Prism
A collaborative platform for designing and developing APIs using OpenAPI specifications
- Also known as
- prism
Available worldwide
What is Prism?
Stoplight is a design-first API platform that enables teams to collaboratively design APIs, generate interactive documentation, and create mock API servers with built-in validation. It supports multiple API standards including OpenAPI, AsyncAPI, and Arazzo.
Prism pricing
Plans, per-tier features and add-ons, dated and linked to live pricing. Pricing changes often; always verify at source before you rely on it.
Free open-source version. Stoplight SaaS: from $44/month (Basic). Free 14-day trial.
Free
FreeOpen-source, self-hosted version
- users
- 1
- projects
- 1
- API editor
- OpenAPI/JSON schema visual designer
- Code-based editing
- Local mock servers
- API console
- Technical knowledge base
- 24x7 knowledge base access
Basic
Design an API as an individual
- users
- 3
- projects
- Unlimited
- OpenAPI/JSON schema visual designer
- Interactive docs
- Instant mock servers
- Code-based editing
- Schema reuse
- Design validation
- Git sync
- OpenAPI export
- Automatic mock servers
- Request validation
- Configurable response codes
Startup
Build an API program for small teams
- users
- 8
- projects
- Unlimited
- All Basic features
- Private projects
- Multi-branch support
- Custom domains, theming and favicon
- Google Analytics integration
- Approved email domains
- Automatic changelogs
- Dependency graph
Pro Team
Govern APIs across your organization
- teams
- 20
- users
- 15
- projects
- Unlimited
- All Startup features
- Shared style guides
- Workspace groups
- Remove Stoplight branding
- Self-hosted Git providers
- Activity logs
- LDAP & SAML SSO
- Component Libraries
- User management and RBAC
- Per-project user access
- Workspace teams
Enterprise
Contact salesYour API program at scale
- teams
- Unlimited
- users
- Unlimited
- projects
- Unlimited
- All Pro Team features
- Custom payment terms
- Invoicing
- Priority support
What Prism does
The capabilities that matter for api mocking, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Mocking mode
- 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
- Pricing model
- Open source
Platform & deployment
Independently observed- Web
- Cloud / SaaS
- Self-hosted
Integrations (9)
Independently observed- GitHub
- GitLab
- Azure DevOps
- Bitbucket
- LDAP
- SAML SSO
- Google Analytics
- OpenAPI•
- Postman•
Prism FAQ
Common questions about Prism, answered from independent, dated evidence.
What is Prism?
Open-source toolkit for generating realistic mock HTTP servers from API specifications and validating API contracts It is indexed under API Mocking.
Is Prism free to use?
Prism is open source, so it can be self-hosted and used at no licence cost. A commercial or hosted edition starts at $11 per user per month. Prices are published openly on the vendor's own pricing page. Pricing changes often, so verify at source before relying on it.
Source: https://stoplight.io/pricing
What platforms does Prism support?
Prism supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.
Can Prism be self-hosted?
Yes. Prism can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.
What does Prism integrate with?
We have confirmed 9 integrations for Prism, including GitHub, GitLab, Azure DevOps, Bitbucket, LDAP, SAML SSO, Google Analytics and OpenAPI, plus 1 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.
What security certifications does Prism have?
We have independently confirmed GDPR for Prism. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Prism not holding them. Always confirm compliance directly before you rely on it.
Prism alternatives
Other api mocking we track, ranked by the same independent score.
- BeeceptorCreate and manage mock API servers for testing and developmentmedium · 74%
- Mockoonmedium · 72%
- json-serverRapidly create a mock REST API from JSON data for development and testingmedium · 64%
- Mock Service Worker (MSW)A reusable API mocking library that intercepts network requests for testing and development across JavaScript environmentshigh · 79%
- NockA Node.js library for mocking HTTP interactions in testsmedium · 67%
- WireMockAn open source tool for creating and testing mock APIslow · 17%
Compare Prism
Side by side against other api mocking, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Prism, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Capabilities | 75 | 0.08 | 6.2 | ✓ |
| Integrations | 9 | 0.05 | 0.5 | ✓ |
| Stars | 0 | 0.03 | 0.0 | - |
| Dependent projects | 0 | 0.08 | 0.0 | - |
| Development activity | 0 | 0.12 | 0.0 | - |
| Release cadence | 0 | 0.07 | 0.0 | - |
| Security posture | 5 | 0.09 | 0.0 | - |
| Package downloads | 0 | 0.17 | 0.0 | - |
| Security score | 0 | 0.05 | 0.0 | - |
| Developer Q&A activity | 0 | 0.08 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 6 items | mediumsource · 2026-09-10 · 62% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Deployment: cli_binary · Open source: Yes · Mocking mode: dynamic_templating · Pricing model: open_source · Market segment: dev-tool · Openapi import: Yes | mediumsource · 2026-09-24 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 1 | mediumsource · 2026-09-24 · 60% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | highsource · 2026-08-17 · 75% |
Pricing
Security
| Attribute | Value | Evidence |
|---|---|---|
| Gdpr | Yes | highsource · 2026-08-17 · 75% |
Is Prism the right choice for you?
Tell us the job, the constraints and what you weigh most, and we will rank Prism against the rest of the api mocking we index, using the same dated evidence weighted your way.
Free to run, no account needed to start. How the evaluation works
Is this your product?
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Verify you control the domain, then point us at the pages that state the facts about Prism and add your own description and media. Free, and it does not change the score.
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- Point our crawler at the pages that matter
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