Realyst

Realyst is a browser extension built for people who evaluate single-family homes and want the numbers without leaving the listing page. Once installed, it adds its own analysis layer on top of Zillow.com, so a normal property page also shows a running model of what that home would look like as a rental: rent assumptions, mortgage terms, vacancy allowance, renovation estimates and the resulting return metrics. The pitch is speed — investors and realtors can screen listings far faster than rebuilding a spreadsheet for every address.

The extension leans on a configurable financial model rather than a single canned output. You adjust inputs such as expected rental rate, mortgage rate, vacancy rate and renovation budget, and the cash-on-cash return and ROI figures update to match your assumptions. A neighbourhood comparison view can line up the profitability of up to 80 nearby properties at once, which makes it easier to spot the outliers in a subdivision before scheduling showings. Results can be saved and exported to CSV or PDF for later review or sharing with a partner or client.

Realyst also layers in AI assistance: five GPT-4 powered prompts cover things like renovation estimates and neighbourhood market trends, and homeowners and buyers get a plain-language PDF summary with nearby comparables plus property, neighbourhood and demographic context. A two-day free trial is offered through in-app purchase, and the extension is distributed on the Chrome Web Store.