• Which wholesale dial provider will increase your revenue and profitability the most?
• Which provider will minimize the cost of building and maintaining a network for your expansion?
• Who retains control of user authentication?
• Who remains in control of sales, marketing, customer service, and billing?
• Is the service scalable?
• Who provides the wholesale dialup provider's backbone connections?
• Does the wholesale dialup provider support service level agreements (SLAs) for uptime guarantees or no busy signals?
• What happens when you have to resolve a technical problem?

To be added:
IP Applications
ISIPI
ISPBrand

Larger providers:
XO Communications