Comparison

json-server vs Prism

No clear leader: json-server (81.6) and Prism (76.7) are within the 5-point margin; treat as a tie. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.

json-server full profile →Prism full profile →

Machine formatsJSON Markdown GraphQLor send Accept: application/json

json-server82

Prism77

Attribute comparison across 2 tools
Attribute	json-server	Prism
Vioscale score	82 / 100medium · 57%	77 / 100high · 78%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	commercial	freemium
Price levelpricing.price_level	free	low
Transparentpricing.transparent	✓	✓
Integrations
Countintegrations.count	-	6
Security
Gdprsecurity.gdpr	-	✓
Scorecardsecurity.scorecard	3.6	-
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	75,690	-
Release
Cadence daysrelease.cadence_days	6	-
Historyrelease.history	20 items	-
License
Spdxlicense.spdx	MIT	-
Language
Primarylanguage.primary	JavaScript	-
Market
Availabilitymarket.availability	-	Available worldwide

Score

Vioscale score

json-server82 / 100medium · 57%

Prism77 / 100high · 78%

Pricing

Free tier

json-server✓

Prism✓

Model

json-servercommercial

Prismfreemium

Price level

json-serverfree

Prismlow

Transparent

json-server✓

Prism✓

Integrations

Count

json-server–

Prism6

Security

Gdpr

json-server–

Prism✓

Scorecard

json-server3.6

Prism–

Vulnerabilities

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

Prism–

Adoption

Dependent repos

json-server85,674

Prism–

Github stars

json-server75,690

Prism–

Release

Cadence days

json-server6

Prism–

History

json-server20 items

Prism–

License

Spdx

json-serverMIT

Prism–

Language

Primary

json-serverJavaScript

Prism–

Market

Availability

json-server–

PrismAvailable worldwide

Capabilities

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

Capability comparison for API Mocking
Capability	json-server	Prism
Capabilities
Mocking mode	-	-
Stateful scenarios	-	-
Fault chaos injection	-	-
Openapi import	-	-
Proxy passthrough	-	-
Admin API	-	-
Deployment	-	-
Legacy protocol virtualization	-	-
Collaboration sharing	-	-
Ci cd integration	-	-
Open source	-	-
Market segment	-	-
Pricing model	-	-

Capabilities

Mocking mode

json-server-

Prism-

Stateful scenarios

json-server-

Prism-

Fault chaos injection

json-server-

Prism-

Openapi import

json-server-

Prism-

Proxy passthrough

json-server-

Prism-

Admin API

json-server-

Prism-

Deployment

json-server-

Prism-

Legacy protocol virtualization

json-server-

Prism-

Collaboration sharing

json-server-

Prism-

Ci cd integration

json-server-

Prism-

Open source

json-server-

Prism-

Market segment

json-server-

Prism-

Pricing model

json-server-

Prism-

What each one is

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

json-server

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

Prism

A tool that generates mock HTTP servers from OpenAPI v2 and v3 documents, enabling frontend and backend teams to develop in parallel. It supports request and response validation, dynamic example generation, callbacks, and can function as a validation proxy to identify discrepancies between API documentation and implementation.

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

Open sourceFree tier

Free, open-source

as of 2026-08-17verify ↗

Prism

from $11/moHybridFree tier14-day trial

Free open-source version. Stoplight SaaS: from $44/month (Basic). Free 14-day trial.

FreeFree
- API editor
- OpenAPI/JSON schema visual designer
- Code-based editing
- Local mock servers
- API console
- +2 more
Basic$44/month (annually) or $56/month; includes 3 users, $11 per additional user
- OpenAPI/JSON schema visual designer
- Interactive docs
- Instant mock servers
- Code-based editing
- Schema reuse
- +6 more
Startup$113/month (annually) or $147/month; includes 8 users, $11 per additional user
- All Basic features
- Private projects
- Multi-branch support
- Custom domains, theming and favicon
- Google Analytics integration
- +3 more
Pro Team$362/month (annually) or $453/month; includes 15 users, $22 per additional user
- All Startup features
- Shared style guides
- Workspace groups
- Remove Stoplight branding
- Self-hosted Git providers
- +6 more
EnterpriseContact sales
- All Pro Team features
- Custom payment terms
- Invoicing
- Priority support

as of 2026-08-17verify ↗

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	Prism
WebPlatforms	✓	✓
CLIPlatforms	✓	✓
Cloud / SaaSDeployment	✗	✓
Self-hostedDeployment	✓	✓

Platforms

Web

json-server✓

Prism✓

CLI

json-server✓

Prism✓

Deployment

Cloud / SaaS

json-server✗

Prism✓

Self-hosted

json-server✓

Prism✓

Integrations

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

json-server

Not documented yet.

Prism

7 total

GitHub
GitLab
Azure DevOps
Bitbucket
LDAP
SAML SSO
Google Analytics

Independently observed

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