# Nock vs Parasoft Virtualize

**Leader by vioscaleAI score:** Nock

| Attribute | Nock | Parasoft Virtualize |
|---|---|---|
| **vioscaleAI score** | 55.7 (67% (medium)) | 50.4 (19% (low)) |
| activity.commits_last_30d | 3 | - |
| adoption.dependent_repos | 130,286 | - |
| adoption.github_stars | 13,128 | - |
| content.faq | `[{"answer":"An open-source library that allows developers to test modules making HTTP requests without external dependencies by mocking server responses. It is indexed under API Mocking.","source":"https://github.com/pricing","question":"What is Nock?","confidence":0.6},{"answer":"Nock is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Pricing changes often, so verify at source before relying on it.","source":"https://github.com/pricing","question":"Is Nock free to use?","confidence":0.6},{"answer":"Yes. Nock is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/nock/nock","question":"Is Nock open source?","confidence":0.95}]` | `[{"answer":"A codeless tool that creates virtual versions of APIs and services for testing across 120+ protocols and message formats, with AI-powered mock generation and stateful simulation capabilities It is indexed under API Mocking.","source":"https://www.parasoft.com/products/parasoft-virtualize/","question":"What is Parasoft Virtualize?","confidence":0.6},{"answer":"We have confirmed browser-based access to Parasoft Virtualize. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://www.parasoft.com/products/parasoft-virtualize/","question":"What platforms does Parasoft Virtualize support?","confidence":0.6},{"answer":"We have confirmed 11 integrations for Parasoft Virtualize, including REST, SOAP, JMS, MQ, JDBC, Kafka, gRPC and Jenkins, plus 3 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://www.parasoft.com/products/parasoft-virtualize/","question":"What does Parasoft Virtualize integrate with?","confidence":0.6},{"answer":"Parasoft Virtualize is available worldwide. The vendor is headquartered in the United States.","source":"https://www.parasoft.com/products/parasoft-selenic/plans-pricing/","question":"Where is Parasoft Virtualize available?","confidence":0.75}]` |
| description.long | A Node.js library that intercepts HTTP requests in tests, allowing you to test modules that make HTTP calls in isolation without hitting real external services. | Parasoft Virtualize provides a codeless platform for creating simulated API and service dependencies across 120+ protocols. Teams can generate lightweight API mocks or stateful virtual services for testing, with direct integration into CI/CD pipelines and support for AI-driven workflows. |
| features.capabilities | `{"deployment":"embedded_library","open_source":true,"mocking_mode":"dynamic_templating","pricing_model":"open_source","market_segment":"dev-tool","proxy_passthrough":true}` | `{"deployment":"browser","mocking_mode":"dynamic_templating","market_segment":"dev-tool","ci_cd_integration":true,"proxy_passthrough":true,"stateful_scenarios":true,"fault_chaos_injection":true,"legacy_protocol_virtualization":true}` |
| integrations.count | - | 11 |
| integrations.list | - | `[{"name":"REST"},{"name":"SOAP"},{"name":"JMS"},{"name":"MQ"},{"name":"JDBC"},{"name":"Kafka"},{"name":"gRPC"},{"name":"Jenkins"},{"name":"Azure DevOps"},{"name":"TeamCity"},{"name":"Bamboo"}]` |
| language.primary | JavaScript | - |
| license.spdx | MIT | - |
| market.availability | - | `{"hqCountry":"US","primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | - | `{"web":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://github.com/pricing","retrievedAt":"2026-09-13T19:29:56.350Z"}` | - |
| pricing.free_tier | yes | - |
| pricing.model | open_source | commercial |
| pricing.price_level | free | - |
| release.cadence_days | 12 | - |
| release.history | `[{"url":"https://github.com/nock/nock/releases/tag/v15.0.1","date":"2026-10-06T20:53:29Z","type":"stable","version":"v15.0.1"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.16","date":"2026-10-05T19:23:05Z","type":"prerelease","version":"v15.0.0-beta.16"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0","date":"2025-09-29T21:26:04Z","type":"prerelease","version":"v15.0.0"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.15","date":"2026-09-21T19:47:59Z","type":"prerelease","version":"v15.0.0-beta.15"},{"url":"https://github.com/nock/nock/releases/tag/v14.0.17","date":"2026-07-30T18:31:48Z","type":"stable","version":"v14.0.17"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.14","date":"2026-07-22T20:30:03Z","type":"prerelease","version":"v15.0.0-beta.14"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.13","date":"2026-07-22T20:25:54Z","type":"prerelease","version":"v15.0.0-beta.13"},{"url":"https://github.com/nock/nock/releases/tag/v14.0.16","date":"2026-06-26T07:56:17Z","type":"stable","version":"v14.0.16"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.12","date":"2026-05-13T17:49:47Z","type":"prerelease","version":"v15.0.0-beta.12"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.11","date":"2026-05-07T19:33:41Z","type":"prerelease","version":"v15.0.0-beta.11"},{"url":"https://github.com/nock/nock/releases/tag/v14.0.15","date":"2026-05-07T14:32:05Z","type":"stable","version":"v14.0.15"},{"url":"https://github.com/nock/nock/releases/tag/v14.0.14","date":"2026-04-30T19:55:09Z","type":"stable","version":"v14.0.14"},{"url":"https://github.com/nock/nock/releases/tag/v14.0.13","date":"2026-04-20T20:49:07Z","type":"stable","version":"v14.0.13"},{"url":"https://github.com/nock/nock/releases/tag/v14.0.12","date":"2026-04-05T20:18:44Z","type":"stable","version":"v14.0.12"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.10","date":"2026-02-27T11:45:30Z","type":"prerelease","version":"v15.0.0-beta.10"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.9","date":"2026-02-14T22:32:01Z","type":"prerelease","version":"v15.0.0-beta.9"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.8","date":"2026-02-09T20:35:05Z","type":"prerelease","version":"v15.0.0-beta.8"},{"url":"https://github.com/nock/nock/releases/tag/v14.0.11","date":"2026-02-09T19:51:20Z","type":"stable","version":"v14.0.11"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.7","date":"2025-11-29T20:46:37Z","type":"prerelease","version":"v15.0.0-beta.7"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.6","date":"2025-08-26T19:32:51Z","type":"prerelease","version":"v15.0.0-beta.6"}]` | - |
| security.scorecard | 5.4 | - |
| security.trust_center | https://github.com/security | https://www.parasoft.com/blog/iso-pas-8800-compliance/ |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=nock&per_page=100","last_12m":0,"max_severity":null}` | - |

## Capabilities (API Mocking)

| Capability | Nock | Parasoft Virtualize |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Mocking mode | Dynamic templating | Dynamic templating |
| Stateful scenarios | - | ✓ |
| Fault chaos injection | - | ✓ |
| Openapi import | - | - |
| Proxy passthrough | ✓ | ✓ |
| Admin API | - | - |
| Deployment | Embedded library | Browser |
| Legacy protocol virtualization | - | ✓ |
| Collaboration sharing | - | - |
| Ci cd integration | - | ✓ |
| Open source | ✓ | - |
| Market segment | Dev tool | Dev tool |
| Pricing model | Open source | - |

*Source: vioscaleAI. Generated 2026-10-16T20:14:32.810Z. "-" = undocumented, not absent.*