Virtual International Authority File vs BnF authorities

How do Virtual International Authority File and BnF authorities compare? Here are the facts side by side: pricing, platforms, open-source status and what each one is for.

Directory details: Virtual International Authority File and BnF authorities
Directory detail	Virtual International Authority File	BnF authorities
What it is	VIAF combines multiple library name authority files into a single OCLC-hosted authority service.	Search authority records through the Bibliothèque nationale de France's BnF data portal.
Website	viaf.org	data.bnf.fr
Type	Website	Website
Topic	Open Data & Datasets	Open Data & Datasets
Pricing	Not confirmed	Not confirmed
Platforms	Web	Web
Open source	Not stated	Not stated
Language	English	French
Alternatives	24 alternatives	24 alternatives