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Energy · head to head

GE Digital GridOS vs Solace PubSub+

GE Digital GridOS logo

GE Digital GridOS

Energy

Advanced distribution management for the modern grid

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: GE Digital GridOS no pricing plans, tiers, or costs are published on the website; 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: GE Digital GridOS covers ADMS, 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 GE Digital GridOS and Solace PubSub+ actually diverge.

Attributes where GE Digital GridOS and Solace PubSub+ differ
AttributeGE Digital GridOSSolace PubSub+
Starting priceOn requestFree
Free tierNoYes
PlatformsWeb, On-premise, ApiLinux, Docker, Kubernetes, Cloud, Hardware appliance
CategoryEnergyDatabases
Founded1892Unknown

Identical on both: pricing model (quote), 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 GE Digital GridOS

  • ADMS
  • DERMS
  • Outage management
  • SCADA
  • Volt/VAR optimization
  • FLISR
  • Network modeling
  • Grid analytics

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.

GE Digital GridOS

  • Grid modernizationnot Solace PubSub+
  • DER integrationnot Solace PubSub+
  • Outage restorationnot Solace PubSub+
  • Grid optimizationnot Solace PubSub+
  • Renewable integrationnot 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 GE Digital GridOS
  • An exchange or trading platform with a latency budget that needs the hardware appliance rather than a software brokernot GE Digital GridOS
  • An airline distributing operational events to ground systems, aircraft and partner APIs over different protocolsnot GE Digital GridOS
  • A manufacturer bridging factory MQTT telemetry into an enterprise Kafka estate without writing translation servicesnot GE Digital GridOS

Where each one falls short

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

GE Digital GridOS

  • No pricing plans, tiers, or costs are published on the website
  • Requires direct contact with utility software experts for pricing inquiries

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

GE Digital GridOS

On request
  • ADMS$undefined/custom
    • Distribution management
    • Outage management
    • SCADA integration
  • DERMS$undefined/custom
    • DER management
    • Virtual power plant
    • Grid flexibility
  • Enterprise Suite$undefined/custom
    • Full ADMS + DERMS
    • Analytics platform
    • Digital twin

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 GE Digital GridOS if

  • You need adms.
  • You work on Web, On-premise, Api.
  • You also want derms.
GE Digital GridOS 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 GE Digital GridOS or Solace PubSub+ better?
Neither clearly leads. GE Digital GridOS 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, GE Digital GridOS or Solace PubSub+?
Solace PubSub+ has a free tier; the other does not. Paid plans start at On request for GE Digital GridOS and Free for Solace PubSub+.
Does GE Digital GridOS or Solace PubSub+ run on more platforms?
GE Digital GridOS runs on Web, On-premise, Api. 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. GE Digital GridOS starts at On request.
What is GE Digital GridOS best used for?
GE Digital GridOS is most often used for grid modernization, der integration, outage restoration, grid optimization. Of those, grid modernization and der integration are not what Solace PubSub+ is typically brought in for.
What can GE Digital GridOS do that Solace PubSub+ cannot?
GE Digital GridOS covers ADMS, DERMS, Outage management, SCADA. Solace PubSub+ covers Multi-protocol broker, Dynamic message routing, Hardware appliance, Event Portal.

Answered from the vendors’ own pages

GE Digital GridOS: How does GridOS publish pricing information?

GridOS does not disclose pricing on its website. Interested parties are directed to 'Connect with a utility software expert' through a contact form for pricing discussions.

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.

GE Digital GridOS: What is GridOS' licensing model?

GridOS' licensing model and pricing details are not published on publicly available pages. Custom quotes are required based on utility software implementation needs.

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.

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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