Capability Free version
Always free
Full version
1700 Euro Annually
Prevent Duplicates creation    
Get overview on Duplicates    
Define bespoke rules 1 rule only Unlimited
Bulk detect Duplicates Based on 1 rule Unlimited
Bulk Automerge 10 records Unlimited
Support NO YES

If your CRM is Dynamics 365/Online, then download from AppSource

If your CRM is On-Premise, then download from here
(CRM 2015 8.2 and higher is supported)