Birdie vCard Importer is described as 'If you have lot of contacts in your address book and looking forward for a right solution to move them into Outlook without making any changes during the process'. There are 2 alternatives to Birdie vCard Importer for Windows. The best alternative is vCard Import-Export for Outlook.
With vCard ImportExport, you are able to easily import multiple vCard files (known as .vcf files) to your Microsoft® Outlook® contacts - simply, select the contacts folder and the files to import - the app will do the job from there.
SysTools vCard importer tool is an advance and well capable utility to import multiple contacts details saved in single vCard folder to Outlook PST file format. Well with this tool you can import multiple contacts in one go by just selecting it.