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The tools listed here support emulatingcite-ref-technologyradarmoutebank-1-0[1] or simulating APIs and software systems. They are also calledcite-ref-2[2] API mocking tools, service virtualization tools, over the wire test doubles and tools for stubbing and mocking HTTP(S) and other protocols.cite-ref-technologyradarmoutebank-1-1[1] They enable component testing in isolation.cite-ref-3[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 ] | Yes | Yes |

| Camouflage | Yes; MIT [ 17 ] | Yes | HTTP(S), HTTP/2 gRPC, Websockets, Thrift | Yes [ 18 ] | Yes [ 19 ] | Yes [ 20 ] | 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, MongoDb | 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 |

| LogDog | No; Proprietary [ 30 ] | No | HTTP(S), HTML, XML, JSON, Replay, Real-Time-Monitoring, 1-Click-Mocks | Yes | Yes | No | Yes |

| Microcks | Yes; Apache 2 [ 31 ] | Yes | HTTP(S), SOAP, gRPC, GraphQL, AsyncAPI [ 32 ] | Yes | Yes | Yes | No |

| Mockadillo | No; Proprietary | No | HTTP(S) [ 33 ] | Yes | Yes | No | Yes |

| Mocklets | No; Proprietary [ 34 ] | Yes | HTTP(S) | Yes | No | No | Yes [ 35 ] |

| Mockoon | Yes; MIT [ 36 ] | Yes | HTTP(S) [ 37 ] | Yes | Yes | Yes [ 38 ] | No |

| MockServer | Yes; Apache 2 [ 39 ] | Yes | HTTP(S) | Yes [ 40 ] | Yes | Yes | No |

| mock.qa | No; Proprietary | Yes (Free plan) [ 41 ] | gRPC, gRPC-web, HTTP/1.x, HTTP/2 [ 42 ] | Yes [ 43 ] (Web) | Yes [ 44 ] [ 45 ] (Scripting language, [ 46 ] Request matching, [ 47 ] Response templating, [ 48 ] Data generation, [ 49 ] Stateful scenarios [ 50 ] ) | No | Yes |

| Mountebank | Yes; MIT [ 51 ] | Yes | HTTP(S), TCP, SMTP [ 52 ] | No | Yes [ 53 ] | Yes [ 54 ] | 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) [ 55 ] | AMQP, FIX, FTP, HTTP(S), ISO 8583, JMS, JDBC, MQ, MQTT, .NET WCF, RabbitMQ, SAP, TCP/IP, etc. [ 56 ] | Yes | Yes | Yes [ 57 ] | Yes |

| Postman | No; Proprietary | Yes (Free Edition) [ 58 ] | HTTP(S) | Yes | Yes (JSON Examples) | No | Yes |

| ProxyMan | No; Proprietary | Yes, [ 59 ] (Limited) | HTTP(S), Websockets | Yes | Yes [ 60 ] | No | No |

| QuickMocker | No; Proprietary | Yes (Free Subscription) [ 61 ] | HTTP(S) | Yes | Yes [ 62 ] | No | Yes |

| Rapidmock | No; Proprietary [ 63 ] | Yes (Free Edition) | HTTP(S) | Yes | No | No | Yes |

| Requestly | Yes; GPL v3.0 [ 64 ] | Yes [ 65 ] | HTTP(S) | Yes | Yes | No | Yes [ 66 ] |

| sMockin | Yes; Apache 2 [ 67 ] | Yes | HTTP, Websockets, Server Side Events, plus tools for real time monitoring & live response modification | Yes | Yes | Yes | No |

| Smocker | Yes; MIT [ 68 ] | Yes | HTTP(S) [ 69 ] | Yes | Yes | Yes | No |

| SmartMock.io | No; Proprietary [ 70 ] | Yes [ 71 ] | HTTP(S) | Yes | Yes | No | Yes |

| Specmatic | Yes; MIT [ 72 ] | Yes (Basic Plan) [ 73 ] | HTTP(S), Swagger, OpenAPI, WSDL, Kafka, AsyncAPI, GraphQL, gRPC, Arazzo, Protobuf, JDBC, Redis, JMS, Google Pub/Sub [ 74 ] | Yes [ 75 ] | Yes | Yes | Yes |

| simulado | Yes; MIT [ 76 ] | Yes | HTTP(S) | No | Yes | Yes | Yes |

| SoapUI MockServer | Yes; EUPL [ 77 ] | Yes | HTTP(S) [ 78 ] | Yes [ 78 ] | No [ 78 ] | No [ 78 ] | No [ 78 ] |

| Speedscale | No; Proprietary | Yes, (Free Trial) [ 79 ] | HTTP(S), gRPC, GraphQL webservices, Message queues, OSS Databases [ 80 ] | Yes | No, Not required. Traffic recording-based [ 81 ] | Yes | Yes |

| Stoplight | Yes; Apache 2 [ 82 ] | Yes (Free Edition) [ 83 ] | HTTP(S) and generate mocks directly from OpenAPI | Yes | Yes | Yes | Yes |

| TPM-Proxy | Yes; MIT | Yes | Direct Wire Protocol implementation: HTTP(S), SOAP, MITM/Proxing, OpenAPI, XML, JSON, Jackson-Smile, Brotli, MongoDb, Postgres, MySQL, AMQP 091, MQTT, REDIS, Record, Replay, Modify | Yes | Yes (Java Plugins) | Yes | No |

| Traffic Parrot | No; Proprietary [ 84 ] | No; [ 85 ] | 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 [ 86 ] In beta: [ 87 ] 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 [ 84 ] | Yes [ 88 ] | Yes [ 84 ] | Yes [ 89 ] [ 84 ] |

| tweak | No; Proprietary | Yes | HTTP(S) | Yes | No | No | No |

| Tricentis API Simulation | No; Proprietary | Yes(Free Edition) [ 90 ] | Http(s), AmazonSqs, AMQP, AzureServiceBus, Files, IbmMQ, Kafka, RabbitMQ, Solace | Yes [ 90 ] | Yes [ 90 ] | Yes [ 91 ] | Yes [ 90 ] |

| Wilma | Yes; GPL v3.0 [ 92 ] | Yes [ 93 ] | HTTP(S) | Yes | Yes | Yes [ 94 ] | No |

| WireMock | Yes; Apache 2 [ 95 ] | Yes | HTTP(S), gRPC, GraphQL | Yes | Yes | Yes | Yes [ 96 ] |

| WireMock.Net | Yes; Apache 2 [ 97 ] | Yes | HTTP(S) | No | Yes | Yes [ 98 ] [ 99 ] | No |

| Wiresham | Yes; Apache 2 [ 100 ] | Yes | TCP | No | Yes | No | No |

• See also

• References

• Test double

• Service virtualization

cite-note-technologyradarmoutebank-11. ↑ Thought Works Technology Radar Mountebank

cite-note-22. ↑ Tom Akehurst at the Next Gen Service Virtualisation Forum

cite-note-33. ↑ Martin Fowler, Microservce Testing, Component Testing

cite-note-41. API Simulator License Agreement

cite-note-52. API Simulation Modeler

cite-note-63. Scripting in API Simulator

cite-note-74. Simula Template Scriptlets

cite-note-85. API Simulator in Docker Container

cite-note-96. apiUi how to mock api calls? how to test api calls?

cite-note-107. apiUi License

cite-note-118. The apiUi GUI

cite-note-129. apiUi Scripting; adding dynamics

cite-note-1310. apiUi Docker

cite-note-1411. Beeceptor eases API development and testing by allowing mocking, intercepting and MITM proxies

cite-note-1512. Beeceptor pricing

cite-note-1613. Handlebar templates for scripting; adding dynamic responses

cite-note-1714. Camouflage License

cite-note-1815. Camouflage UI

cite-note-1916. Scripting in Camouflage

cite-note-2017. Camouflage Docker

cite-note-2118. Charles Proxy EULA

cite-note-2219. Ekko Proxy License Agreement

cite-note-2320. Ekko Proxy Usage

cite-note-2421. Hoverfly license

cite-note-2522. Hoverfly Cloud

cite-note-2623. HTTP Toolkit license

cite-note-2724. HTTP Toolkit tiers

cite-note-2825. Karate license

cite-note-karate-netty-home-page-2926. Karate-Netty home page

cite-note-3027. LogDog

cite-note-3128. Microcks License

cite-note-3229. Using Microcks

cite-note-0-3330. "Mockadillo". Mockadillo Homepage.

cite-note-3431. Mocklets Terms of Use

cite-note-3532. Mocklets

cite-note-3633. Mockoon license

cite-note-3734. "Mockoon". Mockoon features page.

cite-note-3835. Mockoon CLI dockerhub

cite-note-3936. MockServer License

cite-note-4037. MockServer Dashboard

cite-note-4138. Mock.qa: Free plan on GitHub Markeplace

cite-note-4239. Mock.qa: Supported protocols

cite-note-4340. Mock.qa: Playground

cite-note-4441. Mock.qa: Configuration

cite-note-4542. Mock.qa: Configuration examples

cite-note-4643. Mock.qa: Scripting language

cite-note-4744. Mock.qa: Request matching

cite-note-4845. Mock.qa: Response templating

cite-note-4946. Mock.qa: Data generation

cite-note-5047. Mock.qa: Stateful scenarios

cite-note-5148. Mountebank license

cite-note-5249. Moutebank home page

cite-note-5350. Mountebank injection

cite-note-5451. Running Mountebank in Docker

cite-note-5552. Parasoft Virtualize Community Edition

cite-note-5653. Parasoft Virtualize home page

cite-note-5754. Virtualize Docker Files 1.0

cite-note-5855. Postman Pricing

cite-note-5956. Proxyman Pricing

cite-note-6057. Proxyman scripting

cite-note-6158. QuickMocker Pricing

cite-note-6259. QuickMocker RegExp & Shortcodes

cite-note-rapidmockhomepage-6360. Rapidmock home page

cite-note-6461. "requestly/requestly". GitHub.

cite-note-6562. Requestly Pricing

cite-note-6663. Requestly Clound Based Mock Server

cite-note-6764. "Matthewgallina/Smockin". GitHub. 27 March 2022.

cite-note-6865. Smocker License

cite-note-smockerdocumentation-6966. Smocker documentation

cite-note-7067. SmartMock.io Terms of Use

cite-note-7168. SmartMock.io pricing

cite-note-7269. "Specmatic". GitHub.

cite-note-7370. [1]

cite-note-7471. [2]

cite-note-7572. Specmatic Studio

cite-note-7673. simulado license

cite-note-7774. SoapUI Licence

cite-note-sopauidocumentation-7875. SoapUI MockServer documentation

cite-note-7976. "Speedscale Free Trial Version". Speedscale. Retrieved 2024-03-20.

cite-note-8077. "Technology Support | Speedscale Docs". docs.speedscale.com. Retrieved 2024-03-20.

cite-note-8178. "How Traffic Recording Works". Speedscale. Retrieved 2024-03-20.

cite-note-8279. Prism Licence

cite-note-8380. Stoplight Pricing

cite-note-trafficparrothomepage-8481. Traffic Parrot home page

cite-note-8582. Traffic Parrot pricing

cite-note-8683. Traffic Parrot data sheet

cite-note-8784. Traffic Parrot list of beta features

cite-note-8885. Traffic Parrot Dynamic Responses Documentation

cite-note-8986. Traffic Parrot is compatible with Docker, Kubernetes and Openshift

cite-note-ttaapisimlink-9087. https://www.tricentis.com/products/tricentis-test-automation

cite-note-9188. https://documentation.tricentis.com/tricentis_cloud/en/content/topics/sim_get_started.htm

cite-note-9289. Wilma License

cite-note-9390. Wilma Feature list

cite-note-9491. Docker images of Wilma

cite-note-9592. WireMock License

cite-note-9693. WireMock Cloud

cite-note-9794. WireMock.Net License

cite-note-9895. WireMock.Net .Net Core 2.0 Linux image

cite-note-9996. WireMock.Net .Net Core 2.0 windows-nano image

cite-note-10097. Wiresham License