Mashvisor collects data from a wide variety of sources including public records, third-party data providers, and MLS listings. Of course, no estimates can be 100% accurate, but Mashvisor’s estimates are generally regarded as highly accurate.
The final estimates are actually created by algorithms that utilize machine learning to generate rental income estimates for individual properties. This means that they aren’t as prone to errors or inconsistencies as human-created estimates would be.
Furthermore, the platform is constantly updating the data used to create the estimates, which means you can reasonably assume that the estimate(s) you’ve been given is using the latest data available.