1. LoopNet – This is the largest commercial real estate platform with over 500,000 properties listed.

2. Zillow – One of the largest real estate websites, Zillow offers both residential and commercial property listings.

3. Realtor.com – Another popular real estate website offering both residential and commercial property listings.

4. CREXi – A commercial real estate platform that offers various property types, including multifamily, office, and retail.

5. CoStar – A real estate analytics company that provides data on properties and markets.

6. BiggerPockets – A social network for real estate investors that also offers property listings and educational resources.

7. Proxio – A global real estate platform that offers both residential and commercial property listings.

8. Catylist – A commercial real estate platform that focuses on the commercial real estate industry in North America.

9. Auction.com – A website that specializes in real estate auctions, including commercial properties.

10. Redfin – A real estate brokerage that offers city-specific property listings for commercial real estate opportunities.