Tech riderRev. 30 Sept 2026

Wilma

Ch 117.0of 20 Service Virtualization Software

1Runs onself-hosted, Web
2CostsFree plan
3Deployment modelself hosted
4Stateful simulationYes
5Fault injectionYes
6Database virtualizationNo
7Messaging virtualizationNo
8Record and replayYes

8 lines stated Written from the maker's own pages: epam.github.io, github.com

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Overview

Wilma is ranked #11 of 20 in service virtualization software on Specifiction. It runs on Self-hosted, Web. There is a free plan.

Wilma plans and pricing

All plans

Wilma Free GPLv3.0 licensed software github.com · 30 Sept 2026

Compared on service virtualization software

Free plan: Yesepam.github.io
Deployment model: self_hostedepam.github.io
Stateful simulation: Yesepam.github.io
Fault injection: Yesepam.github.io
Database virtualization: Noepam.github.io
Messaging virtualization: Noepam.github.io
Record and replay: Yesepam.github.io

Facts

Purpose: Wilma combines a service stub with an HTTP/HTTPS transparent proxy for developing and testing applications that depend on other services.epam.github.io · 30 Sept 2026
Traffic handling: It can capture, decode, save, and forward HTTP/HTTPS traffic, including two-way SSL, or generate stub responses for requests.epam.github.io · 30 Sept 2026
Operating modes: Wilma can run as a proxy, a service stub, or in a mixed mode.epam.github.io · 30 Sept 2026
Stub configuration: Stub behavior is configured with JSON files, and multiple stub configurations can be used.epam.github.io · 30 Sept 2026
Message modification: Message interceptors can alter or analyze requests and responses in real time, and users can add their own interceptor classes.epam.github.io · 30 Sept 2026
Message search: Wilma Message Search provides search for request-response pairs logged by Wilma.epam.github.io · 30 Sept 2026
Integrations: Wilma provides a Java service library through Maven Central and a .NET service library through NuGet.epam.github.io · 30 Sept 2026
Distribution: The applications are available as Docker Hub images, GitHub release ZIP files, or builds created from source.epam.github.io · 30 Sept 2026
Runtime requirement: The Wilma application requires JRE 11, and Wilma Message Search requires JDK 11.epam.github.io · 30 Sept 2026
Use cases: The site describes use in development and test environments, including unit, integration, functional, and end-to-end testing, as well as manual testing.epam.github.io · 30 Sept 2026
Load behavior: When load rises, Wilma can disable message decoding and then disk logging, and it restores those operations as load returns to normal.epam.github.io · 30 Sept 2026
Log retention: Wilma has a scheduled process that deletes old message logs according to configurable settings.epam.github.io · 30 Sept 2026
Test scenarios: The maker describes use in unit, integration, functional, end-to-end, and performance testing, as well as manual tests.github.com · 30 Sept 2026
Runtime configuration: Wilma's stub behavior is configured using JSON files, which can be uploaded or changed through its UI or service while it is running.epam.github.io · 30 Sept 2026
Extensibility: Users can add custom condition checkers, response formatters, and message interceptors, including by uploading classes or JAR files.epam.github.io · 30 Sept 2026
Deployment: The maker offers Docker images, prepared GitHub release ZIP files, or building a release from source.epam.github.io · 30 Sept 2026
Security and protocols: The introduction says Wilma supports HTTP/HTTPS transparent proxying, including two-way SSL; the repository notes TLS 1.1, 1.2, and 1.3 support for version 2.0, with possible extra configuration.epam.github.io · 30 Sept 2026
Logging controls: Message logging can be switched on or off from the Wilma UI, and the UI provides access to message log files.epam.github.io · 30 Sept 2026
Load safeguards: Under heavy load, Wilma can disable message decoding and then disk logging, and restore those operations when load returns to normal.epam.github.io · 30 Sept 2026
Support: The project invites users to submit issues, patches, suggestions, and feedback, and says enterprise support requests can be sent to its contact email.epam.github.io · 30 Sept 2026
License: The repository states Wilma is free software under the GNU General Public License version 3 or later, with no warranty.github.com · 30 Sept 2026