LocalStack simulates cloud environments on customer infrastructure so developers and AI agents can validate cloud applications before deployment.
Alternatives to OpenText Service Virtualization
Beeceptor is a developer-focused API simulation platform for creating mocks, virtualizing services, testing contracts, and simulating failures.
- 4

Microcks
Microcks is a free, open-source tool for mocking and testing APIs and microservices.
Free planWebAPIExtensionLinux7.2Free plan - 5

Hoverfly
Hoverfly Cloud is a hosted API simulation and mocking service for development and testing that should not rely on live API dependencies.
WebAPILinuxmacOS6.7From $10 a month - 6

MockServer
MockServer is free, self-hosted software for mocking and proxying HTTP, HTTPS, and gRPC services in isolated, deterministic testing.
Free planWebAPILinuxmacOS6.6Free plan - 7

Automic Continuous Delivery Automation
Automic Continuous Delivery Automation orchestrates application releases and deployments, with real-time monitoring and release reporting.
WebAPILinuxSelf-hosted6.5 - 8

BlazeMeter
BlazeMeter is an enterprise continuous testing platform for performance, functional, and API testing.
WebAPIExtensionLinux6.5From $99 a year - 9

WireMock
WireMock simulates APIs and software dependencies, letting teams test without relying on those services, explore edge cases, and develop dependent features in parallel.
Free planWebAPILinuxSelf-hosted6.4Free plan - 10

Amazon Aurora
Amazon Aurora is a fully managed relational database service offering PostgreSQL, MySQL, and DSQL engines.
Free planAPI6.3Free plan - 11
Wilma
Wilma is a self-hosted tool for developing and testing applications that rely on other services.
Free planWebSelf-hosted6.3Free plan - 12
Azurite
Azurite is a free, open-source server emulator for trying Azure Storage APIs in a local environment.
Free planExtensionLinuxmacOSSelf-hosted6.2Free plan - 13
DynamoDB Local
DynamoDB Local lets developers build and test applications without connecting to the DynamoDB web service.
Free planAPILinuxmacOSSelf-hosted6.1Free plan - 14

Traffic Parrot
Traffic Parrot simulates APIs, services, and systems so teams can test applications and microservices in isolation.
WebAPILinuxmacOS6.0 - 15
mountebank
mountebank is a free, self-hosted tool for developers who need applications to work against test doubles rather than real dependencies.
Free planAPILinuxSelf-hosted5.8Free plan - 16

Cavisson NetOcean
Cavisson NetOcean simulates backend applications and third-party systems so development and testing teams can test without relying on those systems.
WebAPISelf-hosted5.6 - 17
Servirtium
Servirtium records HTTP interactions during tests and replays them from saved files, allowing playback without calling the real service.
APILinuxmacOSSelf-hosted5.5 - 18

Azure Cosmos DB Emulator
Free planLinuxWindows5.4Free plan - 19
Parasoft Virtualize
WebLinuxmacOSWindows5.3 - 205.1


