RestTestGen

Linux · Self-hosted

Freedom report

One barScore 5.1

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedThinly documented

RestTestGen is ranked #27 of 35 in API testing tools on Freedom251. It runs on Linux, Self-hosted. There is a free plan.

RestTestGen plans and pricing

All plans

RestTestGen Free Apache-2.0 licensed open-source framework github.com · 5 Oct 2026

Compared on API testing tools

Free plan: Yes

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The record

Purpose: RestTestGen is a framework and tool for automated black-box end-to-end testing of RESTful web APIs over HTTP.
API requirement: Testing an API requires its OpenAPI specification and a deployed instance reachable over HTTP.
Strategies: Included strategies cover nominal and error testing, mass assignment security testing, natural-language enhancement of OpenAPI specifications, and DeepREST reinforcement learning.
OpenAPI support: The framework parses OpenAPI v3 specifications in JSON and YAML formats.
Test generation: It supports parameter value generation and retrieval, mutation operators, response processors, and configurable operation sorting.
Analysis and output: It provides status-code and security oracles, coverage measurements, reports, and replayable JUnit plus REST-assured test cases.
Integration: The NLP-based specification enhancement strategy requires a separately deployed NLP2REST Rule Extraction service.
Authentication: Authenticated API testing uses user-provided commands that return authentication parameters as JSON, and only one command is used at a time.
Deployment: The project can be built and run with Docker, Gradle, or IntelliJ IDEA; DeepREST has a dedicated Dockerfile.
System requirements: The maintainers recommend Ubuntu and report testing the current version on Ubuntu 22.04 LTS; running with Gradle requires Java 11.
Docker limitation: The RestTestGen Docker container includes Java 11 and Gradle 8.14 but does not include Python, which may be needed by user authentication scripts.
Security and license: The repository is licensed under Apache License 2.0; its included mass assignment strategy tests for that vulnerability class.
Audience and support: The maintainers describe the framework as intended for researchers, practitioners, and developers, and invite contributions through pull requests.
Founded: 2022
Price from: Free

Where it ranks on Freedom251

Best API Testing Tools in 2026#27 of 35

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Sources

github.com/SeUniVr/RestTestGen· checked 5 Oct 2026
github.com/SeUniVr/RestTestGen/blob/main/REQUIREME· checked 5 Oct 2026