[cmadan]

Facebook allows a few other third party tools for measurement/attribution analysis. Ref https://facebookmarketingpartners.com/marketing-partners/#ad....

[vincentbarr]

No, they cannot provide measurement and attribution for campaigns that use Website Custom Audiences or Lookalike audiences, which are often the two largest, most valuable segments of any campaign. Atlas is the only provider that can.

Also, this list points to mobile measurement companies.