1. Salesforce Org Compare – https://sforgcompare.herokuapp.com/

 

2.  Copado – https://appexchange.salesforce.com/listingDetail?listingId=a0N3000000B3dgGEAR

3. GearSet – https://gearset.com/blog/understanding-your-org-comparison/

 

4. VS Code – https://marketplace.visualstudio.com/items?itemName=chuckjonas.salesforce-diff