Zillow Deal Analyzer vs Mortar
Zillow Deal Analyzer is a Chrome extension that, per its Chrome Web Store listing, evaluates a Zillow listing with one click and shows key investment metrics with no signup. If you want the simplest possible one-click read, that simplicity is genuinely appealing.
Mortar plays in the same category (metrics on the listing you are viewing) with a different set of opinions: every formula is deterministic and shown line by line, property tax and insurance come from a real per-state table rather than one flat assumption, the rent and financing assumptions are editable, and the analysis ends in an explicit verdict you can score against your own buy box. Both are free to try, so the honest advice is to run each on a listing you know well and see which numbers you trust.
Side by side
| Mortar | Zillow Deal Analyzer | |
|---|---|---|
| Where you analyze | In a popup on the Zillow listing you already have open | On the Zillow listing via its extension popup |
| Math transparency | Deterministic formulas, shown line by line | Shows metrics; formula detail per its listing is limited |
| Local taxes & insurance | Real per-state property tax + insurance applied automatically | Not advertised as state-localized on its listing |
| Editable inputs | Rent, down payment, rate and term all editable | Varies; see its listing for current features |
| Beyond the screen | Verdict, buy-box scoring, saved history (Pro) | Focused on the one-click metric view |
| Free usage | 5 free analyses a month, no credit card | Free per its store listing |
Comparison checked July 2026, based on public information. We are not affiliated with Zillow Deal Analyzer, and features change; verify against their site.
What Zillow Deal Analyzer does well
- One-click simplicity, per its store listing
- No signup to get started
- Lightweight approach for a quick first look
Pricing compared
Zillow Deal Analyzer is listed as free on the Chrome Web Store as of July 2026. Mortar is free for 5 analyses a month; Pro is $29 a month for unlimited analyses, buy-box scoring and deal history.
This comparison is based on each extension's public Chrome Web Store listing as of the date above. Features change; check both listings for the current state, and weigh a tool by whether you can verify its numbers.
Which should you pick?
Pick Zillow Deal Analyzer if you want the barest one-click read and nothing else. Pick Mortar if you want to see the formulas, correct the rent, use real local taxes, and screen against your own criteria.
Try Mortar on a real listing
Free to start, no credit card. Or run the numbers by hand with the free rental property calculator.
Related reading: The best Zillow Chrome extensions for real estate investors