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Comparison of API simulation tools

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The tools listed here support emulating[1] or simulating APIs and software systems. They are also called[2] API mocking tools, service virtualization tools, over the wire test doubles and tools for stubbing and mocking HTTP(S) and other protocols.[1] They enable component testing in isolation.[3]

In alphabetical order by name (click on a column heading to sort by that column):

Name FOSS Free Supported protocols and APIs Has a GUI Scriptable/Programmable Docker support Cloud offering
API Simulator No; Proprietary[4] Yes HTTP/2 with TLS ALPN; HTTP/2 with prior knowledge; HTTP/2 upgrade from HTTP/1.1; HTTP/1.x with and without TLS/SSL; HTTP(S) Yes[5] Yes[6][7] Yes[8] No
apiUi Yes; GPL v3.0[9] Yes HTTP(S); STOMP, Wsdl; Swagger; OpenApi; Cobol Yes[10] Yes[11] Yes[12] No
Beeceptor [13] No; Proprietary[14] Yes (Free plan) HTTP1.1; HTTP2; HTTP(S); SOAP, MITM/Proxing; Swagger; OpenApi; TLS 1.2; XML; Local tunneling Yes Yes[15] No Yes
Camouflage Yes; MIT[16] Yes HTTP(S), HTTP/2 gRPC, Websockets, Thrift Yes[17] Yes[18] Yes[19] No
Castle Mock Yes; Apache 2[20] Yes HTTP(S) Yes Yes Yes No
Charles Proxy No; Proprietary[21] No HTTP(S) Yes No No No
Ekko Proxy No; Proprietary Yes (non commercial use)[22] HTTP(S), JDBC; WSDL, Swagger, OpenApi, JWT. Yes[23] Yes (Scriptable) Yes No
HAM Yes; MIT Yes HTTP(S), SOAP, MITM/Proxing, Swagger, XML, JSON, Jackson-Smile, Brotli, Record, Replay, Automatic tests, Schema verification, JDBC Yes (Web) Yes (Dynamic Javascript and Java Plugins) Yes No
Hoverfly Yes; Apache 2[24] Yes HTTP(S) Yes Yes Yes Yes [25]
HTTP Toolkit Yes; AGPL[26] Yes (Hobbyist Edition)[27] HTTP(S) Yes No No No
Int4 IFTT No; Proprietary No HTTP(S), Middleware virtualization: SAP Process Orchestration, SAP Intelligent Suite, Dell Boomi, Software AG Webmethods, SAP IDOCs Yes Yes No No
Karate Yes; MIT[28] Yes HTTP(S), Java interop[29] No Yes[29] No No
Mockadillo No; Proprietary No HTTP(S)[30] Yes Yes No Yes
Mocklets No; Proprietary[31] Yes HTTP(S) Yes No No Yes [32]
Mockoon Yes; MIT[33] Yes HTTP(S)[34] Yes Yes Yes [35] No
MockServer Yes; Apache 2[36] Yes HTTP(S) Yes[37] Yes Yes No
mock.qa No; Proprietary Yes (Free plan)[38] gRPC, gRPC-web, HTTP/1.x, HTTP/2[39] Yes[40] (Web) Yes[41][42] (Scripting language,[43] Request matching,[44] Response templating,[45] Data generation,[46] Stateful scenarios[47]) No Yes
Mountebank Yes; MIT[48] Yes HTTP(S), TCP, SMTP[49] No Yes[50] Yes[51] No
NetOcean No; Proprietary No Web Services Protocols: HTTP, HTTPS, HTTP2, REST, SOAP, Hessian

Others: IMAP, FTP, DNS, XML, JSON, WebSocket

ESB / Middleware Protocols, TIBCO JMS

Database Protocols: JDBC

Proprietary: TCP, UDP

Platforms: TIBCO-EMS, IBM-MQ, Kafka

SOA Protocols: SOAP, HTTP, XML, REST

SMS Gateway Providers: SMTP, POP3

Bill Payments Services: Gift card- PINPAD, AJB

Yes Yes Yes Yes
Parasoft Virtualize No; Proprietary Yes (Community Edition)[52] AMQP, FIX, FTP, HTTP(S), ISO 8583, JMS,
JDBC, MQ, MQTT, .NET WCF, RabbitMQ, SAP, TCP/IP, etc.[53]
Yes Yes Yes[54] Yes
Postman No; Proprietary Yes (Free Edition)[55] HTTP(S) Yes Yes (JSON Examples) No Yes
ProxyMan No; Proprietary Yes,[56] (Limited) HTTP(S), Websockets Yes Yes[57] No No
QuickMocker No; Proprietary Yes (Free Subscription)[58] HTTP(S) Yes Yes[59] No Yes
Rapidmock No; Proprietary[60] Yes (Free Edition) HTTP(S) Yes No No Yes
sMockin Yes; Apache 2[61] Yes HTTP, Websockets, Server Side Events, plus tools for real time monitoring & live response modification Yes Yes Yes No
Smocker Yes; MIT[62] Yes HTTP(S)[63] Yes Yes Yes No
SmartMock.io No; Proprietary[64] Yes [65] HTTP(S) Yes Yes No Yes
specmatic.in Yes; MIT[66] Yes HTTP(S), Swagger, OpenAPI, WSDL, Kafka (WIP) No Yes No No
simulado Yes; MIT[67] Yes HTTP(S) No Yes Yes Yes
SoapUI MockServer Yes; EUPL[68] Yes HTTP(S)[69] Yes[69] No[69] No[69] No[69]
Stoplight Yes; Prism[70] Yes (Free Edition)[71] HTTP(S) and generate mocks directly from OpenAPI Yes Yes Yes Yes
Traffic Parrot No; Proprietary[72] No;[73] HTTP(S) including REST and SOAP

gRPC

JMS (ActiveMQ TCP, ActiveMQ AMQP 1.0, Azure AMQP 1.0, RabbitMQ AMQP 0.9.1, IBM® WebSphere MQ 7.5+)

Native IBM® WebSphere MQ 7.5+

Thrift

AMQP 1.0

File transfers over a filesystem

Amazon Simple Queue Service (SQS)

Azure Service Bus AMQP 1.0 [74]

In beta:[75] FIX, FAST, FIXatdl, SWIFT, MQTT, SonicMQ, Kafka, CORBA, FTP, SFTP, .NET WCF, RMI, MTP, TIBCO EMS, CICS, SAP RFC, JDBC, Mongo, Databases, OFX, IFX, RIXML, AS2, Amazon Simple Notification Service (SNS), AWS IoT Message Broker, XMPP, Google Cloud Messaging (GCM), Azure Event Grid, Azure Event Hubs, STOMP, Avro, HTTP/2 (HTTP2), LWM2M, CoAP (Constrained Application Protocol), ZeroMQ, Broker-J (BrokerJ), Qpid, QUIC and gQUIC (Google QUIC)

Yes[72] Yes[76] Yes[72] Yes[77][72]
tweak No; Proprietary Yes HTTP(S) Yes No No No
Wilma Yes; GPL v3.0[78] Yes [79] HTTP(S) Yes Yes Yes [80] No
Wiremock Yes; Apache 2[81] Yes HTTP(S) No Yes Yes Yes [82]
WireMock.Net Yes; Apache 2[83] Yes HTTP(S) No Yes Yes [84][85] No
Wiresham Yes; Apache 2[86] Yes TCP No Yes No No

See also

References

  1. ^ a b Thought Works Technology Radar Mountebank
  2. ^ Tom Akehurst at the Next Gen Service Virtualisation Forum
  3. ^ Martin Fowler, Microservce Testing, Component Testing
  4. ^ API Simulator License Agreement
  5. ^ API Simulation Modeler
  6. ^ Scripting in API Simulator
  7. ^ Simula Template Scriptlets
  8. ^ API Simulator in Docker Container
  9. ^ apiUi License
  10. ^ The apiUi GUI
  11. ^ apiUi Scripting; adding dynamics
  12. ^ apiUi Docker
  13. ^ Beeceptor eases API development and testing by allowing mocking, intercepting and MITM proxies
  14. ^ Beeceptor pricing
  15. ^ Handlebar templates for scripting; adding dynamic responses
  16. ^ Camouflage License
  17. ^ Camouflage UI
  18. ^ Scripting in Camouflage
  19. ^ Camouflage Docker
  20. ^ Castle Mock License
  21. ^ Charles Proxy EULA
  22. ^ Ekko Proxy License Agreement
  23. ^ Ekko Proxy Usage
  24. ^ Hoverfly license
  25. ^ Hoverfly Cloud
  26. ^ HTTP Toolkit license
  27. ^ HTTP Toolkit tiers
  28. ^ Karate license
  29. ^ a b Karate-Netty home page
  30. ^ "Mockadillo". Mockadillo Homepage.
  31. ^ Mocklets Terms of Use
  32. ^ Mocklets
  33. ^ Mockoon license
  34. ^ "Mockoon". Mockoon features page.
  35. ^ Mockoon CLI dockerhub
  36. ^ MockServer License
  37. ^ MockServer Dashboard
  38. ^ Mock.qa: Free plan on GitHub Markeplace
  39. ^ Mock.qa: Supported protocols
  40. ^ Mock.qa: Playground
  41. ^ Mock.qa: Configuration
  42. ^ Mock.qa: Configuration examples
  43. ^ Mock.qa: Scripting language
  44. ^ Mock.qa: Request matching
  45. ^ Mock.qa: Response templating
  46. ^ Mock.qa: Data generation
  47. ^ Mock.qa: Stateful scenarios
  48. ^ Mountebank license
  49. ^ Moutebank home page
  50. ^ Mountebank injection
  51. ^ Running Mountebank in Docker
  52. ^ Parasoft Virtualize Community Edition
  53. ^ Parasoft Virtualize home page
  54. ^ Virtualize Docker Files 1.0
  55. ^ Postman Pricing
  56. ^ Proxyman Pricing
  57. ^ Proxyman scripting
  58. ^ QuickMocker Pricing
  59. ^ QuickMocker RegExp & Shortcodes
  60. ^ Rapidmock home page
  61. ^ "Matthewgallina/Smockin". GitHub. 27 March 2022.
  62. ^ Smocker License
  63. ^ Smocker documentation
  64. ^ SmartMock.io Terms of Use
  65. ^ SmartMock.io pricing
  66. ^ [1]
  67. ^ simulado license
  68. ^ SoapUI Licence
  69. ^ a b c d e SoapUI MockServer documentation
  70. ^ Prism
  71. ^ Stoplight Pricing
  72. ^ a b c d Traffic Parrot home page
  73. ^ Traffic Parrot pricing
  74. ^ Traffic Parrot data sheet
  75. ^ Traffic Parrot list of beta features
  76. ^ Traffic Parrot Dynamic Responses Documentation
  77. ^ Traffic Parrot is compatible with Docker, Kubernetes and Openshift
  78. ^ Wilma License
  79. ^ Wilma Feature list
  80. ^ Docker images of Wilma
  81. ^ Wiremock License
  82. ^ Mocklab
  83. ^ WireMock.Net License
  84. ^ WireMock.Net .Net Core 2.0 Linux image
  85. ^ WireMock.Net .Net Core 2.0 windows-nano image
  86. ^ Wiresham License