@lisa114 You can start the OSInt procedure as they've given founding date & employees.
Write down all Real Estate Startups on that date in spreadsheet.
Next, you'll see they've given very less info so you've gotta make-up a front that you've bought a few businesses before.
Now this is work but if you wanna find what startup it is, then you can do this.
There are actual companies who do this. Like Demand Curve who advice YCombinator asks people to sign up to their competitors using friends & families email.
And there are companies like Tiny that asks details on their competitors. I think @levelsio on Twitter once said they pretended to acquire his site which is #1 remote jobs website & got all their info. Private equity folkds do this quite often.
So depending on whether you really want to make this, you can try doing it & get all info straight from the source.
Or use OSInt to nail down founders & all to meet for coffee. I've wrote some info on OSInt & SOCMint above. Click the links to find it.