the minimum execution time for Azure Functions?

The minimum execution time is 100 milliseconds on Consumption plans. Premium plans charge based on core seconds and allocated memory.

Source
Portworx: Is backup included?

No. Portworx Backup is a separately priced product covering Kubernetes application backup.

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