Comparison of API simulation tools

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

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 [9] Yes; GPL v3.0[10] Yes HTTP(S); STOMP, Wsdl; Swagger; OpenApi; Cobol Yes[11] Yes[12] Yes[13] No
Beeceptor [14] No; Proprietary[15] Yes (Free plan) HTTP1.1; HTTP2; HTTP(S); SOAP, MITM/Proxing; Swagger; OpenApi; TLS 1.2; XML; Local tunneling Yes Yes[16] No Yes
Camouflage Yes; MIT[17] Yes HTTP(S), HTTP/2 gRPC, Websockets, Thrift Yes[18] Yes[19] Yes[20] No
Castle Mock Yes; Apache 2[21] Yes HTTP(S) Yes Yes Yes No
Charles Proxy No; Proprietary[22] No HTTP(S) Yes No No No
Ekko Proxy No; Proprietary Yes (non commercial use)[23] HTTP(S), JDBC; WSDL, Swagger, OpenApi, JWT. Yes[24] 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 Yes (Web) Yes (Dynamic Javascript and Java Plugins) Yes No
Hoverfly Yes; Apache 2[25] Yes HTTP(S) Yes Yes Yes Yes [26]
HTTP Toolkit Yes; AGPL[27] Yes (Hobbyist Edition)[28] 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[29] Yes HTTP(S), Java interop[30] No Yes[30] No No
Mockadillo No; Proprietary No HTTP(S)[31] Yes Yes No Yes
Mocklets No; Proprietary[32] Yes HTTP(S) Yes No No Yes [33]
Mockoon Yes; MIT[34] Yes HTTP(S)[35] Yes Yes Yes [36] No
MockServer Yes; Apache 2[37] Yes HTTP(S) Yes[38] Yes Yes No
Mountebank Yes; MIT[39] Yes HTTP(S), TCP, SMTP[40] No Yes[41] Yes[42] No No; Proprietary Yes (Free plan)[43] gRPC, gRPC-web Yes Yes[44][45] No Yes
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


SMS Gateway Providers: SMTP, POP3

Bill Payments Services: Gift card- PINPAD, AJB

Yes Yes Yes Yes
Parasoft Virtualize No; Proprietary Yes (Community Edition)[46] AMQP, FIX, FTP, HTTP(S), ISO 8583, JMS,
JDBC, MQ, MQTT, .NET WCF, RabbitMQ, SAP, TCP/IP, etc.[47]
Yes Yes Yes[48] Yes
Postman No; Proprietary Yes (Free Edition)[49] HTTP(S) Yes Yes (JSON Examples) No Yes
ProxyMan No; Proprietary Yes,[50] (Limited) HTTP(S), Websockets Yes Yes[51] No No
QuickMocker No; Proprietary Yes (Free Subscription)[52] HTTP(S) Yes Yes[53] No Yes
Rapidmock No; Proprietary[54] Yes (Free Edition) HTTP(S) Yes No No Yes
sMockin Yes; Apache 2[55] Yes HTTP, Websockets, Server Side Events, plus tools for real time monitoring & live response modification Yes Yes Yes No
Smocker Yes; MIT[56] Yes HTTP(S)[57] Yes Yes Yes No No; Proprietary[58] Yes [59] HTTP(S) Yes Yes No Yes
simulado Yes; MIT[60] Yes HTTP(S) No Yes Yes Yes
SoapUI MockServer Yes; EUPL[61] Yes HTTP(S)[62] Yes[62] No[62] No[62] No[62]
Stoplight Yes; Prism[63] Yes (Free Edition)[64] HTTP(S) and generate mocks directly from OpenAPI Yes Yes Yes Yes
Traffic Parrot No; Proprietary[65] No;[66] HTTP(S) including REST and SOAP


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+


AMQP 1.0

File transfers over a filesystem

Amazon Simple Queue Service (SQS)

Azure Service Bus AMQP 1.0 [67]

In beta:[68] 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[65] Yes[69] Yes[65] Yes[70][65]
tweak No; Proprietary Yes HTTP(S) Yes No No No
Wilma Yes; GPL v3.0[71] Yes [72] HTTP(S) Yes Yes Yes [73] No
Wiremock Yes; Apache 2[74] Yes HTTP(S) No Yes Yes Yes [75]
WireMock.Net Yes; Apache 2[76] Yes HTTP(S) No Yes Yes [77][78] No
Wiresham Yes; Apache 2[79] Yes TCP No Yes No No

See also[edit]


  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 how to mock api calls? how to test api calls?
  10. ^ apiUi License
  11. ^ The apiUi GUI
  12. ^ apiUi Scripting; adding dynamics
  13. ^ apiUi Docker
  14. ^ Beeceptor eases API development and testing by allowing mocking, intercepting and MITM proxies
  15. ^ Beeceptor pricing
  16. ^ Handlebar templates for scripting; adding dynamic responses
  17. ^ Camouflage License
  18. ^ Camouflage UI
  19. ^ Scripting in Camouflage
  20. ^ Camouflage Docker
  21. ^ Castle Mock License
  22. ^ Charles Proxy EULA
  23. ^ Ekko Proxy License Agreement
  24. ^ Ekko Proxy Usage
  25. ^ Hoverfly license
  26. ^ Hoverfly Cloud
  27. ^ HTTP Toolkit license
  28. ^ HTTP Toolkit tiers
  29. ^ Karate license
  30. ^ a b Karate-Netty home page
  31. ^ "Mockadillo". Mockadillo Homepage.
  32. ^ Mocklets Terms of Use
  33. ^ Mocklets
  34. ^ Mockoon license
  35. ^ "Mockoon". Mockoon features page.
  36. ^ Mockoon CLI dockerhub
  37. ^ MockServer License
  38. ^ MockServer Dashboard
  39. ^ Mountebank license
  40. ^ Moutebank home page
  41. ^ Mountebank injection
  42. ^ Running Mountebank in Docker
  43. ^ Free plan on GitHub Markeplace
  44. ^ Configure
  45. ^ Configuration examples
  46. ^ Parasoft Virtualize Community Edition
  47. ^ Parasoft Virtualize home page
  48. ^ Virtualize Docker Files 1.0
  49. ^ Postman Pricing
  50. ^ Proxyman Pricing
  51. ^ Proxyman scripting
  52. ^ QuickMocker Pricing
  53. ^ QuickMocker RegExp & Shortcodes
  54. ^ Rapidmock home page
  55. ^ "Matthewgallina/Smockin". GitHub. 27 March 2022.
  56. ^ Smocker License
  57. ^ Smocker documentation
  58. ^ Terms of Use
  59. ^ pricing
  60. ^ simulado license
  61. ^ SoapUI Licence
  62. ^ a b c d e SoapUI MockServer documentation
  63. ^ Prism
  64. ^ Stoplight Pricing
  65. ^ a b c d Traffic Parrot home page
  66. ^ Traffic Parrot pricing
  67. ^ Traffic Parrot data sheet
  68. ^ Traffic Parrot list of beta features
  69. ^ Traffic Parrot Dynamic Responses Documentation
  70. ^ Traffic Parrot is compatible with Docker, Kubernetes and Openshift
  71. ^ Wilma License
  72. ^ Wilma Feature list
  73. ^ Docker images of Wilma
  74. ^ Wiremock License
  75. ^ Mocklab
  76. ^ WireMock.Net License
  77. ^ WireMock.Net .Net Core 2.0 Linux image
  78. ^ WireMock.Net .Net Core 2.0 windows-nano image
  79. ^ Wiresham License