Do you know what a welcome email is? It means the customer has already signed up, inputted their contact information, billing information, and is looking to get the value they invested back out of the SaaS product.
I'd be absolutely thrilled to get a phone call from a real live person in this instance.
Actually in many SaaS products (KissFlow included), you sign up for a free level of service to check it out first. No billing info submitted, level of commitment low.
A seemingly-mandatory phone call in 30 minutes is pretty aggressive for that situation.
I'd be absolutely thrilled to get a phone call from a real live person in this instance.