Sideline vs. GoDaddy (SmartLine)

Smartline has historically been a solid choice for those seeking a basic 2nd phone number. However, GoDaddy is sunsetting the Smartline app starting December 31, 2023.
Sideline powers millions of phone numbers with patented, carrier-level call quality and unlimited texting while boasting a wide variety of features to make communicating with your 2nd number more convenient.
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When you compare,
there's no comparison.

2nd Phone Number

Choose a reliable 2nd number with unlimited calling, texting, and voicemail. Learn More

Yes
Yes

Unified Inbox

Streamline your communication by managing calls and texts in one place.

Yes
Yes

Number Porting

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.

Yes
Yes

Unlimited Calls & Texts in U.S. + Canada

Smartline is restricted to U.S numbers only.

Yes
No

Patented Carrier Call Quality

Sideline uses proprietary technology to connect calls via your cellular network for unrivaled reliability.

Yes
No

Optional VoIP Calling

Connect calls via the internet by enabling optional VoIP if your cellular coverage is spotty.

Yes
No

Auto-Reply

Automatically respond to missed calls and texts whenever you’re busy. Learn More

Yes
No

Advanced Caller ID

Sideline displays a suggested name for incoming callers to help you identify and prioritize them.

Yes
No

Group Messaging

Send and receive SMS & MMS in a group conversation.

Yes
No

Multiple Voicemails

Create and manage multiple voicemail greetings for separate circumstances.

Yes
No

Custom Ringtone

Choose a different ringtone for your 2nd number so you can easily tell which line is ringing.

Yes
No

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:

5 Stars Rating

"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

5 Stars Rating

"Great app. Great call quality.
Perfect second line."

- Wa J, Sideline User

5 Stars Rating

"A must-have app for small business... It's the best out there. Hands down."

- Nick74952, Sideline User