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Developer Tools · head to head

RAD Studio vs Solace PubSub+

RAD Studio logo

RAD Studio

Developer Tools

Cross-platform native app development with Delphi and C++Builder

From
$2000/perpetual
Free plan
No
Visit RAD StudioFull 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

  • RAD Studio is a cross-platform IDE.
  • Solace PubSub+ is free; RAD Studio starts at $2000/mo.
  • Where RAD Studio falls short: professional edition costs $2,000 for the perpetual license plus $599 for year one maintenance, totaling $2,599 before tax.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

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

Attributes where RAD Studio and Solace PubSub+ differ
AttributeRAD StudioSolace PubSub+
Starting price$2000/perpetualFree
Pricing modelOne-timeQuote
Free tierNoYes
PlatformsWebLinux, Self-hosted, Web, Hardware appliance
CategoryDeveloper ToolsDatabases

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 RAD Studio

Nothing recorded that Solace PubSub+ does not also cover.

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.

RAD Studio

  • Building Windows desktop applications with VCL componentsnot Solace PubSub+
  • Creating iOS and Android apps from shared Delphi codebasenot Solace PubSub+
  • Connecting to Oracle databases through FireDAC connectivitynot Solace PubSub+
  • Building REST web services that run on Linux serversnot 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 RAD Studio
  • An exchange or trading platform with a latency budget that needs the hardware appliance rather than a software brokernot RAD Studio
  • An airline distributing operational events to ground systems, aircraft and partner APIs over different protocolsnot RAD Studio
  • A manufacturer bridging factory MQTT telemetry into an enterprise Kafka estate without writing translation servicesnot RAD Studio

Where each one falls short

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

RAD Studio

  • Professional edition costs $2,000 for the perpetual license plus $599 for year one maintenance, totaling $2,599 before tax
  • Enterprise edition steps up to $3,400 license plus $1,199 maintenance, and Architect edition to $4,416 license plus $2,183 maintenance
  • The perpetual license only entitles the buyer to updates for one year; continued access to new updates and upgrades requires an annually renewable Update Subscription

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

RAD Studio

$2000/perpetual
  • Professional Edition$2,000 one-off
    • Perpetual License
    • First year maintenance $599
    • Total $2,599 + Tax
  • Enterprise Edition$3,400 one-off
    • Perpetual License
    • First year maintenance $1,199
    • Total $4,599 + Tax
  • Architect Edition$4,416 one-off
    • Perpetual License
    • First year maintenance $2,183
    • Total $6,599 + Tax

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 RAD Studio if

Nothing in the data separates RAD Studio from Solace PubSub+ on the points above - pick on price and on how each one feels to use.

RAD Studio 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 RAD Studio or Solace PubSub+ better?
Neither clearly leads. RAD Studio starts at $2000/perpetual and Solace PubSub+ at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, RAD Studio or Solace PubSub+?
Solace PubSub+ has a free tier; the other does not. Paid plans start at $2000/perpetual for RAD Studio and Free for Solace PubSub+.
Does RAD Studio or Solace PubSub+ run on more platforms?
RAD Studio runs on Web. Solace PubSub+ runs on Linux, Self-hosted, Web, Hardware appliance.
Can I use Solace PubSub+ for free?
Yes. Solace PubSub+ has a free tier, so you can try it without paying. RAD Studio starts at $2000/perpetual.
What is RAD Studio best used for?
RAD Studio is most often used for building windows desktop applications with vcl components, creating ios and android apps from shared delphi codebase, connecting to oracle databases through firedac connectivity, building rest web services that run on linux servers. Of those, building windows desktop applications with vcl components and creating ios and android apps from shared delphi codebase are not what Solace PubSub+ is typically brought in for.
What can RAD Studio do that Solace PubSub+ cannot?
Solace PubSub+ covers Multi-protocol broker, Dynamic message routing, Hardware appliance, Event Portal.

Answered from the vendors’ own pages

RAD Studio: How much does RAD Studio cost?

RAD Studio uses perpetual licensing: Professional Edition $2,000 perpetual license + $599 first year maintenance ($2,599 total + tax). Enterprise Edition $3,400 license + $1,199 maintenance ($4,599 total + tax). Architect Edition $4,416 license + $2,183 maintenance ($6,599 total + tax).

Source
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.

RAD Studio: What is the difference between RAD Studio editions?

Professional Edition ($2,599 total + tax) targets individual developers. Enterprise Edition ($4,599 total + tax) adds multi-tier app capabilities. Architect Edition ($6,599 total + tax) includes advanced database and cloud features. All three include perpetual licenses.

Source
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.

RAD Studio: Does RAD Studio offer Kai AI integration and discounts?

Yes, adding Kai AI to any edition provides discounts: 25% off Professional ($2,136 + tax), 30% off Enterprise ($3,394 + tax), and 40% off Architect ($4,109 + tax). This promotion is active through August 31, 2026.

Source
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.

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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