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Databases · head to head

NATS vs Orkes

NATS logo

NATS

Databases

High-performance messaging system for cloud-native applications

From
Free
Rated
-
Full reviewWebsite
Orkes logo

Orkes

Automation Integration

Commercial Conductor, now the maintainer of the workflow engine Netflix archived

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: NATS core NATS has no persistence at all, so messages are lost if no subscriber is listening; Orkes netflix archived the Conductor repository in December 2023 and Orkes took over maintenance, so the large-company backing that justified many original adoptions no longer exists.
  • They diverge on capability: NATS covers Very low latency, Orkes covers JSON workflow definitions.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which NATS and Orkes actually diverge.

Attributes where NATS and Orkes differ
AttributeNATSOrkes
Pricing modelOpen source, no licence feequote
PlatformsLinux, macOS, Windows, Docker, KubernetesLinux, Docker, Kubernetes, Cloud
CategoryDatabasesAutomation Integration

Identical on both: starting price (Free), free tier (Yes), 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 NATS

  • Very low latency
  • JetStream
  • Single binary
  • Request-reply

Only in Orkes

  • JSON workflow definitions
  • Polyglot workers
  • Visual workflow builder
  • AI and LLM tasks
  • Human tasks
  • Event handlers
  • RBAC and secrets
  • Hosted or self-hosted

What people use each for

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

NATS

  • Service-to-service messaging where latency is the binding constraintnot Orkes
  • Edge and IoT messaging where a lightweight broker mattersnot Orkes
  • Replacing a heavier broker when the workload does not need its guaranteesnot Orkes

Orkes

  • A microservices estate that needs orchestration across services written in different languages without a shared SDKnot NATS
  • A team already running Conductor OSS that wants a supported distribution now that Netflix has stopped maintaining itnot NATS
  • An AI platform composing agent steps, model calls and vector lookups as versioned workflow definitionsnot NATS
  • A business process needing human approval steps interleaved with automated service callsnot NATS

Where each one falls short

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

NATS

  • Core NATS has no persistence at all, so messages are lost if no subscriber is listening
  • JetStream adds the durability but also the operational complexity NATS is chosen to avoid
  • A much smaller ecosystem than Kafka or RabbitMQ, with fewer connectors and integrations
  • Fewer people know it, so hiring and existing organisational knowledge favour the alternatives

Orkes

  • Netflix archived the Conductor repository in December 2023 and Orkes took over maintenance, so the large-company backing that justified many original adoptions no longer exists.
  • Enterprise pricing is entirely unpublished, and the only free option is explicitly a prototyping sandbox whose limits can change at any time, so there is no supported low-cost entry point.
  • Self-hosting Conductor OSS in production means operating the engine plus its persistence and indexing dependencies, typically Postgres or Cassandra with Elasticsearch, which is a substantial platform commitment.
  • JSON workflow definitions are language agnostic but verbose and awkward to test, and teams accustomed to defining workflows in code find them a step backwards in developer experience.
  • Orkes is a small company whose commercial future is tied to a single open source project it also maintains, which concentrates both vendor and project risk in the same place.

Pricing, plan by plan

NATS

Free
  • NATSFree
    • Full functionality
    • No usage limits
    • Community support

Orkes

Free
  • Developer EditionFree
    • All Conductor OSS features plus enterprise capabilities
    • Sandbox for prototyping only
    • Rate limits and resources may change without notice
  • Enterprise$undefined/year
    • Availability SLA up to 99.99%
    • Orkes-hosted or customer-hosted deployment
    • Dedicated technical account manager

Which should you pick?

Choose NATS if

  • You need very low latency.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, Docker, Kubernetes.
  • You also want jetstream.
NATS review

Choose Orkes if

  • You need json workflow definitions.
  • You want to start without paying.
  • You work on Linux, Docker, Kubernetes, Cloud.
  • You also want polyglot workers.
Orkes review

Questions people ask

Is NATS or Orkes better?
Neither clearly leads. NATS starts at Free and Orkes at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, NATS or Orkes?
NATS starts at Free and Orkes at Free.
Does NATS or Orkes run on more platforms?
NATS runs on Linux, macOS, Windows, Docker, Kubernetes. Orkes runs on Linux, Docker, Kubernetes, Cloud.
Can I use NATS for free?
Both have a free tier, so you can try either at no cost before committing.
What is NATS best used for?
NATS is most often used for service-to-service messaging where latency is the binding constraint, edge and iot messaging where a lightweight broker matters, replacing a heavier broker when the workload does not need its guarantees. Of those, service-to-service messaging where latency is the binding constraint and edge and iot messaging where a lightweight broker matters are not what Orkes is typically brought in for.
What can NATS do that Orkes cannot?
NATS covers Very low latency, JetStream, Single binary, Request-reply. Orkes covers JSON workflow definitions, Polyglot workers, Visual workflow builder, AI and LLM tasks.

Answered from the vendors’ own pages

NATS: Is NATS free?

Yes, open source and CNCF-graduated. Synadia sells a managed service.

Orkes: Does Netflix still maintain Conductor?

No. Netflix archived its repository in December 2023. The open source project continues at conductor-oss under Apache 2.0, maintained by Orkes.

NATS: Does NATS persist messages?

Core NATS does not — it is fire-and-forget. JetStream adds persistence, streaming and replay when you need them.

Orkes: Is there a free production tier?

No. The Developer Edition is a sandbox that the vendor states is unsuitable for production. Self-hosting Conductor OSS is the free production route.

NATS: NATS or Kafka?

NATS is far lighter and lower latency, and much simpler to run. Kafka is the answer when you need a durable replayable log and a large connector ecosystem.

Orkes: What does Enterprise cost?

Nothing is published; it is quoted by deployment and support requirements.

Orkes: How does it compare with Temporal?

Conductor uses declarative JSON workflow definitions and external workers; Temporal defines workflows in code. Temporal has the larger community.

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