EvoMaster
By WebFuzzing (open source). Category: API testing with AI. Homepage
The EvoMaster README describes it as an open-source tool that generates system-level test suites for REST, GraphQL and RPC APIs. It uses an evolutionary algorithm and dynamic program analysis and does not require paid external LLM APIs. Generated tests are written as JUnit tests in Java or Kotlin, or as Python and JavaScript test suites. EvoMaster runs locally via pip, Docker or a JAR, with no telemetry, and in white-box mode can insert data into SQL and MongoDB databases. A GitHub Action is available. It is LGPL-3.0 licensed and free.
Description written from the vendor's documentation.
Status
Status: Active
Facts
| Fact | Value | Evidence | Source | Verified on |
|---|---|---|---|---|
| Status | Active | Documented | github.com | |
| Founded | 2016 | Documented | github.com | |
| Headquarters | Not documented | Not documented | None found | |
| AI capabilities | Documented | github.com | ||
| Test creation | Documented | github.com | ||
| Test output | Not documented | Not documented | None found | |
| Surfaces | Documented | github.com | ||
| Hosting | Documented | github.com | ||
| Pricing model | Documented | github.com | ||
| Free tier | Yes | Documented | github.com | |
| CI integrations | Documented | github.com | ||
| Self-healing | None documented | Not documented | None found | |
| Agent integration | Not documented | Not documented | None found | |
| Open source | Yes, licence LGPL-3.0 | Documented | github.com |
Published prices
No prices are published.
Vendor-stated, verbatim
What WebFuzzing (open source) says about its product, quoted as published and not confirmed in documentation.
“EvoMaster (www.evomaster.org) is the first (2016) open-source AI-driven tool that automatically generates system-level test cases for web/enterprise applications.”
“More than 30 different kinds of faults can be automatically found, from HTTP semantics checks to security vulnerabilities such as BOLA and SQLi.”
“State-of-the-art: an independent study (2022), comparing 10 fuzzers on 20 RESTful APIs, shows that EvoMaster gives the best results. Another independent study (2024) done by a different research group confirms these results.”
Alternatives
Tools in the same category (API testing with AI), ordered by the number of shared creation and surface values, then by name. Each line lists documented facts that differ from EvoMaster.
- Keploy: documents output Proprietary runner; creation by recording; hosting cloud
- KushoAI: documents output Mixed; creation by recording, natural language, prompt to test; hosting cloud, hybrid
- Qodex: documents output Standard Playwright; creation by natural language, prompt to test; hosting cloud
- Skyramp: documents output Mixed; creation by recording, natural language
- StackHawk: documents output Proprietary runner; creation by autonomous from URL; hosting cloud; no free tier
- AITestMind: documents output Proprietary runner; creation by natural language, recording
Questions
Is this page a review of EvoMaster?
No. This page is a fact sheet. Each fact shows its evidence level, its source and the date it was checked. We do not rate or rank tools.
Does EvoMaster have a free tier?
Yes. EvoMaster has a free tier. This is documented, checked on 2026-09-24.
What test output does EvoMaster produce?
The test output format is not documented as of 2026-09-24.
Is EvoMaster still available?
Status: Active, checked on 2026-09-24.
Sources
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