JUnit vs MockK

JUnit

6.0 #3 in Unit Testing Frameworks

About JUnit

MockK

5.0 #29 in Unit Testing Frameworks

About MockK
JUnitMockK
Free planYesNo
Free trialNoNo
Paid fromFree—
Open sourceNoNo
Platformsself-hostedAndroid
Free planYes—
Supported languagesJava, Kotlin, GroovyKotlin
Parameterized casesYes—
Parallel executionYesYes
Built-in mocks—Yes

Both are listed in Best Unit Testing Frameworks. On Inferse, JUnit scores higher on our published basis.