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Developer Tools · head to head

Restate vs Rhombus Systems

Restate logo

Restate

Developer Tools

Durable execution engine in Rust with a free tier and low-latency workflows

From
Free
Free plan
Yes
Full reviewWebsite
Rhombus Systems logo

Rhombus Systems

Cybersecurity

Cloud-managed cameras, sensors and access control with a per-camera annual licence

From
$149/year
Free plan
No
Full reviewWebsite

The short version

  • Only Restate has a free tier, so it costs nothing to try first.
  • Each has a real cost: Restate the runtime is under a Business Source Licence rather than an open source licence, so building a competing managed offering on it is prohibited and some procurement functions will reject it on licence grounds alone.; Rhombus Systems the per-camera annual licence never ends and a camera without an active licence stops working, so the total cost over a ten-year hardware life is several times the hardware price.
  • They diverge on capability: Restate covers Durable execution, Rhombus Systems covers On-camera storage.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Restate and Rhombus Systems actually diverge.

Attributes where Restate and Rhombus Systems differ
AttributeRestateRhombus Systems
Starting priceFree$149/year
Pricing modelPer month by durable action countPer camera per year licence plus hardware
Free tierYesNo
PlatformsLinux, macOS, WebWeb, iOS, Android
CategoryDeveloper ToolsCybersecurity

Identical on both: 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 Restate

  • Durable execution
  • Virtual objects
  • Single binary runtime
  • Multi-language SDKs
  • Workflows and sagas
  • Restate Cloud

Only in Rhombus Systems

  • On-camera storage
  • No NVR or server
  • AI search
  • Access control
  • Environmental sensors
  • Unlimited users
  • Ten year hardware warranty
  • Optional cloud archiving

What people use each for

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

Restate

  • Payment or order flows where a crash between two external API calls must not double-charge or lose the ordernot Rhombus Systems
  • AI agent loops that call tools over minutes or hours and must survive a deployment mid-runnot Rhombus Systems
  • Replacing hand-rolled retry, idempotency key and outbox code across a set of microservicesnot Rhombus Systems
  • A small team that wants durable workflows without operating a Temporal cluster and its databasenot Rhombus Systems

Rhombus Systems

  • A school district running video across dozens of buildings with no local IT at each sitenot Restate
  • A clinic group needing door access and cameras in one console under a single audit trailnot Restate
  • A logistics operator that wants to search for a specific vehicle across sites without scrubbing footagenot Restate
  • An office estate replacing ageing NVRs where nobody remains who knows how to maintain themnot Restate

Where each one falls short

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

Restate

  • The runtime is under a Business Source Licence rather than an open source licence, so building a competing managed offering on it is prohibited and some procurement functions will reject it on licence grounds alone.
  • Restate Cloud jumps from a free fifty thousand actions straight to 300 US dollars a month for twenty million, so a workload sitting at a few hundred thousand actions pays enterprise-shaped money for hobby-shaped volume.
  • It is a young project against Temporal’s established base, so hiring engineers who already know it is unrealistic and the answer to most questions is in the docs rather than on Stack Overflow.
  • The programming model requires structuring code around durable handlers and virtual objects, which is a genuine rewrite for existing services rather than a library you add.
  • The single-binary simplicity that makes small deployments cheap also means fewer operational knobs at very large scale than a system designed as separable components.

Rhombus Systems

  • The per-camera annual licence never ends and a camera without an active licence stops working, so the total cost over a ten-year hardware life is several times the hardware price.
  • Cameras must be Rhombus, so there is no reuse of existing IP cameras and migrating away means replacing every device rather than changing software.
  • Cloud archiving is priced separately by retention and stream count, and long retention on multisensor cameras runs into five figures per camera, which can dwarf everything else in the quote.
  • On-camera storage is the default retention, so a camera physically stolen or destroyed takes its unarchived footage with it unless cloud archiving was paid for on that camera.
  • Analytics and integrations are good for mid-market needs but shallower than a dedicated enterprise VMS with a large third-party ecosystem, so specialist requirements like advanced LPR or forensic search hit limits.

Pricing, plan by plan

Restate

Free
  • FreeFree
    • Fifty thousand durable actions per month
    • No credit card required
    • Community support
  • Starter$300/month
    • Twenty million actions per month
    • Two hundred actions per second, bursting to one thousand
    • Twenty GB storage
  • Pro$1000/month
    • Fifty million actions per month
    • Five hundred actions per second, bursting to two thousand
    • Fifty GB storage
  • Enterprise$undefined/year
    • Negotiated volume
    • Twenty-four seven P0 support
    • 99.99 per cent SLA

Rhombus Systems

$149/year
  • Professional$149/year
    • Per camera per year
    • Cloud console and management
    • On-camera storage retention
  • Enterprise$199/year
    • Per camera per year
    • Everything in Professional
    • Flexible cloud archiving options
  • Cloud archiving$undefined/year
    • Priced separately by retention period and stream count
    • Multisensor cameras cost several times a single sensor camera
    • Long retention on multisensor models can reach five figures per camera

Which should you pick?

Choose Restate if

  • You need durable execution.
  • You want to start without paying.
  • You work on Linux, macOS, Web.
  • You also want virtual objects.
Restate review

Choose Rhombus Systems if

  • You need on-camera storage.
  • You work on Web, iOS, Android.
  • You also want no nvr or server.
Rhombus Systems review

Questions people ask

Is Restate or Rhombus Systems better?
Neither clearly leads. Restate starts at Free and Rhombus Systems at $149/year, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Restate or Rhombus Systems?
Restate has a free tier; the other does not. Paid plans start at Free for Restate and $149/year for Rhombus Systems.
Does Restate or Rhombus Systems run on more platforms?
Restate runs on Linux, macOS, Web. Rhombus Systems runs on Web, iOS, Android.
Can I use Restate for free?
Yes. Restate has a free tier, so you can try it without paying. Rhombus Systems starts at $149/year.
What is Restate best used for?
Restate is most often used for payment or order flows where a crash between two external api calls must not double-charge or lose the order, ai agent loops that call tools over minutes or hours and must survive a deployment mid-run, replacing hand-rolled retry, idempotency key and outbox code across a set of microservices, a small team that wants durable workflows without operating a temporal cluster and its database. Of those, payment or order flows where a crash between two external api calls must not double-charge or lose the order and ai agent loops that call tools over minutes or hours and must survive a deployment mid-run are not what Rhombus Systems is typically brought in for.
What can Restate do that Rhombus Systems cannot?
Restate covers Durable execution, Virtual objects, Single binary runtime, Multi-language SDKs. Rhombus Systems covers On-camera storage, No NVR or server, AI search, Access control.

Answered from the vendors’ own pages

Restate: Is Restate open source?

The SDKs are MIT. The runtime is under a Business Source Licence, which permits self-hosting but not offering it as a competing service.

Rhombus Systems: Do I need an NVR or a server?

No. Cameras record on board and connect directly to the cloud console, which is the main operational reason organisations pick it.

Restate: How does it compare with Temporal?

Same problem, different shape: one Rust binary with embedded storage instead of a server plus database plus workers, and lower per-step latency.

Rhombus Systems: What does the licence cost?

Roughly $149 per camera per year for Professional and about $199 for Enterprise, typically sold in one, three, five or ten year terms.

Restate: Is there a free tier?

Yes, fifty thousand durable actions a month on Restate Cloud with no card required.

Rhombus Systems: Is cloud storage included?

No. On-camera storage is the default. Cloud archiving is a separate charge priced by retention duration and number of streams.

Restate: Which languages are supported?

TypeScript, Java, Kotlin, Go, Python and Rust.

Rhombus Systems: Can I use my existing cameras?

No. The platform works only with Rhombus hardware, which is the trade-off for the zero-server architecture.

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