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Cloud Native Buildpacks vs Solace PubSub+

Cloud Native Buildpacks logo

Cloud Native Buildpacks

Developer Tools

Specification and tooling that turns source code into OCI images without Dockerfiles

From
Free
Free plan
Yes
Visit Cloud Native BuildpacksFull review
Solace PubSub+ logo

Solace PubSub+

Databases

Multi-protocol event broker sold as software, cloud service or a hardware appliance

From
Free
Free plan
Yes
Visit Solace PubSub+Full review

The short version

  • Cloud Native Buildpacks is a specification plus a lifecycle and the pack CLI.
  • Both are free.
  • Only Cloud Native Buildpacks lists detect and build lifecycle; only Solace PubSub+ lists multi-protocol broker.
  • Prices and features on this page were last checked on 31 August 2026.

Where they differ

Only the attributes on which Cloud Native Buildpacks and Solace PubSub+ actually diverge.

Attributes where Cloud Native Buildpacks and Solace PubSub+ differ
AttributeCloud Native BuildpacksSolace PubSub+
Pricing modelOpen source, no licence feeQuote
PlatformsLinux, macOS, Windows, API, Self-hostedLinux, Self-hosted, Web, Hardware appliance
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 Cloud Native Buildpacks

  • Detect and build lifecycle
  • Image rebasing
  • Reproducible layers
  • Builder images
  • Automatic SBOM output
  • pack CLI

Only in Solace PubSub+

  • Multi-protocol broker
  • Dynamic message routing
  • Hardware appliance
  • Event Portal
  • Guaranteed delivery
  • Mission Control
  • Topic hierarchies and wildcards
  • Kafka and MQ bridging

What people use each for

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

Cloud Native Buildpacks

  • Patching a base image once and rebasing hundreds of application images rather than rebuilding and redeploying eachnot Solace PubSub+
  • Removing per-team Dockerfiles at an organisation where inconsistent base images have become an audit findingnot Solace PubSub+
  • Giving application teams a supported path to a hardened image without teaching every team container securitynot Solace PubSub+
  • Choosing a build system that a risk committee will accept because governance is vendor neutral rather than single vendornot Solace PubSub+

Solace PubSub+

  • A bank building an event mesh across regions where a Java JMS application and an MQTT mobile client must share the same topic spacenot Cloud Native Buildpacks
  • An exchange or trading platform with a latency budget that needs the hardware appliance rather than a software brokernot Cloud Native Buildpacks
  • An airline distributing operational events to ground systems, aircraft and partner APIs over different protocolsnot Cloud Native Buildpacks
  • A manufacturer bridging factory MQTT telemetry into an enterprise Kafka estate without writing translation servicesnot Cloud Native Buildpacks

Where each one falls short

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

Cloud Native Buildpacks

  • The operational cost is real: you own builder images, base image refresh cadence and migrations between specification versions, which currently sit at Buildpack API 0.10 and Platform API 0.12 with published migration guides, so breaking changes are a recurring chore
  • A cold build with no warm cache is noticeably slower than a well layered Dockerfile, and because the cache lives in a cache image or volume, ephemeral continuous integration runners pay full price on every run unless you deliberately warm them
  • Reproducibility depends on discipline rather than defaults, because buildpacks resolve runtime patch versions at build time unless you pin them and stability is only as good as the builder image tag you point at
  • The specification is neutral but the buildpacks are not, and in practice you depend on Paketo, Heroku or Google, whose roadmaps, support levels and update cadences differ; CNCF also records contributing organisations down 12 per cent year on year
  • Native dependencies, unusual monorepo layouts and non-standard project structures push you into writing custom buildpacks or extensions, which is a genuine engineering investment and not a configuration change

Solace PubSub+

  • No pricing is published at any tier, so evaluation requires a sales engagement before you can even judge whether it is in budget, and broker tier sizing determines cost in ways buyers frequently get wrong
  • The free Standard edition has hard capacity and support limits, which makes it useful for development but means any real deployment triggers a commercial negotiation
  • The proprietary SMF protocol gives the best performance and feature coverage, so teams that lean on it acquire real switching costs even though open protocols are supported
  • Operating a self-managed high availability broker pair with disaster recovery is a specialist task, and Solace expertise is scarce in the hiring market compared with Kafka skills
  • Event Portal and Mission Control are licensed as part of platform packages, so the governance tooling that makes an event mesh manageable is not simply included with the broker

Pricing, plan by plan

Cloud Native Buildpacks

Free
  • Cloud Native BuildpacksFree
    • Apache-2.0, hosted by the CNCF
    • No commercial edition from the project itself
    • Commercial support only from vendors of specific buildpack distributions

Solace PubSub+

Free
  • Software Event Broker StandardFree
    • Free for production within capacity limits
    • Single node, capped connections and queues
    • No vendor support
  • Solace CloudOn request
    • Managed brokers in tiers from ENT-250 to ENT-100K
    • Foundation, Accelerate and Scale platform packages
    • Fixed subscription or annual consumption drawdown
  • Software Enterprise self-managedOn request
    • Deploy in your own Kubernetes, VMs or data centre
    • High availability and disaster recovery
    • Support with SLA
  • Hardware applianceOn request
    • Purpose-built appliance with FPGA message offload
    • Deterministic low latency
    • Sold with support contract

Which should you pick?

Choose Cloud Native Buildpacks if

  • You need detect and build lifecycle.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, API, Self-hosted.
  • You also want image rebasing.
Cloud Native Buildpacks review

Choose Solace PubSub+ if

  • You need multi-protocol broker.
  • You want to start without paying.
  • You work on Linux, Self-hosted, Web, Hardware appliance.
  • You also want dynamic message routing.
Solace PubSub+ review

Questions people ask

Is Cloud Native Buildpacks or Solace PubSub+ better?
Neither clearly leads. Cloud Native Buildpacks starts at Free and Solace PubSub+ at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cloud Native Buildpacks or Solace PubSub+?
Cloud Native Buildpacks starts at Free and Solace PubSub+ at Free.
Does Cloud Native Buildpacks or Solace PubSub+ run on more platforms?
Cloud Native Buildpacks runs on Linux, macOS, Windows, API, Self-hosted. Solace PubSub+ runs on Linux, Self-hosted, Web, Hardware appliance.
Can I use Cloud Native Buildpacks for free?
Both have a free tier, so you can try either at no cost before committing.
What is Cloud Native Buildpacks best used for?
Cloud Native Buildpacks is most often used for patching a base image once and rebasing hundreds of application images rather than rebuilding and redeploying each, removing per-team dockerfiles at an organisation where inconsistent base images have become an audit finding, giving application teams a supported path to a hardened image without teaching every team container security, choosing a build system that a risk committee will accept because governance is vendor neutral rather than single vendor. Of those, patching a base image once and rebasing hundreds of application images rather than rebuilding and redeploying each and removing per-team dockerfiles at an organisation where inconsistent base images have become an audit finding are not what Solace PubSub+ is typically brought in for.
What can Cloud Native Buildpacks do that Solace PubSub+ cannot?
Cloud Native Buildpacks covers Detect and build lifecycle, Image rebasing, Reproducible layers, Builder images. Solace PubSub+ covers Multi-protocol broker, Dynamic message routing, Hardware appliance, Event Portal.

Answered from the vendors’ own pages

Cloud Native Buildpacks: What does CNCF graduation actually change?

Nothing technically, but it signals audited governance, security review and multi-vendor maintenance, which is usually what a procurement or risk team needs before approving a build system.

Solace PubSub+: Is there a free version of Solace?

Yes, the Standard edition of the software event broker is free for production within capacity limits, with no vendor support.

Cloud Native Buildpacks: How is this different from writing a Dockerfile?

Container build knowledge lives with the platform team in a builder image rather than in every repository, and rebasing lets you patch the runtime base of many images without rebuilding them.

Solace PubSub+: Does Solace publish prices?

No. Cloud, software and appliance are all quoted, based on broker tier from ENT-250 to ENT-100K and licensing model.

Cloud Native Buildpacks: Does it cost anything?

No. The specification and tooling are Apache-2.0 and free. You pay only if you buy commercial support for a specific buildpack distribution from Broadcom, Heroku or Google.

Solace PubSub+: Why buy an appliance in 2026?

Deterministic low latency with message processing offloaded to hardware, which matters in capital markets and little elsewhere.

Cloud Native Buildpacks: Is it slower than a Dockerfile?

On a cold build with no cache, yes. Warm builds are competitive, but continuous integration runners that start empty every time will feel the difference.

Solace PubSub+: Can it replace Kafka?

Not for log retention and stream reprocessing. It is stronger at multi-protocol routing and guaranteed delivery, and the two are often bridged.

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