Sideline vs. GoDaddy (SmartLine)
When you compare,
there's no comparison.
2nd Phone Number
Choose a reliable 2nd number with unlimited calling, texting, and voicemail. Learn More
Streamline your communication by managing calls and texts in one place.
Already have a second number? Feel free to port it over from another service, device, or landline. Learn how to port from Smartline to Sideline.
Unlimited Calls & Texts in U.S. + Canada
Smartline is restricted to U.S numbers only.
Patented Carrier Call Quality
Sideline uses proprietary technology to connect calls via your cellular network for unrivaled reliability.
Optional VoIP Calling
Connect calls via the internet by enabling optional VoIP if your cellular coverage is spotty.
Automatically respond to missed calls and texts whenever you’re busy. Learn More
Advanced Caller ID
Sideline displays a suggested name for incoming callers to help you identify and prioritize them.
Send and receive SMS & MMS in a group conversation.
Create and manage multiple voicemail greetings for separate circumstances.
Choose a different ringtone for your 2nd number so you can easily tell which line is ringing.
Follow your calling.
Sideline gives you a 2nd number with all the communication tools you need to start, work, grow, and pursue your passion.
Try it free for 7 days — Only $14.49/mo after
Available for iOS and Android.
Here's what users are saying about Sideline:
"Awesome app. I've tried a lot of them and this one has the best call quality because it runs off of your cellular network."
- Najee W, Sideline User
"Great app. Great call quality.
Perfect second line."
- Wa J, Sideline User
"A must-have app for small business... It's the best out there. Hands down."
- Nick74952, Sideline User