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Asyncapi vs Zephyr Scale

Asyncapi logo

Asyncapi

Software

Specification and tools for defining asynchronous APIs

From
Free
Rated
-
Full reviewWebsite
Z

Zephyr Scale

Software

Native test management for Jira

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Asyncapi has a free tier, so it costs nothing to try first.
  • Each has a real cost: Asyncapi complex to implement and debug asynchronous operations due to their non-linear and concurrent nature; Zephyr Scale split across separate Essential and Advanced editions plus a distinct Zephyr Enterprise on-premises product, so buyers must pick the right SKU before pricing applies

Where they differ

Only the attributes on which Asyncapi and Zephyr Scale actually diverge.

Attributes where Asyncapi and Zephyr Scale differ
AttributeAsyncapiZephyr Scale
Starting priceFreeOn request
Pricing modelopen-sourcesubscription
Free tierYesNo
PlatformsWeb, CLI, IDE ExtensionsWeb
Founded2019Unknown

Identical on both: user rating (Not yet rated), category (Unknown).

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 Asyncapi

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

Only in Zephyr Scale

Nothing recorded that Asyncapi does not also cover.

What people use each for

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

Asyncapi

  • API Developmentnot Zephyr Scale
  • API Gatewaynot Zephyr Scale
  • API Testingnot Zephyr Scale
  • API Documentationnot Zephyr Scale
  • Microservicesnot Zephyr Scale

Zephyr Scale

No use cases recorded yet. See the Zephyr Scale review.

Where each one falls short

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

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

Zephyr Scale

  • Split across separate Essential and Advanced editions plus a distinct Zephyr Enterprise on-premises product, so buyers must pick the right SKU before pricing applies

Pricing, plan by plan

Asyncapi

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

Zephyr Scale

On request

No published plan breakdown. See the Zephyr Scale review.

Which should you pick?

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

Choose Zephyr Scale if

Nothing in the data separates Zephyr Scale from Asyncapi on the points above - pick on price and on how each one feels to use.

Zephyr Scale review

Questions people ask

Is Asyncapi or Zephyr Scale better?
Neither clearly leads. Asyncapi starts at Free and Zephyr Scale at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Asyncapi or Zephyr Scale?
Asyncapi has a free tier; the other does not. Paid plans start at Free for Asyncapi and On request for Zephyr Scale.
Does Asyncapi or Zephyr Scale run on more platforms?
Asyncapi runs on Web, CLI, IDE Extensions. Zephyr Scale runs on Web.
Can I use Asyncapi for free?
Yes. Asyncapi has a free tier, so you can try it without paying. Zephyr Scale starts at On request.
What is Asyncapi best used for?
Asyncapi is most often used for api development, api gateway, api testing, api documentation. Of those, api development and api gateway are not what Zephyr Scale is typically brought in for.
What can Asyncapi do that Zephyr Scale cannot?
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
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