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Automation Integration · head to head

Decodable vs NATS

Decodable logo

Decodable

Automation Integration

Managed Apache Flink and Debezium with credit-based pricing and a free tier

From
Free
Rated
-
Full reviewWebsite
NATS logo

NATS

Databases

High-performance messaging system for cloud-native applications

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Decodable credit pricing rewards intermittent work and penalises always-on pipelines: a single small task running continuously costs roughly 86 US dollars a month before any parallelism.; NATS core NATS has no persistence at all, so messages are lost if no subscriber is listening
  • They diverge on capability: Decodable covers Managed Flink, NATS covers Very low latency.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Decodable and NATS actually diverge.

Attributes where Decodable and NATS differ
AttributeDecodableNATS
Pricing modelPer credit by task hourOpen source, no licence fee
PlatformsWeb, LinuxLinux, macOS, Windows, Docker, Kubernetes
CategoryAutomation IntegrationDatabases

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 Decodable

  • Managed Flink
  • Change data capture
  • SQL pipelines
  • Custom Flink jobs
  • Credit-based metering
  • Managed connectors

Only in NATS

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

What people use each for

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

Decodable

  • Streaming Postgres change data capture into Snowflake or Iceberg without running Debezium and Kafka Connect yourselfnot NATS
  • Real-time enrichment and filtering of event streams before they reach an expensive warehousenot NATS
  • A team that already writes Flink jobs but does not want to operate the cluster, checkpoint store or upgradesnot NATS
  • Replacing a fragile set of cron jobs and Lambda functions that move data between operational systemsnot NATS

NATS

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

Where each one falls short

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

Decodable

  • Credit pricing rewards intermittent work and penalises always-on pipelines: a single small task running continuously costs roughly 86 US dollars a month before any parallelism.
  • Parallelism multiplies tasks, so scaling a pipeline to keep up with throughput multiplies the bill in a way that is easy to under-forecast at design time.
  • The free tier retains streams for only 24 hours, which is too short to debug an intermittent failure that surfaces days later.
  • Java and Python transformations are gated behind paid plans, so anything the SQL layer cannot express means moving off the free tier immediately.
  • The operational layer is proprietary even though Flink and Debezium are not, so migrating to self-managed Flink later means rebuilding connectors, schema handling and monitoring from scratch.

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

Pricing, plan by plan

Decodable

Free
  • FreeFree
    • Up to four concurrent tasks
    • Small and medium task sizes
    • 24 hour or 10 GB stream retention
  • On Demand$undefined/month
    • 0.12 USD per credit, billed monthly
    • Unlimited concurrent tasks
    • Small, medium and large task sizes
  • Enterprise$undefined/year
    • 0.10 USD per credit on pre-purchased annual capacity
    • Custom task sizes
    • Extensible retention

NATS

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

Which should you pick?

Choose Decodable if

  • You need managed flink.
  • You want to start without paying.
  • You work on Web, Linux.
  • You also want change data capture.
Decodable review

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

Questions people ask

Is Decodable or NATS better?
Neither clearly leads. Decodable starts at Free and NATS at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Decodable or NATS?
Decodable starts at Free and NATS at Free.
Does Decodable or NATS run on more platforms?
Decodable runs on Web, Linux. NATS runs on Linux, macOS, Windows, Docker, Kubernetes.
Can I use Decodable for free?
Both have a free tier, so you can try either at no cost before committing.
What is Decodable best used for?
Decodable is most often used for streaming postgres change data capture into snowflake or iceberg without running debezium and kafka connect yourself, real-time enrichment and filtering of event streams before they reach an expensive warehouse, a team that already writes flink jobs but does not want to operate the cluster, checkpoint store or upgrades, replacing a fragile set of cron jobs and lambda functions that move data between operational systems. Of those, streaming postgres change data capture into snowflake or iceberg without running debezium and kafka connect yourself and real-time enrichment and filtering of event streams before they reach an expensive warehouse are not what NATS is typically brought in for.
What can Decodable do that NATS cannot?
Decodable covers Managed Flink, Change data capture, SQL pipelines, Custom Flink jobs. NATS covers Very low latency, JetStream, Single binary, Request-reply.

Answered from the vendors’ own pages

Decodable: What is a credit worth?

0.12 US dollars on On Demand and 0.10 on Enterprise. A small task consumes one credit per hour, medium two, large four.

NATS: Is NATS free?

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

Decodable: Is there a free plan?

Yes, up to four concurrent tasks with 24 hour or 10 GB stream retention.

NATS: Does NATS persist messages?

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

Decodable: Is it really Apache Flink underneath?

Yes, Flink for processing and Debezium for change data capture, both managed by Decodable.

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.

Decodable: Can I run my own Flink jobs?

Yes, Java and Python jobs on paid plans; the free plan is SQL only.

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