Yes, CallHub provides API.
Yes, CallHub provides mobile app.
CallHub is located in Walnut, California
CallHub offers Freemium, Quotation Based, Subscription pricing models
Yes, CallHub can integrate with Freshsales, Salesforce, ZapierYou can find more integration for CallHub here
The starting price is not disclosed by CallHub. You can visit CallHub pricing page to get the latest pricing.