Comparison

json-server vs WireMock

On the evidence we track, json-server leads this comparison with a composite score of 63/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

json-server full profile →WireMock full profile →

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.

★json-server63

WireMock55

Attribute comparison across 2 tools
Attribute	json-serverLeader	WireMock
vioscaleAI score	63 / 100medium · 64%	55 / 100low · 17%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	open_source	open_source
Price levelpricing.price_level	free	free
Transparentpricing.transparent	✓	-
Integrations
Countintegrations.count	-	5
Security
Scorecardsecurity.scorecard	3.6	-
Trust centersecurity.trust_center	https://github.com/security	-
Vulnerabilitiessecurity.vulnerabilities	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=json-server&per_page=100 · Last 12m: 0	-
Adoption
Dependent reposadoption.dependent_repos	85,674	-
Github starsadoption.github_stars	75,731	-
Release
Cadence daysrelease.cadence_days	6	-
Historyrelease.history	20 items	-
License
Spdxlicense.spdx	MIT	-
Language
Primarylanguage.primary	JavaScript	-
Market
Availabilitymarket.availability	-	Available worldwide
Content
Faqcontent.faq	5 items	5 items

Score

vioscaleAI score

json-server63 / 100medium · 64%

WireMock55 / 100low · 17%

Pricing

Free tier

json-server✓

WireMock✓

Model

json-serveropen_source

WireMockopen_source

Price level

json-serverfree

WireMockfree

Transparent

json-server✓

WireMock–

Integrations

Count

json-server–

WireMock5

Security

Scorecard

json-server3.6

WireMock–

Trust center

json-serverhttps://github.com/security

WireMock–

Vulnerabilities

json-serverCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=json-server&per_page=100 · Last 12m: 0

WireMock–

Adoption

Dependent repos

json-server85,674

WireMock–

Github stars

json-server75,731

WireMock–

Release

Cadence days

json-server6

WireMock–

History

json-server20 items

WireMock–

License

Spdx

json-serverMIT

WireMock–

Language

Primary

json-serverJavaScript

WireMock–

Market

Availability

json-server–

WireMockAvailable worldwide

Content

Faq

json-server5 items

WireMock5 items

Capabilities

Feature-by-feature on the axes that matter for api mocking. “-” means undocumented, not absent.

Capability comparison for API Mocking
Capability	json-server	WireMock
Capabilities
Mocking mode	Static	Dynamic templating
Stateful scenarios	-	✓
Fault chaos injection	-	✓
Openapi import	-	✓
Proxy passthrough	-	-
Admin API	-	✓
Deployment	CLI binary	-
Legacy protocol virtualization	-	✓
Collaboration sharing	-	✓
Ci cd integration	-	✓
Open source	✓	✓
Market segment	Dev tool	Dev tool
Pricing model	Open source	Freemium

Capabilities

Mocking mode

json-serverStatic

WireMockDynamic templating

Stateful scenarios

json-server-

WireMock✓

Fault chaos injection

json-server-

WireMock✓

Openapi import

json-server-

WireMock✓

Proxy passthrough

json-server-

WireMock-

Admin API

json-server-

WireMock✓

Deployment

json-serverCLI binary

WireMock-

Legacy protocol virtualization

json-server-

WireMock✓

Collaboration sharing

json-server-

WireMock✓

Ci cd integration

json-server-

WireMock✓

Open source

json-server✓

WireMock✓

Market segment

json-serverDev tool

WireMockDev tool

Pricing model

json-serverOpen source

WireMockFreemium

What each one is

The product in its own terms, so the numbers below have context.

json-server

Leader

An open-source tool that generates a full-featured REST API server from a JSON or JSON5 file, enabling rapid prototyping and testing without backend development.

Independently observed

WireMock

Enables developers to test client applications against mock APIs without relying on external services, supporting various protocols like REST, SOAP, and OAuth2.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

json-server

Leader

Open sourceFree tier

Free, open-source

as of 2026-08-17verify ↗

WireMock

Open sourceFree tier

as of 2026-09-23verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	json-server	WireMock
WebPlatforms	✓	✓
CLIPlatforms	✓	✓
Self-hostedDeployment	✓	✓
On-premiseDeployment	✗	✓

Platforms

Web

json-server✓

WireMock✓

CLI

json-server✓

WireMock✓

Deployment

Self-hosted

json-server✓

WireMock✓

On-premise

json-server✗

WireMock✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

json-server

Leader

Not documented yet.

WireMock

8 total

JUnit
Spring Boot
Testcontainers
Docker
Maven
Gradle
OpenAPI
gRPC

Independently observed

Still deciding?

json-server or WireMock: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.