Second phone numbers · Ranked

The best second phone number app for business (2026)

The best second phone number app for business is Phone2: for $7 per user/month on annual billing you get a real business number, keep it separate from your personal cell, and can add teammates to the same line later, which pure second-number apps cannot do. Google Voice is the best free-ish option if you already use Google Workspace, and Sideline or Line2 are fine for a simple personal-brand second line. Here is how they score for business use specifically.

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Last updated July 2026. Competitor pricing verified as of July 2026. Reviewed by Audrey Xi, Product Analyst.

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How we ranked them

A second number for business is not the same as a burner. You want to keep work off your personal cell, look professional, text customers, and ideally not have to rip it out and start over if you hire someone. We scored the popular apps on exactly those business needs.

Price

25% of score

Monthly cost for a business-usable second number, on the best annual rate.

Business features

30% of score

A real business number, shared line and team inbox, voicemail transcription, and room to add teammates.

Business texting

20% of score

SMS and MMS to customers, auto-replies, and whether outbound texting is reliable and compliant.

Keeps work separate

25% of score

A clean second line with its own hours and voicemail so work never rings your personal number.

The ranking, scored

Each product scored 1 to 5 per criterion. Overall is the weighted average on a 5-point scale.

#	Product	Price	Business features	Business texting	Keeps work separate	Overall	From
1	Phone2Our pick	5/5	5/5	5/5	5/5	5.0	$7/user/mo
2	Google Voice	5/5	2/5	3/5	4/5	3.5	Free
3	Quo	3/5	5/5	5/5	5/5	4.5	$15/user/mo
4	Sideline	4/5	2/5	4/5	5/5	3.7	$10.83/mo
5	Line2	4/5	2/5	4/5	4/5	3.4	$9.99/mo

Prices are the best available rate (annual where offered) and were verified against each vendor pricing page as of July 2026.

Phone2

Best second number for a business

Owners who want a real business line they can grow into a team.

$7/user/mo$10 monthly · local or toll-free number · business hours + team inboxScore 5.0/5

Pros

A real second business number with its own hours, voicemail, and inbox
Add teammates to the same number later, no migration needed
Business texting (outbound SMS/MMS on Pro) and AI transcription
Local or toll-free numbers, with free porting

Cons

–Outbound texting needs Pro ($15/user) plus carrier registration
–More product than a pure burner-number app if you truly only want one line

The best choice when the second number is for a business, not just privacy. It is the only app here that starts as your personal-work divider and scales into a shared team line.

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Google Voice

Best free-ish second number

Solos already in Google who want a simple free personal line.

FreePersonal is free (US only) · business tier $10/user + WorkspaceScore 3.5/5

Pros

Free personal second number that keeps work off your cell
Familiar Google app and voicemail transcription

Cons

–Personal tier is US-only with no business features
–The business tier needs paid Workspace and still has no shared numbers

Great as a free divider between work and personal. As a business line it stalls fast: no shared numbers, no team, limited texting.

Phone2 vs Google Voice Google Voice alternative Visit site

Quo (formerly OpenPhone)

Best if you will grow a team

Solos who expect to hire and want CRM sync from day one.

$15/user/mo$19 monthly · shared numbers and CRM on higher plansScore 4.5/5

Pros

A polished second number that is a full business phone
Shared numbers and CRM sync when you add people
Strong business texting and AI summaries

Cons

–At $15/user it is the priciest second-number option here
–Overkill if you truly only want one private line

A first-class second number if you know a team is coming. Phone2 does the same job from $7, so Quo earns this spot on polish rather than price.

Phone2 vs Quo Quo alternative Visit site

Sideline

Best simple personal-brand line

Solo operators who want one clean second line and nothing more.

$10.83/mo$129.99/year annual · $14.49 month to monthScore 3.7/5

Pros

Simple, reliable dedicated second line with auto-reply and business hours
Group messaging and voicemail included

Cons

–Single-user only: no shared numbers or team inbox
–No AI transcription or CRM, limited integrations

A tidy one-person second line for a personal brand. It does not grow with you, so it suits a solo who will stay solo.

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Line2

Basic paid second line

Solos who want unlimited calling on a cheap dedicated number.

$9.99/mofrom $9.99/mo · unlimited US/Canada calling and textingScore 3.4/5

Pros

Low-cost dedicated second number with unlimited US/Canada calling
Voicemail-to-email and call forwarding

Cons

–No shared numbers, call transcription, or integrations
–Dated experience and single-user only

Covers the basics of a second line cheaply. Once you need business texting workflows, a team, or AI, it runs out of room.

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Where we would not pick Phone2

If all you want is a free, private second number to keep work calls off your personal cell, Google Voice personal or a simple app like Sideline is enough, and Phone2 is more than you need. Phone2 wins the moment the second number is a business line: something customers text, that has real hours and voicemail, and that a teammate can jump onto without you changing numbers.

FAQ

What is the best second phone number app for business use?

Phone2. For $7/user/month on annual billing you get a real business number that keeps work off your personal cell, supports business texting and AI transcription, and lets you add teammates to the same line later, which pure second-number apps like Sideline and Line2 cannot do.

What is the best free second phone number for business?

Google Voice personal is the best free option and keeps work separate from your cell, but it is US-only with no shared numbers or business features. If the number represents a business, a paid line like Phone2 ($7/user) is a better long-term base.

Can a second phone number app work for a whole team?

Most cannot. Sideline, Line2, and Google Voice are single-user. Phone2 and Quo support shared numbers and a team inbox, so several people can answer and text from the same second number, which is why they scale where burner apps stop.

What is the best business phone app for a solo business owner?

Phone2 for a line you plan to grow, since it starts at $7/user and adds teammates without a migration. Google Voice or Sideline are fine if you are certain you will stay a single line with no team.

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