Side by side
AsyncAPI Studio vs MockServer
Both stand on api design tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan ExtensionLinuxMac+3
AsyncAPI Studio brings document editing, validation, previews, and event-flow visualization together, with options for browser or self-hosted use. Check its browser restrictions for local folders and the project’s under-development status before adopting it.
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Free plan APILinuxMac+3
MockServer covers mocking, proxying, verification, and chaos testing across a broad set of protocols and deployment options. Its always-reachable health probes are a security detail to account for when configuring an instance.
Visit MockServerThe facts
| AsyncAPI Studio | MockServer | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Extension, Linux, Mac, Self-hosted, Web, Windows | API, Linux, Mac, Self-hosted, Web, Windows |
| Lowest paid plan | Not published | Free or on request |
| Plans published | None | 1 |
| Maker | Not published | Not published |
| Website | studio.asyncapi.com | mock-server.com |
| On api design tools | #9 of 26 | #5 of 26 |
AsyncAPI Studio: what it does well
- Creates, validates, and converts AsyncAPI documents.
- Supports JSON, YAML, Avro, and JSON Schema references.
- Can import remote files and resolve relative references.
- Offers Markdown and Avro viewers with Mermaid diagrams.
- Can run locally, in Docker, or as a browser tool.
What to know first
- Local folder access is unavailable in Firefox and Safari.
- Folder permission must be granted again each session.
- CLI installation downloads about 450 MB on demand.
- The project may have breaking changes while under development.
MockServer: what it does well
- Free, self-hosted deployment with no SaaS account
- Mocks and validates against OpenAPI or Swagger
- Imports HAR files and Postman collections
- Supports multiple official language clients
- Dashboard shows live logs and recorded traffic
What to know first
- Status and readiness probes need no authentication
- HTTP/3 support is experimental and uses a separate UDP port
Alternatives to AsyncAPI Studio Alternatives to MockServer The whole list