Test Data Management is described as 'Automate the provisioning of masked and synthetically generated data to meet the needs of test, development, and QA teams'. There are four alternatives to Test Data Management for Windows, Online / Web-based and SaaS. The best alternative is TestComplete. It's not free, so if you're looking for a free alternative, you could try Highly Composite. Other great apps like Test Data Management are Ranorex Studio (Paid) and Q-up Studio (Paid).
Accelerate testing with Ranorex Studio, your all-in-one tool for test automation. Perform end-to-end testing on desktop, web and mobile platforms using real devices or emulators/simulators. Automate even challenging interfaces such as ERP and legacy applications.