I'm not certain this would fit your needs, but Clearbit is the first tool that came to mind because they do have per-API-call pricing for their Enrichment tool. What tools are you looking at so far, and how are you hoping to integrate them with your customer data?
If you are looking mobile identity, then https://www.boku.com/identity-solutions/ Boku might be of good help. I think they offer per-identity check pricing. I am not sure what do you mean by offline. Are you looking for some product that takes biometric by going to the user as well?
Looking for a better way to plan remote meetings across time zones, and keep up with events. What software is doing that best today?