Unlike CryptoBNB, another project in the property rental space, Rentberry, hasn't disappeared from the face of the earth.
Rentberry – Long-term apartment rentals are a blockchain startup in the rental industry, and one of their major unique selling points is that they allow for crowdsourced security deposits on their platform. To find out the exact details of how their system works, jump onto their Telegram channel and chat with their admins:
https://t.me/rentberryTo try to cover some of your question myself though, their platform is being developed currently so that security deposits are collectively made between a number of holders of their cryptographic token, BERRY. BERRY is transferred and held using blockchain for the landlord to know that they have access to it, if for example property damage occurs. However, because the security deposit is held in the system it protects against landlords being able to maliciously hold security deposits without reason after the lease is up.
As a side note, token holders can also earn 7% passive income from funding security deposits using this model.
As far as I’m aware, no-one else has even considered trying to disrupt the security deposit aspect of the rental market yet - keep an eye out for more from Rentberry, they currently have thousands upon thousands of properties listed across the US and are expanding to other markets such as Europe and Australia later this year.