Free plans have same features as our paid plans. The only limitation in free plans is you can have maximum of 200 test cases and 400 executed test cases.
What is an executed test case?
Each test case is considered executed when it is marked Pass/Fail/Skip by a tester. So if you have 50 test cases in your project, you can run each of them 8 times.
As this will mean Test Collab will have 50 x 8 = 400 executed test cases records.