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Databases · head to head

NATS vs ToolJet

NATS logo

NATS

Databases

High-performance messaging system for cloud-native applications

From
Free
Free plan
Yes
Visit NATSFull review
ToolJet logo

ToolJet

No-Code

Open-source low-code platform for building internal tools and business apps

From
Free
Free plan
Yes
Visit ToolJetFull review

The short version

  • NATS is free; ToolJet starts at $79/mo.
  • Only NATS lists very low latency; only ToolJet lists drag-and-drop app builder.
  • Where NATS falls short: core NATS has no persistence at all, so messages are lost if no subscriber is listening.
  • Where ToolJet falls short: free and Pro tiers cap end users at 50, which may be too low for apps needing broad internal distribution.
  • Prices and features on this page were last checked on 29 August 2026.

Where they differ

Only the attributes on which NATS and ToolJet actually diverge.

Attributes where NATS and ToolJet differ
AttributeNATSToolJet
Pricing modelOpen source, no licence feeFreemium
PlatformsLinux, macOS, Windows, Self-hostedWeb, API, Linux, Windows, macOS
CategoryDatabasesNo-Code

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

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 ToolJet

  • Drag-and-drop app builder
  • AI-assisted generation
  • Database and API connectors
  • Self-hosted and air-gapped deployment
  • Multi-instance deployments
  • Dedicated support manager

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 ToolJet
  • Edge and IoT messaging where a lightweight broker mattersnot ToolJet
  • Replacing a heavier broker when the workload does not need its guaranteesnot ToolJet

ToolJet

  • Building internal admin dashboards and appsnot NATS
  • Self-hosted or air-gapped internal tool deploymentnot NATS
  • AI-assisted rapid app prototypingnot NATS
  • Connecting multiple data sources into one appnot 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

ToolJet

  • Free and Pro tiers cap end users at 50, which may be too low for apps needing broad internal distribution
  • Enterprise pricing starts at a steep $3,000/month, a large jump from the $199/month Team plan
  • AI credits reset monthly and do not roll over, penalizing uneven month-to-month usage
  • Smaller integration and community ecosystem than more established players like Retool

Pricing, plan by plan

NATS

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

ToolJet

Free
  • FreeFree
    • 2 builders
    • 50 end users
    • 2 apps
  • Pro$79/mo
    • Unlimited builders (per-builder pricing)
    • 50 end users
    • 5 apps
  • Team$199/mo
    • Unlimited builders (per-builder pricing)
    • 100 end users
    • Unlimited apps
  • Enterprise$3,000/mo
    • Unlimited end users
    • Custom AI credits
    • Dedicated support 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, Self-hosted.
  • You also want jetstream.
NATS review

Choose ToolJet if

  • You need drag-and-drop app builder.
  • You want to start without paying.
  • You work on Web, API, Linux, Windows, macOS.
  • You also want ai-assisted generation.
ToolJet review

Questions people ask

Is NATS or ToolJet better?
Neither clearly leads. NATS starts at Free and ToolJet at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, NATS or ToolJet?
NATS starts at Free and ToolJet at Free.
Does NATS or ToolJet run on more platforms?
NATS runs on Linux, macOS, Windows, Self-hosted. ToolJet runs on Web, API, Linux, Windows, macOS.
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 ToolJet is typically brought in for.
What can NATS do that ToolJet cannot?
NATS covers Very low latency, JetStream, Single binary, Request-reply. ToolJet covers Drag-and-drop app builder, AI-assisted generation, Database and API connectors, Self-hosted and air-gapped deployment.

Answered from the vendors’ own pages

NATS: Is NATS free?

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

ToolJet: What happens if I run out of AI credits?

Users can continue using all other ToolJet features as normal and can contact support to purchase additional AI credits when the monthly allotment runs out.

Source
NATS: Does NATS persist messages?

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

ToolJet: Do unused AI credits roll over?

No, AI credits reset every month and unused credits do not carry over, which ToolJet says helps maintain consistent service quality.

Source
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.

ToolJet: Can ToolJet be deployed on-premise?

Yes, both the community and enterprise editions support on-premise and air-gapped deployments, typically completed in under 30 minutes.

Source
ToolJet: Is there a free trial for paid plans?

ToolJet offers a 14-day free trial for both its business and enterprise editions.

Source
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