Stay private
with a 2nd phone number
Stay private with a 2nd phone number
The Sideline app gives you a reliable 2nd number to share publicly, keeping your personal number private and protected.
Get the App
Protect your identity
With a separate 2nd number, Sideline helps you stay safe and anonymous whenever you need to.
Communicate with confidence
Use your Sideline number when contacting strangers and businesses, signing up for services, buying or selling online, and more.
Avoid spam & scams
Sideline suggests names of unknown callers and texters, and helps you recognize spam by clearly labeling and displaying it.
A second phone number—and so much more
Superior Call Quality
Sideline uses your carrier’s network for top-tier call quality.
No WiFi Needed
Unlike VoIP services, Sideline gives you the freedom to leave your WiFi network.
Avoid Spam
We detect spam calls, telemarketers, and potential fraud so you can easily avoid them.
Auto-Reply
Send an automated text reply to any missed calls or messages.
Separate Voicemail
Record your Sideline greeting so people can leave a message after the beep.
Unlimited Messaging
Send unlimited SMS, MMS, and group messages.
Number Porting
Already have a second number? Bring it to Sideline from another device or landline.
Ring & Text Tones
Differentiate between numbers with unique ring and text tones.
Get started with Sideline today
Available on iOS and Android.
