When you’re running a business, the last thing you want is to use your personal number for your company. Imagine putting your private phone number on Google for all to see or getting business calls through the night with no way to distinguish them from your personal calls. Using a personal number can quickly grow bothersome, hectic, and unsecure, especially as your business expands.

The good news is getting an alternate phone number — one that you can exclusively use for business — is simple and affordable. Instead of purchasing a brand-new landline or cell phone, all you need to do is sign up for a second phone number app to separate business and personal calls with ease.

11 best second phone number apps

To help you find the best second phone number app for your business, we’ve compiled 11 options that allow you to create one or more alternate phone lines.

1. OpenPhone

Best second phone number apps: OpenPhone's interface

OpenPhone is a modern VoIP phone system built for businesses to help growing teams easily scale their communication. When you sign up, you can get one free US, Canadian, or toll-free number for every user on your team — and you can always get more numbers for $5 each per month.

Alternatively, you can assign specific team members to shared phone numbers so anyone who’s available can pick up calls or respond to texts.

OpenPhone is far more than a second phone number app. It’s here to help your business streamline your phone and text communication. For example, you can set up automations like auto-attendant, which lets your clients route their own calls, and texting auto-replies. Or, you can integrate with business apps like Gmail, Slack, Zapier, and HubSpot to speed up your workflow.

OpenPhone starts at $13 per user per month.

Get a second phone number in minutes through OpenPhone. See for yourself why thousands of businesses use OpenPhone — sign up for a free, one-week trial.

Key features

  • Unlimited calls and texts in the US and Canada
  • Text from your computer, smartphone, or tablet 
  • Affordable international calls
  • Shared phone numbers
  • Direct team messaging, internal threads, and other collaborative elements
  • Call recording
  • Voicemail transcriptions
  • Auto-attendant (IVR)
  • Schedule text messages
  • Text message auto-replies
  • Business hour settings
  • Integrations with business apps like Slack, Zapier, and HubSpot CRM

2. Sideline

Put your phone to work with Sideline.

Sideline is a smartphone app that supports alternate phone numbers within the contiguous US. It also offers a web app, though it doesn’t support phone calls.

Sideline is best known as a text messaging service for business, which means its most useful features — like auto-replies and text marketing tools — help you text clients with ease. International calling and auto-attendant aren’t even available unless you upgrade. Toll-free numbers, call recordings, and integrations aren’t possible at all with Sideline. 

Sideline starts at $9.99 per month. You’ll need to activate VoIP calling to make calls over the internet instead of using your cell phone minutes.

Key features

  • Unlimited calls and texts in the US (except Hawaii and Alaska)
  • Shared phone numbers
  • Text message auto-replies
  • Text message templates
  • Business hour settings (upgrade and iOS required)

3. Google Voice

As a second phone number app, Google Voice helps you work from anywhere.

Google Voice for Google Workspace is a popular second phone number app that’s available through their Android, iPhone, and web apps. However, it offers fairly limited features for a business phone system, even with upgrades. Google Voice doesn’t support toll-free numbers, call recording, or many other features that modern businesses need.

While Google Voice offers call forwarding to all users, you need to upgrade for auto-attendant. Plus, integrations are limited to two Google tools, which don’t even include Gmail.

Google Voice for Google Workspace starts at $10 per user per month. However, you’ll also need to subscribe to Google Workspace, which starts at $6 per user per month, to access this second phone number app.

Key features

  • Unlimited calls to the US or to Canada from the US
  • Unlimited texts in the US
  • Auto-attendant (upgrade required)
  • Integrations with Google calendar and Google Meet

4. Burner

Organize your calls and texts with Burner.

Burner is a second phone number app for Android and iOS that’s designed to protect your privacy. From spam blocking technology to do-not-disturb settings, it’s filled with features that can keep you safe. Plus, after you sign up, you can treat your alternate phone numbers like burner numbers by switching or deleting them at any time.

However, Burner isn’t the best option for growing teams. While the app offers local phone numbers with area codes throughout the US and Canada, you’re limited to three numbers per account. Don’t expect any advanced business features beyond text message auto-replies either.

Burner starts at $9.99 per month.

Key features

  • Unlimited calls and texts in the US and Canada
  • Text message auto-replies
  • Spam call blocking
  • Integrations with business apps like Slack, Google Drive, and Evernote

5. TextFree

Comparing the best second phone number apps: TextFree

TextFree is a smartphone and desktop app that lets you access a US phone number when you sign up for free.

However, don’t expect any outstanding business features from this second phone number app. Since it’s built for personal use, you won’t be able to add team members, get extra phone numbers, or send international texts. Plus, outbound calls come at an extra cost.

You can sign up for TextFree for free, but you risk losing your alternate phone number if you go 30 days without making a phone call or sending a text. Its limited paid plan starts at $9.99 per month.

Key features

  • Unlimited texting in the US
  • Unlimited inbound calls (minutes or upgrade required for outbound calls)
  • International calls to Canada, Mexico, Singapore, and India (minutes required)

6. Line2

Line2 is a complete business phone system on the cloud.

Line2 is a second phone number app that supports up to five local and toll-free numbers on every account. It’s available as a desktop and mobile app.

However, it’s not a robust platform by any means. While Line2 supports free calling for up to 99 users with all its plans, most of the business features that you may need require plan upgrades or add-ons.

Line2 starts at $15.99 per month.

Key features

  • Unlimited calls in the US and Canada
  • Unlimited texts in the US
  • Auto-attendant (upgrade required)
  • Call recording (add-on or upgrade required)
  • Voicemail transcriptions (add-on or upgrade required)

7. Dialpad

Screenshots of Dialpad's user interface

Dialpad is a feature-rich business phone system that offers a number of helpful features, like call recording and voicemail transcriptions with every plan. It also supports one local number with every plan. If you want your new number to be toll-free, you can expect to pay an extra $15-$17 per month.

Dialpad pushes users to upgrade, which can make it an incredibly costly service for small businesses. You can’t send international texts, set up auto-replies, or integrate with apps (other than Google Workspace and Office 365) without an upgrade — and you’ll need to pay for at least three users for a Pro plan or 100 users for an Enterprise plan if you do upgrade.

Dialpad starts at $20 per user per month.

Key features

  • Unlimited calls and texts in the US and Canada
  • Call recording
  • Voicemail transcriptions
  • Auto-attendant (IVR)
  • Integrations with business apps like Slack, Zapier, and HubSpot (upgrade required)

8. Vonage

As a second phone number app, explore Vonage's unified communications features.

Vonage is a VoIP platform that’s been helping users access second phone numbers without new landlines for over two decades. But like many other legacy systems, you may run into issues with Vonage. While Vonage offers plenty of business features, many of them (like auto-attendant and call recording) require upgrades or come at an extra cost. You can access over 20 third-party app integrations with a standard plan, but toll-free numbers don’t come free.

Plus, MMS (picture messaging) is only available with API implementation, which can make it inaccessible to any team without developers.

Vonage starts at $19.99 per line per month.

Key features

  • Unlimited calls to US, Canada, and Mexico
  • Unlimited SMS to the US and Canada
  • Auto-attendant (upgrade required)
  • Call recording (upgrade required)
  • CRM integrations (upgrade required)

9. Ooma

Work, collaborate, and connect from anywhere with Ooma Office Pro.

Ooma is a second phone number app that’s built for small businesses. When you sign up, you can get one free toll-free number for your team or choose from a variety of local numbers. It also uniquely supports overhead paging.

The downside is Ooma is pretty costly for the value it provides. You can’t access integrations or analytics with any plan. Plus, you need to upgrade to access Ooma’s desktop app. Otherwise you can only work exclusively via your phone using Ooma.

Ooma starts at $19.95 per user per month.

Key features

  • Unlimited calls to US, Canada, and Mexico
  • Auto-attendant
  • Call recording (upgrade required)
  • Voicemail transcriptions (upgrade required)

10. Grasshopper

Comparison of the top second phone number apps: Grasshopper

Grasshopper is another platform marketed toward small businesses. It differs from other second phone number apps by offering 100% of its features — including voicemail transcriptions and custom voicemail greetings — with every plan. However, this means you’ll have to pay based on the amount of phone numbers and extensions you need.

Since the basic plan only includes one phone number (and five with its highest-tier option), Grasshopper isn’t the best VoIP service for growing teams.

Grasshopper also lags behind when it comes to modern business phone features. For example, it doesn’t offer integrations, shared phone numbers, or call recording. While it offers local and toll-free numbers, you can only send MMS and group messages from local US numbers — and you can’t send SMS messages internationally or from a toll-free number to a Canadian number.

Grasshopper starts at $29 per month.

Key features

  • Unlimited calls in the US and Canada
  • Call forwarding
  • Voicemail transcriptions
  • Custom voicemail greetings

11. JustCall

Close more deals and keep customers happy with JustCall.

JustCall is a second phone number app that offers alternate phone numbers from 70 different countries, which can be helpful for brands with an international presence. It’s a high-tech platform that offers plenty of automations, created especially for sales and support teams. However, it can get incredibly pricey, even for large teams.

While JustCall is free for inbound calls if you have a local phone number, you’ll need to pay by the minute for outbound calls, as well as all calls from toll-free numbers.

JustCall starts at $30 per user per month.

Key features

  • Unlimited incoming calls for local numbers
  • Call recording
  • Voicemail transcriptions
  • Auto-attendant
  • SMS automations
  • Integrations with over 100 business apps

Get started with OpenPhone, the best app for alternate phone numbers

Screenshot of contacts in OpenPhone's mobile app, one of the best second phone number apps.

Signing up for a second phone number app is a simple and affordable way to separate business calls from personal ones, so you don’t need to answer to clients when your workday is over. An alternate business phone number also ensures your personal number stays private.

But while all second phone number apps offer these perks, they’re all equipped with different features and pricing plans.

OpenPhone offers high-value features — including shared phone numbers, integrations, and call recording — on every plan, so you don’t need to rely on upgrades to get the features that modern businesses need. Start your seven-day free trial of OpenPhone.

Second phone number app FAQ

Every phone system is different, with some offering far more benefits than others. However, our answers to these frequently asked questions will help you explore how second phone number apps function at their core.

What is a second phone number app?

A second phone number app is a virtual phone system that lets you get a second line without purchasing a new device. When you open your app from any compatible device — such as your mobile phone, tablet, or computer — you can make calls or send texts from your alternate phone number, which is linked to your account. This makes it possible for you to have two phone numbers on one phone.

How can I use a second phone number app?

Getting started with a second phone number app is usually as simple as signing up for a VoIP phone service, selecting a new phone number, and downloading your VoIP provider’s app.
To make a phone call or send a text message on your second phone number app, all you need to do is dial a number or select a contact, just as you would on your smartphone’s built-in calling and texting apps.

How do second phone number apps work?

Many second phone number apps allow you to make calls and send texts using any internet connection, including WiFi. However, some providers require you to use your cell phone minutes or data, which means you still need a traditional phone plan.

Is a second phone number app safe?

The best second phone number apps have plenty of security features, including call encryption, that keeps your information safe. Of course, it’s always best to take precautions (like using strong passwords and virtual private networks) to boost your security, as you would on any digital app.

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Author

Emily is a freelance business and marketing writer based in the desert, though her writing is anything but dry. Her passion is writing compelling, human-friendly content that helps growing businesses perform better.

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