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API Management · head to head

KeystoneJS vs Asyncapi

KeystoneJS logo

KeystoneJS

API Management

Powerful Node.js headless CMS framework and API platform

From
Free
Rated
-
Full reviewWebsite
Asyncapi logo

Asyncapi

API Management

Specification and tools for defining asynchronous APIs

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: KeystoneJS database support is limited to PostgreSQL, MySQL and SQLite; Asyncapi complex to implement and debug asynchronous operations due to their non-linear and concurrent nature
  • They diverge on capability: KeystoneJS covers REST API, Asyncapi covers API Specification.

Where they differ

Only the attributes on which KeystoneJS and Asyncapi actually diverge.

Attributes where KeystoneJS and Asyncapi differ
AttributeKeystoneJSAsyncapi
PlatformsNode.js, Self-hostedWeb, CLI, IDE Extensions
Founded20162019

Identical on both: starting price (Free), pricing model (open-source), free tier (Yes), user rating (Not yet rated), category (API Management).

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 KeystoneJS

  • REST API
  • GraphQL API
  • Admin interface
  • Node.js
  • Next.js
  • React
  • Databases
  • Node.js support

Only in Asyncapi

  • API Specification
  • Code generation
  • Documentation
  • Multiple messaging protocols
  • Code generators
  • Specification support
  • Tools support
  • CLI support

What people use each for

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

KeystoneJS

  • Building a headless CMS with a GraphQL API from a TypeScript schemanot Asyncapi
  • Generating a configurable Admin UI for editorsnot Asyncapi
  • Adding structured rich text content with the document fieldnot Asyncapi

Asyncapi

  • API Developmentnot KeystoneJS
  • API Gatewaynot KeystoneJS
  • API Testingnot KeystoneJS
  • API Documentationnot KeystoneJS
  • Microservicesnot KeystoneJS

Where each one falls short

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

KeystoneJS

  • Database support is limited to PostgreSQL, MySQL and SQLite
  • Keystone 5 is a separate legacy product documented on a different site and is not covered by the Keystone 6 docs
  • Upgrading requires following a dedicated Migrate to 8.0.0 guide, so major versions are not drop-in
  • Free support is a community Slack; enterprise-grade consulting and support is a separate paid engagement with Thinkmill and no published price

Asyncapi

  • Complex to implement and debug asynchronous operations due to their non-linear and concurrent nature
  • Keeping AsyncAPI documents up to date is challenging as systems evolve
  • Tracing and debugging asynchronous operations is more difficult than synchronous request-response patterns

Pricing, plan by plan

KeystoneJS

Free
  • Open SourceFree
    • Full KeystoneJS
    • Community support

Asyncapi

Free
  • Open SourceFree
    • AsyncAPI specification
    • Tools
    • Community support

Which should you pick?

Choose KeystoneJS if

  • You need rest api.
  • You want to start without paying.
  • You work on Node.js, Self-hosted.
  • You also want graphql api.
KeystoneJS review

Choose Asyncapi if

  • You need api specification.
  • You want to start without paying.
  • You work on Web, CLI, IDE Extensions.
  • You also want code generation.
Asyncapi review

Questions people ask

Is KeystoneJS or Asyncapi better?
Neither clearly leads. KeystoneJS starts at Free and Asyncapi at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, KeystoneJS or Asyncapi?
KeystoneJS starts at Free and Asyncapi at Free.
Does KeystoneJS or Asyncapi run on more platforms?
KeystoneJS runs on Node.js, Self-hosted. Asyncapi runs on Web, CLI, IDE Extensions.
Can I use KeystoneJS for free?
Both have a free tier, so you can try either at no cost before committing.
What is KeystoneJS best used for?
KeystoneJS is most often used for building a headless cms with a graphql api from a typescript schema, generating a configurable admin ui for editors, adding structured rich text content with the document field. Of those, building a headless cms with a graphql api from a typescript schema and generating a configurable admin ui for editors are not what Asyncapi is typically brought in for.
What can KeystoneJS do that Asyncapi cannot?
KeystoneJS covers REST API, GraphQL API, Admin interface, Node.js. Asyncapi covers API Specification, Code generation, Documentation, Multiple messaging protocols.

Answered from the vendors’ own pages

Asyncapi: What is AsyncAPI used for?

AsyncAPI is an open-source specification for defining and documenting asynchronous APIs, message-driven systems, and event-driven architectures. It serves the same purpose for async APIs as OpenAPI does for REST APIs, providing standardized documentation, code generation, and tooling.

Source
Asyncapi: Is AsyncAPI free to use?

Yes, AsyncAPI is completely free and open-source. It is hosted by the Linux Foundation and supported by community contributions and sponsorships from companies like Postman, IBM, IQVIA Technology, and Solace.

Source
Asyncapi: What protocols and technologies does AsyncAPI support?

AsyncAPI supports multiple protocols and technologies including Kafka, RabbitMQ, MQTT, Socket.IO, AWS EventBridge, and others. It provides language support for JavaScript/TypeScript, Python, Java, Go, C#/.NET, Kotlin, and PHP.

Source
Asyncapi: Does AsyncAPI have IDE support?

Yes, AsyncAPI has IDE extensions available for VSCode and IntelliJ, along with CLI utilities and GitHub Actions integration for developers.

Source

Related pages

More on KeystoneJS

More on Asyncapi

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