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APIs · head to head

Asyncapi vs Pulumi

Asyncapi logo

Asyncapi

APIs

Specification and tools for defining asynchronous APIs

From
Free
Rated
-
Full reviewWebsite
Pulumi logo

Pulumi

Cloud

Modern infrastructure as code using programming languages

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Asyncapi complex to implement and debug asynchronous operations due to their non-linear and concurrent nature; Pulumi the free Individual plan allows one user and one concurrent stack update
  • They diverge on capability: Asyncapi covers API Specification, Pulumi covers Multi-language support.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Asyncapi and Pulumi actually diverge.

Attributes where Asyncapi and Pulumi differ
AttributeAsyncapiPulumi
Pricing modelopen-sourcesubscription
PlatformsWeb, CLI, IDE ExtensionsLinux, Windows, Mac, Api
CategoryAPIsCloud
Founded20192017

Identical on both: starting price (Free), 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 Asyncapi

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

Only in Pulumi

  • Multi-language support
  • Multi-cloud
  • State management
  • Secrets management
  • RBAC
  • Stacks
  • Automation API
  • Policy as Code

What people use each for

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

Asyncapi

  • API Developmentnot Pulumi
  • API Gatewaynot Pulumi
  • API Testingnot Pulumi
  • API Documentationnot Pulumi
  • Microservicesnot Pulumi

Pulumi

  • Infrastructure as codenot Asyncapi
  • Cloud resource provisioningnot Asyncapi
  • DevOps automationnot Asyncapi
  • Multi-cloud managementnot Asyncapi

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

Pulumi

  • The free Individual plan allows one user and one concurrent stack update
  • The Team plan is $40 per month base including 40 credits, and caps the organisation at 10 users
  • SAML/SSO, RBAC, audit logs and drift detection require the Enterprise plan at $400 per month base
  • The per-resource rate rises from $0.1825 per resource per month on Team to $0.365 on Enterprise, so upgrading raises the unit price as well as the base fee
  • Managed secrets are billed separately at $0.50 per secret per month on Team and $0.75 on Enterprise
  • Self-hosting, SCIM user sync, audit log export and 24x7 support are only in Business Critical, which is custom priced with no published rate
  • Team includes up to 500 resources and Enterprise up to 2,000, with everything beyond billed on demand as credits

Pricing, plan by plan

Asyncapi

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

Pulumi

Free
  • IndividualFree
    • 1 user
    • Unlimited projects/stacks
    • 500 workflow minutes monthly
  • Team$40/month
    • Up to 10 users
    • Secure collaboration
    • CI/CD integration
  • Enterprise$400/month
    • Unlimited users
    • SAML/SSO
    • RBAC
  • Business Critical$null/custom
    • Self-hosting
    • Advanced compliance
    • SCIM integration

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 Pulumi if

  • You need multi-language support.
  • You want to start without paying.
  • You work on Linux, Windows, Mac, Api.
  • You also want multi-cloud.
Pulumi review

Questions people ask

Is Asyncapi or Pulumi better?
Neither clearly leads. Asyncapi starts at Free and Pulumi at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Asyncapi or Pulumi?
Asyncapi starts at Free and Pulumi at Free.
Does Asyncapi or Pulumi run on more platforms?
Asyncapi runs on Web, CLI, IDE Extensions. Pulumi runs on Linux, Windows, Mac, Api.
Can I use Asyncapi for free?
Both have a free tier, so you can try either at no cost before committing.
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 Pulumi is typically brought in for.
What can Asyncapi do that Pulumi cannot?
Asyncapi covers API Specification, Code generation, Documentation, Multiple messaging protocols. Pulumi covers Multi-language support, Multi-cloud, State management, Secrets management.

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
Pulumi: How much does Pulumi cost?

Pulumi offers a free Individual tier forever, Team plan at $40/month with 40 credits, and Enterprise at $400/month with 400 credits. Credit usage varies by resource type and workflow needs.

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
Pulumi: What is included in the Pulumi free tier?

The free Individual tier includes 1 user, unlimited projects/stacks, 500 workflow minutes monthly, and 5 million Neo tokens free.

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
Pulumi: How are Pulumi credits charged?

1 Pulumi Credit equals $1 USD. Credits are drawn from a shared pool. IaC resources cost $0.1825/month per resource on Team and $0.365 on Enterprise; ESC secrets cost $0.50-$0.75/month; workflow minutes cost $0.01 each.

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
Pulumi: Does Pulumi offer volume discounts?

Yes, the Enterprise tier ($400/month) includes volume discounts and is designed for approximately 2,000 IaC resources.

Source
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