add a second number to your smartphone

personal numbers aren’t for work

stop carrying two phones

ditch your landline

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Sideline Inbox Mockup

get a real phone number

Choose a local area code (if you want) and add a 2nd number to your smartphone.

custom voicemail

Record and manage multiple voicemail greetings for your Sideline number.

carrier reliability

Calls use your carrier network and minutes (which are likely unlimited) so everything works like normal.

know who’s calling

Separate caller ID, notifications and ringtones let you know who’s contacting your Sideline.


Texting is free and unlimited. Sideline’s inbox puts all your communication in one place.

use with teams

Teams can assign, manage and reclaim numbers as people come and go.

transfer your number

Number porting lets you move existing numbers to Sideline or take them with you if you leave.

international calling*

It’s a small world after all. *Coming soon. Learn more.

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benefits for individuals

Sideline puts your work and personal numbers together on one device but keeps them separate in every other way.



With 2 numbers on 1 phone, your personal line stays private.



There’s no “I” in free, but that’s okay. Sideline is totally free for individuals.


BYO number

Number porting lets you transfer an existing work number from another device or landline.


high quality calling

Unlike spotty VoIP services, Sideline uses your carrier so your 2nd line is as reliable as your 1st.

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benefits for teams

Sideline lets companies manage work numbers on the phones their employees already have (and know how to use).

"Great little app!!! I love the fact that I can use this as my secondary number and it works without any hiccups"
− Peter M
"Awesome. Exactly what I needed to take care of my business."
− Thomas B
"Everything works just as it says, calls are very clear, texts on point, love love love it…"
− Trisha
"Really reliable, really useful."
− Charlie I
"Where has the app been all my life?"
− Brenna M

pricing options

One simple pricing plan for everyone.

Sideline is free to use for as long as you want. If you need them, you can manage team lines or add other features after sign up.

for Individuals

$0.00 yep,
  • - Choose a Local Area Code
  • - (Or) Port In An Existing Number
  • - Carrier Reliability
  • - Unlimited Texting
  • - Custom Voicemail Greetings
  • - Auto-Text Replies
  • - Ad-Supported
  • - You never have to pay us for minutes
  • - Calls use your current plan
    (unlimited or not).
  • optional in-app purchases:
  • - Remove Ads

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for teams (beta)

$9.99 per month
per user
  • Team accounts include everything in the free version, plus:
  • - Managed Employee Numbers
  • - Assign & Reclaim Numbers Remotely
  • - Online Admin Portal
  • - No Ads or Number Expiration
  • - Wi-Fi / VoIP Backup
  • - Number Porting (in/ out)
  • - Free 30-Day Trial
  • - Prioritized Customer Support
  • optional add-ons:
  • - International Calling (coming soon)
  • - Voicemail Transcription (coming soon)

free 30-day trial

about us

Sideline is powered by Pinger, Inc.

We created Sideline for anyone who needs a 2nd number for work, or simply to keep their personal number private. Here’s what we’ve done so far:

  • 121 million+ phone numbers given out
  • 3.3 billion+ calling minutes connected
  • 100 billion+ text messages processed


How Does Sideline Calling Work?

Sideline uses your carrier network. Incoming calls ring like normal with a “Sideline” caller ID. For outbound calls, just open Sideline instead of your native calling app.

Why Does Sideline Use My Carrier Network?

This gives you the same great call quality and reliability you get from your regular number.

Does Calling Cost Anything?

If you have unlimited minutes on your carrier plan, Sideline calls don’t cost extra. This is the case for most cellular customers in the U.S.

If you have limitations on your carrier plan, know that Sideline uses your calling minutes. Check with your carrier to see if any calling or messaging fees may apply.

What About Texts? Do I Pay For Those?

Nope. Texts are totally free.

Will Sideline Calls Show Up On My Phone Bill?

Yes. Sideline calls show up on the monthly statement from your service provider. They’ll appear like calls from your regular mobile number.

Can I use WiFi for Calling?

Yes. Do what makes you happy. Subscribing to Sideline Pro lets you toggle between WiFi and carrier networks.