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Appsmith vs NATS

Appsmith logo

Appsmith

No-Code

The open-source low-code framework

From
Free
Free plan
Yes
Visit AppsmithFull review
NATS logo

NATS

Databases

High-performance messaging system for cloud-native applications

From
Free
Free plan
Yes
Visit NATSFull review

The short version

  • NATS is free; Appsmith starts at $15/user/mo.
  • Only Appsmith lists drag-and-drop builder; only NATS lists very low latency.
  • Where Appsmith falls short: the free cloud tier is capped at 5 users, 5 workspaces and 3 Git repositories.
  • Where NATS falls short: core NATS has no persistence at all, so messages are lost if no subscriber is listening.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

Only the attributes on which Appsmith and NATS actually diverge.

Attributes where Appsmith and NATS differ
AttributeAppsmithNATS
Pricing modelSubscriptionOpen source, no licence fee
PlatformsWeb, Self-hostedLinux, macOS, Windows, Self-hosted
CategoryNo-CodeDatabases

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

Not yet recorded: founded for NATS.

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 Appsmith

  • Drag-and-drop builder
  • Database integration
  • REST API
  • Workflows
  • Authentication
  • Custom code
  • Git integration
  • 100+ integrations

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.

Appsmith

  • Building internal admin panels over existing databases and APIsnot NATS
  • Self-hosting a low-code internal tool platformnot NATS
  • Custom CRUD dashboards for operations teamsnot NATS
  • Versioning applications through Gitnot NATS

NATS

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

Where each one falls short

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

Appsmith

  • The free cloud tier is capped at 5 users, 5 workspaces and 3 Git repositories
  • Workflows, custom roles and audit logs all require the Business plan at $15 per user per month
  • SAML and OIDC single sign-on need Enterprise, which starts at $2,500 a month with a 100 user minimum
  • Embedding an app privately is Enterprise only; the lower tiers embed publicly
  • Managed hosting is an Enterprise add-on rather than an included option

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

Appsmith

Free
  • FreeFree
    • Up to 5 users on cloud
    • 5 workspaces
    • 3 Git repos
  • Business$15/user/mo
    • Up to 99 users
    • Unlimited workspaces and Git repos
    • Workflows and reusable packages
  • Enterprise$2,500/mo
    • Minimum 100 users
    • Unlimited users above 100
    • SAML/OIDC SSO

NATS

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

Which should you pick?

Choose Appsmith if

  • You need drag-and-drop builder.
  • You want to start without paying.
  • You work on Web, Self-hosted.
  • You also want database integration.
Appsmith review

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

Questions people ask

Is Appsmith or NATS better?
Neither clearly leads. Appsmith 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, Appsmith or NATS?
Appsmith starts at Free and NATS at Free.
Does Appsmith or NATS run on more platforms?
Appsmith runs on Web, Self-hosted. NATS runs on Linux, macOS, Windows, Self-hosted.
Can I use Appsmith for free?
Both have a free tier, so you can try either at no cost before committing.
What is Appsmith best used for?
Appsmith is most often used for building internal admin panels over existing databases and apis, self-hosting a low-code internal tool platform, custom crud dashboards for operations teams, versioning applications through git. Of those, building internal admin panels over existing databases and apis and self-hosting a low-code internal tool platform are not what NATS is typically brought in for.
What can Appsmith do that NATS cannot?
Appsmith covers Drag-and-drop builder, Database integration, REST API, Workflows. NATS covers Very low latency, JetStream, Single binary, Request-reply.

Answered from the vendors’ own pages

Appsmith: How much does Appsmith cost?

Appsmith offers a free plan for up to 5 users, a Business plan at $15 per user per month (up to 99 users), and an Enterprise plan starting at $2,500 per month for a minimum of 100 users with unlimited users available at that rate.

Source
NATS: Is NATS free?

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

Appsmith: Does Appsmith have a free version?

Yes, Appsmith's Free plan provides access for up to 5 users with 5 workspaces, 3 Git repos, and community support at no cost. All plans offer unlimited apps.

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.

Appsmith: What does the Business plan include compared to Free?

The Business plan at $15 per user per month supports up to 99 users, provides unlimited workspaces and Git repos, includes workflows and reusable packages, premium integrations, custom roles, and access controls with email and chat support compared to the Free plan's community support only.

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.

Appsmith: How are Appsmith users counted for billing purposes?

Appsmith counts any user who builds or edits applications as a standard user for billing. Developers and builders are treated the same as other users and all users count toward the per-user billing model without separate developer seat charges.

Source
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