Softwr

Automation Integration · head to head

Meltano vs NATS

Meltano logo

Meltano

Automation Integration

Open source ELT built on the Singer tap and target ecosystem, configured as code

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: Meltano the company behind Meltano wound down in December 2025 and the project was transferred to Matatika, a much smaller organisation, so roadmap velocity and the size of the maintenance team are now materially lower than the tool's reputation suggests.; NATS core NATS has no persistence at all, so messages are lost if no subscriber is listening
  • They diverge on capability: Meltano covers Singer plugin management, NATS covers Very low latency.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Meltano and NATS actually diverge.

Attributes where Meltano and NATS differ
AttributeMeltanoNATS
PlatformsLinux, macOS, Docker, Windows (via WSL)Linux, macOS, Windows, Docker, Kubernetes
CategoryAutomation IntegrationDatabases

Identical on both: starting price (Free), pricing model (Open source, no licence fee), 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 Meltano

  • Singer plugin management
  • Project as code
  • Environments
  • Incremental state
  • dbt integration
  • Custom taps
  • Orchestrator hooks
  • Container deployment

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.

Meltano

  • A data team that wants to stop paying per-row connector fees on high-volume sources they can extract themselvesnot NATS
  • Loading from an API that no commercial ELT vendor supports, by writing a tap with the Meltano SDKnot NATS
  • Keeping pipeline configuration in the same Git repository and review process as the rest of the platform codenot NATS
  • A regulated environment where extraction must run inside your own network with no data passing through a vendornot NATS

NATS

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

Where each one falls short

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

Meltano

  • The company behind Meltano wound down in December 2025 and the project was transferred to Matatika, a much smaller organisation, so roadmap velocity and the size of the maintenance team are now materially lower than the tool's reputation suggests.
  • Singer connector quality varies enormously; a tap may be maintained, abandoned, or maintained only for the subset of endpoints its original author needed, and you will not know which until a schema change breaks a load at 3am.
  • There is no managed hosting from the project itself, so someone on your team owns scheduling, secrets, retries, alerting and upgrades, which is real headcount that a per-row SaaS bill was buying for you.
  • It is command-line and YAML first with no meaningful web interface, so analysts who are not comfortable in Git and a terminal cannot maintain pipelines themselves.
  • Debugging spans three layers, the tap, Meltano itself and the target, and each has its own logging conventions, so failures often require reading Python source in a third-party connector.

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

Meltano

Free
  • MeltanoFree
    • MIT licensed, self-hosted
    • No paid Meltano Cloud tier; it was retired before the company wound down
    • Community support via Slack and GitHub

NATS

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

Which should you pick?

Choose Meltano if

  • You need singer plugin management.
  • You want to start without paying.
  • You work on Linux, macOS, Docker, Windows (via WSL).
  • You also want project as code.
Meltano 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 Meltano or NATS better?
Neither clearly leads. Meltano 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, Meltano or NATS?
Meltano starts at Free and NATS at Free.
Does Meltano or NATS run on more platforms?
Meltano runs on Linux, macOS, Docker, Windows (via WSL). NATS runs on Linux, macOS, Windows, Docker, Kubernetes.
Can I use Meltano for free?
Both have a free tier, so you can try either at no cost before committing.
What is Meltano best used for?
Meltano is most often used for a data team that wants to stop paying per-row connector fees on high-volume sources they can extract themselves, loading from an api that no commercial elt vendor supports, by writing a tap with the meltano sdk, keeping pipeline configuration in the same git repository and review process as the rest of the platform code, a regulated environment where extraction must run inside your own network with no data passing through a vendor. Of those, a data team that wants to stop paying per-row connector fees on high-volume sources they can extract themselves and loading from an api that no commercial elt vendor supports, by writing a tap with the meltano sdk are not what NATS is typically brought in for.
What can Meltano do that NATS cannot?
Meltano covers Singer plugin management, Project as code, Environments, Incremental state. NATS covers Very low latency, JetStream, Single binary, Request-reply.

Answered from the vendors’ own pages

Meltano: Is Meltano still maintained after the company shut down?

Yes. Arch, formerly Meltano, was acquired by Matatika in December 2025 and the open source project continues under their stewardship, with releases through 2026.

NATS: Is NATS free?

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

Meltano: Is there a hosted Meltano?

Not from the project. Meltano Cloud was retired, and hosting now comes from Matatika or from running the container yourself.

NATS: Does NATS persist messages?

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

Meltano: How does it compare on cost with Fivetran?

Meltano has no licence fee, so the comparison is your engineering time versus Fivetran's per-monthly-active-row billing. High-volume, low-complexity sources favour Meltano; long tails of fiddly SaaS APIs favour Fivetran.

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.

Meltano: Can I use Airbyte connectors with it?

Yes, Meltano can run Airbyte source connectors through a bridge, which widens the connector pool beyond Singer taps.

Share

Related pages

More on Meltano

More on NATS

Keep looking

Other head to heads