What are some alternatives?
When comparing SendHub and AnyRoom, you can also consider the following products
Twilio - Brings voice and messaging to your web and mobile applications.
Lateral - Lateral automates information discovery for enterprises.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Clever Cloud - Clever Cloud helps developers deploy and run their apps with bulletproof infrastructure, automatic scaling, fair pricing and other cool features.
Bandwidth - Bandwidth offers SIP trunking, Emergency communications, and Voice & Messaging APIs.
Grasshopper - Grasshopper enables entrepreneurs to build a virtual office that connects callers to employees, wherever they are.