Callata vs Sideline: Phone System vs Second-Number App

Short answer: Sideline is a second-number app for one person, costing $14.49 per month (or $129.99 per year) for unlimited texting, calls and a separate voicemail on the phone you already own. Callata is a business phone system for a team at $99 per month including 5 users ($20 per additional user), with shared numbers, ring groups, a shared texting inbox, call recording with AI summaries and optional AI agents. Solo users who just want to separate business from personal should use Sideline. Teams that need several people to answer the same number should use Callata.

Sideline pricing is from its help center article "How much does Sideline cost?", and features are from sideline.com and its App Store listing, checked October 1, 2026.

What Sideline does well

Sideline, made by Pinger, gives you a second phone number inside an app. Its site lists:

• Calls over your carrier's network, so Wi-Fi is not required.
• Unlimited SMS, MMS and group messages.
• Auto-reply texts for missed calls and messages.
• A separate voicemail greeting.
• Spam detection and labeling, with suggested names for unknown callers.
• Number porting into Sideline.
• Distinct ring and text tones so you know which number is ringing.

It is an efficient way for a freelancer, real estate agent, tutor or side-business owner to stop giving out a personal cell number.

What Callata adds for a team

Callata is designed around the business rather than the person. The account includes up to three local numbers that anyone on the team can use, 5 users (more at $20 per user per month), unlimited inbound calling and a pooled 1,500 outbound US and Canada minutes per user per month (then $0.01 per minute), ring groups, extensions, hold, business-hours and after-hours routing, a shared texting inbox with templates and delivery receipts, voicemail transcription with urgency triage, call recording with AI summaries, and E911 on every number. Optional AI agents can answer calls, text, email and transfer callers.

Price comparison

	Sideline	Callata Office
Monthly	$14.49 per account	$99 for up to 5 users, then $20/user
6 months	$69.99 upfront	$594 (6 x $99)
12 months	$129.99 upfront	$1,188 (12 x $99)
Users	One person per account	5 included, more at $20/user/month
Numbers	One second number	Up to 3 local numbers
Texting setup	Included in the app	$49 one-time 10DLC registration
Changing your number	$5.99 one-time (per App Store listing)	Pick or port numbers in the account

On price alone, Sideline wins for one person by a wide margin. Even five people on separate Sideline accounts ($72.45 per month on monthly billing) would pay $26.55 less than Callata's $99, but they would have five unconnected numbers rather than one shared business line.

Feature comparison

	Sideline	Callata
Works on your existing phone	Yes, app	Yes, ring your cell, plus browser softphone
Shared number for several people	No	Yes
Ring groups and extensions	No	Yes
Business hours routing	No	Yes
Shared texting inbox	No	Yes
Missed-call auto-reply text	Yes	AI agents can text callers; voicemail triage schedules callbacks
Call recording	Not listed	Yes, with AI summaries
Voicemail transcription	In-app add-on ($2.99/mo per Sensor Tower listing)	Included, with urgency triage
AI agents	No	Optional, $0.25/min
E911 with registered address	Not listed	Yes

Where Sideline is stronger

Simplicity and price

Install, pick a number, done. For one person, nothing in this comparison beats $129.99 a year.

Carrier-network calling

Because Sideline places calls over your carrier network, call quality does not depend on the Wi-Fi or data connection where you are standing. Callata is an internet phone system, so call quality depends on your connection.

Spam labeling

Sideline flags likely spam and suggests names for unknown callers, which is useful when your business number is posted publicly.

Where Callata is stronger

The number belongs to the business

If your Sideline user leaves or goes on vacation, calls to that number wait for them. On Callata, calls ring a group, follow business hours, or go to voicemail or an AI agent, and the call and text history stays with the business.

Team texting

When customers text your business number, everyone on the team can see the conversation in one inbox and pick it up.

Records you can use

Recorded calls get transcripts and AI summaries with sentiment and action items. Voicemails are transcribed and sorted by urgency. That makes it easy to see what was promised to whom.

After-hours coverage

Callata's optional AI receptionist can answer after hours, take a detailed message, text the caller a follow-up and schedule a callback, billed only for minutes used.

A realistic growth path

Many businesses follow the same pattern. The owner starts with a second-number app so their personal cell stays private. Business picks up, and the owner adds a partner or first employee. At first the owner forwards calls or shares the login. Then a customer texts a question at 7pm, nobody sees it until morning, and the job goes to a competitor. That is usually the moment a shared system starts to make sense.

You do not have to switch everything at once. A common approach is to keep Sideline as a private line for the owner's personal business contacts while moving the published business number, the one on your website, truck or Google Business Profile, to a team system. Customers then reach the business, not a person, and the owner's direct contacts keep the number they already know.

Questions to ask yourself before paying more

• How many calls and texts to the business number go unanswered in a typical week?
• How much is one new customer worth to you? If a single recovered lead covers several months of a phone system, the math is easy.
• Does anyone besides you need to see customer conversations?
• Do you need a written record of what was agreed on calls?

If the answers are "few," "not much," "no" and "no," Sideline is the right tool and you should keep the savings.

When to switch from Sideline

• A second person needs to answer the business number.
• You are missing calls while on jobs or with clients.
• Customers text questions that a teammate could answer.
• You want recordings or summaries of customer calls.
• You want calls answered after hours without hiring.

If you tick two or more, a team phone system will likely pay for itself. Sideline supports number porting in, and Callata ports local numbers in for free; check with Sideline's support about porting a number out before you start.

More reading: Sideline alternatives, Callata vs Line2, Callata vs Google Voice and the best business phone for solo founders.

Try Callata

When your second number turns into the company's main line, Callata gives your team shared calling and texting, recorded calls with AI summaries and transcribed voicemail for $99 per month including 5 users. Sign up for Callata.