HouseSigma is where you dig into sold prices and AI-estimated home values for listings already on the market. Pin.Casa is what watches for you — including homes that aren't listed yet, aren't officially for sale, or are outside the exact search you set up.
What HouseSigma does well
Deep sold-price and listing history on individual homes.
AI-estimated home values to gauge what a property might be worth.
Saved searches with alerts for new listings, price changes, and status updates.
Strong coverage and a well-known mobile app in Ontario and BC markets.
What HouseSigma can't do
Alert you to a home before it's officially listed — a saved search only matches homes that are already on the market.
Track price changes on one specific address you care about, rather than a list of active results.
Watch an entire school catchment, subdivision, or postal code for anything new that lists inside it.
Notify you the instant something changes — it requires a matching saved search to already exist.
Feature by feature
HouseSigmaPin.Casa
Pin a home before it's listed—✓
Alert the instant a new listing appears✓✓
Automatic price-change tracking on one address—✓
Watch a whole street or neighbourhood—✓
Open house alerts✓✓
Sold price history✓✓
AI home value estimates✓—
Works whether or not you have an agent✓✓
Free, with no premium tier?✓
Feature comparison based on publicly available product information as of October 2026. HouseSigma's sold-price depth and AI valuation tools are not something Pin.Casa currently offers.
Why Pin.Casa is free forever
Pin.Casa is free for the same practical reason most useful buyer tools are: local real estate agents and businesses advertise on the map, not buyers paying a fee. No premium tier, no credit card, unlimited pins and alerts — for as long as you use it.
Common questions
Is Pin.Casa affiliated with HouseSigma?
No. Pin.Casa is an independent service. We are not owned by, operated by, or affiliated with HouseSigma.
Can I use Pin.Casa and HouseSigma together?
Yes. HouseSigma is great for researching sold prices and AI-estimated home values. Pin.Casa's job is different: it watches addresses you care about — including ones that are not listed yet — and tells you the moment something changes, instead of you having to keep checking back.
Is Pin.Casa really free?
Completely free. No premium tier, no credit card, unlimited pins and alerts. Pin.Casa is funded by local real estate agents and businesses advertising on the map, not by charging buyers.
Does Pin.Casa replace my real estate agent?
No. Pin.Casa works independently of any agent. You can still work with one — we just make sure you never miss a listing before they call you.
How is this different from a saved search on HouseSigma?
A saved search only matches homes that are already listed. A Pin.Casa pin can watch a specific address that has never been listed, a school catchment, a subdivision, or a postal code — and alerts you the instant anything inside it lists, changes price, books an open house, or sells.