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Databases · head to head

Instaclustr vs Solace PubSub+

Instaclustr logo

Instaclustr

Databases

NetApp-owned managed service for Cassandra, Kafka, OpenSearch, PostgreSQL and Cadence with a bring-your-own-cloud model

From
On request
Rated
-
Full reviewWebsite
Solace PubSub+ logo

Solace PubSub+

Databases

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

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Solace PubSub+ has a free tier, so it costs nothing to try first.
  • Each has a real cost: Instaclustr pricing is only obtainable through a configurator or sales conversation, so comparing against AWS MSK or Confluent list prices requires several rounds of quotes rather than a spreadsheet.; 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.
  • They diverge on capability: Instaclustr covers Unmodified open source, Solace PubSub+ covers Multi-protocol broker.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Instaclustr and Solace PubSub+ actually diverge.

Attributes where Instaclustr and Solace PubSub+ differ
AttributeInstaclustrSolace PubSub+
Starting priceOn requestFree
Free tierNoYes
PlatformsCloud, LinuxLinux, Docker, Kubernetes, Cloud, Hardware appliance

Identical on both: pricing model (quote), 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 Instaclustr

  • Unmodified open source
  • Bring your own cloud
  • Multi technology platform
  • 24/7 operations
  • Managed backups
  • Terraform provider
  • SOC 2 and compliance
  • Consulting and support

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.

Instaclustr

  • An enterprise running Cassandra and Kafka that cannot hire and retain specialists for bothnot Solace PubSub+
  • A company with cloud committed spend that wants managed data infrastructure to draw down that commitment through the bring-your-own-cloud modelnot Solace PubSub+
  • A team that left Elastic over the licence change and wants OpenSearch operated by someone else without another proprietary forknot Solace PubSub+
  • An organisation migrating off Amazon MSK or Keyspaces that wants the same open source software with vendor operations but portability intactnot 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 Instaclustr
  • An exchange or trading platform with a latency budget that needs the hardware appliance rather than a software brokernot Instaclustr
  • An airline distributing operational events to ground systems, aircraft and partner APIs over different protocolsnot Instaclustr
  • A manufacturer bridging factory MQTT telemetry into an enterprise Kafka estate without writing translation servicesnot Instaclustr

Where each one falls short

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

Instaclustr

  • Pricing is only obtainable through a configurator or sales conversation, so comparing against AWS MSK or Confluent list prices requires several rounds of quotes rather than a spreadsheet.
  • It manages infrastructure, not data modelling, so a poor Cassandra partition key or a mis-sized Kafka topic still causes outages that the managed service will not prevent.
  • NetApp ownership since 2022 has put the roadmap inside a large storage vendor, and the product is now one line in a portfolio rather than the whole company.
  • The catalogue is broad but each technology is served at a general level, so teams needing deep, vendor-specific tuning often find a specialist provider goes further on their one technology.
  • Bring your own cloud reduces lock-in but shifts networking, IAM and VPC peering complexity onto the customer, which needs cloud engineering capacity the managed service was meant to save.

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

Instaclustr

On request
  • Instaclustr Managed Platform$undefined/month
    • Priced per node size, technology, cloud provider and region
    • Interactive calculator requires configuration before a figure appears
    • Discounts on 12 month commitment

Solace PubSub+

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

Which should you pick?

Choose Instaclustr if

  • You need unmodified open source.
  • You work on Cloud, Linux.
  • You also want bring your own cloud.
Instaclustr review

Choose Solace PubSub+ if

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

Questions people ask

Is Instaclustr or Solace PubSub+ better?
Neither clearly leads. Instaclustr starts at On request and Solace PubSub+ at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Instaclustr or Solace PubSub+?
Solace PubSub+ has a free tier; the other does not. Paid plans start at On request for Instaclustr and Free for Solace PubSub+.
Does Instaclustr or Solace PubSub+ run on more platforms?
Instaclustr runs on Cloud, Linux. Solace PubSub+ runs on Linux, Docker, Kubernetes, Cloud, Hardware appliance.
Can I use Solace PubSub+ for free?
Yes. Solace PubSub+ has a free tier, so you can try it without paying. Instaclustr starts at On request.
What is Instaclustr best used for?
Instaclustr is most often used for an enterprise running cassandra and kafka that cannot hire and retain specialists for both, a company with cloud committed spend that wants managed data infrastructure to draw down that commitment through the bring-your-own-cloud model, a team that left elastic over the licence change and wants opensearch operated by someone else without another proprietary fork, an organisation migrating off amazon msk or keyspaces that wants the same open source software with vendor operations but portability intact. Of those, an enterprise running cassandra and kafka that cannot hire and retain specialists for both and a company with cloud committed spend that wants managed data infrastructure to draw down that commitment through the bring-your-own-cloud model are not what Solace PubSub+ is typically brought in for.
What can Instaclustr do that Solace PubSub+ cannot?
Instaclustr covers Unmodified open source, Bring your own cloud, Multi technology platform, 24/7 operations. Solace PubSub+ covers Multi-protocol broker, Dynamic message routing, Hardware appliance, Event Portal.

Answered from the vendors’ own pages

Instaclustr: Does Instaclustr modify the open source software?

No. Its stated commitment is one hundred per cent open source with no proprietary extensions, which is the main reason licence-averse buyers choose it.

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.

Instaclustr: Who owns Instaclustr?

NetApp, which acquired the company in 2022. It is now branded NetApp Instaclustr.

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.

Instaclustr: Is pricing published?

No. There is an interactive calculator, but figures depend on technology, node size, cloud and region, and commitments are negotiated.

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.

Instaclustr: Can clusters run in my own cloud account?

Yes, through the bring-your-own-cloud model, so the infrastructure spend also counts toward your cloud commitment.

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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