Cavisson NetOcean vs MockServer

Cavisson NetOcean simulates backend applications and third-party systems so development and testing teams can work without those dependencies. It captures production-like behavior and performance characteristics, then supports custom responses, boundaries, and error conditions. Supported protocols include HTTP, HTTPS, HTTP/2, REST, SOAP, Hessian, IMAP, FTP, DNS, XML, JSON, WebSocket, JDBC, TCP, and UDP. Messaging technologies include TIBCO JMS, TIBCO-EMS, IBM MQ, and Kafka. REST APIs and command-line interfaces connect NetOcean with CI/CD workflows. A web portal and thick client create, deploy, and manage virtual services. Service definitions support version control and rollback. The product is designed as an appliance and can also run as a virtual machine, with self-hosted, web, and API access. Cavisson states that one appliance can handle 100–1000 times more load than legacy solutions. Pricing is on request, and a free trial is listed. Support includes 24×7 application health monitoring and testing assistance.

MockServer is a free, self-hosted tool for mocking and proxying HTTP, HTTPS, and gRPC services during isolated testing. It can verify requests as well as stand in for services. Teams can generate mocks and validate traffic against OpenAPI or Swagger contracts, or import recorded sessions from browser HAR files and Postman collections. Beyond HTTP services, it can mock gRPC, AsyncAPI brokers such as Kafka, MQTT, and AMQP, and OAuth2/OIDC providers. Its protocol coverage includes HTTP/1.1, HTTP/2, HTTPS, SOCKS, and experimental HTTP/3, which uses a separate UDP port. For fault-oriented testing, it can add latency, errors, dropped connections, and malformed responses to mocked or proxied traffic. Deployment options include Docker, an executable JAR, Helm/Kubernetes, Testcontainers, Homebrew, and a JVM-less bundle. A web dashboard displays logs, expectations, and recorded traffic; Prometheus metrics and OpenTelemetry tracing are available for shared environments. Each instance includes an MCP server at /mockserver/mcp. The /mockserver/status and /mockserver/ready probes remain reachable without authentication or authorization.